uint8 SPI_ReadBit(void)
{
SCACLK_H;
SPI_Delay(10);
SCACLK_L;
SPI_Delay(10);
return SCAOUT_D;
}
void SPI_WriteByte(uint8 wdata )
{
uint8 i;
for( i = 0 ; i < 8 ; ++i ){
SCACLK_L;
SPI_Delay(10);
if(wdata & 0x80)SCAIN_H;else SCAIN_L;
wdata = wdata << 1;
SPI_Delay(10);
SCACLK_H;
SPI_Delay(10);
}
SCACLK_L;
}
uint16 SPI_ReadBits(uint8 n )
{
uint16 rtemp=0,i;
for( i = 0 ; i < n ; i++ ){ ;
SPI_Delay(10);
rtemp<<=1;
if( SCAOUT_D == 1 ){
rtemp++;
}else{
}
SCACLK_H;
SPI_Delay(10);
SCACLK_L;
SPI_Delay(10);
}
return rtemp;
}
void SPI_Start(void){
SCACLK_L;
SCACS_L;
SPI_Delay(10);
}
void SPI_Stop()
{
SCACLK_L;
SCACS_H;
SPI_Delay(10);
}
/**
* @brief Deactivate SPI slave module by driving CS line high
*
* @return void
*/
void SPI_CS_Deactivate(){
SPI_Delay();
GPIO_SpiSetCS();
}
/**
* @brief Activate SPI slave module by driving CS line low
*
* @return void
*/
void SPI_CS_Activate(){
GPIO_SpiClrCS();
SPI_Delay();
}