Harry Eakins / RF12B

Library to send and receive data using RF12B transceiver modules Big thanks to the tutorial at https://loee.jottit.com/rfm12b_and_avr_-_quick_start and madcowswe

Dependents:   Measure_system Quadcopter_copy

RF12B.h@9:cd34784da6da, 2011-03-11 (annotated)

Committer:
harryeakins
Date:
Fri Mar 11 21:38:26 2011 +0000
Revision:
9:cd34784da6da
Parent:
8:6fc24b44e027 
Fixed bug in initialization routine where the mode of the RF module was not set.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
harryeakins 0:bd1232f200be 1 #ifndef _RF12B_H
harryeakins 0:bd1232f200be 2 #define _RF12B_H
harryeakins 0:bd1232f200be 3
harryeakins 0:bd1232f200be 4 #include "mbed.h"
harryeakins 4:2a295db9ba1a 5 #include <queue>
harryeakins 4:2a295db9ba1a 6
harryeakins 4:2a295db9ba1a 7 enum rfmode_t{RX, TX};
harryeakins 0:bd1232f200be 8
harryeakins 0:bd1232f200be 9 class RF12B {
harryeakins 0:bd1232f200be 10 public:
harryeakins 4:2a295db9ba1a 11 /* Constructor */
harryeakins 0:bd1232f200be 12 RF12B(PinName SDI,
harryeakins 2:99cf337cd23e 13 PinName SDO,
harryeakins 2:99cf337cd23e 14 PinName SCK,
harryeakins 2:99cf337cd23e 15 PinName NCS,
harryeakins 2:99cf337cd23e 16 PinName NIRQ);
harryeakins 7:9f9e2a63a8a2 17
harryeakins 7:9f9e2a63a8a2 18
harryeakins 7:9f9e2a63a8a2 19
harryeakins 7:9f9e2a63a8a2 20 /* Reads a packet of data. Returns false if read failed. Use available() to check how much space to allocate for buffer */
harryeakins 7:9f9e2a63a8a2 21 bool read(unsigned char* data, unsigned int size);
harryeakins 2:99cf337cd23e 22
harryeakins 4:2a295db9ba1a 23 /* Reads a byte of data from the receive buffer
harryeakins 4:2a295db9ba1a 24 Returns 0xFF if there is no data */
harryeakins 0:bd1232f200be 25 unsigned char read();
harryeakins 2:99cf337cd23e 26
harryeakins 4:2a295db9ba1a 27 /* Transmits a packet of data */
harryeakins 7:9f9e2a63a8a2 28 void write(unsigned char* data, unsigned char length);
harryeakins 8:6fc24b44e027 29 void write(unsigned char data); /* 1-byte packet */
harryeakins 8:6fc24b44e027 30 void write(queue<char> &data, int length = -1); /* sends a whole queue */
harryeakins 4:2a295db9ba1a 31
harryeakins 7:9f9e2a63a8a2 32 /* Returns the packet length if data is available in the receive buffer, 0 otherwise*/
harryeakins 7:9f9e2a63a8a2 33 unsigned int available();
harryeakins 0:bd1232f200be 34
harryeakins 6:98da0571ec31 35 protected:
harryeakins 4:2a295db9ba1a 36 /* Receive FIFO buffer */
harryeakins 4:2a295db9ba1a 37 queue<unsigned char> fifo;
harryeakins 4:2a295db9ba1a 38
harryeakins 4:2a295db9ba1a 39 /* SPI module */
harryeakins 0:bd1232f200be 40 SPI spi;
harryeakins 4:2a295db9ba1a 41
harryeakins 4:2a295db9ba1a 42 /* Other digital pins */
harryeakins 0:bd1232f200be 43 DigitalOut NCS;
harryeakins 4:2a295db9ba1a 44 InterruptIn NIRQ;
harryeakins 4:2a295db9ba1a 45 DigitalIn NIRQ_in;
harryeakins 5:a92c3f6d1711 46 DigitalOut rfled;
harryeakins 8:6fc24b44e027 47
harryeakins 8:6fc24b44e027 48 rfmode_t mode;
harryeakins 3:e72ad65868ab 49
harryeakins 2:99cf337cd23e 50 /* Initialises the RF12B module */
harryeakins 3:e72ad65868ab 51 void init();
harryeakins 4:2a295db9ba1a 52
harryeakins 4:2a295db9ba1a 53 /* Write a command to the RF Module */
harryeakins 4:2a295db9ba1a 54 unsigned int writeCmd(unsigned int cmd);
harryeakins 4:2a295db9ba1a 55
harryeakins 4:2a295db9ba1a 56 /* Sends a byte of data across RF */
harryeakins 4:2a295db9ba1a 57 void send(unsigned char data);
harryeakins 4:2a295db9ba1a 58
harryeakins 3:e72ad65868ab 59 /* Switch module between receive and transmit modes */
harryeakins 4:2a295db9ba1a 60 void changeMode(rfmode_t mode);
harryeakins 4:2a295db9ba1a 61
harryeakins 4:2a295db9ba1a 62 /* Interrupt routine for data reception */
harryeakins 4:2a295db9ba1a 63 void rxISR();
harryeakins 4:2a295db9ba1a 64
harryeakins 4:2a295db9ba1a 65 /* Tell the RF Module this packet is received and wait for the next */
harryeakins 4:2a295db9ba1a 66 void resetRX();
harryeakins 5:a92c3f6d1711 67
harryeakins 5:a92c3f6d1711 68 /* Return the RF Module Status word */
harryeakins 5:a92c3f6d1711 69 unsigned int status();
harryeakins 6:98da0571ec31 70
harryeakins 6:98da0571ec31 71 /* Calculate CRC8 */
harryeakins 6:98da0571ec31 72 unsigned char crc8(unsigned char crc, unsigned char data);
harryeakins 0:bd1232f200be 73 };
harryeakins 0:bd1232f200be 74
harryeakins 0:bd1232f200be 75 #endif /* _RF12B_H */