File content as of revision 6:98da0571ec31:

#ifndef _RF12B_H
#define _RF12B_H

#include "mbed.h"
#include <queue>

#define PACKET_LEN 16

enum rfmode_t{RX, TX};

class RF12B {
public:
    /* Constructor */
    RF12B(PinName SDI,
          PinName SDO,
          PinName SCK,
          PinName NCS,
          PinName NIRQ);

    /* 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);
    
    /* Transmits a 1-byte packet of data */
    void write(unsigned char data);
    
    /* Returns true if data is available in the receive buffer*/
    bool 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;

    /* 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 */