/**
* @brief Initializes the SPIx peripheral according to the specified
* parameters in the SPI_InitStruct.
* @param SPIx: where x can be 1 or 2 to select the SPI peripheral.
* @param SPI_InitStruct: pointer to a SPI_InitTypeDef structure that
* contains the configuration information for the specified SPI peripheral.
* @retval None
*/
void SPI_Init(SPI_TypeDef* SPIx, SPI_InitTypeDef* SPI_InitStruct)
{
uint16_t tmpreg = 0;
/* check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
/* Check the SPI parameters */
assert_param(IS_SPI_DIRECTION_MODE(SPI_InitStruct->SPI_Direction));
assert_param(IS_SPI_MODE(SPI_InitStruct->SPI_Mode));
assert_param(IS_SPI_DATA_SIZE(SPI_InitStruct->SPI_DataSize));
assert_param(IS_SPI_CPOL(SPI_InitStruct->SPI_CPOL));
assert_param(IS_SPI_CPHA(SPI_InitStruct->SPI_CPHA));
assert_param(IS_SPI_NSS(SPI_InitStruct->SPI_NSS));
assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_InitStruct->SPI_BaudRatePrescaler));
assert_param(IS_SPI_FIRST_BIT(SPI_InitStruct->SPI_FirstBit));
assert_param(IS_SPI_CRC_POLYNOMIAL(SPI_InitStruct->SPI_CRCPolynomial));
/*---------------------------- SPIx CR1 Configuration ------------------------*/
/* Get the SPIx CR1 value */
tmpreg = SPIx->CR1;
/* Clear BIDIMode, BIDIOE, RxONLY, SSM, SSI, LSBFirst, BR, CPOL and CPHA bits */
tmpreg &= CR1_CLEAR_MASK;
/* Configure SPIx: direction, NSS management, first transmitted bit, BaudRate prescaler
master/slave mode, CPOL and CPHA */
/* Set BIDImode, BIDIOE and RxONLY bits according to SPI_Direction value */
/* Set SSM, SSI bit according to SPI_NSS values */
/* Set LSBFirst bit according to SPI_FirstBit value */
/* Set BR bits according to SPI_BaudRatePrescaler value */
/* Set CPOL bit according to SPI_CPOL value */
/* Set CPHA bit according to SPI_CPHA value */
tmpreg |= (uint16_t)((uint32_t)SPI_InitStruct->SPI_Direction | SPI_InitStruct->SPI_FirstBit |
SPI_InitStruct->SPI_CPOL | SPI_InitStruct->SPI_CPHA |
SPI_InitStruct->SPI_NSS | SPI_InitStruct->SPI_BaudRatePrescaler);
/* Write to SPIx CR1 */
SPIx->CR1 = tmpreg;
/*-------------------------Data Size Configuration -----------------------*/
/* Get the SPIx CR2 value */
tmpreg = SPIx->CR2;
/* Clear DS[3:0] bits */
tmpreg &=(uint16_t)~SPI_CR2_DS;
/* Configure SPIx: Data Size */
tmpreg |= (uint16_t)(SPI_InitStruct->SPI_DataSize);
/* Write to SPIx CR2 */
SPIx->CR2 = tmpreg;
/*---------------------------- SPIx CRCPOLY Configuration --------------------*/
/* Write to SPIx CRCPOLY */
SPIx->CRCPR = SPI_InitStruct->SPI_CRCPolynomial;
/*---------------------------- SPIx CR1 Configuration ------------------------*/
/* Get the SPIx CR1 value */
tmpreg = SPIx->CR1;
/* Clear MSTR bit */
tmpreg &= CR1_CLEAR_MASK2;
/* Configure SPIx: master/slave mode */
/* Set MSTR bit according to SPI_Mode */
tmpreg |= (uint16_t)((uint32_t)SPI_InitStruct->SPI_Mode);
/* Write to SPIx CR1 */
SPIx->CR1 = tmpreg;
/* Activate the SPI mode (Reset I2SMOD bit in I2SCFGR register) */
SPIx->I2SCFGR &= (uint16_t)~((uint16_t)SPI_I2SCFGR_I2SMOD);
}
/**
* @brief Initializes the SPI according to the specified parameters
* in the SPI_InitTypeDef and create the associated handle.
* @param hspi: pointer to a SPI_HandleTypeDef structure that contains
* the configuration information for SPI module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_SPI_Init(SPI_HandleTypeDef *hspi)
{
/* Check the SPI handle allocation */
if(hspi == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_SPI_ALL_INSTANCE(hspi->Instance));
assert_param(IS_SPI_MODE(hspi->Init.Mode));
assert_param(IS_SPI_DIRECTION_MODE(hspi->Init.Direction));
assert_param(IS_SPI_DATASIZE(hspi->Init.DataSize));
assert_param(IS_SPI_CPOL(hspi->Init.CLKPolarity));
assert_param(IS_SPI_CPHA(hspi->Init.CLKPhase));
assert_param(IS_SPI_NSS(hspi->Init.NSS));
assert_param(IS_SPI_BAUDRATE_PRESCALER(hspi->Init.BaudRatePrescaler));
assert_param(IS_SPI_FIRST_BIT(hspi->Init.FirstBit));
assert_param(IS_SPI_TIMODE(hspi->Init.TIMode));
assert_param(IS_SPI_CRC_CALCULATION(hspi->Init.CRCCalculation));
assert_param(IS_SPI_CRC_POLYNOMIAL(hspi->Init.CRCPolynomial));
if(hspi->State == HAL_SPI_STATE_RESET)
{
/* Init the low level hardware : GPIO, CLOCK, NVIC... */
HAL_SPI_MspInit(hspi);
}
hspi->State = HAL_SPI_STATE_BUSY;
/* Disble the selected SPI peripheral */
__HAL_SPI_DISABLE(hspi);
/*----------------------- SPIx CR1 & CR2 Configuration ---------------------*/
/* Configure : SPI Mode, Communication Mode, Data size, Clock polarity and phase, NSS management,
Communication speed, First bit and CRC calculation state */
WRITE_REG(hspi->Instance->CR1, (hspi->Init.Mode | hspi->Init.Direction | hspi->Init.DataSize |
hspi->Init.CLKPolarity | hspi->Init.CLKPhase | (hspi->Init.NSS & SPI_CR1_SSM) |
hspi->Init.BaudRatePrescaler | hspi->Init.FirstBit | hspi->Init.CRCCalculation) );
/* Configure : NSS management */
WRITE_REG(hspi->Instance->CR2, (((hspi->Init.NSS >> 16) & SPI_CR2_SSOE) | hspi->Init.TIMode));
/*---------------------------- SPIx CRCPOLY Configuration ------------------*/
/* Configure : CRC Polynomial */
WRITE_REG(hspi->Instance->CRCPR, hspi->Init.CRCPolynomial);
#if defined (STM32F101x6) || defined (STM32F101xB) || defined (STM32F101xE) || defined (STM32F101xG) || defined (STM32F102x6) || defined (STM32F102xB) || defined (STM32F103x6) || defined (STM32F103xB) || defined (STM32F103xE) || defined (STM32F103xG) || defined (STM32F105xC) || defined (STM32F107xC)
/* Activate the SPI mode (Make sure that I2SMOD bit in I2SCFGR register is reset) */
CLEAR_BIT(hspi->Instance->I2SCFGR, SPI_I2SCFGR_I2SMOD);
#endif
#if defined (STM32F101xE) || defined (STM32F103xE)
/* Check RevisionID value for identifying if Device is Rev Z (0x0001) in order to enable workaround for
CRC errors wrongly detected */
/* Pb is that ES_STM32F10xxCDE also identify an issue in Debug registers access while not in Debug mode.
Revision ID information is only available in Debug mode, so Workaround could not be implemented
to distinguish Rev Z devices (issue present) from more recent version (issue fixed).
So, in case of Revison Z F101 or F103 devices, below variable should be assigned to 1 */
uCRCErrorWorkaroundCheck = 0;
#else
uCRCErrorWorkaroundCheck = 0;
#endif
hspi->ErrorCode = HAL_SPI_ERROR_NONE;
hspi->State = HAL_SPI_STATE_READY;
return HAL_OK;
}