Malcolm McCulloch / NRF2401P

This is a work in progress for an NRF2401P

Dependents:   NRF_receiver sender locker4 Weather_Station_Ofiicial ... more

About

This is a simple library to drive the nRF24l01+.

Hardware

This uses the commonly available breakout. The connections are shown below /media/uploads/epgmdm/nrf24l01pinout.png

Software

Use case: For a simple transmitter

tx code snipet

#include "NRF2401P.h"
int main() {
*
*  long long addr1=0xAB00CD; // setup address - any 5 byte number - same as RX
*  int channel =0x12;  // [0-126] setup channel, must be same as RX
*  bool txOK;
*  char msg[32];
*  char ackData[32];
*  char len;
*
*  // Setup 
*  NRF2401P nrf1(PTD6,PTD7, PTD5,PTD4, PTC12); //mosi, miso, sclk, csn, ce)
*  nrf1.quickTxSetup(channel, addr1); // sets nrf24l01+ as transmitter
*
*  // transmit
*  strcpy (msg, "Hello"); 
*  txOK= nrf1.transmitData(msg,strlen(msg));
*
*  // read ack data if available
*  if (nrf1.isAckData()) { 
*      len= nrf1.getRxData(ackData); // len is number of bytes in ackData
*   }
*}

Use case: For a simple receiver

rx code snipet

#include "NRF2401P.h"
*int main(){
*        
*  long long addr1=0xAB00CD; // setup address - any 5 byte number - same as TX
*  int channel =0x12;  // [0-126] setup channel, must be same as TX
*  bool txOK;
*  char msg[32];
*  char ackData[32];
*  char len;
*
*  // Setup 
*  NRF2401P nrf1(PTD6,PTD7, PTD5,PTD4, PTC12); //mosi, miso, sclk, csn, ce)
*  nrf1.quickRxSetup(channel, addr1); // sets nrf24l01+ as  receiver, using pipe 1
*
*  // set ack data
*  sprintf(ackData,"Ack data");
*  nrf1.acknowledgeData(ackData, strlen(ackData),1); // ack for pipe 1
*    
*  // receive
*  while (! nrf1.isRxData()); // note this blocks until RX data
*  len= nrf1.getRxData(msg); // gets the message, len is length of msg
*
*}

NRF2401P.h@14:976a876819ae, 2015-07-11 (annotated)

Committer:
nixonkj
Date:
Sat Jul 11 22:17:36 2015 +0000
Revision:
14:976a876819ae
Parent:
13:5cbc726f2bbb
Child:
17:b132fc1a27d2
Minro housekeeping.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
epgmdm 0:8fd0531ae0be 1 /**
epgmdm 0:8fd0531ae0be 2 *@section DESCRIPTION
epgmdm 0:8fd0531ae0be 3 * mbed NRF2401+ Library
epgmdm 0:8fd0531ae0be 4 *@section LICENSE
epgmdm 0:8fd0531ae0be 5 * Copyright (c) 2015, Malcolm McCulloch
epgmdm 0:8fd0531ae0be 6 *
epgmdm 0:8fd0531ae0be 7 * Permission is hereby granted, free of charge, to any person obtaining a copy
epgmdm 0:8fd0531ae0be 8 * of this software and associated documentation files (the "Software"), to deal
epgmdm 0:8fd0531ae0be 9 * in the Software without restriction, including without limitation the rights
epgmdm 0:8fd0531ae0be 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
epgmdm 0:8fd0531ae0be 11 * copies of the Software, and to permit persons to whom the Software is
epgmdm 0:8fd0531ae0be 12 * furnished to do so, subject to the following conditions:
epgmdm 0:8fd0531ae0be 13 *
epgmdm 0:8fd0531ae0be 14 * The above copyright notice and this permission notice shall be included in
epgmdm 0:8fd0531ae0be 15 * all copies or substantial portions of the Software.
epgmdm 0:8fd0531ae0be 16 *
epgmdm 0:8fd0531ae0be 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
epgmdm 0:8fd0531ae0be 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
epgmdm 0:8fd0531ae0be 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
epgmdm 0:8fd0531ae0be 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
epgmdm 0:8fd0531ae0be 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
epgmdm 0:8fd0531ae0be 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
epgmdm 0:8fd0531ae0be 23 * THE SOFTWARE.
epgmdm 0:8fd0531ae0be 24 * @file "NRF2401P.h"
epgmdm 0:8fd0531ae0be 25 */
nixonkj 9:c21b80aaf250 26
nixonkj 9:c21b80aaf250 27 #ifndef MBED_NRF2401P_H
nixonkj 9:c21b80aaf250 28 #define MBED_NRF2401P_H
epgmdm 5:7e253c677a1f 29
epgmdm 5:7e253c677a1f 30 /** \brief A library to drive the nRF24l01+
epgmdm 5:7e253c677a1f 31 *
epgmdm 5:7e253c677a1f 32 * This library is a simple way to get the nRF24l01+ up and running.
epgmdm 5:7e253c677a1f 33 *
epgmdm 5:7e253c677a1f 34 *- Use case: For a simple transmitter
epgmdm 5:7e253c677a1f 35 *@code
epgmdm 5:7e253c677a1f 36 *int main() {
epgmdm 5:7e253c677a1f 37 *
epgmdm 5:7e253c677a1f 38 * long long addr1=0xAB00CD; // setup address - any 5 byte number - same as RX
epgmdm 5:7e253c677a1f 39 * int channel =0x12; // [0-126] setup channel, must be same as RX
epgmdm 5:7e253c677a1f 40 * bool txOK;
epgmdm 5:7e253c677a1f 41 * char msg[32];
epgmdm 5:7e253c677a1f 42 * char ackData[32];
epgmdm 5:7e253c677a1f 43 * char len;
epgmdm 5:7e253c677a1f 44 *
epgmdm 5:7e253c677a1f 45 * // Setup
epgmdm 5:7e253c677a1f 46 * NRF2401P nrf1(PTD6,PTD7, PTD5,PTD4, PTC12); //mosi, miso, sclk, csn, ce)
epgmdm 5:7e253c677a1f 47 * nrf1.quickTxSetup(channel, addr1); // sets nrf24l01+ as transmitter
epgmdm 5:7e253c677a1f 48 *
epgmdm 5:7e253c677a1f 49 * // transmit
epgmdm 5:7e253c677a1f 50 * strcpy (msg, "Hello");
epgmdm 5:7e253c677a1f 51 * txOK= nrf1.transmitData(msg,strlen(msg));
epgmdm 5:7e253c677a1f 52 *
epgmdm 5:7e253c677a1f 53 * // read ack data if available
epgmdm 5:7e253c677a1f 54 * if (nrf1.isAckData()) {
epgmdm 5:7e253c677a1f 55 * len= nrf1.getRxData(ackData); // len is number of bytes in ackData
epgmdm 5:7e253c677a1f 56 * }
epgmdm 5:7e253c677a1f 57 *}
epgmdm 5:7e253c677a1f 58 *@endcode
epgmdm 5:7e253c677a1f 59 *- Use case: For a simple receiver
epgmdm 5:7e253c677a1f 60 *@code
epgmdm 5:7e253c677a1f 61 *int main(){
epgmdm 5:7e253c677a1f 62 *
epgmdm 5:7e253c677a1f 63 * long long addr1=0xAB00CD; // setup address - any 5 byte number - same as TX
epgmdm 5:7e253c677a1f 64 * int channel =0x12; // [0-126] setup channel, must be same as TX
epgmdm 5:7e253c677a1f 65 * bool txOK;
epgmdm 5:7e253c677a1f 66 * char msg[32];
epgmdm 5:7e253c677a1f 67 * char ackData[32];
epgmdm 5:7e253c677a1f 68 * char len;
epgmdm 5:7e253c677a1f 69 *
epgmdm 5:7e253c677a1f 70 * // Setup
epgmdm 5:7e253c677a1f 71 * NRF2401P nrf1(PTD6,PTD7, PTD5,PTD4, PTC12); //mosi, miso, sclk, csn, ce)
epgmdm 5:7e253c677a1f 72 * nrf1.quickRxSetup(channel, addr1); // sets nrf24l01+ as receiver, using pipe 1
epgmdm 5:7e253c677a1f 73 *
epgmdm 5:7e253c677a1f 74 * // set ack data
epgmdm 5:7e253c677a1f 75 * sprintf(ackData,"Ack data");
epgmdm 5:7e253c677a1f 76 * nrf1.acknowledgeData(ackData, strlen(ackData),1); // ack for pipe 1
epgmdm 5:7e253c677a1f 77 *
epgmdm 5:7e253c677a1f 78 * // receive
epgmdm 5:7e253c677a1f 79 * while (! nrf1.isRxData()); // note this blocks until RX data
epgmdm 5:7e253c677a1f 80 * len= nrf1.getRxData(msg); // gets the message, len is length of msg
epgmdm 5:7e253c677a1f 81 *
epgmdm 5:7e253c677a1f 82 *}
epgmdm 5:7e253c677a1f 83 *@endcode
epgmdm 5:7e253c677a1f 84 */
nixonkj 9:c21b80aaf250 85
epgmdm 0:8fd0531ae0be 86 class NRF2401P
epgmdm 0:8fd0531ae0be 87 {
epgmdm 0:8fd0531ae0be 88 public:
epgmdm 0:8fd0531ae0be 89 SPI *spi;
epgmdm 0:8fd0531ae0be 90 DigitalOut csn,ce;
epgmdm 0:8fd0531ae0be 91 char addressWidth;
epgmdm 0:8fd0531ae0be 92 char logMsg[80];
epgmdm 0:8fd0531ae0be 93 char status;
epgmdm 0:8fd0531ae0be 94 char statusS[32];
epgmdm 2:ca0a3c0bba70 95 char pipe0Add[5];
epgmdm 2:ca0a3c0bba70 96 char txAdd[5];
epgmdm 0:8fd0531ae0be 97 bool dynamic,debug;
epgmdm 0:8fd0531ae0be 98 Serial *pc;
epgmdm 0:8fd0531ae0be 99
nixonkj 9:c21b80aaf250 100 /** Create a radio device for communicating with the RF24L01P via SPI.
nixonkj 9:c21b80aaf250 101 *
nixonkj 9:c21b80aaf250 102 * @param mosi The SPI slave data input pin.
nixonkj 9:c21b80aaf250 103 * @param miso The SPI Slave Data Output (with tri-state option).
nixonkj 9:c21b80aaf250 104 * @param sclk The SPI clock pin.
nixonkj 9:c21b80aaf250 105 * @param _csn The SPI chip select pin.
nixonkj 9:c21b80aaf250 106 * @param _ce Chip Enable pin (Activates RX or TX mode).
nixonkj 9:c21b80aaf250 107 */
epgmdm 0:8fd0531ae0be 108 NRF2401P (PinName mosi, PinName miso, PinName sclk, PinName _csn, PinName _ce);
epgmdm 0:8fd0531ae0be 109
nixonkj 8:3e027705ce23 110 char acknowledgeData(char *data, char width, char pipe);
epgmdm 1:ff53b1ac3bad 111 char checkStatus();
nixonkj 6:77ead8abdd1c 112 void clearStatus();
nixonkj 6:77ead8abdd1c 113 void flushRx();
nixonkj 6:77ead8abdd1c 114 void flushTx();
epgmdm 0:8fd0531ae0be 115 char getRxData(char * buffer);
nixonkj 14:976a876819ae 116
nixonkj 14:976a876819ae 117 /** Get the payload width for the next FIFO item (can be dynamic or static payload width)
nixonkj 14:976a876819ae 118 *
nixonkj 14:976a876819ae 119 * @returns
nixonkj 14:976a876819ae 120 * width of next available payload.
nixonkj 14:976a876819ae 121 */
epgmdm 0:8fd0531ae0be 122 char getRxWidth();
nixonkj 14:976a876819ae 123
epgmdm 1:ff53b1ac3bad 124 bool isAckData();
epgmdm 0:8fd0531ae0be 125 bool isRxData();
nixonkj 8:3e027705ce23 126
nixonkj 13:5cbc726f2bbb 127 /** Is the Received Power Detector (ala carrier detect) register set high?
nixonkj 13:5cbc726f2bbb 128 *
nixonkj 13:5cbc726f2bbb 129 * @returns
nixonkj 13:5cbc726f2bbb 130 * true on received power levels above -64 dBm present in the RF channel.
nixonkj 13:5cbc726f2bbb 131 * false received power is less than -64 dBm (could indicate interference, etc).
nixonkj 13:5cbc726f2bbb 132 */
nixonkj 13:5cbc726f2bbb 133 bool isRPDset();
nixonkj 13:5cbc726f2bbb 134
nixonkj 14:976a876819ae 135
nixonkj 8:3e027705ce23 136 /** Writes message and waits for 10 ms (
nixonkj 8:3e027705ce23 137 *
nixonkj 8:3e027705ce23 138 * @param msg
nixonkj 8:3e027705ce23 139 */
epgmdm 0:8fd0531ae0be 140 void log (char *msg);
nixonkj 8:3e027705ce23 141
epgmdm 0:8fd0531ae0be 142 void quickRxSetup(int channel,long long addr);
epgmdm 0:8fd0531ae0be 143 void quickTxSetup(int channel,long long addr);
nixonkj 6:77ead8abdd1c 144 void readReg(char address, char *data);
nixonkj 10:8a217441c38e 145 void readReg(char address, char *data, char width);
epgmdm 0:8fd0531ae0be 146 char testReceive();
epgmdm 0:8fd0531ae0be 147 char testTransmit();
nixonkj 6:77ead8abdd1c 148 char transmitData( char *data, char width );
epgmdm 0:8fd0531ae0be 149
nixonkj 6:77ead8abdd1c 150 char setAddressWidth(char width);
nixonkj 8:3e027705ce23 151
nixonkj 8:3e027705ce23 152 /** Sets the frequency channel nRF24L01+ operates on
nixonkj 8:3e027705ce23 153 *
nixonkj 8:3e027705ce23 154 * @param chan F0 = 2400 + chan [MHz]
nixonkj 8:3e027705ce23 155 * @returns
nixonkj 8:3e027705ce23 156 * 0 on success,
nixonkj 8:3e027705ce23 157 * non-zero on failure.
nixonkj 8:3e027705ce23 158 */
epgmdm 0:8fd0531ae0be 159 char setChannel(char chan);
nixonkj 8:3e027705ce23 160
epgmdm 2:ca0a3c0bba70 161 void setDynamicPayload();
nixonkj 6:77ead8abdd1c 162 char setPwrUp();
nixonkj 7:621a5b0cf1aa 163
nixonkj 7:621a5b0cf1aa 164 /** Set RF data rate and RF output power in TX mode
nixonkj 7:621a5b0cf1aa 165 *
nixonkj 7:621a5b0cf1aa 166 * @param speed RF data rate: '0x00' – 1Mbps, '0x01' – 2Mbps, '0x02' – 250kbps, '0x03' – Reserved
nixonkj 7:621a5b0cf1aa 167 * @param power RF output power: '0x00' – -18dBm, '0x01' – -12dBm, '0x02' – -6dBm, '0x03' – 0dBm
nixonkj 7:621a5b0cf1aa 168 * @returns
nixonkj 7:621a5b0cf1aa 169 * 0 on success,
nixonkj 7:621a5b0cf1aa 170 * non-zero on failure.
nixonkj 7:621a5b0cf1aa 171 */
nixonkj 7:621a5b0cf1aa 172 char setRadio(char speed, char power);
nixonkj 7:621a5b0cf1aa 173
epgmdm 0:8fd0531ae0be 174 char setRxAddress(char *address, char pipe);
epgmdm 0:8fd0531ae0be 175 char setRxAddress(long long address, char pipe);
nixonkj 6:77ead8abdd1c 176 char setRxMode();
epgmdm 0:8fd0531ae0be 177 char setTxAddress(char *address);
epgmdm 0:8fd0531ae0be 178 char setTxAddress(long long address);
nixonkj 6:77ead8abdd1c 179 char setTxMode();
nixonkj 8:3e027705ce23 180
nixonkj 8:3e027705ce23 181 /** Sets the timing and number of TX retries
nixonkj 8:3e027705ce23 182 *
nixonkj 8:3e027705ce23 183 * @param delay Auto Retransmit Delay: '0000' – Wait 250uS', '0001' – Wait 500uS, ..., '1111' – Wait 4000uS
nixonkj 8:3e027705ce23 184 * @param numTries Auto Retransmit Count: '0000' – Re-Transmit disabled, '0001' – Up to 1 Re-Transmit on fail of AA, ..., '1111' – Up to 15 Re-Transmit on fail of AA
nixonkj 8:3e027705ce23 185 * @returns
nixonkj 8:3e027705ce23 186 * 0 on success,
nixonkj 8:3e027705ce23 187 * non-zero on failure.
nixonkj 8:3e027705ce23 188 */
nixonkj 6:77ead8abdd1c 189 char setTxRetry(char delay, char numTries);
nixonkj 8:3e027705ce23 190
epgmdm 2:ca0a3c0bba70 191 void start();
nixonkj 8:3e027705ce23 192 char* statusString();
nixonkj 11:07f76589f00a 193
nixonkj 11:07f76589f00a 194 /** Print out 1 byte content of register
nixonkj 11:07f76589f00a 195 *
nixonkj 11:07f76589f00a 196 * @param name Name of register to print.
nixonkj 11:07f76589f00a 197 * @param address Register address of interest.
nixonkj 11:07f76589f00a 198 * @param newline By default print a trailing newline, can disable by setting false.
nixonkj 11:07f76589f00a 199 */
nixonkj 11:07f76589f00a 200 void printReg(char* name, char address, bool newline=true);
nixonkj 9:c21b80aaf250 201
nixonkj 11:07f76589f00a 202 /** Print out 'width' bytes content of register
nixonkj 11:07f76589f00a 203 *
nixonkj 11:07f76589f00a 204 * @param name Name of register to print.
nixonkj 11:07f76589f00a 205 * @param address Register address of interest.
nixonkj 11:07f76589f00a 206 * @param width Number of bytes to print.
nixonkj 11:07f76589f00a 207 * @param newline By default print a trailing newline, can disable by setting false.
nixonkj 11:07f76589f00a 208 */
nixonkj 11:07f76589f00a 209 void printReg(char* name, char address, char width, bool newline=true);
nixonkj 11:07f76589f00a 210
nixonkj 11:07f76589f00a 211 /** Print verbose details about the radio setup and configuration
nixonkj 9:c21b80aaf250 212 *
nixonkj 9:c21b80aaf250 213 */
nixonkj 9:c21b80aaf250 214 void printDetails();
nixonkj 9:c21b80aaf250 215
nixonkj 6:77ead8abdd1c 216 void writeReg(char address, char *data, char width);
nixonkj 6:77ead8abdd1c 217 void writeReg(char address, char data);
epgmdm 0:8fd0531ae0be 218
epgmdm 0:8fd0531ae0be 219 void scratch();
epgmdm 0:8fd0531ae0be 220
epgmdm 0:8fd0531ae0be 221
nixonkj 9:c21b80aaf250 222 };
nixonkj 9:c21b80aaf250 223 #endif