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2812 spi slave

2013-06-19 分类：C2000™ 32位实时 MCU 阅读(344)

void InitSpi(void)
{
EALLOW;
//spi
GpioMuxRegs.GPFMUX.bit.SPICLKA_GPIOF2=1;
GpioMuxRegs.GPFMUX.bit.SPISIMOA_GPIOF0=1;
GpioMuxRegs.GPFMUX.bit.SPISOMIA_GPIOF1=1;
GpioMuxRegs.GPFMUX.bit.SPISTEA_GPIOF3=1;
EDIS;

// Initialize SPI-A:
   SpiaRegs.SPICCR.all=0x07;
   SpiaRegs.SPICTL.all=0x01;
   SpiaRegs.SPIBRR=24;
   SpiaRegs.SPISTS.all=0;
   SpiaRegs.SPIPRI.bit.FREE=1;
   SpiaRegs.SPICCR.all=0x87;
//tbd…
}

void main()
{
uchar j=0;
InitSysCtrl();
DINT;
IER=0x0000;
IFR=0x0000;
InitPieCtrl();
InitPieVectTable();
InitPeripherals();
InitGpio();
EINT;
ERTM;
j=0;
SpiaRegs.SPISTS.all=0;
while(1)
{
  while(SpiaRegs.SPISTS.bit.INT_FLAG==0);
  if(SpiaRegs.SPIRXBUF==0x1122)
   sp_flag=1;
  if(sp_flag==1)
  {
   sp_data[j++]=SpiaRegs.SPIRXBUF;
   if(j==5)
   {
     j=0;sp_flag=0;
   }
  }
}
}