ccxx.c

ipod无线遥控接收端,可控制播放,暂停,音量,前进,后退.

#include "hal.h"


BYTE rfSettings[]= {
    0x06,   // IOCFG2          Y
    0x2E,   // IOCFG1          Y
    0x06,   // IOCFG0D         Y
    0x07,   // FIFOTHR         Y
    0xD3,   // SYNC1           Y
    0x91,   // SYNC0           Y
    0x02,   // PKTLEN          Y   0xFF
    0x04,   // pktctrl1 
    0x04,   // pktctrl0            0x05  fixed length
    0x00,   // addr            Y
    0x00,   // CHANNR          Y
    0x0A,   // FSCTRL1   Frequency synthesizer control.0X17 0x0c
    0x00,   // FSCTRL0   Frequency synthesizer control.
    0x5D,   // FREQ2     Frequency control word, high byte.
    0x93,   // FREQ1     Frequency control word, middle byte.
    0xB1,   // FREQ0     Frequency control word, low byte.
    0x78,   // MDMCFG4   Modem configuration. x2D 0x0e
    0x93,   // MDMCFG3   Modem configuration.
    0x03,   // MDMCFG2   Modem configuration.
    0x02,   // MDMCFG1   Modem configuration.
    0xF8,   // MDMCFG0   Modem configuration.
    0x44,   // DEVIATN   Modem deviation setting (when FSK modulation is enabled).
    0x07,   // MCSM2
    0x00,   // MCSM1
    0x18,   // MCSM0     Main Radio Control State Machine configuration.
    0x16,   // FOCCFG    Frequency Offset Compensation Configuration.
    0x6C,   // BSCFG     Bit synchronization Configuration.
    0x43,   // AGCCTRL2  AGC control.
    0x40,   // AGCCTRL1  AGC control.
    0x91,   // AGCCTRL0  AGC control.
    0x87,   // WOREVT1
    0x6b,   // WOREVT0
    0xf8,   // WORCTRL
    0x56,   // FREND1    Front end RX configuration.
    0x10,   // FREND0    Front end RX configuration.
    0xA9,   // FSCAL3    Frequency synthesizer calibration.
    0x0A,   // FSCAL2    Frequency synthesizer calibration.
    0x00,   // FSCAL1    Frequency synthesizer calibration.
    0x11,   // FSCAL0    Frequency synthesizer calibration.(38)
    0x41,   // RCCTRL1          Y
    0x00,   // RCCTRL0          Y
    0x59,   // FSTEST           Y
    0x7F,   // PTEST            Y
    0x3F,   // AGCTEST          Y      
    0x88,   // TEST2           Y
    0x31,   // TEST1           Y
    0x0B    // TEST0           Y
};




/*
*********************************************************************************************************
*                                         CCxx_init
*
* Description      :
* Arguments        :
* Returned Values  : none
* Note(s)/Warnings :
*********************************************************************************************************
*/
void CCxx_init(void)
{
    BYTE RfPa[8] = {0xFF ,0xFF ,0xFF ,0xFF ,0xFF ,0xFF ,0xFF ,0xFF}; 
    SET_CSN;
    Pause_10uS(4);  
    CLR_CSN;
    Pause_10uS(4);
    SET_CSN;
    Pause_10uS(6);
    CLR_CSN;
    while (SOREAD); 
    SpiStrobe(CCxxx0_SRES);  
    SET_CSN;    
    
    SpiWriteBurstReg(0x00,rfSettings,0x2F);
	SpiWriteBurstReg(CCxxx0_PATABLE, RfPa, 1);
}

/*
*********************************************************************************************************
*                                        CCxx_send
*
* Description      :
* Arguments        :
* Returned Values  : none
* Note(s)/Warnings :
*********************************************************************************************************
*/
void CCxx_send(BYTE *buf, BYTE n) 
{
    SpiWriteBurstReg(CCxxx0_TXFIFO, buf, n);
    SpiStrobe(CCxxx0_STX);
    while (!GDO2READ); 
    while (GDO2READ);   
}

/*
*********************************************************************************************************
*                                         CCxx_receive
*
* Description      :
* Arguments        :
* Returned Values  : none
* Note(s)/Warnings :
*********************************************************************************************************
*/
BOOL CCxx_receive(BYTE *buf, BYTE *n) 
{
    BYTE status[2];
  
    SpiStrobe(CCxxx0_SRX);
    while (!GDO2READ);
    while (GDO2READ);
    
    if ((SpiReadStatus(CCxxx0_RXBYTES) & BYTES_IN_RXFIFO)) {
       SpiReadBurstReg(CCxxx0_RXFIFO, buf, 2); 
       SpiReadBurstReg(CCxxx0_RXFIFO, status, 2); 
       return (status[LQI] & CRC_OK);
    }else{
        return 0;
    }
}