5576 lines
167 KiB
C
5576 lines
167 KiB
C
/**
|
|
******************************************************************************
|
|
* @file stm32f1xx_hal_i2c.c
|
|
* @author MCD Application Team
|
|
* @version V1.1.1
|
|
* @date 12-May-2017
|
|
* @brief I2C HAL module driver.
|
|
* This file provides firmware functions to manage the following
|
|
* functionalities of the Inter Integrated Circuit (I2C) peripheral:
|
|
* + Initialization and de-initialization functions
|
|
* + IO operation functions
|
|
* + Peripheral State, Mode and Error functions
|
|
*
|
|
@verbatim
|
|
==============================================================================
|
|
##### How to use this driver #####
|
|
==============================================================================
|
|
[..]
|
|
The I2C HAL driver can be used as follows:
|
|
|
|
(#) Declare a I2C_HandleTypeDef handle structure, for example:
|
|
I2C_HandleTypeDef hi2c;
|
|
|
|
(#)Initialize the I2C low level resources by implementing the HAL_I2C_MspInit() API:
|
|
(##) Enable the I2Cx interface clock
|
|
(##) I2C pins configuration
|
|
(+++) Enable the clock for the I2C GPIOs
|
|
(+++) Configure I2C pins as alternate function open-drain
|
|
(##) NVIC configuration if you need to use interrupt process
|
|
(+++) Configure the I2Cx interrupt priority
|
|
(+++) Enable the NVIC I2C IRQ Channel
|
|
(##) DMA Configuration if you need to use DMA process
|
|
(+++) Declare a DMA_HandleTypeDef handle structure for the transmit or receive channel
|
|
(+++) Enable the DMAx interface clock using
|
|
(+++) Configure the DMA handle parameters
|
|
(+++) Configure the DMA Tx or Rx channel
|
|
(+++) Associate the initialized DMA handle to the hi2c DMA Tx or Rx handle
|
|
(+++) Configure the priority and enable the NVIC for the transfer complete interrupt on
|
|
the DMA Tx or Rx channel
|
|
|
|
(#) Configure the Communication Speed, Duty cycle, Addressing mode, Own Address1,
|
|
Dual Addressing mode, Own Address2, General call and Nostretch mode in the hi2c Init structure.
|
|
|
|
(#) Initialize the I2C registers by calling the HAL_I2C_Init(), configures also the low level Hardware
|
|
(GPIO, CLOCK, NVIC...etc) by calling the customized HAL_I2C_MspInit(&hi2c) API.
|
|
|
|
(#) To check if target device is ready for communication, use the function HAL_I2C_IsDeviceReady()
|
|
|
|
(#) For I2C IO and IO MEM operations, three operation modes are available within this driver :
|
|
|
|
*** Polling mode IO operation ***
|
|
=================================
|
|
[..]
|
|
(+) Transmit in master mode an amount of data in blocking mode using HAL_I2C_Master_Transmit()
|
|
(+) Receive in master mode an amount of data in blocking mode using HAL_I2C_Master_Receive()
|
|
(+) Transmit in slave mode an amount of data in blocking mode using HAL_I2C_Slave_Transmit()
|
|
(+) Receive in slave mode an amount of data in blocking mode using HAL_I2C_Slave_Receive()
|
|
|
|
*** Polling mode IO MEM operation ***
|
|
=====================================
|
|
[..]
|
|
(+) Write an amount of data in blocking mode to a specific memory address using HAL_I2C_Mem_Write()
|
|
(+) Read an amount of data in blocking mode from a specific memory address using HAL_I2C_Mem_Read()
|
|
|
|
|
|
*** Interrupt mode IO operation ***
|
|
===================================
|
|
[..]
|
|
(+) Transmit in master mode an amount of data in non blocking mode using HAL_I2C_Master_Transmit_IT()
|
|
(+) At transmission end of transfer HAL_I2C_MasterTxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MasterTxCpltCallback
|
|
(+) Receive in master mode an amount of data in non blocking mode using HAL_I2C_Master_Receive_IT()
|
|
(+) At reception end of transfer HAL_I2C_MasterRxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MasterRxCpltCallback
|
|
(+) Transmit in slave mode an amount of data in non blocking mode using HAL_I2C_Slave_Transmit_IT()
|
|
(+) At transmission end of transfer HAL_I2C_SlaveTxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_SlaveTxCpltCallback
|
|
(+) Receive in slave mode an amount of data in non blocking mode using HAL_I2C_Slave_Receive_IT()
|
|
(+) At reception end of transfer HAL_I2C_SlaveRxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_SlaveRxCpltCallback
|
|
(+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_ErrorCallback
|
|
(+) Abort a master I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
|
|
(+) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
|
|
|
|
*** Interrupt mode IO sequential operation ***
|
|
==============================================
|
|
[..]
|
|
(@) These interfaces allow to manage a sequential transfer with a repeated start condition
|
|
when a direction change during transfer
|
|
[..]
|
|
(+) A specific option field manage the different steps of a sequential transfer
|
|
(+) Option field values are defined through @ref I2C_XFEROPTIONS and are listed below:
|
|
(++) I2C_FIRST_AND_LAST_FRAME: No sequential usage, functionnal is same as associated interfaces in no sequential mode
|
|
(++) I2C_FIRST_FRAME: Sequential usage, this option allow to manage a sequence with start condition, address
|
|
and data to transfer without a final stop condition
|
|
(++) I2C_NEXT_FRAME: Sequential usage, this option allow to manage a sequence with a restart condition, address
|
|
and with new data to transfer if the direction change or manage only the new data to transfer
|
|
if no direction change and without a final stop condition in both cases
|
|
(++) I2C_LAST_FRAME: Sequential usage, this option allow to manage a sequance with a restart condition, address
|
|
and with new data to transfer if the direction change or manage only the new data to transfer
|
|
if no direction change and with a final stop condition in both cases
|
|
|
|
(+) Differents sequential I2C interfaces are listed below:
|
|
(++) Sequential transmit in master I2C mode an amount of data in non-blocking mode using HAL_I2C_Master_Sequential_Transmit_IT()
|
|
(+++) At transmission end of current frame transfer, HAL_I2C_MasterTxCpltCallback() is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MasterTxCpltCallback()
|
|
(++) Sequential receive in master I2C mode an amount of data in non-blocking mode using HAL_I2C_Master_Sequential_Receive_IT()
|
|
(+++) At reception end of current frame transfer, HAL_I2C_MasterRxCpltCallback() is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MasterRxCpltCallback()
|
|
(++) Abort a master I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
|
|
(+++) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
|
|
(++) Enable/disable the Address listen mode in slave I2C mode using HAL_I2C_EnableListen_IT() HAL_I2C_DisableListen_IT()
|
|
(+++) When address slave I2C match, HAL_I2C_AddrCallback() is executed and user can
|
|
add his own code to check the Address Match Code and the transmission direction request by master (Write/Read).
|
|
(+++) At Listen mode end HAL_I2C_ListenCpltCallback() is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_ListenCpltCallback()
|
|
(++) Sequential transmit in slave I2C mode an amount of data in non-blocking mode using HAL_I2C_Slave_Sequential_Transmit_IT()
|
|
(+++) At transmission end of current frame transfer, HAL_I2C_SlaveTxCpltCallback() is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_SlaveTxCpltCallback()
|
|
(++) Sequential receive in slave I2C mode an amount of data in non-blocking mode using HAL_I2C_Slave_Sequential_Receive_IT()
|
|
(+++) At reception end of current frame transfer, HAL_I2C_SlaveRxCpltCallback() is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_SlaveRxCpltCallback()
|
|
(++) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_ErrorCallback()
|
|
|
|
*** Interrupt mode IO MEM operation ***
|
|
=======================================
|
|
[..]
|
|
(+) Write an amount of data in no-blocking mode with Interrupt to a specific memory address using
|
|
HAL_I2C_Mem_Write_IT()
|
|
(+) At MEM end of write transfer HAL_I2C_MemTxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MemTxCpltCallback
|
|
(+) Read an amount of data in no-blocking mode with Interrupt from a specific memory address using
|
|
HAL_I2C_Mem_Read_IT()
|
|
(+) At MEM end of read transfer HAL_I2C_MemRxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MemRxCpltCallback
|
|
(+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_ErrorCallback
|
|
|
|
*** DMA mode IO operation ***
|
|
==============================
|
|
[..]
|
|
(+) Transmit in master mode an amount of data in non blocking mode (DMA) using
|
|
HAL_I2C_Master_Transmit_DMA()
|
|
(+) At transmission end of transfer HAL_I2C_MasterTxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MasterTxCpltCallback
|
|
(+) Receive in master mode an amount of data in non blocking mode (DMA) using
|
|
HAL_I2C_Master_Receive_DMA()
|
|
(+) At reception end of transfer HAL_I2C_MasterRxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MasterRxCpltCallback
|
|
(+) Transmit in slave mode an amount of data in non blocking mode (DMA) using
|
|
HAL_I2C_Slave_Transmit_DMA()
|
|
(+) At transmission end of transfer HAL_I2C_SlaveTxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_SlaveTxCpltCallback
|
|
(+) Receive in slave mode an amount of data in non blocking mode (DMA) using
|
|
HAL_I2C_Slave_Receive_DMA()
|
|
(+) At reception end of transfer HAL_I2C_SlaveRxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_SlaveRxCpltCallback
|
|
(+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_ErrorCallback
|
|
(+) Abort a master I2C process communication with Interrupt using HAL_I2C_Master_Abort_IT()
|
|
(+) End of abort process, HAL_I2C_AbortCpltCallback() is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_AbortCpltCallback()
|
|
|
|
*** DMA mode IO MEM operation ***
|
|
=================================
|
|
[..]
|
|
(+) Write an amount of data in no-blocking mode with DMA to a specific memory address using
|
|
HAL_I2C_Mem_Write_DMA()
|
|
(+) At MEM end of write transfer HAL_I2C_MemTxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MemTxCpltCallback
|
|
(+) Read an amount of data in no-blocking mode with DMA from a specific memory address using
|
|
HAL_I2C_Mem_Read_DMA()
|
|
(+) At MEM end of read transfer HAL_I2C_MemRxCpltCallback is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_MemRxCpltCallback
|
|
(+) In case of transfer Error, HAL_I2C_ErrorCallback() function is executed and user can
|
|
add his own code by customization of function pointer HAL_I2C_ErrorCallback
|
|
|
|
|
|
*** I2C HAL driver macros list ***
|
|
==================================
|
|
[..]
|
|
Below the list of most used macros in I2C HAL driver.
|
|
|
|
(+) __HAL_I2C_ENABLE: Enable the I2C peripheral
|
|
(+) __HAL_I2C_DISABLE: Disable the I2C peripheral
|
|
(+) __HAL_I2C_GET_FLAG : Checks whether the specified I2C flag is set or not
|
|
(+) __HAL_I2C_CLEAR_FLAG : Clear the specified I2C pending flag
|
|
(+) __HAL_I2C_ENABLE_IT: Enable the specified I2C interrupt
|
|
(+) __HAL_I2C_DISABLE_IT: Disable the specified I2C interrupt
|
|
|
|
[..]
|
|
(@) You can refer to the I2C HAL driver header file for more useful macros
|
|
|
|
*** I2C Workarounds linked to Silicon Limitation ***
|
|
====================================================
|
|
[..]
|
|
Below the list of all silicon limitations implemented for HAL on STM32F1xx product.
|
|
(@) See ErrataSheet to know full silicon limitation list of your product.
|
|
|
|
(#) Workarounds Implemented inside I2C HAL Driver
|
|
(##) Wrong data read into data register (Polling and Interrupt mode)
|
|
(##) Start cannot be generated after a misplaced Stop
|
|
(##) Some software events must be managed before the current byte is being transferred:
|
|
Workaround: Use DMA in general, except when the Master is receiving a single byte.
|
|
For Interupt mode, I2C should have the highest priority in the application.
|
|
(##) Mismatch on the "Setup time for a repeated Start condition" timing parameter:
|
|
Workaround: Reduce the frequency down to 88 kHz or use the I2C Fast-mode if
|
|
supported by the slave.
|
|
(##) Data valid time (tVD;DAT) violated without the OVR flag being set:
|
|
Workaround: If the slave device allows it, use the clock stretching mechanism
|
|
by programming NoStretchMode = I2C_NOSTRETCH_DISABLE in HAL_I2C_Init.
|
|
|
|
@endverbatim
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modification,
|
|
* are permitted provided that the following conditions are met:
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
* 3. Neither the name of STMicroelectronics nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
|
|
/* Includes ------------------------------------------------------------------*/
|
|
#include "stm32f1xx_hal.h"
|
|
|
|
/** @addtogroup STM32F1xx_HAL_Driver
|
|
* @{
|
|
*/
|
|
|
|
/** @defgroup I2C I2C
|
|
* @brief I2C HAL module driver
|
|
* @{
|
|
*/
|
|
|
|
#ifdef HAL_I2C_MODULE_ENABLED
|
|
|
|
/* Private typedef -----------------------------------------------------------*/
|
|
/* Private define ------------------------------------------------------------*/
|
|
/** @addtogroup I2C_Private_Define
|
|
* @{
|
|
*/
|
|
#define I2C_TIMEOUT_FLAG 35U /*!< Timeout 35 ms */
|
|
#define I2C_TIMEOUT_BUSY_FLAG 25U /*!< Timeout 25 ms */
|
|
#define I2C_NO_OPTION_FRAME 0xFFFF0000U /*!< XferOptions default value */
|
|
|
|
/* Private define for @ref PreviousState usage */
|
|
#define I2C_STATE_MSK ((uint32_t)((HAL_I2C_STATE_BUSY_TX | HAL_I2C_STATE_BUSY_RX) & (~(uint32_t)HAL_I2C_STATE_READY))) /*!< Mask State define, keep only RX and TX bits */
|
|
#define I2C_STATE_NONE ((uint32_t)(HAL_I2C_MODE_NONE)) /*!< Default Value */
|
|
#define I2C_STATE_MASTER_BUSY_TX ((uint32_t)((HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | HAL_I2C_MODE_MASTER)) /*!< Master Busy TX, combinaison of State LSB and Mode enum */
|
|
#define I2C_STATE_MASTER_BUSY_RX ((uint32_t)((HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | HAL_I2C_MODE_MASTER)) /*!< Master Busy RX, combinaison of State LSB and Mode enum */
|
|
#define I2C_STATE_SLAVE_BUSY_TX ((uint32_t)((HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | HAL_I2C_MODE_SLAVE)) /*!< Slave Busy TX, combinaison of State LSB and Mode enum */
|
|
#define I2C_STATE_SLAVE_BUSY_RX ((uint32_t)((HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | HAL_I2C_MODE_SLAVE)) /*!< Slave Busy RX, combinaison of State LSB and Mode enum */
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/* Private macro -------------------------------------------------------------*/
|
|
/* Private variables ---------------------------------------------------------*/
|
|
/* Private function prototypes -----------------------------------------------*/
|
|
/** @addtogroup I2C_Private_Functions
|
|
* @{
|
|
*/
|
|
/* Private functions to handle DMA transfer */
|
|
static void I2C_DMAXferCplt(DMA_HandleTypeDef *hdma);
|
|
static void I2C_DMAError(DMA_HandleTypeDef *hdma);
|
|
static void I2C_DMAAbort(DMA_HandleTypeDef *hdma);
|
|
|
|
static void I2C_ITError(I2C_HandleTypeDef *hi2c);
|
|
|
|
static HAL_StatusTypeDef I2C_MasterRequestWrite(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_MasterRequestRead(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_RequestMemoryWrite(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_RequestMemoryRead(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_WaitOnFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, FlagStatus Status, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_WaitOnMasterAddressFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_WaitOnTXEFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_WaitOnBTFFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_WaitOnRXNEFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_WaitOnSTOPFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
|
|
static HAL_StatusTypeDef I2C_IsAcknowledgeFailed(I2C_HandleTypeDef *hi2c);
|
|
|
|
/* Private functions for I2C transfer IRQ handler */
|
|
static HAL_StatusTypeDef I2C_MasterTransmit_TXE(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_MasterTransmit_BTF(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_MasterReceive_RXNE(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_MasterReceive_BTF(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_Master_SB(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_Master_ADD10(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_Master_ADDR(I2C_HandleTypeDef *hi2c);
|
|
|
|
static HAL_StatusTypeDef I2C_SlaveTransmit_TXE(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_SlaveTransmit_BTF(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_SlaveReceive_RXNE(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_SlaveReceive_BTF(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_Slave_ADDR(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_Slave_STOPF(I2C_HandleTypeDef *hi2c);
|
|
static HAL_StatusTypeDef I2C_Slave_AF(I2C_HandleTypeDef *hi2c);
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/* Exported functions --------------------------------------------------------*/
|
|
/** @defgroup I2C_Exported_Functions I2C Exported Functions
|
|
* @{
|
|
*/
|
|
|
|
/** @defgroup I2C_Exported_Functions_Group1 Initialization and de-initialization functions
|
|
* @brief Initialization and Configuration functions
|
|
*
|
|
@verbatim
|
|
===============================================================================
|
|
##### Initialization and de-initialization functions #####
|
|
===============================================================================
|
|
[..] This subsection provides a set of functions allowing to initialize and
|
|
de-initialize the I2Cx peripheral:
|
|
|
|
(+) User must Implement HAL_I2C_MspInit() function in which he configures
|
|
all related peripherals resources (CLOCK, GPIO, DMA, IT and NVIC).
|
|
|
|
(+) Call the function HAL_I2C_Init() to configure the selected device with
|
|
the selected configuration:
|
|
(++) Communication Speed
|
|
(++) Duty cycle
|
|
(++) Addressing mode
|
|
(++) Own Address 1
|
|
(++) Dual Addressing mode
|
|
(++) Own Address 2
|
|
(++) General call mode
|
|
(++) Nostretch mode
|
|
|
|
(+) Call the function HAL_I2C_DeInit() to restore the default configuration
|
|
of the selected I2Cx peripheral.
|
|
|
|
@endverbatim
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Initializes the I2C according to the specified parameters
|
|
* in the I2C_InitTypeDef and create the associated handle.
|
|
* @param hi2c: pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Init(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
uint32_t freqrange = 0U;
|
|
uint32_t pclk1 = 0U;
|
|
|
|
/* Check the I2C handle allocation */
|
|
if(hi2c == NULL)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
|
|
assert_param(IS_I2C_CLOCK_SPEED(hi2c->Init.ClockSpeed));
|
|
assert_param(IS_I2C_DUTY_CYCLE(hi2c->Init.DutyCycle));
|
|
assert_param(IS_I2C_OWN_ADDRESS1(hi2c->Init.OwnAddress1));
|
|
assert_param(IS_I2C_ADDRESSING_MODE(hi2c->Init.AddressingMode));
|
|
assert_param(IS_I2C_DUAL_ADDRESS(hi2c->Init.DualAddressMode));
|
|
assert_param(IS_I2C_OWN_ADDRESS2(hi2c->Init.OwnAddress2));
|
|
assert_param(IS_I2C_GENERAL_CALL(hi2c->Init.GeneralCallMode));
|
|
assert_param(IS_I2C_NO_STRETCH(hi2c->Init.NoStretchMode));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_RESET)
|
|
{
|
|
/* Allocate lock resource and initialize it */
|
|
hi2c->Lock = HAL_UNLOCKED;
|
|
/* Init the low level hardware : GPIO, CLOCK, NVIC */
|
|
HAL_I2C_MspInit(hi2c);
|
|
}
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY;
|
|
|
|
/* Disable the selected I2C peripheral */
|
|
__HAL_I2C_DISABLE(hi2c);
|
|
|
|
/* Get PCLK1 frequency */
|
|
pclk1 = HAL_RCC_GetPCLK1Freq();
|
|
|
|
/* Calculate frequency range */
|
|
freqrange = I2C_FREQRANGE(pclk1);
|
|
|
|
/*---------------------------- I2Cx CR2 Configuration ----------------------*/
|
|
/* Configure I2Cx: Frequency range */
|
|
hi2c->Instance->CR2 = freqrange;
|
|
|
|
/*---------------------------- I2Cx TRISE Configuration --------------------*/
|
|
/* Configure I2Cx: Rise Time */
|
|
hi2c->Instance->TRISE = I2C_RISE_TIME(freqrange, hi2c->Init.ClockSpeed);
|
|
|
|
/*---------------------------- I2Cx CCR Configuration ----------------------*/
|
|
/* Configure I2Cx: Speed */
|
|
hi2c->Instance->CCR = I2C_SPEED(pclk1, hi2c->Init.ClockSpeed, hi2c->Init.DutyCycle);
|
|
|
|
/*---------------------------- I2Cx CR1 Configuration ----------------------*/
|
|
/* Configure I2Cx: Generalcall and NoStretch mode */
|
|
hi2c->Instance->CR1 = (hi2c->Init.GeneralCallMode | hi2c->Init.NoStretchMode);
|
|
|
|
/*---------------------------- I2Cx OAR1 Configuration ---------------------*/
|
|
/* Configure I2Cx: Own Address1 and addressing mode */
|
|
hi2c->Instance->OAR1 = (hi2c->Init.AddressingMode | hi2c->Init.OwnAddress1);
|
|
|
|
/*---------------------------- I2Cx OAR2 Configuration ---------------------*/
|
|
/* Configure I2Cx: Dual mode and Own Address2 */
|
|
hi2c->Instance->OAR2 = (hi2c->Init.DualAddressMode | hi2c->Init.OwnAddress2);
|
|
|
|
/* Enable the selected I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief DeInitializes the I2C peripheral.
|
|
* @param hi2c: pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_DeInit(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Check the I2C handle allocation */
|
|
if(hi2c == NULL)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY;
|
|
|
|
/* Disable the I2C Peripheral Clock */
|
|
__HAL_I2C_DISABLE(hi2c);
|
|
|
|
/* DeInit the low level hardware: GPIO, CLOCK, NVIC */
|
|
HAL_I2C_MspDeInit(hi2c);
|
|
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
hi2c->State = HAL_I2C_STATE_RESET;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Release Lock */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief I2C MSP Init.
|
|
* @param hi2c: pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
/* NOTE : This function Should not be modified, when the callback is needed,
|
|
the HAL_I2C_MspInit could be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @brief I2C MSP DeInit
|
|
* @param hi2c: pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
/* NOTE : This function Should not be modified, when the callback is needed,
|
|
the HAL_I2C_MspDeInit could be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup I2C_Exported_Functions_Group2 IO operation functions
|
|
* @brief Data transfers functions
|
|
*
|
|
@verbatim
|
|
===============================================================================
|
|
##### IO operation functions #####
|
|
===============================================================================
|
|
[..]
|
|
This subsection provides a set of functions allowing to manage the I2C data
|
|
transfers.
|
|
|
|
(#) There are two modes of transfer:
|
|
(++) Blocking mode : The communication is performed in the polling mode.
|
|
The status of all data processing is returned by the same function
|
|
after finishing transfer.
|
|
(++) No-Blocking mode : The communication is performed using Interrupts
|
|
or DMA. These functions return the status of the transfer startup.
|
|
The end of the data processing will be indicated through the
|
|
dedicated I2C IRQ when using Interrupt mode or the DMA IRQ when
|
|
using DMA mode.
|
|
|
|
(#) Blocking mode functions are :
|
|
(++) HAL_I2C_Master_Transmit()
|
|
(++) HAL_I2C_Master_Receive()
|
|
(++) HAL_I2C_Slave_Transmit()
|
|
(++) HAL_I2C_Slave_Receive()
|
|
(++) HAL_I2C_Mem_Write()
|
|
(++) HAL_I2C_Mem_Read()
|
|
(++) HAL_I2C_IsDeviceReady()
|
|
|
|
(#) No-Blocking mode functions with Interrupt are :
|
|
(++) HAL_I2C_Master_Transmit_IT()
|
|
(++) HAL_I2C_Master_Receive_IT()
|
|
(++) HAL_I2C_Slave_Transmit_IT()
|
|
(++) HAL_I2C_Slave_Receive_IT()
|
|
(++) HAL_I2C_Master_Sequential_Transmit_IT()
|
|
(++) HAL_I2C_Master_Sequential_Receive_IT()
|
|
(++) HAL_I2C_Slave_Sequential_Transmit_IT()
|
|
(++) HAL_I2C_Slave_Sequential_Receive_IT()
|
|
(++) HAL_I2C_Mem_Write_IT()
|
|
(++) HAL_I2C_Mem_Read_IT()
|
|
|
|
(#) No-Blocking mode functions with DMA are :
|
|
(++) HAL_I2C_Master_Transmit_DMA()
|
|
(++) HAL_I2C_Master_Receive_DMA()
|
|
(++) HAL_I2C_Slave_Transmit_DMA()
|
|
(++) HAL_I2C_Slave_Receive_DMA()
|
|
(++) HAL_I2C_Mem_Write_DMA()
|
|
(++) HAL_I2C_Mem_Read_DMA()
|
|
|
|
(#) A set of Transfer Complete Callbacks are provided in non Blocking mode:
|
|
(++) HAL_I2C_MemTxCpltCallback()
|
|
(++) HAL_I2C_MemRxCpltCallback()
|
|
(++) HAL_I2C_MasterTxCpltCallback()
|
|
(++) HAL_I2C_MasterRxCpltCallback()
|
|
(++) HAL_I2C_SlaveTxCpltCallback()
|
|
(++) HAL_I2C_SlaveRxCpltCallback()
|
|
(++) HAL_I2C_ErrorCallback()
|
|
(++) HAL_I2C_AbortCpltCallback()
|
|
|
|
@endverbatim
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Transmits in master mode an amount of data in blocking mode.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param Timeout Timeout duration
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Master_Transmit(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
|
|
{
|
|
uint32_t tickstart = 0x00U;
|
|
|
|
/* Init tickstart for timeout management*/
|
|
tickstart = HAL_GetTick();
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_MASTER;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Send Slave Address */
|
|
if(I2C_MasterRequestWrite(hi2c, DevAddress, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
while(hi2c->XferSize > 0U)
|
|
{
|
|
/* Wait until TXE flag is set */
|
|
if(I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferCount--;
|
|
hi2c->XferSize--;
|
|
|
|
if((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET) && (hi2c->XferSize != 0U))
|
|
{
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferCount--;
|
|
hi2c->XferSize--;
|
|
}
|
|
|
|
/* Wait until BTF flag is set */
|
|
if(I2C_WaitOnBTFFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Receives in master mode an amount of data in blocking mode.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param Timeout Timeout duration
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Master_Receive(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
|
|
{
|
|
uint32_t tickstart = 0x00U;
|
|
|
|
/* Init tickstart for timeout management*/
|
|
tickstart = HAL_GetTick();
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_MASTER;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Send Slave Address */
|
|
if(I2C_MasterRequestRead(hi2c, DevAddress, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
if(hi2c->XferSize == 0U)
|
|
{
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
}
|
|
else if(hi2c->XferSize == 1U)
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Disable all active IRQs around ADDR clearing and STOP programming because the EV6_3
|
|
software sequence must complete before the current byte end of transfer */
|
|
__disable_irq();
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Re-enable IRQs */
|
|
__enable_irq();
|
|
}
|
|
else if(hi2c->XferSize == 2U)
|
|
{
|
|
/* Enable Pos */
|
|
hi2c->Instance->CR1 |= I2C_CR1_POS;
|
|
|
|
/* Disable all active IRQs around ADDR clearing and STOP programming because the EV6_3
|
|
software sequence must complete before the current byte end of transfer */
|
|
__disable_irq();
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Re-enable IRQs */
|
|
__enable_irq();
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
}
|
|
|
|
while(hi2c->XferSize > 0U)
|
|
{
|
|
if(hi2c->XferSize <= 3U)
|
|
{
|
|
/* One byte */
|
|
if(hi2c->XferSize == 1U)
|
|
{
|
|
/* Wait until RXNE flag is set */
|
|
if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_TIMEOUT)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
else
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
/* Two bytes */
|
|
else if(hi2c->XferSize == 2U)
|
|
{
|
|
/* Wait until BTF flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Disable all active IRQs around ADDR clearing and STOP programming because the EV6_3
|
|
software sequence must complete before the current byte end of transfer */
|
|
__disable_irq();
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
/* Re-enable IRQs */
|
|
__enable_irq();
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
/* 3 Last bytes */
|
|
else
|
|
{
|
|
/* Wait until BTF flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Disable all active IRQs around ADDR clearing and STOP programming because the EV6_3
|
|
software sequence must complete before the current byte end of transfer */
|
|
__disable_irq();
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
/* Wait until BTF flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
/* Re-enable IRQs */
|
|
__enable_irq();
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Wait until RXNE flag is set */
|
|
if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_TIMEOUT)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
else
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
}
|
|
}
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Transmits in slave mode an amount of data in blocking mode.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param Timeout Timeout duration
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Transmit(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t Timeout)
|
|
{
|
|
uint32_t tickstart = 0x00U;
|
|
|
|
/* Init tickstart for timeout management*/
|
|
tickstart = HAL_GetTick();
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
if((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_SLAVE;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Enable Address Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Wait until ADDR flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* If 10bit addressing mode is selected */
|
|
if(hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_10BIT)
|
|
{
|
|
/* Wait until ADDR flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
}
|
|
|
|
while(hi2c->XferSize > 0U)
|
|
{
|
|
/* Wait until TXE flag is set */
|
|
if(I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
/* Disable Address Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferCount--;
|
|
hi2c->XferSize--;
|
|
|
|
if((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET) && (hi2c->XferSize != 0U))
|
|
{
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferCount--;
|
|
hi2c->XferSize--;
|
|
}
|
|
}
|
|
|
|
/* Wait until AF flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_AF, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Clear AF flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
|
|
|
|
/* Disable Address Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Receive in slave mode an amount of data in blocking mode
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param Timeout Timeout duration
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Receive(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t Timeout)
|
|
{
|
|
uint32_t tickstart = 0x00U;
|
|
|
|
/* Init tickstart for timeout management*/
|
|
tickstart = HAL_GetTick();
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
if((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_SLAVE;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Enable Address Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Wait until ADDR flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
while(hi2c->XferSize > 0U)
|
|
{
|
|
/* Wait until RXNE flag is set */
|
|
if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
/* Disable Address Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_TIMEOUT)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
else
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
if((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET) && (Size != 0U))
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
}
|
|
|
|
/* Wait until STOP flag is set */
|
|
if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
/* Disable Address Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Clear STOP flag */
|
|
__HAL_I2C_CLEAR_STOPFLAG(hi2c);
|
|
|
|
/* Disable Address Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Transmit in master mode an amount of data in non-blocking mode with Interrupt
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Master_Transmit_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_MASTER;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
hi2c->Devaddress = DevAddress;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Receive in master mode an amount of data in non-blocking mode with Interrupt
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Master_Receive_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_MASTER;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
hi2c->Devaddress = DevAddress;
|
|
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Sequential transmit in master mode an amount of data in non-blocking mode with Interrupt
|
|
* @note This interface allow to manage repeated start condition when a direction change during transfer
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param XferOptions Options of Transfer, value of @ref I2C_XferOptions_definition
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Master_Sequential_Transmit_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t XferOptions)
|
|
{
|
|
__IO uint32_t Prev_State = 0x00U;
|
|
__IO uint32_t count = 0x00U;
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_TRANSFER_OPTIONS_REQUEST(XferOptions));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Check Busy Flag only if FIRST call of Master interface */
|
|
if((XferOptions == I2C_FIRST_AND_LAST_FRAME) || (XferOptions == I2C_FIRST_FRAME))
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_MASTER;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = XferOptions;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
hi2c->Devaddress = DevAddress;
|
|
|
|
Prev_State = hi2c->PreviousState;
|
|
|
|
/* Generate Start */
|
|
if((Prev_State == I2C_STATE_MASTER_BUSY_RX) || (Prev_State == I2C_STATE_NONE))
|
|
{
|
|
/* Generate Start condition if first transfer */
|
|
if((XferOptions == I2C_FIRST_AND_LAST_FRAME) || (XferOptions == I2C_FIRST_FRAME))
|
|
{
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
}
|
|
else
|
|
{
|
|
/* Generate ReStart */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
}
|
|
}
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Sequential receive in master mode an amount of data in non-blocking mode with Interrupt
|
|
* @note This interface allow to manage repeated start condition when a direction change during transfer
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param XferOptions Options of Transfer, value of @ref I2C_XferOptions_definition
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Master_Sequential_Receive_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t XferOptions)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_TRANSFER_OPTIONS_REQUEST(XferOptions));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Check Busy Flag only if FIRST call of Master interface */
|
|
if((XferOptions == I2C_FIRST_AND_LAST_FRAME) || (XferOptions == I2C_FIRST_FRAME))
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_MASTER;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = XferOptions;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
hi2c->Devaddress = DevAddress;
|
|
|
|
if((hi2c->PreviousState == I2C_STATE_MASTER_BUSY_TX) || (hi2c->PreviousState == I2C_STATE_NONE))
|
|
{
|
|
/* Generate Start condition if first transfer */
|
|
if((XferOptions == I2C_FIRST_AND_LAST_FRAME) || (XferOptions == I2C_FIRST_FRAME) || (XferOptions == I2C_NO_OPTION_FRAME))
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate ReStart */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
}
|
|
}
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Transmit in slave mode an amount of data in non-blocking mode with Interrupt
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Transmit_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
if((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_SLAVE;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Enable Address Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Receive in slave mode an amount of data in non-blocking mode with Interrupt
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Receive_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
if((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_SLAVE;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferSize = Size;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
|
|
/* Enable Address Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Sequential transmit in slave mode an amount of data in no-blocking mode with Interrupt
|
|
* @note This interface allow to manage repeated start condition when a direction change during transfer
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param XferOptions Options of Transfer, value of @ref I2C_XferOptions_definition
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Sequential_Transmit_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t XferOptions)
|
|
{
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_TRANSFER_OPTIONS_REQUEST(XferOptions));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_LISTEN)
|
|
{
|
|
if((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX_LISTEN;
|
|
hi2c->Mode = HAL_I2C_MODE_SLAVE;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = XferOptions;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Sequential receive in slave mode an amount of data in non-blocking mode with Interrupt
|
|
* @note This interface allow to manage repeated start condition when a direction change during transfer
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param XferOptions Options of Transfer, value of @ref I2C_XferOptions_definition
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Sequential_Receive_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t XferOptions)
|
|
{
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_TRANSFER_OPTIONS_REQUEST(XferOptions));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_LISTEN)
|
|
{
|
|
if((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX_LISTEN;
|
|
hi2c->Mode = HAL_I2C_MODE_SLAVE;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = XferOptions;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Enable the Address listen mode with Interrupt.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_EnableListen_IT(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
hi2c->State = HAL_I2C_STATE_LISTEN;
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Enable Address Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Enable EVT and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Disable the Address listen mode with Interrupt.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_DisableListen_IT(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of tmp to prevent undefined behavior of volatile usage */
|
|
uint32_t tmp;
|
|
|
|
/* Disable Address listen mode only if a transfer is not ongoing */
|
|
if(hi2c->State == HAL_I2C_STATE_LISTEN)
|
|
{
|
|
tmp = (uint32_t)(hi2c->State) & I2C_STATE_MSK;
|
|
hi2c->PreviousState = tmp | (uint32_t)(hi2c->Mode);
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Disable Address Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Disable EVT and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Transmit in master mode an amount of data in non-blocking mode with DMA
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Master_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_MASTER;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
hi2c->Devaddress = DevAddress;
|
|
|
|
if(hi2c->XferSize > 0U)
|
|
{
|
|
/* Set the I2C DMA transfer complete callback */
|
|
hi2c->hdmatx->XferCpltCallback = I2C_DMAXferCplt;
|
|
|
|
/* Set the DMA error callback */
|
|
hi2c->hdmatx->XferErrorCallback = I2C_DMAError;
|
|
|
|
/* Set the unused DMA callbacks to NULL */
|
|
hi2c->hdmatx->XferHalfCpltCallback = NULL;
|
|
hi2c->hdmatx->XferAbortCallback = NULL;
|
|
|
|
/* Enable the DMA channel */
|
|
HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)hi2c->pBuffPtr, (uint32_t)&hi2c->Instance->DR, hi2c->XferSize);
|
|
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
|
|
|
|
/* Enable DMA Request */
|
|
hi2c->Instance->CR2 |= I2C_CR2_DMAEN;
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Receive in master mode an amount of data in non-blocking mode with DMA
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Master_Receive_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_MASTER;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
hi2c->Devaddress = DevAddress;
|
|
|
|
if(hi2c->XferSize > 0U)
|
|
{
|
|
/* Set the I2C DMA transfer complete callback */
|
|
hi2c->hdmarx->XferCpltCallback = I2C_DMAXferCplt;
|
|
|
|
/* Set the DMA error callback */
|
|
hi2c->hdmarx->XferErrorCallback = I2C_DMAError;
|
|
|
|
/* Set the unused DMA callbacks to NULL */
|
|
hi2c->hdmarx->XferHalfCpltCallback = NULL;
|
|
hi2c->hdmarx->XferAbortCallback = NULL;
|
|
|
|
/* Enable the DMA channel */
|
|
HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->DR, (uint32_t)hi2c->pBuffPtr, hi2c->XferSize);
|
|
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
|
|
|
|
/* Enable DMA Request */
|
|
hi2c->Instance->CR2 |= I2C_CR2_DMAEN;
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Abort a master I2C process communication with Interrupt.
|
|
* @note This abort can be called only if state is ready
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Master_Abort_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(DevAddress);
|
|
|
|
/* Abort Master transfer during Receive or Transmit process */
|
|
if(hi2c->Mode == HAL_I2C_MODE_MASTER)
|
|
{
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_ABORT;
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
hi2c->XferCount = 0U;
|
|
|
|
/* Disable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Call the corresponding callback to inform upper layer of End of Transfer */
|
|
I2C_ITError(hi2c);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
/* Wrong usage of abort function */
|
|
/* This function should be used only in case of abort monitored by master device */
|
|
return HAL_ERROR;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Transmit in slave mode an amount of data in non-blocking mode with DMA
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
if((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_SLAVE;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Set the I2C DMA transfer complete callback */
|
|
hi2c->hdmatx->XferCpltCallback = I2C_DMAXferCplt;
|
|
|
|
/* Set the DMA error callback */
|
|
hi2c->hdmatx->XferErrorCallback = I2C_DMAError;
|
|
|
|
/* Set the unused DMA callbacks to NULL */
|
|
hi2c->hdmatx->XferHalfCpltCallback = NULL;
|
|
hi2c->hdmatx->XferAbortCallback = NULL;
|
|
|
|
/* Enable the DMA channel */
|
|
HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)hi2c->pBuffPtr, (uint32_t)&hi2c->Instance->DR, hi2c->XferSize);
|
|
|
|
/* Enable Address Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
/* Enable EVT and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
|
|
|
|
/* Enable DMA Request */
|
|
hi2c->Instance->CR2 |= I2C_CR2_DMAEN;
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Receive in slave mode an amount of data in non-blocking mode with DMA
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Slave_Receive_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
if((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_SLAVE;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Set the I2C DMA transfer complete callback */
|
|
hi2c->hdmarx->XferCpltCallback = I2C_DMAXferCplt;
|
|
|
|
/* Set the DMA error callback */
|
|
hi2c->hdmarx->XferErrorCallback = I2C_DMAError;
|
|
|
|
/* Set the unused DMA callbacks to NULL */
|
|
hi2c->hdmarx->XferHalfCpltCallback = NULL;
|
|
hi2c->hdmarx->XferAbortCallback = NULL;
|
|
|
|
/* Enable the DMA channel */
|
|
HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->DR, (uint32_t)hi2c->pBuffPtr, hi2c->XferSize);
|
|
|
|
/* Enable Address Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
/* Enable EVT and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
|
|
|
|
/* Enable DMA Request */
|
|
hi2c->Instance->CR2 |= I2C_CR2_DMAEN;
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
/**
|
|
* @brief Write an amount of data in blocking mode to a specific memory address
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address
|
|
* @param MemAddress Internal memory address
|
|
* @param MemAddSize Size of internal memory address
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param Timeout Timeout duration
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout)
|
|
{
|
|
uint32_t tickstart = 0x00U;
|
|
|
|
/* Init tickstart for timeout management*/
|
|
tickstart = HAL_GetTick();
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_MEM;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Send Slave Address and Memory Address */
|
|
if(I2C_RequestMemoryWrite(hi2c, DevAddress, MemAddress, MemAddSize, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
while(hi2c->XferSize > 0U)
|
|
{
|
|
/* Wait until TXE flag is set */
|
|
if(I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
if((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET) && (hi2c->XferSize != 0U))
|
|
{
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
}
|
|
|
|
/* Wait until BTF flag is set */
|
|
if(I2C_WaitOnBTFFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Read an amount of data in blocking mode from a specific memory address
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address
|
|
* @param MemAddress Internal memory address
|
|
* @param MemAddSize Size of internal memory address
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @param Timeout Timeout duration
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Mem_Read(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout)
|
|
{
|
|
uint32_t tickstart = 0x00U;
|
|
|
|
/* Init tickstart for timeout management*/
|
|
tickstart = HAL_GetTick();
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_MEM;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
/* Send Slave Address and Memory Address */
|
|
if(I2C_RequestMemoryRead(hi2c, DevAddress, MemAddress, MemAddSize, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
if(hi2c->XferSize == 0U)
|
|
{
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
}
|
|
else if(hi2c->XferSize == 1U)
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Disable all active IRQs around ADDR clearing and STOP programming because the EV6_3
|
|
software sequence must complete before the current byte end of transfer */
|
|
__disable_irq();
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Re-enable IRQs */
|
|
__enable_irq();
|
|
}
|
|
else if(hi2c->XferSize == 2U)
|
|
{
|
|
/* Enable Pos */
|
|
hi2c->Instance->CR1 |= I2C_CR1_POS;
|
|
|
|
/* Disable all active IRQs around ADDR clearing and STOP programming because the EV6_3
|
|
software sequence must complete before the current byte end of transfer */
|
|
__disable_irq();
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Re-enable IRQs */
|
|
__enable_irq();
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
SET_BIT(hi2c->Instance->CR1, I2C_CR1_ACK);
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
}
|
|
|
|
while(hi2c->XferSize > 0U)
|
|
{
|
|
if(hi2c->XferSize <= 3U)
|
|
{
|
|
/* One byte */
|
|
if(hi2c->XferSize== 1U)
|
|
{
|
|
/* Wait until RXNE flag is set */
|
|
if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_TIMEOUT)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
else
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
/* Two bytes */
|
|
else if(hi2c->XferSize == 2U)
|
|
{
|
|
/* Wait until BTF flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Disable all active IRQs around ADDR clearing and STOP programming because the EV6_3
|
|
software sequence must complete before the current byte end of transfer */
|
|
__disable_irq();
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
/* Re-enable IRQs */
|
|
__enable_irq();
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
/* 3 Last bytes */
|
|
else
|
|
{
|
|
/* Wait until BTF flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Disable all active IRQs around ADDR clearing and STOP programming because the EV6_3
|
|
software sequence must complete before the current byte end of transfer */
|
|
__disable_irq();
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
/* Wait until BTF flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
/* Re-enable IRQs */
|
|
__enable_irq();
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Wait until RXNE flag is set */
|
|
if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_TIMEOUT)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
else
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferSize--;
|
|
hi2c->XferCount--;
|
|
}
|
|
}
|
|
}
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Write an amount of data in non-blocking mode with Interrupt to a specific memory address
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address
|
|
* @param MemAddress Internal memory address
|
|
* @param MemAddSize Size of internal memory address
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Mem_Write_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_MEM;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferSize = Size;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->Devaddress = DevAddress;
|
|
hi2c->Memaddress = MemAddress;
|
|
hi2c->MemaddSize = MemAddSize;
|
|
hi2c->EventCount = 0U;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Read an amount of data in non-blocking mode with Interrupt from a specific memory address
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address
|
|
* @param MemAddress Internal memory address
|
|
* @param MemAddSize Size of internal memory address
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Mem_Read_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_MEM;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferSize = Size;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->Devaddress = DevAddress;
|
|
hi2c->Memaddress = MemAddress;
|
|
hi2c->MemaddSize = MemAddSize;
|
|
hi2c->EventCount = 0U;
|
|
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
if(hi2c->XferSize > 0U)
|
|
{
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
|
|
/* Enable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Write an amount of data in non-blocking mode with DMA to a specific memory address
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address
|
|
* @param MemAddress Internal memory address
|
|
* @param MemAddSize Size of internal memory address
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be sent
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Mem_Write_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
|
|
{
|
|
__IO uint32_t count = 0U;
|
|
|
|
uint32_t tickstart = 0x00U;
|
|
|
|
/* Init tickstart for timeout management*/
|
|
tickstart = HAL_GetTick();
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_MEM;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferSize = Size;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
|
|
if(hi2c->XferSize > 0U)
|
|
{
|
|
/* Set the I2C DMA transfer complete callback */
|
|
hi2c->hdmatx->XferCpltCallback = I2C_DMAXferCplt;
|
|
|
|
/* Set the DMA error callback */
|
|
hi2c->hdmatx->XferErrorCallback = I2C_DMAError;
|
|
|
|
/* Set the unused DMA callbacks to NULL */
|
|
hi2c->hdmatx->XferHalfCpltCallback = NULL;
|
|
hi2c->hdmatx->XferAbortCallback = NULL;
|
|
|
|
/* Enable the DMA channel */
|
|
HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)hi2c->pBuffPtr, (uint32_t)&hi2c->Instance->DR, hi2c->XferSize);
|
|
|
|
/* Send Slave Address and Memory Address */
|
|
if(I2C_RequestMemoryWrite(hi2c, DevAddress, MemAddress, MemAddSize, I2C_TIMEOUT_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
/* Enable ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_ERR);
|
|
|
|
/* Enable DMA Request */
|
|
hi2c->Instance->CR2 |= I2C_CR2_DMAEN;
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Reads an amount of data in non-blocking mode with DMA from a specific memory address.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address
|
|
* @param MemAddress Internal memory address
|
|
* @param MemAddSize Size of internal memory address
|
|
* @param pData Pointer to data buffer
|
|
* @param Size Amount of data to be read
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_Mem_Read_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
|
|
{
|
|
uint32_t tickstart = 0x00U;
|
|
__IO uint32_t count = 0U;
|
|
|
|
/* Init tickstart for timeout management*/
|
|
tickstart = HAL_GetTick();
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
count = I2C_TIMEOUT_BUSY_FLAG * (SystemCoreClock /25U /1000U);
|
|
do
|
|
{
|
|
if(count-- == 0U)
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) != RESET);
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY_RX;
|
|
hi2c->Mode = HAL_I2C_MODE_MEM;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Prepare transfer parameters */
|
|
hi2c->pBuffPtr = pData;
|
|
hi2c->XferCount = Size;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->XferSize = hi2c->XferCount;
|
|
|
|
if(hi2c->XferSize > 0U)
|
|
{
|
|
/* Set the I2C DMA transfer complete callback */
|
|
hi2c->hdmarx->XferCpltCallback = I2C_DMAXferCplt;
|
|
|
|
/* Set the DMA error callback */
|
|
hi2c->hdmarx->XferErrorCallback = I2C_DMAError;
|
|
|
|
/* Set the unused DMA callbacks to NULL */
|
|
hi2c->hdmarx->XferAbortCallback = NULL;
|
|
|
|
/* Enable the DMA channel */
|
|
HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->DR, (uint32_t)hi2c->pBuffPtr, hi2c->XferSize);
|
|
|
|
/* Send Slave Address and Memory Address */
|
|
if(I2C_RequestMemoryRead(hi2c, DevAddress, MemAddress, MemAddSize, I2C_TIMEOUT_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
if(Size == 1U)
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
}
|
|
else
|
|
{
|
|
/* Enable Last DMA bit */
|
|
hi2c->Instance->CR2 |= I2C_CR2_LAST;
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
/* Note : The I2C interrupts must be enabled after unlocking current process
|
|
to avoid the risk of I2C interrupt handle execution before current
|
|
process unlock */
|
|
/* Enable ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_ERR);
|
|
|
|
/* Enable DMA Request */
|
|
hi2c->Instance->CR2 |= I2C_CR2_DMAEN;
|
|
}
|
|
else
|
|
{
|
|
/* Send Slave Address and Memory Address */
|
|
if(I2C_RequestMemoryRead(hi2c, DevAddress, MemAddress, MemAddSize, I2C_TIMEOUT_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Checks if target device is ready for communication.
|
|
* @note This function is used with Memory devices
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param DevAddress Target device address
|
|
* @param Trials Number of trials
|
|
* @param Timeout Timeout duration
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_I2C_IsDeviceReady(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Trials, uint32_t Timeout)
|
|
{
|
|
uint32_t tickstart = 0U, tmp1 = 0U, tmp2 = 0U, tmp3 = 0U, I2C_Trials = 1U;
|
|
|
|
/* Get tick */
|
|
tickstart = HAL_GetTick();
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_READY)
|
|
{
|
|
/* Wait until BUSY flag is reset */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
|
|
/* Process Locked */
|
|
__HAL_LOCK(hi2c);
|
|
|
|
/* Check if the I2C is already enabled */
|
|
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
|
|
{
|
|
/* Enable I2C peripheral */
|
|
__HAL_I2C_ENABLE(hi2c);
|
|
}
|
|
|
|
/* Disable Pos */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
hi2c->State = HAL_I2C_STATE_BUSY;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
|
|
do
|
|
{
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Wait until SB flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_SB, RESET, Timeout, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_WRITE(DevAddress);
|
|
|
|
/* Wait until ADDR or AF flag are set */
|
|
/* Get tick */
|
|
tickstart = HAL_GetTick();
|
|
|
|
tmp1 = __HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_ADDR);
|
|
tmp2 = __HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF);
|
|
tmp3 = hi2c->State;
|
|
while((tmp1 == RESET) && (tmp2 == RESET) && (tmp3 != HAL_I2C_STATE_TIMEOUT))
|
|
{
|
|
if((Timeout == 0U)||((HAL_GetTick() - tickstart ) > Timeout))
|
|
{
|
|
hi2c->State = HAL_I2C_STATE_TIMEOUT;
|
|
}
|
|
tmp1 = __HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_ADDR);
|
|
tmp2 = __HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF);
|
|
tmp3 = hi2c->State;
|
|
}
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
/* Check if the ADDR flag has been set */
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_ADDR) == SET)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Clear ADDR Flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Wait until BUSY flag is reset */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Clear AF Flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
|
|
|
|
/* Wait until BUSY flag is reset */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
}while(I2C_Trials++ < Trials);
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles I2C event interrupt request.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
void HAL_I2C_EV_IRQHandler(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
uint32_t sr2itflags = READ_REG(hi2c->Instance->SR2);
|
|
uint32_t sr1itflags = READ_REG(hi2c->Instance->SR1);
|
|
uint32_t itsources = READ_REG(hi2c->Instance->CR2);
|
|
|
|
uint32_t CurrentMode = hi2c->Mode;
|
|
|
|
/* Master or Memory mode selected */
|
|
if((CurrentMode == HAL_I2C_MODE_MASTER) || (CurrentMode == HAL_I2C_MODE_MEM))
|
|
{
|
|
/* SB Set ----------------------------------------------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_SB) != RESET) && ((itsources & I2C_IT_EVT) != RESET))
|
|
{
|
|
I2C_Master_SB(hi2c);
|
|
}
|
|
/* ADD10 Set -------------------------------------------------------------*/
|
|
else if(((sr1itflags & I2C_FLAG_ADD10) != RESET) && ((itsources & I2C_IT_EVT) != RESET))
|
|
{
|
|
I2C_Master_ADD10(hi2c);
|
|
}
|
|
/* ADDR Set --------------------------------------------------------------*/
|
|
else if(((sr1itflags & I2C_FLAG_ADDR) != RESET) && ((itsources & I2C_IT_EVT) != RESET))
|
|
{
|
|
I2C_Master_ADDR(hi2c);
|
|
}
|
|
|
|
/* I2C in mode Transmitter -----------------------------------------------*/
|
|
if((sr2itflags & I2C_FLAG_TRA) != RESET)
|
|
{
|
|
/* TXE set and BTF reset -----------------------------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_TXE) != RESET) && ((itsources & I2C_IT_BUF) != RESET) && ((sr1itflags & I2C_FLAG_BTF) == RESET))
|
|
{
|
|
I2C_MasterTransmit_TXE(hi2c);
|
|
}
|
|
/* BTF set -------------------------------------------------------------*/
|
|
else if(((sr1itflags & I2C_FLAG_BTF) != RESET) && ((itsources & I2C_IT_EVT) != RESET))
|
|
{
|
|
I2C_MasterTransmit_BTF(hi2c);
|
|
}
|
|
}
|
|
/* I2C in mode Receiver --------------------------------------------------*/
|
|
else
|
|
{
|
|
/* RXNE set and BTF reset -----------------------------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_RXNE) != RESET) && ((itsources & I2C_IT_BUF) != RESET) && ((sr1itflags & I2C_FLAG_BTF) == RESET))
|
|
{
|
|
I2C_MasterReceive_RXNE(hi2c);
|
|
}
|
|
/* BTF set -------------------------------------------------------------*/
|
|
else if(((sr1itflags & I2C_FLAG_BTF) != RESET) && ((itsources & I2C_IT_EVT) != RESET))
|
|
{
|
|
I2C_MasterReceive_BTF(hi2c);
|
|
}
|
|
}
|
|
}
|
|
/* Slave mode selected */
|
|
else
|
|
{
|
|
/* ADDR set --------------------------------------------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_ADDR) != RESET) && ((itsources & I2C_IT_EVT) != RESET))
|
|
{
|
|
I2C_Slave_ADDR(hi2c);
|
|
}
|
|
/* STOPF set --------------------------------------------------------------*/
|
|
else if(((sr1itflags & I2C_FLAG_STOPF) != RESET) && ((itsources & I2C_IT_EVT) != RESET))
|
|
{
|
|
I2C_Slave_STOPF(hi2c);
|
|
}
|
|
/* I2C in mode Transmitter -----------------------------------------------*/
|
|
else if((sr2itflags & I2C_FLAG_TRA) != RESET)
|
|
{
|
|
/* TXE set and BTF reset -----------------------------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_TXE) != RESET) && ((itsources & I2C_IT_BUF) != RESET) && ((sr1itflags & I2C_FLAG_BTF) == RESET))
|
|
{
|
|
I2C_SlaveTransmit_TXE(hi2c);
|
|
}
|
|
/* BTF set -------------------------------------------------------------*/
|
|
else if(((sr1itflags & I2C_FLAG_BTF) != RESET) && ((itsources & I2C_IT_EVT) != RESET))
|
|
{
|
|
I2C_SlaveTransmit_BTF(hi2c);
|
|
}
|
|
}
|
|
/* I2C in mode Receiver --------------------------------------------------*/
|
|
else
|
|
{
|
|
/* RXNE set and BTF reset ----------------------------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_RXNE) != RESET) && ((itsources & I2C_IT_BUF) != RESET) && ((sr1itflags & I2C_FLAG_BTF) == RESET))
|
|
{
|
|
I2C_SlaveReceive_RXNE(hi2c);
|
|
}
|
|
/* BTF set -------------------------------------------------------------*/
|
|
else if(((sr1itflags & I2C_FLAG_BTF) != RESET) && ((itsources & I2C_IT_EVT) != RESET))
|
|
{
|
|
I2C_SlaveReceive_BTF(hi2c);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles I2C error interrupt request.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
void HAL_I2C_ER_IRQHandler(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
uint32_t tmp1 = 0U, tmp2 = 0U, tmp3 = 0U, tmp4 = 0U;
|
|
uint32_t sr1itflags = READ_REG(hi2c->Instance->SR1);
|
|
uint32_t itsources = READ_REG(hi2c->Instance->CR2);
|
|
|
|
/* I2C Bus error interrupt occurred ----------------------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_BERR) != RESET) && ((itsources & I2C_IT_ERR) != RESET))
|
|
{
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_BERR;
|
|
|
|
/* Clear BERR flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_BERR);
|
|
|
|
/* Workaround: Start cannot be generated after a misplaced Stop */
|
|
SET_BIT(hi2c->Instance->CR1, I2C_CR1_SWRST);
|
|
}
|
|
|
|
/* I2C Arbitration Loss error interrupt occurred ---------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_ARLO) != RESET) && ((itsources & I2C_IT_ERR) != RESET))
|
|
{
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_ARLO;
|
|
|
|
/* Clear ARLO flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_ARLO);
|
|
}
|
|
|
|
/* I2C Acknowledge failure error interrupt occurred ------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_AF) != RESET) && ((itsources & I2C_IT_ERR) != RESET))
|
|
{
|
|
tmp1 = hi2c->Mode;
|
|
tmp2 = hi2c->XferCount;
|
|
tmp3 = hi2c->State;
|
|
tmp4 = hi2c->PreviousState;
|
|
if((tmp1 == HAL_I2C_MODE_SLAVE) && (tmp2 == 0U) && \
|
|
((tmp3 == HAL_I2C_STATE_BUSY_TX) || (tmp3 == HAL_I2C_STATE_BUSY_TX_LISTEN) || \
|
|
((tmp3 == HAL_I2C_STATE_LISTEN) && (tmp4 == I2C_STATE_SLAVE_BUSY_TX))))
|
|
{
|
|
I2C_Slave_AF(hi2c);
|
|
}
|
|
else
|
|
{
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
|
|
|
|
/* Do not generate a STOP in case of Slave receive non acknowledge during transfer (mean not at the end of transfer) */
|
|
if(hi2c->Mode == HAL_I2C_MODE_MASTER)
|
|
{
|
|
/* Generate Stop */
|
|
SET_BIT(hi2c->Instance->CR1,I2C_CR1_STOP);
|
|
}
|
|
|
|
/* Clear AF flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
|
|
}
|
|
}
|
|
|
|
/* I2C Over-Run/Under-Run interrupt occurred -------------------------------*/
|
|
if(((sr1itflags & I2C_FLAG_OVR) != RESET) && ((itsources & I2C_IT_ERR) != RESET))
|
|
{
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_OVR;
|
|
/* Clear OVR flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_OVR);
|
|
}
|
|
|
|
/* Call the Error Callback in case of Error detected -----------------------*/
|
|
if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
|
|
{
|
|
I2C_ITError(hi2c);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Master Tx Transfer completed callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_MasterTxCpltCallback(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_MasterTxCpltCallback can be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @brief Master Rx Transfer completed callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_MasterRxCpltCallback(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_MasterRxCpltCallback can be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/** @brief Slave Tx Transfer completed callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_SlaveTxCpltCallback can be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @brief Slave Rx Transfer completed callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_SlaveRxCpltCallback can be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @brief Slave Address Match callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param TransferDirection Master request Transfer Direction (Write/Read), value of @ref I2C_XferOptions_definition
|
|
* @param AddrMatchCode Address Match Code
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
UNUSED(TransferDirection);
|
|
UNUSED(AddrMatchCode);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_AddrCallback can be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @brief Listen Complete callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_ListenCpltCallback(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_ListenCpltCallback can be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @brief Memory Tx Transfer completed callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_MemTxCpltCallback(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_MemTxCpltCallback can be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @brief Memory Rx Transfer completed callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_MemRxCpltCallback(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_MemRxCpltCallback can be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @brief I2C error callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_ErrorCallback can be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @brief I2C abort callback.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval None
|
|
*/
|
|
__weak void HAL_I2C_AbortCpltCallback(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Prevent unused argument(s) compilation warning */
|
|
UNUSED(hi2c);
|
|
|
|
/* NOTE : This function should not be modified, when the callback is needed,
|
|
the HAL_I2C_AbortCpltCallback could be implemented in the user file
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup I2C_Exported_Functions_Group3 Peripheral State, Mode and Error functions
|
|
* @brief Peripheral State and Errors functions
|
|
*
|
|
@verbatim
|
|
===============================================================================
|
|
##### Peripheral State, Mode and Error functions #####
|
|
===============================================================================
|
|
[..]
|
|
This subsection permits to get in run-time the status of the peripheral
|
|
and the data flow.
|
|
|
|
@endverbatim
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Return the I2C handle state.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval HAL state
|
|
*/
|
|
HAL_I2C_StateTypeDef HAL_I2C_GetState(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Return I2C handle state */
|
|
return hi2c->State;
|
|
}
|
|
|
|
/**
|
|
* @brief Return the I2C Master, Slave, Memory or no mode.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL mode
|
|
*/
|
|
HAL_I2C_ModeTypeDef HAL_I2C_GetMode(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
return hi2c->Mode;
|
|
}
|
|
|
|
/**
|
|
* @brief Return the I2C error code
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval I2C Error Code
|
|
*/
|
|
uint32_t HAL_I2C_GetError(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
return hi2c->ErrorCode;
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @brief Handle TXE flag for Master
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_MasterTransmit_TXE(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of temporary variables to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentState = hi2c->State;
|
|
uint32_t CurrentMode = hi2c->Mode;
|
|
uint32_t CurrentXferOptions = hi2c->XferOptions;
|
|
|
|
if((hi2c->XferSize == 0U) && (CurrentState == HAL_I2C_STATE_BUSY_TX))
|
|
{
|
|
/* Call TxCpltCallback() directly if no stop mode is set */
|
|
if((CurrentXferOptions != I2C_FIRST_AND_LAST_FRAME) && (CurrentXferOptions != I2C_LAST_FRAME) && (CurrentXferOptions != I2C_NO_OPTION_FRAME))
|
|
{
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
hi2c->PreviousState = I2C_STATE_MASTER_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
HAL_I2C_MasterTxCpltCallback(hi2c);
|
|
}
|
|
else /* Generate Stop condition then Call TxCpltCallback() */
|
|
{
|
|
/* Disable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
if(hi2c->Mode == HAL_I2C_MODE_MEM)
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
HAL_I2C_MemTxCpltCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
HAL_I2C_MasterTxCpltCallback(hi2c);
|
|
}
|
|
}
|
|
}
|
|
else if((CurrentState == HAL_I2C_STATE_BUSY_TX) || \
|
|
((CurrentMode == HAL_I2C_MODE_MEM) && (CurrentState == HAL_I2C_STATE_BUSY_RX)))
|
|
{
|
|
if(hi2c->XferCount == 0U)
|
|
{
|
|
/* Disable BUF interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_BUF);
|
|
}
|
|
else
|
|
{
|
|
if(hi2c->Mode == HAL_I2C_MODE_MEM)
|
|
{
|
|
if(hi2c->EventCount == 0)
|
|
{
|
|
/* If Memory address size is 8Bit */
|
|
if(hi2c->MemaddSize == I2C_MEMADD_SIZE_8BIT)
|
|
{
|
|
/* Send Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(hi2c->Memaddress);
|
|
|
|
hi2c->EventCount += 2;
|
|
}
|
|
/* If Memory address size is 16Bit */
|
|
else
|
|
{
|
|
/* Send MSB of Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_MSB(hi2c->Memaddress);
|
|
|
|
hi2c->EventCount++;
|
|
}
|
|
}
|
|
else if(hi2c->EventCount == 1)
|
|
{
|
|
/* Send LSB of Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(hi2c->Memaddress);
|
|
|
|
hi2c->EventCount++;
|
|
}
|
|
else if(hi2c->EventCount == 2)
|
|
{
|
|
if(hi2c->State == HAL_I2C_STATE_BUSY_RX)
|
|
{
|
|
/* Generate Restart */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
}
|
|
else if(hi2c->State == HAL_I2C_STATE_BUSY_TX)
|
|
{
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferCount--;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferCount--;
|
|
}
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle BTF flag for Master transmitter
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_MasterTransmit_BTF(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of temporary variables to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentXferOptions = hi2c->XferOptions;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_BUSY_TX)
|
|
{
|
|
if(hi2c->XferCount != 0U)
|
|
{
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferCount--;
|
|
}
|
|
else
|
|
{
|
|
/* Call TxCpltCallback() directly if no stop mode is set */
|
|
if((CurrentXferOptions != I2C_FIRST_AND_LAST_FRAME) && (CurrentXferOptions != I2C_LAST_FRAME) && (CurrentXferOptions != I2C_NO_OPTION_FRAME))
|
|
{
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
hi2c->PreviousState = I2C_STATE_MASTER_BUSY_TX;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
HAL_I2C_MasterTxCpltCallback(hi2c);
|
|
}
|
|
else /* Generate Stop condition then Call TxCpltCallback() */
|
|
{
|
|
/* Disable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
if(hi2c->Mode == HAL_I2C_MODE_MEM)
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
HAL_I2C_MemTxCpltCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
HAL_I2C_MasterTxCpltCallback(hi2c);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle RXNE flag for Master
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_MasterReceive_RXNE(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
if(hi2c->State == HAL_I2C_STATE_BUSY_RX)
|
|
{
|
|
uint32_t tmp = 0U;
|
|
|
|
tmp = hi2c->XferCount;
|
|
if(tmp > 3U)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
}
|
|
else if((tmp == 2U) || (tmp == 3U))
|
|
{
|
|
if(hi2c->XferOptions != I2C_NEXT_FRAME)
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Enable Pos */
|
|
hi2c->Instance->CR1 |= I2C_CR1_POS;
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
}
|
|
|
|
/* Disable BUF interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_BUF);
|
|
}
|
|
else
|
|
{
|
|
if(hi2c->XferOptions != I2C_NEXT_FRAME)
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
}
|
|
|
|
/* Disable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
|
|
if(hi2c->Mode == HAL_I2C_MODE_MEM)
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
HAL_I2C_MemRxCpltCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
HAL_I2C_MasterRxCpltCallback(hi2c);
|
|
}
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle BTF flag for Master receiver
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_MasterReceive_BTF(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of temporary variables to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentXferOptions = hi2c->XferOptions;
|
|
|
|
if(hi2c->XferCount == 3U)
|
|
{
|
|
if((CurrentXferOptions == I2C_FIRST_AND_LAST_FRAME) || (CurrentXferOptions == I2C_LAST_FRAME) || (CurrentXferOptions == I2C_NO_OPTION_FRAME))
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
}
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
}
|
|
else if(hi2c->XferCount == 2U)
|
|
{
|
|
/* Prepare next transfer or stop current transfer */
|
|
if((CurrentXferOptions != I2C_FIRST_AND_LAST_FRAME) && (CurrentXferOptions != I2C_LAST_FRAME) && (CurrentXferOptions != I2C_NO_OPTION_FRAME))
|
|
{
|
|
if(CurrentXferOptions != I2C_NEXT_FRAME)
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
}
|
|
|
|
/* Disable EVT and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
|
|
}
|
|
else
|
|
{
|
|
/* Disable EVT and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
}
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
|
|
if(hi2c->Mode == HAL_I2C_MODE_MEM)
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
HAL_I2C_MemRxCpltCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
HAL_I2C_MasterRxCpltCallback(hi2c);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle SB flag for Master
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_Master_SB(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
if(hi2c->Mode == HAL_I2C_MODE_MEM)
|
|
{
|
|
if(hi2c->EventCount == 0U)
|
|
{
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_WRITE(hi2c->Devaddress);
|
|
}
|
|
else
|
|
{
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_READ(hi2c->Devaddress);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_7BIT)
|
|
{
|
|
/* Send slave 7 Bits address */
|
|
if(hi2c->State == HAL_I2C_STATE_BUSY_TX)
|
|
{
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_WRITE(hi2c->Devaddress);
|
|
}
|
|
else
|
|
{
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_READ(hi2c->Devaddress);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(hi2c->EventCount == 0U)
|
|
{
|
|
/* Send header of slave address */
|
|
hi2c->Instance->DR = I2C_10BIT_HEADER_WRITE(hi2c->Devaddress);
|
|
}
|
|
else if(hi2c->EventCount == 1U)
|
|
{
|
|
/* Send header of slave address */
|
|
hi2c->Instance->DR = I2C_10BIT_HEADER_READ(hi2c->Devaddress);
|
|
}
|
|
}
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle ADD10 flag for Master
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_Master_ADD10(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_10BIT_ADDRESS(hi2c->Devaddress);
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle ADDR flag for Master
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_Master_ADDR(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of temporary variable to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentMode = hi2c->Mode;
|
|
uint32_t CurrentXferOptions = hi2c->XferOptions;
|
|
uint32_t Prev_State = hi2c->PreviousState;
|
|
|
|
if(hi2c->State == HAL_I2C_STATE_BUSY_RX)
|
|
{
|
|
if((hi2c->EventCount == 0U) && (CurrentMode == HAL_I2C_MODE_MEM))
|
|
{
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
}
|
|
else if((hi2c->EventCount == 0U) && (hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_10BIT))
|
|
{
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Restart */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
hi2c->EventCount++;
|
|
}
|
|
else
|
|
{
|
|
if(hi2c->XferCount == 0U)
|
|
{
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
}
|
|
else if(hi2c->XferCount == 1U)
|
|
{
|
|
if(CurrentXferOptions == I2C_NO_OPTION_FRAME)
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
if((hi2c->Instance->CR2 & I2C_CR2_DMAEN) == I2C_CR2_DMAEN)
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
}
|
|
else
|
|
{
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
}
|
|
}
|
|
/* Prepare next transfer or stop current transfer */
|
|
else if((CurrentXferOptions != I2C_FIRST_AND_LAST_FRAME) && (CurrentXferOptions != I2C_LAST_FRAME) \
|
|
&& (Prev_State != I2C_STATE_MASTER_BUSY_RX))
|
|
{
|
|
if(hi2c->XferOptions != I2C_NEXT_FRAME)
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
}
|
|
else
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
}
|
|
}
|
|
else if(hi2c->XferCount == 2U)
|
|
{
|
|
if(hi2c->XferOptions != I2C_NEXT_FRAME)
|
|
{
|
|
/* Enable Pos */
|
|
hi2c->Instance->CR1 |= I2C_CR1_POS;
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
}
|
|
|
|
if((hi2c->Instance->CR2 & I2C_CR2_DMAEN) == I2C_CR2_DMAEN)
|
|
{
|
|
/* Enable Last DMA bit */
|
|
hi2c->Instance->CR2 |= I2C_CR2_LAST;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
if((hi2c->Instance->CR2 & I2C_CR2_DMAEN) == I2C_CR2_DMAEN)
|
|
{
|
|
/* Enable Last DMA bit */
|
|
hi2c->Instance->CR2 |= I2C_CR2_LAST;
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
}
|
|
|
|
/* Reset Event counter */
|
|
hi2c->EventCount = 0U;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle TXE flag for Slave
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_SlaveTransmit_TXE(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of temporary variables to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentState = hi2c->State;
|
|
|
|
if(hi2c->XferCount != 0U)
|
|
{
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferCount--;
|
|
|
|
if((hi2c->XferCount == 0U) && (CurrentState == HAL_I2C_STATE_BUSY_TX_LISTEN))
|
|
{
|
|
/* Last Byte is received, disable Interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_BUF);
|
|
|
|
/* Set state at HAL_I2C_STATE_LISTEN */
|
|
hi2c->PreviousState = I2C_STATE_SLAVE_BUSY_TX;
|
|
hi2c->State = HAL_I2C_STATE_LISTEN;
|
|
|
|
/* Call the Tx complete callback to inform upper layer of the end of receive process */
|
|
HAL_I2C_SlaveTxCpltCallback(hi2c);
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle BTF flag for Slave transmitter
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_SlaveTransmit_BTF(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
if(hi2c->XferCount != 0U)
|
|
{
|
|
/* Write data to DR */
|
|
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
|
|
hi2c->XferCount--;
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle RXNE flag for Slave
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_SlaveReceive_RXNE(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of temporary variables to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentState = hi2c->State;
|
|
|
|
if(hi2c->XferCount != 0U)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
|
|
if((hi2c->XferCount == 0U) && (CurrentState == HAL_I2C_STATE_BUSY_RX_LISTEN))
|
|
{
|
|
/* Last Byte is received, disable Interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_BUF);
|
|
|
|
/* Set state at HAL_I2C_STATE_LISTEN */
|
|
hi2c->PreviousState = I2C_STATE_SLAVE_BUSY_RX;
|
|
hi2c->State = HAL_I2C_STATE_LISTEN;
|
|
|
|
/* Call the Rx complete callback to inform upper layer of the end of receive process */
|
|
HAL_I2C_SlaveRxCpltCallback(hi2c);
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle BTF flag for Slave receiver
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_SlaveReceive_BTF(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
if(hi2c->XferCount != 0U)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle ADD flag for Slave
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_Slave_ADDR(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
uint8_t TransferDirection = I2C_DIRECTION_RECEIVE;
|
|
uint16_t SlaveAddrCode = 0U;
|
|
|
|
/* Transfer Direction requested by Master */
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TRA) == RESET)
|
|
{
|
|
TransferDirection = I2C_DIRECTION_TRANSMIT;
|
|
}
|
|
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_DUALF) == RESET)
|
|
{
|
|
SlaveAddrCode = hi2c->Init.OwnAddress1;
|
|
}
|
|
else
|
|
{
|
|
SlaveAddrCode = hi2c->Init.OwnAddress2;
|
|
}
|
|
|
|
/* Call Slave Addr callback */
|
|
HAL_I2C_AddrCallback(hi2c, TransferDirection, SlaveAddrCode);
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Handle STOPF flag for Slave
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_Slave_STOPF(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of temporary variable to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentState = hi2c->State;
|
|
|
|
/* Disable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
/* Clear STOPF flag */
|
|
__HAL_I2C_CLEAR_STOPFLAG(hi2c);
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* If a DMA is ongoing, Update handle size context */
|
|
if((hi2c->Instance->CR2 & I2C_CR2_DMAEN) == I2C_CR2_DMAEN)
|
|
{
|
|
if((hi2c->State == HAL_I2C_STATE_BUSY_RX) || (hi2c->State == HAL_I2C_STATE_BUSY_RX_LISTEN))
|
|
{
|
|
hi2c->XferCount = __HAL_DMA_GET_COUNTER(hi2c->hdmarx);
|
|
}
|
|
else
|
|
{
|
|
hi2c->XferCount = __HAL_DMA_GET_COUNTER(hi2c->hdmatx);
|
|
}
|
|
}
|
|
|
|
/* All data are not transferred, so set error code accordingly */
|
|
if(hi2c->XferCount != 0U)
|
|
{
|
|
/* Store Last receive data if any */
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
}
|
|
|
|
/* Store Last receive data if any */
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) == SET)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
hi2c->XferCount--;
|
|
}
|
|
|
|
/* Set ErrorCode corresponding to a Non-Acknowledge */
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
|
|
}
|
|
|
|
if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
|
|
{
|
|
/* Call the corresponding callback to inform upper layer of End of Transfer */
|
|
I2C_ITError(hi2c);
|
|
}
|
|
else
|
|
{
|
|
if((CurrentState == HAL_I2C_STATE_LISTEN ) || (CurrentState == HAL_I2C_STATE_BUSY_RX_LISTEN) || \
|
|
(CurrentState == HAL_I2C_STATE_BUSY_TX_LISTEN))
|
|
{
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Call the Listen Complete callback, to inform upper layer of the end of Listen usecase */
|
|
HAL_I2C_ListenCpltCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
if((hi2c->PreviousState == I2C_STATE_SLAVE_BUSY_RX) || (CurrentState == HAL_I2C_STATE_BUSY_RX))
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
HAL_I2C_SlaveRxCpltCallback(hi2c);
|
|
}
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_Slave_AF(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of temporary variables to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentState = hi2c->State;
|
|
uint32_t CurrentXferOptions = hi2c->XferOptions;
|
|
|
|
if(((CurrentXferOptions == I2C_FIRST_AND_LAST_FRAME) || (CurrentXferOptions == I2C_LAST_FRAME)) && \
|
|
(CurrentState == HAL_I2C_STATE_LISTEN))
|
|
{
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
|
|
/* Disable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
/* Clear AF flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Call the Listen Complete callback, to inform upper layer of the end of Listen usecase */
|
|
HAL_I2C_ListenCpltCallback(hi2c);
|
|
}
|
|
else if(CurrentState == HAL_I2C_STATE_BUSY_TX)
|
|
{
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->PreviousState = I2C_STATE_SLAVE_BUSY_TX;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Disable EVT, BUF and ERR interrupt */
|
|
__HAL_I2C_DISABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR);
|
|
|
|
/* Clear AF flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
HAL_I2C_SlaveTxCpltCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
/* Clear AF flag only */
|
|
/* State Listen, but XferOptions == FIRST or NEXT */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief I2C interrupts error process
|
|
* @param hi2c I2C handle.
|
|
* @retval None
|
|
*/
|
|
static void I2C_ITError(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
/* Declaration of temporary variable to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentState = hi2c->State;
|
|
|
|
if((CurrentState == HAL_I2C_STATE_BUSY_TX_LISTEN) || (CurrentState == HAL_I2C_STATE_BUSY_RX_LISTEN))
|
|
{
|
|
/* keep HAL_I2C_STATE_LISTEN */
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_LISTEN;
|
|
}
|
|
else
|
|
{
|
|
/* If state is an abort treatment on going, don't change state */
|
|
/* This change will be do later */
|
|
if((hi2c->State != HAL_I2C_STATE_ABORT) && ((hi2c->Instance->CR2 & I2C_CR2_DMAEN) != I2C_CR2_DMAEN))
|
|
{
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
}
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
}
|
|
|
|
/* Disable Pos bit in I2C CR1 when error occurred in Master/Mem Receive IT Process */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
|
|
|
|
/* Abort DMA transfer */
|
|
if((hi2c->Instance->CR2 & I2C_CR2_DMAEN) == I2C_CR2_DMAEN)
|
|
{
|
|
hi2c->Instance->CR2 &= ~I2C_CR2_DMAEN;
|
|
|
|
if(hi2c->hdmatx->State != HAL_DMA_STATE_READY)
|
|
{
|
|
/* Set the DMA Abort callback :
|
|
will lead to call HAL_I2C_ErrorCallback() at end of DMA abort procedure */
|
|
hi2c->hdmatx->XferAbortCallback = I2C_DMAAbort;
|
|
|
|
if(HAL_DMA_Abort_IT(hi2c->hdmatx) != HAL_OK)
|
|
{
|
|
/* Disable I2C peripheral to prevent dummy data in buffer */
|
|
__HAL_I2C_DISABLE(hi2c);
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
/* Call Directly XferAbortCallback function in case of error */
|
|
hi2c->hdmatx->XferAbortCallback(hi2c->hdmatx);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Set the DMA Abort callback :
|
|
will lead to call HAL_I2C_ErrorCallback() at end of DMA abort procedure */
|
|
hi2c->hdmarx->XferAbortCallback = I2C_DMAAbort;
|
|
|
|
if(HAL_DMA_Abort_IT(hi2c->hdmarx) != HAL_OK)
|
|
{
|
|
/* Store Last receive data if any */
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) == SET)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
}
|
|
|
|
/* Disable I2C peripheral to prevent dummy data in buffer */
|
|
__HAL_I2C_DISABLE(hi2c);
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
/* Call Directly hi2c->hdmarx->XferAbortCallback function in case of error */
|
|
hi2c->hdmarx->XferAbortCallback(hi2c->hdmarx);
|
|
}
|
|
}
|
|
}
|
|
else if(hi2c->State == HAL_I2C_STATE_ABORT)
|
|
{
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Store Last receive data if any */
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) == SET)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
}
|
|
|
|
/* Disable I2C peripheral to prevent dummy data in buffer */
|
|
__HAL_I2C_DISABLE(hi2c);
|
|
|
|
/* Call the corresponding callback to inform upper layer of End of Transfer */
|
|
HAL_I2C_AbortCpltCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
/* Store Last receive data if any */
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) == SET)
|
|
{
|
|
/* Read data from DR */
|
|
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
|
|
}
|
|
|
|
/* Call user error callback */
|
|
HAL_I2C_ErrorCallback(hi2c);
|
|
}
|
|
/* STOP Flag is not set after a NACK reception */
|
|
/* So may inform upper layer that listen phase is stopped */
|
|
/* during NACK error treatment */
|
|
if((hi2c->State == HAL_I2C_STATE_LISTEN) && ((hi2c->ErrorCode & HAL_I2C_ERROR_AF) == HAL_I2C_ERROR_AF))
|
|
{
|
|
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Call the Listen Complete callback, to inform upper layer of the end of Listen usecase */
|
|
HAL_I2C_ListenCpltCallback(hi2c);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_MasterRequestWrite(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
/* Declaration of temporary variable to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentXferOptions = hi2c->XferOptions;
|
|
|
|
/* Generate Start condition if first transfer */
|
|
if((CurrentXferOptions == I2C_FIRST_AND_LAST_FRAME) || (CurrentXferOptions == I2C_FIRST_FRAME) || (CurrentXferOptions == I2C_NO_OPTION_FRAME))
|
|
{
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
}
|
|
else if(hi2c->PreviousState == I2C_STATE_MASTER_BUSY_RX)
|
|
{
|
|
/* Generate ReStart */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
}
|
|
|
|
/* Wait until SB flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_SB, RESET, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
if(hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_7BIT)
|
|
{
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_WRITE(DevAddress);
|
|
}
|
|
else
|
|
{
|
|
/* Send header of slave address */
|
|
hi2c->Instance->DR = I2C_10BIT_HEADER_WRITE(DevAddress);
|
|
|
|
/* Wait until ADD10 flag is set */
|
|
if(I2C_WaitOnMasterAddressFlagUntilTimeout(hi2c, I2C_FLAG_ADD10, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_10BIT_ADDRESS(DevAddress);
|
|
}
|
|
|
|
/* Wait until ADDR flag is set */
|
|
if(I2C_WaitOnMasterAddressFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Master sends target device address for read request.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @param DevAddress Target device address: The device 7 bits address value
|
|
* in datasheet must be shift at right before call interface
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_MasterRequestRead(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
/* Declaration of temporary variable to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentXferOptions = hi2c->XferOptions;
|
|
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate Start condition if first transfer */
|
|
if((CurrentXferOptions == I2C_FIRST_AND_LAST_FRAME) || (CurrentXferOptions == I2C_FIRST_FRAME) || (CurrentXferOptions == I2C_NO_OPTION_FRAME))
|
|
{
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
}
|
|
else if(hi2c->PreviousState == I2C_STATE_MASTER_BUSY_TX)
|
|
{
|
|
/* Generate ReStart */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
}
|
|
|
|
/* Wait until SB flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_SB, RESET, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
if(hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_7BIT)
|
|
{
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_READ(DevAddress);
|
|
}
|
|
else
|
|
{
|
|
/* Send header of slave address */
|
|
hi2c->Instance->DR = I2C_10BIT_HEADER_WRITE(DevAddress);
|
|
|
|
/* Wait until ADD10 flag is set */
|
|
if(I2C_WaitOnMasterAddressFlagUntilTimeout(hi2c, I2C_FLAG_ADD10, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_10BIT_ADDRESS(DevAddress);
|
|
|
|
/* Wait until ADDR flag is set */
|
|
if(I2C_WaitOnMasterAddressFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Generate Restart */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Wait until SB flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_SB, RESET, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Send header of slave address */
|
|
hi2c->Instance->DR = I2C_10BIT_HEADER_READ(DevAddress);
|
|
}
|
|
|
|
/* Wait until ADDR flag is set */
|
|
if(I2C_WaitOnMasterAddressFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Master sends target device address followed by internal memory address for write request.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @param DevAddress Target device address
|
|
* @param MemAddress Internal memory address
|
|
* @param MemAddSize Size of internal memory address
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_RequestMemoryWrite(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Wait until SB flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_SB, RESET, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_WRITE(DevAddress);
|
|
|
|
/* Wait until ADDR flag is set */
|
|
if(I2C_WaitOnMasterAddressFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Wait until TXE flag is set */
|
|
if(I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* If Memory address size is 8Bit */
|
|
if(MemAddSize == I2C_MEMADD_SIZE_8BIT)
|
|
{
|
|
/* Send Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(MemAddress);
|
|
}
|
|
/* If Memory address size is 16Bit */
|
|
else
|
|
{
|
|
/* Send MSB of Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_MSB(MemAddress);
|
|
|
|
/* Wait until TXE flag is set */
|
|
if(I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Send LSB of Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(MemAddress);
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Master sends target device address followed by internal memory address for read request.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @param DevAddress Target device address
|
|
* @param MemAddress Internal memory address
|
|
* @param MemAddSize Size of internal memory address
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_RequestMemoryRead(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
/* Enable Acknowledge */
|
|
hi2c->Instance->CR1 |= I2C_CR1_ACK;
|
|
|
|
/* Generate Start */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Wait until SB flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_SB, RESET, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_WRITE(DevAddress);
|
|
|
|
/* Wait until ADDR flag is set */
|
|
if(I2C_WaitOnMasterAddressFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Clear ADDR flag */
|
|
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
|
|
|
|
/* Wait until TXE flag is set */
|
|
if(I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* If Memory address size is 8Bit */
|
|
if(MemAddSize == I2C_MEMADD_SIZE_8BIT)
|
|
{
|
|
/* Send Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(MemAddress);
|
|
}
|
|
/* If Memory address size is 16Bit */
|
|
else
|
|
{
|
|
/* Send MSB of Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_MSB(MemAddress);
|
|
|
|
/* Wait until TXE flag is set */
|
|
if(I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Send LSB of Memory Address */
|
|
hi2c->Instance->DR = I2C_MEM_ADD_LSB(MemAddress);
|
|
}
|
|
|
|
/* Wait until TXE flag is set */
|
|
if(I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
/* Generate Restart */
|
|
hi2c->Instance->CR1 |= I2C_CR1_START;
|
|
|
|
/* Wait until SB flag is set */
|
|
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_SB, RESET, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
|
|
/* Send slave address */
|
|
hi2c->Instance->DR = I2C_7BIT_ADD_READ(DevAddress);
|
|
|
|
/* Wait until ADDR flag is set */
|
|
if(I2C_WaitOnMasterAddressFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, Timeout, Tickstart) != HAL_OK)
|
|
{
|
|
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
else
|
|
{
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief DMA I2C process complete callback.
|
|
* @param hdma DMA handle
|
|
* @retval None
|
|
*/
|
|
static void I2C_DMAXferCplt(DMA_HandleTypeDef *hdma)
|
|
{
|
|
I2C_HandleTypeDef* hi2c = (I2C_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
|
|
|
|
/* Declaration of temporary variable to prevent undefined behavior of volatile usage */
|
|
uint32_t CurrentState = hi2c->State;
|
|
uint32_t CurrentMode = hi2c->Mode;
|
|
|
|
if((CurrentState == HAL_I2C_STATE_BUSY_TX) || ((CurrentState == HAL_I2C_STATE_BUSY_RX) && (CurrentMode == HAL_I2C_MODE_SLAVE)))
|
|
{
|
|
/* Disable DMA Request */
|
|
hi2c->Instance->CR2 &= ~I2C_CR2_DMAEN;
|
|
|
|
hi2c->XferCount = 0U;
|
|
|
|
/* Enable EVT and ERR interrupt */
|
|
__HAL_I2C_ENABLE_IT(hi2c, I2C_IT_EVT | I2C_IT_ERR);
|
|
}
|
|
else
|
|
{
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Disable Last DMA */
|
|
hi2c->Instance->CR2 &= ~I2C_CR2_LAST;
|
|
|
|
/* Disable DMA Request */
|
|
hi2c->Instance->CR2 &= ~I2C_CR2_DMAEN;
|
|
|
|
hi2c->XferCount = 0U;
|
|
|
|
/* Check if Errors has been detected during transfer */
|
|
if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
|
|
{
|
|
HAL_I2C_ErrorCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
|
|
if(hi2c->Mode == HAL_I2C_MODE_MEM)
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
HAL_I2C_MemRxCpltCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
HAL_I2C_MasterRxCpltCallback(hi2c);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief DMA I2C communication error callback.
|
|
* @param hdma DMA handle
|
|
* @retval None
|
|
*/
|
|
static void I2C_DMAError(DMA_HandleTypeDef *hdma)
|
|
{
|
|
I2C_HandleTypeDef* hi2c = (I2C_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
hi2c->XferCount = 0U;
|
|
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_DMA;
|
|
|
|
HAL_I2C_ErrorCallback(hi2c);
|
|
}
|
|
|
|
/**
|
|
* @brief DMA I2C communication abort callback
|
|
* (To be called at end of DMA Abort procedure).
|
|
* @param hdma: DMA handle.
|
|
* @retval None
|
|
*/
|
|
static void I2C_DMAAbort(DMA_HandleTypeDef *hdma)
|
|
{
|
|
I2C_HandleTypeDef* hi2c = ( I2C_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
|
|
|
|
/* Disable Acknowledge */
|
|
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
|
|
|
|
hi2c->XferCount = 0U;
|
|
|
|
/* Reset XferAbortCallback */
|
|
hi2c->hdmatx->XferAbortCallback = NULL;
|
|
hi2c->hdmarx->XferAbortCallback = NULL;
|
|
|
|
/* Check if come from abort from user */
|
|
if(hi2c->State == HAL_I2C_STATE_ABORT)
|
|
{
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
|
|
/* Disable I2C peripheral to prevent dummy data in buffer */
|
|
__HAL_I2C_DISABLE(hi2c);
|
|
|
|
/* Call the corresponding callback to inform upper layer of End of Transfer */
|
|
HAL_I2C_AbortCpltCallback(hi2c);
|
|
}
|
|
else
|
|
{
|
|
hi2c->State = HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Disable I2C peripheral to prevent dummy data in buffer */
|
|
__HAL_I2C_DISABLE(hi2c);
|
|
|
|
/* Call the corresponding callback to inform upper layer of End of Transfer */
|
|
HAL_I2C_ErrorCallback(hi2c);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles I2C Communication Timeout.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @param Flag specifies the I2C flag to check.
|
|
* @param Status The new Flag status (SET or RESET).
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_WaitOnFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, FlagStatus Status, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
/* Wait until flag is set */
|
|
while((__HAL_I2C_GET_FLAG(hi2c, Flag) ? SET : RESET) == Status)
|
|
{
|
|
/* Check for the Timeout */
|
|
if(Timeout != HAL_MAX_DELAY)
|
|
{
|
|
if((Timeout == 0U)||((HAL_GetTick() - Tickstart ) > Timeout))
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
hi2c->Mode = HAL_I2C_MODE_NONE;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
}
|
|
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles I2C Communication Timeout for Master addressing phase.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for I2C module
|
|
* @param Flag specifies the I2C flag to check.
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_WaitOnMasterAddressFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
while(__HAL_I2C_GET_FLAG(hi2c, Flag) == RESET)
|
|
{
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF) == SET)
|
|
{
|
|
/* Generate Stop */
|
|
hi2c->Instance->CR1 |= I2C_CR1_STOP;
|
|
|
|
/* Clear AF Flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
|
|
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_AF;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Check for the Timeout */
|
|
if(Timeout != HAL_MAX_DELAY)
|
|
{
|
|
if((Timeout == 0U)||((HAL_GetTick() - Tickstart ) > Timeout))
|
|
{
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles I2C Communication Timeout for specific usage of TXE flag.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_WaitOnTXEFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXE) == RESET)
|
|
{
|
|
/* Check if a NACK is detected */
|
|
if(I2C_IsAcknowledgeFailed(hi2c) != HAL_OK)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Check for the Timeout */
|
|
if(Timeout != HAL_MAX_DELAY)
|
|
{
|
|
if((Timeout == 0U) || ((HAL_GetTick()-Tickstart) > Timeout))
|
|
{
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles I2C Communication Timeout for specific usage of BTF flag.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_WaitOnBTFFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == RESET)
|
|
{
|
|
/* Check if a NACK is detected */
|
|
if(I2C_IsAcknowledgeFailed(hi2c) != HAL_OK)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Check for the Timeout */
|
|
if(Timeout != HAL_MAX_DELAY)
|
|
{
|
|
if((Timeout == 0U) || ((HAL_GetTick()-Tickstart) > Timeout))
|
|
{
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles I2C Communication Timeout for specific usage of STOP flag.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_WaitOnSTOPFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_STOPF) == RESET)
|
|
{
|
|
/* Check if a NACK is detected */
|
|
if(I2C_IsAcknowledgeFailed(hi2c) != HAL_OK)
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Check for the Timeout */
|
|
if((Timeout == 0U) || ((HAL_GetTick()-Tickstart) > Timeout))
|
|
{
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles I2C Communication Timeout for specific usage of RXNE flag.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @param Timeout Timeout duration
|
|
* @param Tickstart Tick start value
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_WaitOnRXNEFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart)
|
|
{
|
|
|
|
while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) == RESET)
|
|
{
|
|
/* Check if a STOPF is detected */
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_STOPF) == SET)
|
|
{
|
|
/* Clear STOP Flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);
|
|
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Check for the Timeout */
|
|
if((Timeout == 0U) || ((HAL_GetTick()-Tickstart) > Timeout))
|
|
{
|
|
hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief This function handles Acknowledge failed detection during an I2C Communication.
|
|
* @param hi2c Pointer to a I2C_HandleTypeDef structure that contains
|
|
* the configuration information for the specified I2C.
|
|
* @retval HAL status
|
|
*/
|
|
static HAL_StatusTypeDef I2C_IsAcknowledgeFailed(I2C_HandleTypeDef *hi2c)
|
|
{
|
|
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF) == SET)
|
|
{
|
|
/* Clear NACKF Flag */
|
|
__HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);
|
|
|
|
hi2c->ErrorCode = HAL_I2C_ERROR_AF;
|
|
hi2c->PreviousState = I2C_STATE_NONE;
|
|
hi2c->State= HAL_I2C_STATE_READY;
|
|
|
|
/* Process Unlocked */
|
|
__HAL_UNLOCK(hi2c);
|
|
|
|
return HAL_ERROR;
|
|
}
|
|
return HAL_OK;
|
|
}
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* HAL_I2C_MODULE_ENABLED */
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|