hoverboard-firmware-hack-serial-esc/Inc/config.h

#pragma once
#include "stm32f1xx_hal.h"

// ################################################################################

#define PWM_FREQ         16000      // PWM frequency in Hz
#define DEAD_TIME        32         // PWM deadtime

#define DC_CUR_LIMIT     15         // Motor DC current limit in amps. it does not disable motors, it is a soft current limit.

// Battery voltage calibration: connect power source. use multimeter to measure real voltage and write it to BAT_CALIB_REAL_VOLTAGE. watch UART on one of the sensor board cables. write value nr 4 to BAT_CALIB_ADC. make and flash firmware. you can verify voltage on UART debug value 5 (devide it by 100.0 to get calibrated voltage). 
#define BAT_CALIB_REAL_VOLTAGE        42.0       // input voltage measured by multimeter  
#define BAT_CALIB_ADC                 1667       // adc-value measured by mainboard (value nr 4 on UART debug output)

#define BAT_LOW_LVL1     36.0       // gently beeps at this voltage level. ~3.6V/cell
#define BAT_LOW_LVL2     33.0       // your battery is almost empty. Charge now! ~3.3V/cell
#define BAT_LOW_DEAD     31.0       // undervoltage lockout. ~3.1V/cell

// ################################################################################

//#define DEBUG_SERIAL_USART3         // right sensor board cable, disable if I2C (nunchuck) is used!
#define DEBUG_BAUD       115200     // UART baud rate
//#define DEBUG_SERIAL_SERVOTERM
//#define DEBUG_SERIAL_ASCII          // human readable output. i.e. "345;1337;0;0\n\r"

//#define CONTROL_SERIAL_USART2       // left sensor board cable, disable if ADC or PPM is used!
#define CONTROL_BAUD       19200    // control via usart from eg an Arduino or raspberry
// for Arduino, use void loop(void){ Serial.write((uint8_t *) &steer, sizeof(steer)); Serial.write((uint8_t *) &speed, sizeof(speed));delay(20); }

//#define DEBUG_I2C_LCD               // standard 16x2 or larger text-lcd via i2c-converter on right sensor board cable

#define TIMEOUT          5          // number of wrong / missing commands before emergency off

// ################################################################################

// ###### CONTROL VIA RC REMOTE ######
// left sensor board cable. Channel 1: steering, Channel 2: speed.
//#define CONTROL_PPM                 // use PPM-Sum as input. disable DEBUG_SERIAL_USART2!
//#define PPM_NUM_CHANNELS 6          // total number of PPM channels to receive, even if they are not used.

// ###### CONTROL VIA TWO POTENTIOMETERS ######
// ADC-calibration to cover the full poti-range: connect potis to left sensor board cable (0 to 3.3V), watch UART on the right sensor board cable. the first 2 values are ADC1 and ADC2. write minimum and maximum poti position-values to ADC?_MIN and ADC?_MAX.
//#define CONTROL_ADC                 // use ADC as input. disable DEBUG_SERIAL_USART2!
//#define ADC1_MIN 0                  // min ADC1-value while poti at minimum-position (0 - 4095)
//#define ADC1_MAX 4095               // max ADC1-value while poti at maximum-position (0 - 4095)
//#define ADC2_MIN 0                  // min ADC2-value while poti at minimum-position (0 - 4095)
//#define ADC2_MAX 4095               // max ADC2-value while poti at maximum-position (0 - 4095)

// ###### CONTROL VIA NINTENDO NUNCHUCK ######
// left sensor board cable. keep cable short, use shielded cable, use ferrits, stabalize voltage in nunchuck, use the right one of the 2 types of nunchucks, add i2c pullups.
//#define CONTROL_NUNCHUCK            // use nunchuck as input. disable DEBUG_SERIAL_USART3!

// ################################################################################

// ###### DRIVING BEHAVIOR ######

// inputs:
// - cmd1 and cmd2: analog normalized input values. -1000 to 1000
// - button1 and button2: digital input values. 0 or 1
// - adc_buffer.l_tx2 and adc_buffer.l_rx2: unfiltered ADC values (you do not need them). 0 to 4095
// outputs:
// - speedR and speedL: normal driving -1000 to 1000
// - weakr and weakl: field weakening for extra boost at high speed (speedR > 700 and speedL > 700). 0 to ~400

#define FILTER              0.1  // lower value == softer filter. do not use values <0.01, you will get float precision issues.
#define SPEED_COEFFICIENT   0.5  // higher value == stronger. 0.0 to 1.0
#define STEER_COEFFICIENT   0.5  // higher value == stronger. if you do not want any steering, set it to 0.0; 0.0 to 1.0
//#define INVERT_R_DIRECTION
//#define INVERT_L_DIRECTION

//Turbo boost at high speeds while button1 is pressed:
//#define ADDITIONAL_CODE \
if (button1 && speedR > 700) { /* field weakening at high speeds */ \
  weakl = cmd1 - 700; /* weak should never exceed 400 or 450 MAX!! */ \
  weakr = cmd1 - 700; } \
else { \
  weakl = 0; \
  weakr = 0; }

// ###### BOBBYCAR ######
// #define FILTER              0.1
// #define SPEED_COEFFICIENT   -1
// #define STEER_COEFFICIENT   0

// #define ADDITIONAL_CODE \
if (button1 && speedR < 300) { /* drive backwards */ \
  speedR = speedR * -0.2f;   \
  speedL = speedL * -0.2f; } \
else { \
  direction = 1; } \
if (button1 && speedR > 700) { /* field weakening at high speeds */ \
  weakl = speedR - 600; /* weak should never exceed 400 or 450 MAX!! */ \
  weakr = speedR - 600; } \
else { \
  weakl = 0; \
  weakr = 0; }

// ###### ARMCHAIR ######
// #define FILTER              0.05
// #define SPEED_COEFFICIENT   0.5
// #define STEER_COEFFICIENT   -0.2

// #define ADDITIONAL_CODE if (button1 && scale > 0.8) { /* field weakening at high speeds */ \
  weakl = speedL - 600; /* weak should never exceed 400 or 450 MAX!! */ \
  weakr = speedR - 600; } \
else {\
  weakl = 0;\
  weakr = 0;

// #define BEEPS_BACKWARD

// ################################################################################

// validate settings (do not touch this):

#if defined DEBUG_SERIAL_USART2 && defined CONTROL_ADC
  #error CONTROL_ADC and DEBUG_SERIAL_USART2 not allowed. use DEBUG_SERIAL_USART3 instead.
#endif

#if defined DEBUG_SERIAL_USART2 && defined CONTROL_PPM
  #error CONTROL_PPM and DEBUG_SERIAL_USART2 not allowed. use DEBUG_SERIAL_USART3 instead.
#endif

#if defined DEBUG_SERIAL_USART3 && defined CONTROL_NUNCHUCK
  #error CONTROL_NUNCHUCK and DEBUG_SERIAL_USART3 not allowed. use DEBUG_SERIAL_USART2 instead.
#endif

#if defined CONTROL_PPM && defined CONTROL_ADC && defined CONTROL_NUNCHUCK || defined CONTROL_PPM && defined CONTROL_ADC || defined CONTROL_ADC && defined CONTROL_NUNCHUCK || defined CONTROL_PPM && defined CONTROL_NUNCHUCK
  #error only 1 input method allowed. use CONTROL_PPM or CONTROL_ADC or CONTROL_NUNCHUCK.
#endif