/**
* @brief Set the RXFIFO threshold.
* @param husart USART handle.
* @param Threshold RX FIFO threshold value
* This parameter can be one of the following values:
* @arg @ref USART_RXFIFO_THRESHOLD_1_8
* @arg @ref USART_RXFIFO_THRESHOLD_1_4
* @arg @ref USART_RXFIFO_THRESHOLD_1_2
* @arg @ref USART_RXFIFO_THRESHOLD_3_4
* @arg @ref USART_RXFIFO_THRESHOLD_7_8
* @arg @ref USART_RXFIFO_THRESHOLD_8_8
* @retval HAL status
*/
HAL_StatusTypeDef HAL_USARTEx_SetRxFifoThreshold(USART_HandleTypeDef *husart, uint32_t Threshold)
{
uint32_t tmpcr1 = 0;
/* Check the parameters */
assert_param(IS_UART_FIFO_INSTANCE(husart->Instance));
assert_param(IS_USART_RXFIFO_THRESHOLD(Threshold));
/* Process Locked */
__HAL_LOCK(husart);
husart->State = HAL_USART_STATE_BUSY;
/* Save actual USART configuration */
tmpcr1 = READ_REG(husart->Instance->CR1);
/* Disable USART */
__HAL_USART_DISABLE(husart);
/* Update RX threshold configuration */
MODIFY_REG(husart->Instance->CR3, USART_CR3_RXFTCFG, Threshold);
/* Determine the number of data to process during RX/TX ISR execution */
USARTEx_SetNbDataToProcess(husart);
/* Restore USART configuration */
WRITE_REG(husart->Instance->CR1, tmpcr1);
husart->State = HAL_USART_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(husart);
return HAL_OK;
}
/**
* @brief Disable the FIFO mode.
* @param husart USART handle.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_USARTEx_DisableFifoMode(USART_HandleTypeDef *husart)
{
uint32_t tmpcr1 = 0;
/* Check parameters */
assert_param(IS_UART_FIFO_INSTANCE(husart->Instance));
/* Process Locked */
__HAL_LOCK(husart);
husart->State = HAL_USART_STATE_BUSY;
/* Save actual USART configuration */
tmpcr1 = READ_REG(husart->Instance->CR1);
/* Disable USART */
__HAL_USART_DISABLE(husart);
/* Enable FIFO mode */
CLEAR_BIT(tmpcr1, USART_CR1_FIFOEN);
husart->FifoMode = USART_FIFOMODE_DISABLE;
/* Restore USART configuration */
WRITE_REG(husart->Instance->CR1, tmpcr1);
husart->State = HAL_USART_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(husart);
return HAL_OK;
}
/**
* @brief Enable the FIFO mode.
* @param husart USART handle.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_USARTEx_EnableFifoMode(USART_HandleTypeDef *husart)
{
uint32_t tmpcr1 = 0;
/* Check parameters */
assert_param(IS_UART_FIFO_INSTANCE(husart->Instance));
/* Process Locked */
__HAL_LOCK(husart);
husart->State = HAL_USART_STATE_BUSY;
/* Save actual USART configuration */
tmpcr1 = READ_REG(husart->Instance->CR1);
/* Disable USART */
__HAL_USART_DISABLE(husart);
/* Enable FIFO mode */
SET_BIT(tmpcr1, USART_CR1_FIFOEN);
husart->FifoMode = USART_FIFOMODE_ENABLE;
/* Restore USART configuration */
WRITE_REG(husart->Instance->CR1, tmpcr1);
/* Determine the number of data to process during RX/TX ISR execution */
USARTEx_SetNbDataToProcess(husart);
husart->State = HAL_USART_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(husart);
return HAL_OK;
}
/**
* @brief Configure the Slave Select input pin (NSS).
* @note Software NSS management: SPI slave will always be selected and NSS
* input pin will be ignored.
* @note Hardware NSS management: the SPI slave selection depends on NSS
* input pin. The slave is selected when NSS is low and deselected when
* NSS is high.
* @param husart USART handle.
* @param NSSConfig NSS configuration.
* This parameter can be one of the following values:
* @arg @ref USART_NSS_HARD
* @arg @ref USART_NSS_SOFT
* @retval HAL status
*/
HAL_StatusTypeDef HAL_USARTEx_ConfigNSS(USART_HandleTypeDef *husart, uint32_t NSSConfig)
{
uint32_t tmpcr1 = 0;
/* Check parameters */
assert_param(IS_UART_SPI_SLAVE_INSTANCE(husart->Instance));
assert_param(IS_USART_NSS(NSSConfig));
/* Process Locked */
__HAL_LOCK(husart);
husart->State = HAL_USART_STATE_BUSY;
/* Save actual USART configuration */
tmpcr1 = READ_REG(husart->Instance->CR1);
/* Disable USART */
__HAL_USART_DISABLE(husart);
/* Program DIS_NSS bit in the USART_CR2 register */
MODIFY_REG(husart->Instance->CR2, USART_CR2_DIS_NSS, NSSConfig);
/* Restore USART configuration */
WRITE_REG(husart->Instance->CR1, tmpcr1);
husart->State = HAL_USART_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(husart);
return HAL_OK;
}
/**
* @brief Disable the SPI slave mode.
* @param husart USART handle.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_USARTEx_DisableSlaveMode(USART_HandleTypeDef *husart)
{
uint32_t tmpcr1;
/* Check parameters */
assert_param(IS_UART_SPI_SLAVE_INSTANCE(husart->Instance));
/* Process Locked */
__HAL_LOCK(husart);
husart->State = HAL_USART_STATE_BUSY;
/* Save actual USART configuration */
tmpcr1 = READ_REG(husart->Instance->CR1);
/* Disable USART */
__HAL_USART_DISABLE(husart);
/* Disable SPI slave mode */
CLEAR_BIT(husart->Instance->CR2, USART_CR2_SLVEN);
/* Restore USART configuration */
WRITE_REG(husart->Instance->CR1, tmpcr1);
husart->SlaveMode = USART_SLAVEMODE_ENABLE;
husart->State = HAL_USART_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(husart);
return HAL_OK;
}
/**
* @brief Enable the SPI slave mode.
* @note When the USART operates in SPI slave mode, it handles data flow using
* the serial interface clock derived from the external SCLK signal
* provided by the external master SPI device.
* @note In SPI slave mode, the USART must be enabled before starting the master
* communications (or between frames while the clock is stable). Otherwise,
* if the USART slave is enabled while the master is in the middle of a
* frame, it will become desynchronized with the master.
* @note The data register of the slave needs to be ready before the first edge
* of the communication clock or before the end of the ongoing communication,
* otherwise the SPI slave will transmit zeros.
* @param husart USART handle.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_USARTEx_EnableSlaveMode(USART_HandleTypeDef *husart)
{
uint32_t tmpcr1 = 0;
/* Check parameters */
assert_param(IS_UART_SPI_SLAVE_INSTANCE(husart->Instance));
/* Process Locked */
__HAL_LOCK(husart);
husart->State = HAL_USART_STATE_BUSY;
/* Save actual USART configuration */
tmpcr1 = READ_REG(husart->Instance->CR1);
/* Disable USART */
__HAL_USART_DISABLE(husart);
/* In SPI slave mode mode, the following bits must be kept cleared:
- LINEN and CLKEN bit in the USART_CR2 register
- HDSEL, SCEN and IREN bits in the USART_CR3 register.*/
CLEAR_BIT(husart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
CLEAR_BIT(husart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
/* Enable SPI slave mode */
SET_BIT(husart->Instance->CR2, USART_CR2_SLVEN);
/* Restore USART configuration */
WRITE_REG(husart->Instance->CR1, tmpcr1);
husart->SlaveMode = USART_SLAVEMODE_ENABLE;
husart->State = HAL_USART_STATE_READY;
/* Enable USART */
__HAL_USART_ENABLE(husart);
/* Process Unlocked */
__HAL_UNLOCK(husart);
return HAL_OK;
}
