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Cleaned up documentation.

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maniacbug 2011-04-03 20:28:54 -07:00
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12
README
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Arduino driver for nRF24L01 2.4GHz Wireless Transceiver
See Datasheet at http://www.nordicsemi.com/files/Product/data_sheet/nRF24L01_Product_Specification_v2_0.pdf
This chip uses the SPI bus, plus two chip control pins. Remember that pin 10 must still remain an output, or
the SPI hardware will go into 'slave' mode.
Design Goals: This library is designed to be...
* Maximally compliant with the intended operation of the chip
* Easy for beginners to use
* Consumed with a public interface that's similiar to other Arduino standard libraries
* Built against the standard SPI library.

19
README.md Normal file
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# Arduino driver for nRF24L01 2.4GHz Wireless Transceiver
Design Goals: This library is designed to be...
* Maximally compliant with the intended operation of the chip
* Easy for beginners to use
* Consumed with a public interface that's similiar to other Arduino standard libraries
* Built against the standard SPI library.
Please refer to:
* [Documentation Main Page](http://maniacbug.github.com/RF24)
* [RF24 Class Documentation](http://maniacbug.github.com/RF24/classRF24.html)
* [Source Code](https://github.com/maniacbug/RF24)
* [Downloads](https://github.com/maniacbug/RF24/archives/master)
* [Chip Datasheet](http://www.nordicsemi.com/files/Product/data_sheet/nRF24L01_Product_Specification_v2_0.pdf)
This chip uses the SPI bus, plus two chip control pins. Remember that pin 10 must still remain an output, or
the SPI hardware will go into 'slave' mode.

60
RF24.h
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@ -13,21 +13,6 @@
/** /**
* Driver for nRF24L01 2.4GHz Wireless Transceiver * Driver for nRF24L01 2.4GHz Wireless Transceiver
*
* Please refer to:
*
* @li <a href="http://maniacbug.github.com/RF24/classRF24.html">Detailed Documentation</a>
* @li <a href="https://github.com/maniacbug/RF24/">Source Code</a>
* @li <a href="http://www.nordicsemi.com/files/Product/data_sheet/nRF24L01_Product_Specification_v2_0.pdf">Chip Datasheet</a>
*
* This chip uses the SPI bus, plus two chip control pins. Remember that pin 10 must still remain an output, or
* the SPI hardware will go into 'slave' mode.
*
* Design Goals: This library is designed to be...
* @li Maximally compliant with the intended operation of the chip
* @li Easy for beginners to use
* @li Consumed with a public interface that's similiar to other Arduino standard libraries
* @li Built against the standard SPI library.
*/ */
class RF24 class RF24
@ -182,7 +167,9 @@ public:
* Set Payload Size * Set Payload Size
* *
* This implementation uses a pre-stablished fixed payload size for all * This implementation uses a pre-stablished fixed payload size for all
* transmissions. * transmissions. If this method is never called, the driver will always
* transmit the maximum payload size (32 bytes), no matter how much
* was sent to write().
* *
* @todo Implement variable-sized payloads feature * @todo Implement variable-sized payloads feature
* *
@ -301,8 +288,8 @@ public:
* Only the least significant byte should be unique, e.g. * Only the least significant byte should be unique, e.g.
* *
* @code * @code
* openReadingPipe(0xF0F0F0F0AA); * openReadingPipe(1,0xF0F0F0F0AA);
* openReadingPipe(0xF0F0F0F066); * openReadingPipe(2,0xF0F0F0F066);
* @endcode * @endcode
* *
* @todo Enforce the restriction that all pipes must share the top 32 bits * @todo Enforce the restriction that all pipes must share the top 32 bits
@ -319,13 +306,44 @@ public:
* *
* This is an example of how to use the RF24 class. Write this sketch to two different nodes, * This is an example of how to use the RF24 class. Write this sketch to two different nodes,
* connect the role_pin to ground on one. The ping node sends the current time to the pong node, * connect the role_pin to ground on one. The ping node sends the current time to the pong node,
* which responds by sending the value back. * which responds by sending the value back. The ping node can then see how long the whole cycle
* took.
*/ */
/** /**
* @mainpage Driver Library for nRF24L01 * @example starping.pde
* *
* See the RF24 class for details on how to drive this chip. * This sketch is a more complex example of using the RF24 library for Arduino.
* Deploy this on up to six nodes. Set one as the 'pong receiver' by tying the
* role_pin low, and the others will be 'ping transmit' units. The ping units
* unit will send out the value of millis() once a second. The pong unit will
* respond back with a copy of the value. Each ping unit can get that response
* back, and determine how long the whole cycle took.
*
* This example requires a bit more complexity to determine which unit is which.
* The pong receiver is identified by having its role_pin tied to ground.
* The ping senders are further differentiated by a byte in eeprom.
*/
/**
* @mainpage Driver for nRF24L01 2.4GHz Wireless Transceiver
*
* Design Goals: This library is designed to be...
* @li Maximally compliant with the intended operation of the chip
* @li Easy for beginners to use
* @li Consumed with a public interface that's similiar to other Arduino standard libraries
* @li Built against the standard SPI library.
*
* Please refer to:
*
* @li <a href="http://maniacbug.github.com/RF24/">Documentation Main Page</a>
* @li <a href="http://maniacbug.github.com/RF24/classRF24.html">RF24 Class Documentation</a>
* @li <a href="https://github.com/maniacbug/RF24/">Source Code</a>
* @li <a href="https://github.com/maniacbug/RF24/archives/master">Downloads Page</a>
* @li <a href="http://www.nordicsemi.com/files/Product/data_sheet/nRF24L01_Product_Specification_v2_0.pdf">Chip Datasheet</a>
*
* This chip uses the SPI bus, plus two chip control pins. Remember that pin 10 must still remain an output, or
* the SPI hardware will go into 'slave' mode.
*/ */
#endif // __RF24_H__ #endif // __RF24_H__

9
examples/pingpair/pingpair.pde
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@ -9,11 +9,10 @@
/** /**
* Example RF Radio Ping Pair * Example RF Radio Ping Pair
* *
* This sketch is an example of using the RF24 library for Arduino. Deploy this on * This is an example of how to use the RF24 class. Write this sketch to two different nodes,
* two nodes, set one as the 'trasmit' and the other the 'receive' unit. The transmit * connect the role_pin to ground on one. The ping node sends the current time to the pong node,
* unit will send out the value of millis() once a second. The receive unit will respond * which responds by sending the value back. The ping node can then see how long the whole cycle
* back with a copy of the value. The transmit unit can get that 'ping' back, and * took.
* determine how long the whole cycle took.
*/ */
#include <SPI.h> #include <SPI.h>

67
examples/starping/starping.pde
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@ -10,14 +10,14 @@
* Example RF Radio Ping Star Group * Example RF Radio Ping Star Group
* *
* This sketch is a more complex example of using the RF24 library for Arduino. * This sketch is a more complex example of using the RF24 library for Arduino.
* Deploy this on up to six nodes. Set one as the 'pong receiver' and the others * Deploy this on up to six nodes. Set one as the 'pong receiver' by tying the
* as 'ping transmit' units. The ping units unit will send out the value of millis() * role_pin low, and the others will be 'ping transmit' units. The ping units
* once a second. The pong unit will respond back with a copy of the value. * unit will send out the value of millis() once a second. The pong unit will
* The ping unit can get that response back, and * respond back with a copy of the value. Each ping unit can get that response
* determine how long the whole cycle took. * back, and determine how long the whole cycle took.
* *
* This example requires a bit more complexity to determine which unit is * This example requires a bit more complexity to determine which unit is which.
* which. The pong receiver is identified by having its role_pin tied to ground. * The pong receiver is identified by having its role_pin tied to ground.
* The ping senders are further differentiated by a byte in eeprom. * The ping senders are further differentiated by a byte in eeprom.
*/ */
@ -27,8 +27,6 @@
#include "RF24.h" #include "RF24.h"
#include "printf.h" #include "printf.h"
extern EEPROMClass EEPROM;
// //
// Hardware configuration // Hardware configuration
// //
@ -45,9 +43,14 @@ const int role_pin = 7;
// Topology // Topology
// //
// Radio pipe addresses for the 6 nodes to communicate // Radio pipe addresses for the nodes to communicate. Only ping nodes need
const uint64_t talking_pipes[6] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL, 0xF0F0F0F0C3LL, 0xF0F0F0F0B4LL, 0xF0F0F0F0A5LL, 0xF0F0F0F096LL }; // dedicated pipes in this topology. Each ping node has a talking pipe
const uint64_t listening_pipes[6] = { 0x3A3A3A3AE1LL, 0x3A3A3A3AD2LL, 0x3A3A3A3AC3LL, 0x3A3A3A3AB4LL, 0x3A3A3A3AA5LL, 0x3A3A3A3A96LL }; // that it will ping into, and a listening pipe that it will listen for
// the pong. The pong node listens on all the ping node talking pipes
// and sends the pong back on the sending node's specific listening pipe.
const uint64_t talking_pipes[5] = { 0xF0F0F0F0D2LL, 0xF0F0F0F0C3LL, 0xF0F0F0F0B4LL, 0xF0F0F0F0A5LL, 0xF0F0F0F096LL };
const uint64_t listening_pipes[5] = { 0x3A3A3A3AD2LL, 0x3A3A3A3AC3LL, 0x3A3A3A3AB4LL, 0x3A3A3A3AA5LL, 0x3A3A3A3A96LL };
// //
// Role management // Role management
@ -76,7 +79,8 @@ role_e role;
const uint8_t address_at_eeprom_location = 0; const uint8_t address_at_eeprom_location = 0;
// What is our address (SRAM cache of the address from EEPROM) // What is our address (SRAM cache of the address from EEPROM)
// Note that zero is an INVALID address // Note that zero is an INVALID address. The pong back unit takes address
// 1, and the rest are 2-6
uint8_t node_address; uint8_t node_address;
void setup(void) void setup(void)
@ -140,25 +144,25 @@ void setup(void)
// Open pipes to other nodes for communication // Open pipes to other nodes for communication
// //
// Open 'our' pipe for writing // The pong node listens on all the ping node talking pipes
// ping nodes open the parent's pipe for reading // and sends the pong back on the sending node's specific listening pipe.
// pong node opens all children's pipes for reading
if ( role == role_pong_back ) if ( role == role_pong_back )
{ {
// Listen to all ping nodes' talking pipes radio.openReadingPipe(1,talking_pipes[0]);
radio.openReadingPipe(1,talking_pipes[1]); radio.openReadingPipe(2,talking_pipes[1]);
radio.openReadingPipe(2,talking_pipes[2]); radio.openReadingPipe(3,talking_pipes[2]);
radio.openReadingPipe(3,talking_pipes[3]); radio.openReadingPipe(4,talking_pipes[3]);
radio.openReadingPipe(4,talking_pipes[4]); radio.openReadingPipe(5,talking_pipes[4]);
radio.openReadingPipe(5,talking_pipes[5]);
} }
// Each ping node has a talking pipe that it will ping into, and a listening
// pipe that it will listen for the pong.
if ( role == role_ping_out ) if ( role == role_ping_out )
{ {
// Write on our talking pipe // Write on our talking pipe
radio.openWritingPipe(talking_pipes[node_address-1]); radio.openWritingPipe(talking_pipes[node_address-2]);
// Listen on our listening pipe // Listen on our listening pipe
radio.openReadingPipe(1,listening_pipes[node_address-1]); radio.openReadingPipe(1,listening_pipes[node_address-2]);
} }
// //
@ -172,6 +176,15 @@ void setup(void)
// //
radio.printDetails(); radio.printDetails();
//
// Prompt the user to assign a node address if we don't have one
//
if ( role == role_invalid )
{
printf("\n\r*** NO NODE ADDRESS ASSIGNED *** Send 1 through 6 to assign an address\n\r");
}
} }
void loop(void) void loop(void)
@ -238,7 +251,7 @@ void loop(void)
done = radio.read( &got_time, sizeof(unsigned long) ); done = radio.read( &got_time, sizeof(unsigned long) );
// Spew it // Spew it
printf("Got payload %lu from %i...",got_time,pipe_num); printf("Got payload %lu from node %i...",got_time,pipe_num+1);
} }
// First, stop listening so we can talk // First, stop listening so we can talk
@ -277,4 +290,4 @@ void loop(void)
} }
} }
} }
// vim:ai sts=2 sw=2 ft=cpp // vim:ai:ci sts=2 sw=2 ft=cpp