[STM32] 求stm8s103f的SPI程序例子

00050 void SPI_DeInit(void)

00051 {

00052   SPI->CR1    = SPI_CR1_RESET_VALUE;

00053   SPI->CR2    = SPI_CR2_RESET_VALUE;

00054   SPI->ICR    = SPI_ICR_RESET_VALUE;

00055   SPI->SR     = SPI_SR_RESET_VALUE;

00056   SPI->CRCPR  = SPI_CRCPR_RESET_VALUE;

00057 }

00058 

00059 /**

00060   * [url=home.php?mod=space&uid=247401]@brief[/url]  Initializes the SPI according to the specified parameters.

00061   * @param  FirstBit : This parameter can be any of the 

00062   *         [url=home.php?mod=space&uid=144993]@ref[/url] SPI_FirstBit_TypeDef enumeration.

00063   * @param  BaudRatePrescaler : This parameter can be any of the 

00064   *         @ref SPI_BaudRatePrescaler_TypeDef enumeration.

00065   * @param  Mode : This parameter can be any of the  

00066   *         @ref SPI_Mode_TypeDef enumeration.

00067   * @param  ClockPolarity : This parameter can be any of the 

00068   *         @ref SPI_ClockPolarity_TypeDef enumeration.

00069   * @param  ClockPhase : This parameter can be any of the 

00070   *         @ref SPI_ClockPhase_TypeDef enumeration.

00071   * @param  Data_Direction : This parameter can be any of the 

00072   *         @ref SPI_DataDirection_TypeDef enumeration.

00073   * @param  Slave_Management : This parameter can be any of the 

00074   *         @ref SPI_NSS_TypeDef enumeration.

00075   * @param  CRCPolynomial : Configures the CRC polynomial.

00076   * @retval None

00077   */

00078 void SPI_Init(SPI_FirstBit_TypeDef FirstBit, SPI_BaudRatePrescaler_TypeDef BaudRatePrescaler, SPI_Mode_TypeDef Mode, SPI_ClockPolarity_TypeDef ClockPolarity, SPI_ClockPhase_TypeDef ClockPhase, SPI_DataDirection_TypeDef Data_Direction, SPI_NSS_TypeDef Slave_Management, uint8_t CRCPolynomial)

00079 {

00080   /* Check structure elements */

00081   assert_param(IS_SPI_FIRSTBIT_OK(FirstBit));

00082   assert_param(IS_SPI_BAUDRATE_PRESCALER_OK(BaudRatePrescaler));

00083   assert_param(IS_SPI_MODE_OK(Mode));

00084   assert_param(IS_SPI_POLARITY_OK(ClockPolarity));

00085   assert_param(IS_SPI_PHASE_OK(ClockPhase));

00086   assert_param(IS_SPI_DATA_DIRECTION_OK(Data_Direction));

00087   assert_param(IS_SPI_SLAVEMANAGEMENT_OK(Slave_Management));

00088   assert_param(IS_SPI_CRC_POLYNOMIAL_OK(CRCPolynomial));

00089   

00090   /* Frame Format, BaudRate, Clock Polarity and Phase configuration */

00091   SPI->CR1 = (uint8_t)((uint8_t)((uint8_t)FirstBit | BaudRatePrescaler) |

00092                        (uint8_t)((uint8_t)ClockPolarity | ClockPhase));

00093   

00094   /* Data direction configuration: BDM, BDOE and RXONLY bits */

00095   SPI->CR2 = (uint8_t)((uint8_t)(Data_Direction) | (uint8_t)(Slave_Management));

00096   

00097   if (Mode == SPI_MODE_MASTER)

00098   {

00099     SPI->CR2 |= (uint8_t)SPI_CR2_SSI;

00100   }

00101   else

00102   {

00103     SPI->CR2 &= (uint8_t)~(SPI_CR2_SSI);

00104   }

00105   

00106   /* Master/Slave mode configuration */

00107   SPI->CR1 |= (uint8_t)(Mode);

00108   

00109   /* CRC configuration */

00110   SPI->CRCPR = (uint8_t)CRCPolynomial;

00111 }