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@7:9f9e2a63a8a2, 2011-03-11 (annotated)

Committer:
harryeakins
Date:
Fri Mar 11 19:30:30 2011 +0000
Revision:
7:9f9e2a63a8a2
Parent:
6:98da0571ec31
Child:
8:6fc24b44e027
Including madcowswe\s changes

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 #define PACKET_LEN 16
harryeakins 4:2a295db9ba1a 8
harryeakins 4:2a295db9ba1a 9 enum rfmode_t{RX, TX};
harryeakins 0:bd1232f200be 10
harryeakins 0:bd1232f200be 11 class RF12B {
harryeakins 0:bd1232f200be 12 public:
harryeakins 4:2a295db9ba1a 13 /* Constructor */
harryeakins 0:bd1232f200be 14 RF12B(PinName SDI,
harryeakins 2:99cf337cd23e 15 PinName SDO,
harryeakins 2:99cf337cd23e 16 PinName SCK,
harryeakins 2:99cf337cd23e 17 PinName NCS,
harryeakins 2:99cf337cd23e 18 PinName NIRQ);
harryeakins 7:9f9e2a63a8a2 19
harryeakins 7:9f9e2a63a8a2 20
harryeakins 7:9f9e2a63a8a2 21
harryeakins 7:9f9e2a63a8a2 22 /* Reads a packet of data. Returns false if read failed. Use available() to check how much space to allocate for buffer */
harryeakins 7:9f9e2a63a8a2 23 bool read(unsigned char* data, unsigned int size);
harryeakins 2:99cf337cd23e 24
harryeakins 4:2a295db9ba1a 25 /* Reads a byte of data from the receive buffer
harryeakins 4:2a295db9ba1a 26 Returns 0xFF if there is no data */
harryeakins 0:bd1232f200be 27 unsigned char read();
harryeakins 2:99cf337cd23e 28
harryeakins 4:2a295db9ba1a 29 /* Transmits a packet of data */
harryeakins 7:9f9e2a63a8a2 30 void write(unsigned char* data, unsigned char length);
harryeakins 4:2a295db9ba1a 31
harryeakins 4:2a295db9ba1a 32 /* Transmits a 1-byte packet of data */
harryeakins 4:2a295db9ba1a 33 void write(unsigned char data);
harryeakins 4:2a295db9ba1a 34
harryeakins 7:9f9e2a63a8a2 35 /* Returns the packet length if data is available in the receive buffer, 0 otherwise*/
harryeakins 7:9f9e2a63a8a2 36 unsigned int available();
harryeakins 0:bd1232f200be 37
harryeakins 6:98da0571ec31 38 protected:
harryeakins 4:2a295db9ba1a 39 /* Receive FIFO buffer */
harryeakins 4:2a295db9ba1a 40 queue<unsigned char> fifo;
harryeakins 4:2a295db9ba1a 41
harryeakins 4:2a295db9ba1a 42 /* SPI module */
harryeakins 0:bd1232f200be 43 SPI spi;
harryeakins 4:2a295db9ba1a 44
harryeakins 4:2a295db9ba1a 45 /* Other digital pins */
harryeakins 0:bd1232f200be 46 DigitalOut NCS;
harryeakins 4:2a295db9ba1a 47 InterruptIn NIRQ;
harryeakins 4:2a295db9ba1a 48 DigitalIn NIRQ_in;
harryeakins 5:a92c3f6d1711 49 DigitalOut rfled;
harryeakins 3:e72ad65868ab 50
harryeakins 2:99cf337cd23e 51 /* Initialises the RF12B module */
harryeakins 3:e72ad65868ab 52 void init();
harryeakins 4:2a295db9ba1a 53
harryeakins 4:2a295db9ba1a 54 /* Write a command to the RF Module */
harryeakins 4:2a295db9ba1a 55 unsigned int writeCmd(unsigned int cmd);
harryeakins 4:2a295db9ba1a 56
harryeakins 4:2a295db9ba1a 57 /* Sends a byte of data across RF */
harryeakins 4:2a295db9ba1a 58 void send(unsigned char data);
harryeakins 4:2a295db9ba1a 59
harryeakins 3:e72ad65868ab 60 /* Switch module between receive and transmit modes */
harryeakins 4:2a295db9ba1a 61 void changeMode(rfmode_t mode);
harryeakins 4:2a295db9ba1a 62
harryeakins 4:2a295db9ba1a 63 /* Interrupt routine for data reception */
harryeakins 4:2a295db9ba1a 64 void rxISR();
harryeakins 4:2a295db9ba1a 65
harryeakins 4:2a295db9ba1a 66 /* Tell the RF Module this packet is received and wait for the next */
harryeakins 4:2a295db9ba1a 67 void resetRX();
harryeakins 5:a92c3f6d1711 68
harryeakins 5:a92c3f6d1711 69 /* Return the RF Module Status word */
harryeakins 5:a92c3f6d1711 70 unsigned int status();
harryeakins 6:98da0571ec31 71
harryeakins 6:98da0571ec31 72 /* Calculate CRC8 */
harryeakins 6:98da0571ec31 73 unsigned char crc8(unsigned char crc, unsigned char data);
harryeakins 0:bd1232f200be 74 };
harryeakins 0:bd1232f200be 75
harryeakins 0:bd1232f200be 76 #endif /* _RF12B_H */