cc1100-cc2500.c

通过CC2500无线射频芯片接收无线数据

#include "include.h"
#include "TI_CC_CC1100-CC2500.h"

#define TI_CC_RF_FREQ  2400  // 315, 433, 868, 915, 2400




#if TI_CC_RF_FREQ == 2400                          // 2.4GHz

void writeRFSettings(void)
{
    // Write register settings
    TI_CC_SPIWriteReg(TI_CCxxx0_IOCFG2,   0x0B);  // GDO2 output pin config.
    TI_CC_SPIWriteReg(TI_CCxxx0_IOCFG0,   0x06);  // GDO0 output pin config.
    TI_CC_SPIWriteReg(TI_CCxxx0_PKTLEN,   0xFF);  // Packet length.
    TI_CC_SPIWriteReg(TI_CCxxx0_PKTCTRL1, 0x05);  // Packet automation control.
    TI_CC_SPIWriteReg(TI_CCxxx0_PKTCTRL0, 0x05);  // Packet automation control.
    TI_CC_SPIWriteReg(TI_CCxxx0_ADDR,     0x02);  // Device address.
    TI_CC_SPIWriteReg(TI_CCxxx0_CHANNR,   0x00); // Channel number.
    TI_CC_SPIWriteReg(TI_CCxxx0_FSCTRL1,  0x07); // Freq synthesizer control.
    TI_CC_SPIWriteReg(TI_CCxxx0_FSCTRL0,  0x00); // Freq synthesizer control.
    TI_CC_SPIWriteReg(TI_CCxxx0_FREQ2,    0x5D); // Freq control word, high byte
    TI_CC_SPIWriteReg(TI_CCxxx0_FREQ1,    0x93); // Freq control word, mid byte.
    TI_CC_SPIWriteReg(TI_CCxxx0_FREQ0,    0xB1); // Freq control word, low byte.
    TI_CC_SPIWriteReg(TI_CCxxx0_MDMCFG4,  0x2D); // Modem configuration.
    TI_CC_SPIWriteReg(TI_CCxxx0_MDMCFG3,  0x3B); // Modem configuration.
    TI_CC_SPIWriteReg(TI_CCxxx0_MDMCFG2,  0x73); // Modem configuration.
    TI_CC_SPIWriteReg(TI_CCxxx0_MDMCFG1,  0x22); // Modem configuration.
    TI_CC_SPIWriteReg(TI_CCxxx0_MDMCFG0,  0xF8); // Modem configuration.
    TI_CC_SPIWriteReg(TI_CCxxx0_DEVIATN,  0x00); // Modem dev (when FSK mod en)
    TI_CC_SPIWriteReg(TI_CCxxx0_MCSM1 ,   0x30); //MainRadio Cntrl State Machine
    TI_CC_SPIWriteReg(TI_CCxxx0_MCSM0 ,   0x19); //MainRadio Cntrl State Machine
    TI_CC_SPIWriteReg(TI_CCxxx0_FOCCFG,   0x1D); // Freq Offset Compens. Config
    TI_CC_SPIWriteReg(TI_CCxxx0_BSCFG,    0x1C); //  Bit synchronization config.
    TI_CC_SPIWriteReg(TI_CCxxx0_AGCCTRL2, 0xC7); // AGC control.
    TI_CC_SPIWriteReg(TI_CCxxx0_AGCCTRL1, 0x00); // AGC control.
    TI_CC_SPIWriteReg(TI_CCxxx0_AGCCTRL0, 0xB2); // AGC control.
    TI_CC_SPIWriteReg(TI_CCxxx0_FREND1,   0xB6); // Front end RX configuration.
    TI_CC_SPIWriteReg(TI_CCxxx0_FREND0,   0x10); // Front end RX configuration.
    TI_CC_SPIWriteReg(TI_CCxxx0_FSCAL3,   0xEA); // Frequency synthesizer cal.
    TI_CC_SPIWriteReg(TI_CCxxx0_FSCAL2,   0x0A); // Frequency synthesizer cal.
    TI_CC_SPIWriteReg(TI_CCxxx0_FSCAL1,   0x00); // Frequency synthesizer cal.
    TI_CC_SPIWriteReg(TI_CCxxx0_FSCAL0,   0x11); // Frequency synthesizer cal.
    TI_CC_SPIWriteReg(TI_CCxxx0_FSTEST,   0x59); // Frequency synthesizer cal.
    TI_CC_SPIWriteReg(TI_CCxxx0_TEST2,    0x88); // Various test settings.
    TI_CC_SPIWriteReg(TI_CCxxx0_TEST1,    0x31); // Various test settings.
    TI_CC_SPIWriteReg(TI_CCxxx0_TEST0,    0x0B);  // Various test settings.
}

// PATABLE (0 dBm output power)
extern char paTable[] = {0xFB};
extern char paTableLen = 1;

#endif





char RFReceivePacket(char *rxBuffer, char *length)
{
  char status[2];
  char pktLen;

  if ((TI_CC_SPIReadStatus(TI_CCxxx0_RXBYTES) & 0x007F))
  {
    pktLen = TI_CC_SPIReadReg(TI_CCxxx0_RXFIFO); // Read length byte

    if (pktLen <= *length)                  // If pktLen size <= rxBuffer
    {
      TI_CC_SPIReadBurstReg(TI_CCxxx0_RXFIFO, rxBuffer, pktLen); // Pull data
      *length = pktLen;                     // Return the actual size
      TI_CC_SPIReadBurstReg(TI_CCxxx0_RXFIFO, status, 2);
                                            // Read appended status bytes
      return (char)(status[TI_CCxxx0_LQI_RX]&0x0080);
    }                                       // Return CRC_OK bit
    else
    {
      *length = pktLen;                     // Return the large size
      TI_CC_SPIStrobe(TI_CCxxx0_SFRX);      // Flush RXFIFO
      return 0;                             // Error
    }
  }
  else
      return 0;                             // Error
}