UARTEx Private Functions

Functions
static void	UARTEx_Wakeup_AddressConfig (UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection)
	Initialize the UART wake-up from stop mode parameters when triggered by address detection. More...
static void	UARTEx_SetNbDataToProcess (UART_HandleTypeDef *huart)
	Calculate the number of data to process in RX/TX ISR. More...

Detailed Description

Function Documentation

UARTEx_SetNbDataToProcess()

static void UARTEx_SetNbDataToProcess ( UART_HandleTypeDef *  huart )

static

Calculate the number of data to process in RX/TX ISR.

Note

The RX FIFO depth and the TX FIFO depth is extracted from the UART configuration registers.

Parameters

huart

UART handle.

Return values

None

Definition at line 748 of file stm32l4xx_hal_uart_ex.c.

{
  uint8_t rx_fifo_depth;
  uint8_t tx_fifo_depth;
  uint8_t rx_fifo_threshold;
  uint8_t tx_fifo_threshold;
  uint8_t numerator[] = {1U, 1U, 1U, 3U, 7U, 1U, 0U, 0U};
  uint8_t denominator[] = {8U, 4U, 2U, 4U, 8U, 1U, 1U, 1U};

  if (huart->FifoMode == UART_FIFOMODE_DISABLE)
  {
    huart->NbTxDataToProcess = 1U;
    huart->NbRxDataToProcess = 1U;
  }
  else
  {
    rx_fifo_depth = RX_FIFO_DEPTH;
    tx_fifo_depth = TX_FIFO_DEPTH;
    rx_fifo_threshold = (uint8_t)(READ_BIT(huart->Instance->CR3, USART_CR3_RXFTCFG) >> USART_CR3_RXFTCFG_Pos);
    tx_fifo_threshold = (uint8_t)(READ_BIT(huart->Instance->CR3, USART_CR3_TXFTCFG) >> USART_CR3_TXFTCFG_Pos);
    huart->NbTxDataToProcess = ((uint16_t)tx_fifo_depth * numerator[tx_fifo_threshold]) / (uint16_t)denominator[tx_fifo_threshold];
    huart->NbRxDataToProcess = ((uint16_t)rx_fifo_depth * numerator[rx_fifo_threshold]) / (uint16_t)denominator[rx_fifo_threshold];
  }
}

UARTEx_Wakeup_AddressConfig()

static void UARTEx_Wakeup_AddressConfig ( UART_HandleTypeDef *  huart, UART_WakeUpTypeDef  WakeUpSelection  )

static

Initialize the UART wake-up from stop mode parameters when triggered by address detection.

Parameters

huart	UART handle.
WakeUpSelection	UART wake up from stop mode parameters.

Return values

None

Definition at line 729 of file stm32l4xx_hal_uart_ex.c.

{
  assert_param(IS_UART_ADDRESSLENGTH_DETECT(WakeUpSelection.AddressLength));

  /* Set the USART address length */
  MODIFY_REG(huart->Instance->CR2, USART_CR2_ADDM7, WakeUpSelection.AddressLength);

  /* Set the USART address node */
  MODIFY_REG(huart->Instance->CR2, USART_CR2_ADD, ((uint32_t)WakeUpSelection.Address << UART_CR2_ADDRESS_LSB_POS));
}