STM8S105 SPI 初始化

以下驅動是SPI2的應用

 

static void MMC_SPI_Config(void)
{
 SPI_DeInit();

 GPIO_Init(GPIOC, GPIO_PIN_2, GPIO_MODE_OUT_PP_HIGH_FAST);

 GPIO_Init(GPIOC, GPIO_PIN_4, GPIO_MODE_IN_FL_NO_IT);

 GPIO_Init(GPIOE, GPIO_PIN_5, GPIO_MODE_OUT_PP_HIGH_FAST);

 SPI_Init(SPI_FIRSTBIT_MSB, SPI_BAUDRATEPRESCALER_256, SPI_MODE_MASTER
 , SPI_CLOCKPOLARITY_HIGH, SPI_CLOCKPHASE_2EDGE,
 SPI_DATADIRECTION_2LINES_FULLDUPLEX, SPI_NSS_SOFT,0x00);
 SPI_Cmd(ENABLE); 
}

static
UCHAR SPI_ReadWrite_Byte(unsigned char byte)
{
 /* Loop while DR register in not emplty */
 while(SPI_GetFlagStatus(SPI_FLAG_TXE) == RESET);

 /* Send byte through the SPI1 peripheral */
 SPI_SendData(byte);

 /* Wait to receive a byte */
 while(SPI_GetFlagStatus(SPI_FLAG_RXNE) == RESET);

 /* Return the byte read from the SPI bus */
 return SPI_ReceiveData();
}