/**
* @brief Initialize the UART wake-up from stop mode parameters when triggered by address detection.
* @param huart UART handle.
* @param WakeUpSelection UART wake up from stop mode parameters.
* @retval None
*/
static void UARTEx_Wakeup_AddressConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection)
{
/* Check parmeters */
assert_param(IS_UART_WAKEUP_FROMSTOP_INSTANCE(huart->Instance));
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));
}
/**
* @brief Set Wakeup from Stop mode interrupt flag selection.
* @param huart: UART handle.
* @param WakeUpSelection: address match, Start Bit detection or RXNE bit status.
* This parameter can be one of the following values:
* @arg @ref UART_WAKEUP_ON_ADDRESS
* @arg @ref UART_WAKEUP_ON_STARTBIT
* @arg @ref UART_WAKEUP_ON_READDATA_NONEMPTY
* @retval HAL status
*/
HAL_StatusTypeDef HAL_UARTEx_StopModeWakeUpSourceConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection)
{
HAL_StatusTypeDef status = HAL_OK;
uint32_t tickstart = 0;
/* check the wake-up from stop mode UART instance */
assert_param(IS_UART_WAKEUP_FROMSTOP_INSTANCE(huart->Instance));
/* check the wake-up selection parameter */
assert_param(IS_UART_WAKEUP_SELECTION(WakeUpSelection.WakeUpEvent));
/* Process Locked */
__HAL_LOCK(huart);
huart->gState = HAL_UART_STATE_BUSY;
/* Disable the Peripheral */
__HAL_UART_DISABLE(huart);
/* Set the wake-up selection scheme */
MODIFY_REG(huart->Instance->CR3, USART_CR3_WUS, WakeUpSelection.WakeUpEvent);
if (WakeUpSelection.WakeUpEvent == UART_WAKEUP_ON_ADDRESS)
{
UARTEx_Wakeup_AddressConfig(huart, WakeUpSelection);
}
/* Enable the Peripheral */
__HAL_UART_ENABLE(huart);
/* Init tickstart for timeout managment*/
tickstart = HAL_GetTick();
/* Wait until REACK flag is set */
if(UART_WaitOnFlagUntilTimeout(huart, USART_ISR_REACK, RESET, tickstart, HAL_UART_TIMEOUT_VALUE) != HAL_OK)
{
status = HAL_TIMEOUT;
}
else
{
/* Initialize the UART State */
huart->gState = HAL_UART_STATE_READY;
}
/* Process Unlocked */
__HAL_UNLOCK(huart);
return status;
}
/**
* @brief Set Wakeup from Stop mode interrupt flag selection
* @param huart: uart handle,
* @param WakeUpSelection: address match, Start Bit detection or RXNE bit status.
* This parameter can be one of the following values:
* @arg UART_WAKEUP_ON_ADDRESS
* @arg UART_WAKEUP_ON_STARTBIT
* @arg UART_WAKEUP_ON_READDATA_NONEMPTY
* @retval HAL status
*/
HAL_StatusTypeDef HAL_UARTEx_StopModeWakeUpSourceConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection)
{
/* check the wake-up from stop mode UART instance */
assert_param(IS_UART_WAKEUP_FROMSTOP_INSTANCE(huart->Instance));
/* Check the wake-up selection parameter */
assert_param(IS_UART_WAKEUP_SELECTION(WakeUpSelection.WakeUpEvent));
/* Process Locked */
__HAL_LOCK(huart);
huart->State = HAL_UART_STATE_BUSY;
/* Disable the Peripheral */
__HAL_UART_DISABLE(huart);
/* Set the wake-up selection scheme */
MODIFY_REG(huart->Instance->CR3, USART_CR3_WUS, WakeUpSelection.WakeUpEvent);
if(WakeUpSelection.WakeUpEvent == UART_WAKEUP_ON_ADDRESS)
{
UART_Wakeup_AddressConfig(huart, WakeUpSelection);
}
/* Enable the Peripheral */
__HAL_UART_ENABLE(huart);
/* Wait until REACK flag is set before moving huart->State to Ready */
if(UART_WaitOnFlagUntilTimeout(huart, USART_ISR_REACK, RESET, UART_REACK_TIMEOUT) != HAL_OK)
{
return HAL_TIMEOUT;
}
/* Process Unlocked */
__HAL_UNLOCK(huart);
/* Initialize the UART state*/
huart->ErrorCode = HAL_UART_ERROR_NONE;
huart->State= HAL_UART_STATE_READY;
return HAL_OK;
}
/**
* @brief Disable UART Stop Mode.
* @param huart UART handle.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_UARTEx_DisableStopMode(UART_HandleTypeDef *huart)
{
/* Check parameter */
assert_param(IS_UART_WAKEUP_FROMSTOP_INSTANCE(huart->Instance));
/* Process Locked */
__HAL_LOCK(huart);
huart->gState = HAL_UART_STATE_BUSY;
/* Clear UESM bit */
CLEAR_BIT(huart->Instance->CR1, USART_CR1_UESM);
huart->gState = HAL_UART_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(huart);
return HAL_OK;
}