// radio.h/*********************************************************************** * *    Author: Greg Hunter *    Company: UTS *    Filenames:      radio.h, radio.c *    Date:           2007/9/6 *    File Version:   0.01 *    Other Files Required:  *    Tools Used: Micro-IDE        -> 2.16m *                SDCC C Compiler  -> 1.2 * *    Devices Supported: *                nRF24E1 * *********************************************************************** * * Description: *  Routines to configure the radio * **********************************************************************/#ifndef Radio_h#define Radio_h// C API for radio.ctypedef struct  {  // Radio Configuration Buffer:    unsigned char Data2;          //length of data payload RX channel 2    unsigned char Data1;          //length of data payload RX channel 1    unsigned char Addr2s;         //top unused byte of address 2    unsigned char  Addr2c3;       //address for RX channel 2, byte 3    unsigned char  Addr2c2;       //address for RX channel 2, byte 2    unsigned char  Addr2c1;       //address for RX channel 2, byte 1    unsigned char  Addr2c0;       //address for RX channel 2, byte 0    unsigned char Addr1s;         //top unused byte of address 1    unsigned char  Addr1c3;       //address for RX channel 1, byte 3    unsigned char  Addr1c2;       //address for RX channel 1, byte 2    unsigned char  Addr1c1;       //address for RX channel 1, byte 1    unsigned char  Addr1c0;       //address for RX channel 1, byte 0    unsigned char AddCrc;         //address length (6 bits), 8 or 16 bit CRC (1 bit) & CRC enable (1 bit)    unsigned char Control;        //bits to control radio:                                  //7: RX2_EN   Enable 2 channel receive mode                                  //6: CM       Direct or Shockburst                                  //5: RFDR_SB  RF data rate, 1Mbps or 250kbps                                  //2-4: XO_F     Crystal frequency                                  //0-1: RF_POWER RF power output    unsigned char ChnRxTx;        //channel select and RxTx switch                                  //1-7: RF_CH#   Frequency channel                                  //0: RXEN     RX or TX operation  }  tRadioParm;#define RADIO_CFG_BYTES 15 //number of configuration bytes#define RadioCfgBufPt &RadioParm.Data2 //start of configuration blockextern  tRadioParm RadioParm;void RadioInit(void);               // Initialising routine to initialise data buffersvoid RadioOn(void);                 // Turn on radio and load configurationvoid RadioCfg(void);                // Load configuration only#define RadioOff() PWR_UP = 0       // Turn radio offvoid RadioTXBuf(unsigned char *bufPt, unsigned char bytes); // Transmit data in buffer bufPt of length bytes and switch to RX mode                                        //  Note for timing it takes 700us for reciever to be ready after a packet is transmitted                                        //  so the receiving unit should wait 700us before trasmitting a replyunsigned char RadioRXBuf(unsigned char *bufPt);    // Receive wheelchair data and load into bufPt buffer                                    //returns 1 if packet received, 0 otherwise// Example C API for data transmit and receive buffers.  This shows a buffer size of 14 bytes.typedef struct  {// Data transmit buffer:    unsigned char TXAddress3;   //byte 3 of address of head unit    unsigned char TXAddress2;   //byte 2    unsigned char TXAddress1;   //byte 1    unsigned char TXAddress0;   //byte 0    unsigned char adcData;    unsigned char t1;    unsigned char t2;    unsigned char t3;    unsigned char t4;    unsigned char t5;    unsigned char t6;    unsigned char t7;    unsigned char t8;    unsigned char t9;    unsigned char t10;    unsigned char t11;    unsigned char t12;    unsigned char t13;// Data receive buffer:    unsigned char pwmData;    unsigned char d1;    unsigned char d2;    unsigned char d3;    unsigned char d4;    unsigned char d5;    unsigned char d6;    unsigned char d7;    unsigned char d8;    unsigned char d9;    unsigned char d10;    unsigned char d11;    unsigned char d12;    unsigned char d13;  }  tComParm;#define COM_TX_BYTES 18 //number of data transmit buffer bytes#define ComTXBufPt (&ComParm.TXAddress3) //start of data transmit buffer#define COM_RX_BYTES 14 //number of receive buffer bytes#define ComRXBufPt (&ComParm.pwmData) //start of receive bufferextern  tComParm ComParm;#endif