Diff: RF12B.h
- Revision:
- 0:525cb1ac9f1f
diff -r 000000000000 -r 525cb1ac9f1f RF12B.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RF12B.h Mon Mar 19 18:00:11 2012 +0000 @@ -0,0 +1,75 @@ +#ifndef _RF12B_H +#define _RF12B_H + +#include "mbed.h" +#include <queue> + +enum rfmode_t{RX, TX}; + +class RF12B { +public: + /* Constructor */ + RF12B(PinName SDI, + PinName SDO, + PinName SCK, + PinName NCS, + PinName NIRQ); + + + + /* Reads a packet of data. Returns false if read failed. Use available() to check how much space to allocate for buffer */ + bool read(unsigned char* data, unsigned int size); + + /* Reads a byte of data from the receive buffer + Returns 0xFF if there is no data */ + unsigned char read(); + + /* Transmits a packet of data */ + void write(unsigned char* data, unsigned char length); + void write(unsigned char data); /* 1-byte packet */ + void write(queue<char> &data, int length = -1); /* sends a whole queue */ + + /* Returns the packet length if data is available in the receive buffer, 0 otherwise*/ + unsigned int available(); + +protected: + /* Receive FIFO buffer */ + queue<unsigned char> fifo; + + /* SPI module */ + SPI spi; + + /* Other digital pins */ + DigitalOut NCS; + InterruptIn NIRQ; + DigitalIn NIRQ_in; + DigitalOut rfled; + + rfmode_t mode; + + /* Initialises the RF12B module */ + void init(); + + /* Write a command to the RF Module */ + unsigned int writeCmd(unsigned int cmd); + + /* Sends a byte of data across RF */ + void send(unsigned char data); + + /* Switch module between receive and transmit modes */ + void changeMode(rfmode_t mode); + + /* Interrupt routine for data reception */ + void rxISR(); + + /* Tell the RF Module this packet is received and wait for the next */ + void resetRX(); + + /* Return the RF Module Status word */ + unsigned int status(); + + /* Calculate CRC8 */ + unsigned char crc8(unsigned char crc, unsigned char data); +}; + +#endif /* _RF12B_H */ \ No newline at end of file