void InitSpi(void)
{
EALLOW;
//spi
GpioMuxRegs.GPFMUX.bit.***=1;
GpioMuxRegs.GPFMUX.bit.SPISIMOA_GPIOF0=1;
GpioMuxRegs.GPFMUX.bit.SPISOMIA_GPIOF1=1;
GpioMuxRegs.GPFMUX.bit.SPISTEA_GPIOF3=1;
EDIS;
// Initialize SPI-A:
SpiaRegs.***.all=0x07;
SpiaRegs.***.all=0x01;
SpiaRegs.SPIBRR=24;
SpiaRegs.SPISTS.all=0;
SpiaRegs.SPIPRI.bit.FREE=1;
SpiaRegs.***.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;
}
}
}
}
spist=0x00c0; 老是溢出怎么回事
接收波形
