Extended Peripheral Control functions. More...

Functions
HAL_StatusTypeDef	HAL_UARTEx_EnableClockStopMode (UART_HandleTypeDef *huart)
	Keep UART Clock enabled when in Stop Mode.
HAL_StatusTypeDef	HAL_UARTEx_DisableClockStopMode (UART_HandleTypeDef *huart)
	Disable UART Clock when in Stop Mode.
HAL_StatusTypeDef	HAL_MultiProcessorEx_AddressLength_Set (UART_HandleTypeDef *huart, uint32_t AddressLength)
	By default in multiprocessor mode, when the wake up method is set to address mark, the UART handles only 4-bit long addresses detection; this API allows to enable longer addresses detection (6-, 7- or 8-bit long).
HAL_StatusTypeDef	HAL_UARTEx_StopModeWakeUpSourceConfig (UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection)
	Set Wakeup from Stop mode interrupt flag selection.
HAL_StatusTypeDef	HAL_UARTEx_EnableStopMode (UART_HandleTypeDef *huart)
	Enable UART Stop Mode.
HAL_StatusTypeDef	HAL_UARTEx_DisableStopMode (UART_HandleTypeDef *huart)
	Disable UART Stop Mode.
HAL_StatusTypeDef	HAL_UARTEx_ReceiveToIdle (UART_HandleTypeDef huart, uint8_t pData, uint16_t Size, uint16_t *RxLen, uint32_t Timeout)
	Receive an amount of data in blocking mode till either the expected number of data is received or an IDLE event occurs.
HAL_StatusTypeDef	HAL_UARTEx_ReceiveToIdle_IT (UART_HandleTypeDef huart, uint8_t pData, uint16_t Size)
	Receive an amount of data in interrupt mode till either the expected number of data is received or an IDLE event occurs.
HAL_StatusTypeDef	HAL_UARTEx_ReceiveToIdle_DMA (UART_HandleTypeDef huart, uint8_t pData, uint16_t Size)
	Receive an amount of data in DMA mode till either the expected number of data is received or an IDLE event occurs.

Detailed Description

Extended Peripheral Control functions.

 ===============================================================================
                      ##### Peripheral Control functions #####
 ===============================================================================
    [..] This section provides the following functions:
     (+) HAL_UARTEx_EnableClockStopMode() API enables the UART clock (HSI or LSE only) during stop mode
     (+) HAL_UARTEx_DisableClockStopMode() API disables the above functionality
     (+) HAL_MultiProcessorEx_AddressLength_Set() API optionally sets the UART node address
         detection length to more than 4 bits for multiprocessor address mark wake up.
     (+) HAL_UARTEx_StopModeWakeUpSourceConfig() API defines the wake-up from stop mode
         trigger: address match, Start Bit detection or RXNE bit status.
     (+) HAL_UARTEx_EnableStopMode() API enables the UART to wake up the MCU from stop mode
     (+) HAL_UARTEx_DisableStopMode() API disables the above functionality
     (+) HAL_UARTEx_EnableFifoMode() API enables the FIFO mode
     (+) HAL_UARTEx_DisableFifoMode() API disables the FIFO mode
     (+) HAL_UARTEx_SetTxFifoThreshold() API sets the TX FIFO threshold
     (+) HAL_UARTEx_SetRxFifoThreshold() API sets the RX FIFO threshold

    [..] This subsection also provides a set of additional functions providing enhanced reception
    services to user. (For example, these functions allow application to handle use cases
    where number of data to be received is unknown).

    (#) Compared to standard reception services which only consider number of received
        data elements as reception completion criteria, these functions also consider additional events
        as triggers for updating reception status to caller :
       (+) Detection of inactivity period (RX line has not been active for a given period).
          (++) RX inactivity detected by IDLE event, i.e. RX line has been in idle state (normally high state)
               for 1 frame time, after last received byte.
          (++) RX inactivity detected by RTO, i.e. line has been in idle state
               for a programmable time, after last received byte.
       (+) Detection that a specific character has been received.

    (#) There are two mode of transfer:
       (+) Blocking mode: The reception is performed in polling mode, until either expected number of data is received,
           or till IDLE event occurs. Reception is handled only during function execution.
           When function exits, no data reception could occur. HAL status and number of actually received data elements,
           are returned by function after finishing transfer.
       (+) Non-Blocking mode: The reception is performed using Interrupts or DMA.
           These API's return the HAL status.
           The end of the data processing will be indicated through the
           dedicated UART IRQ when using Interrupt mode or the DMA IRQ when using DMA mode.
           The HAL_UARTEx_RxEventCallback() user callback will be executed during Receive process
           The HAL_UART_ErrorCallback()user callback will be executed when a reception error is detected.

    (#) Blocking mode API:
        (+) HAL_UARTEx_ReceiveToIdle()

    (#) Non-Blocking mode API with Interrupt:
        (+) HAL_UARTEx_ReceiveToIdle_IT()

    (#) Non-Blocking mode API with DMA:
        (+) HAL_UARTEx_ReceiveToIdle_DMA()

Function Documentation

HAL_StatusTypeDef HAL_MultiProcessorEx_AddressLength_Set	(	UART_HandleTypeDef *	huart,
		uint32_t	AddressLength
	)

By default in multiprocessor mode, when the wake up method is set to address mark, the UART handles only 4-bit long addresses detection; this API allows to enable longer addresses detection (6-, 7- or 8-bit long).

Note:: Addresses detection lengths are: 6-bit address detection in 7-bit data mode, 7-bit address detection in 8-bit data mode, 8-bit address detection in 9-bit data mode.

Parameters:

huart	UART handle.
AddressLength	This parameter can be one of the following values: UART_ADDRESS_DETECT_4B 4-bit long address UART_ADDRESS_DETECT_7B 6-, 7- or 8-bit long address

Return values:

HAL status

Definition at line 439 of file stm32l4xx_hal_uart_ex.c.

References __HAL_UART_DISABLE, __HAL_UART_ENABLE, assert_param, __UART_HandleTypeDef::gState, HAL_UART_STATE_BUSY, __UART_HandleTypeDef::Instance, IS_UART_ADDRESSLENGTH_DETECT, and UART_CheckIdleState().

HAL_StatusTypeDef HAL_UARTEx_DisableClockStopMode ( UART_HandleTypeDef * huart )

Disable UART Clock when in Stop Mode.

Parameters:

huart UART handle.

Return values:

HAL status

Definition at line 411 of file stm32l4xx_hal_uart_ex.c.

References __UART_HandleTypeDef::Instance.

HAL_StatusTypeDef HAL_UARTEx_DisableStopMode ( UART_HandleTypeDef * huart )

Disable UART Stop Mode.

Parameters:

huart UART handle.

Return values:

HAL status

Definition at line 551 of file stm32l4xx_hal_uart_ex.c.

References __UART_HandleTypeDef::Instance.

HAL_StatusTypeDef HAL_UARTEx_EnableClockStopMode ( UART_HandleTypeDef * huart )

Keep UART Clock enabled when in Stop Mode.

Note:: When the USART clock source is configured to be LSE or HSI, it is possible to keep enabled this clock during STOP mode by setting the UCESM bit in USART_CR3 control register.; When LPUART is used to wakeup from stop with LSE is selected as LPUART clock source, and desired baud rate is 9600 baud, the bit UCESM bit in LPUART_CR3 control register must be set.

Parameters:

huart UART handle.

Return values:

HAL status

Definition at line 392 of file stm32l4xx_hal_uart_ex.c.

References __UART_HandleTypeDef::Instance.

HAL_StatusTypeDef HAL_UARTEx_EnableStopMode ( UART_HandleTypeDef * huart )

Enable UART Stop Mode.

Note:: The UART is able to wake up the MCU from Stop 1 mode as long as UART clock is HSI or LSE.

Parameters:

huart UART handle.

Return values:

HAL status

Definition at line 532 of file stm32l4xx_hal_uart_ex.c.

References __UART_HandleTypeDef::Instance.

HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle	(	UART_HandleTypeDef *	huart,
		uint8_t *	pData,
		uint16_t	Size,
		uint16_t *	RxLen,
		uint32_t	Timeout
	)

Receive an amount of data in blocking mode till either the expected number of data is received or an IDLE event occurs.

Note:: HAL_OK is returned if reception is completed (expected number of data has been received) or if reception is stopped after IDLE event (less than the expected number of data has been received) In this case, RxLen output parameter indicates number of data available in reception buffer.; When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), the received data is handled as a set of uint16_t. In this case, Size must indicate the number of uint16_t available through pData.; When FIFO mode is enabled, the RXFNE flag is set as long as the RXFIFO is not empty. Read operations from the RDR register are performed when RXFNE flag is set. From hardware perspective, RXFNE flag and RXNE are mapped on the same bit-field.

Parameters:

huart	UART handle.
pData	Pointer to data buffer (uint8_t or uint16_t data elements).
Size	Amount of data elements (uint8_t or uint16_t) to be received.
RxLen	Number of data elements finally received (could be lower than Size, in case reception ends on IDLE event)
Timeout	Timeout duration expressed in ms (covers the whole reception sequence).

Return values:

HAL status

Definition at line 765 of file stm32l4xx_hal_uart_ex.c.

HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle_DMA	(	UART_HandleTypeDef *	huart,
		uint8_t *	pData,
		uint16_t	Size
	)

Receive an amount of data in DMA mode till either the expected number of data is received or an IDLE event occurs.

Note:: Reception is initiated by this function call. Further progress of reception is achieved thanks to DMA services, transferring automatically received data elements in user reception buffer and calling registered callbacks at half/end of reception. UART IDLE events are also used to consider reception phase as ended. In all cases, callback execution will indicate number of received data elements.; When the UART parity is enabled (PCE = 1), the received data contain the parity bit (MSB position).; When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), the received data is handled as a set of uint16_t. In this case, Size must indicate the number of uint16_t available through pData.

Parameters:

huart	UART handle.
pData	Pointer to data buffer (uint8_t or uint16_t data elements).
Size	Amount of data elements (uint8_t or uint16_t) to be received.

Return values:

HAL status

Definition at line 952 of file stm32l4xx_hal_uart_ex.c.

References __HAL_UART_CLEAR_FLAG, HAL_UART_RECEPTION_TOIDLE, HAL_UART_STATE_READY, __UART_HandleTypeDef::Instance, __UART_HandleTypeDef::ReceptionType, __UART_HandleTypeDef::RxState, UART_CLEAR_IDLEF, and UART_Start_Receive_DMA().

HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle_IT	(	UART_HandleTypeDef *	huart,
		uint8_t *	pData,
		uint16_t	Size
	)

Receive an amount of data in interrupt mode till either the expected number of data is received or an IDLE event occurs.

Note:: Reception is initiated by this function call. Further progress of reception is achieved thanks to UART interrupts raised by RXNE and IDLE events. Callback is called at end of reception indicating number of received data elements.; When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01), the received data is handled as a set of uint16_t. In this case, Size must indicate the number of uint16_t available through pData.

Parameters:

huart	UART handle.
pData	Pointer to data buffer (uint8_t or uint16_t data elements).
Size	Amount of data elements (uint8_t or uint16_t) to be received.

Return values:

HAL status

Definition at line 890 of file stm32l4xx_hal_uart_ex.c.

References __HAL_UART_CLEAR_FLAG, HAL_UART_RECEPTION_TOIDLE, HAL_UART_STATE_READY, __UART_HandleTypeDef::Instance, __UART_HandleTypeDef::ReceptionType, __UART_HandleTypeDef::RxState, UART_CLEAR_IDLEF, and UART_Start_Receive_IT().

HAL_StatusTypeDef HAL_UARTEx_StopModeWakeUpSourceConfig	(	UART_HandleTypeDef *	huart,
		UART_WakeUpTypeDef	WakeUpSelection
	)

Set Wakeup from Stop mode interrupt flag selection.

Note:: It is the application responsibility to enable the interrupt used as usart_wkup interrupt source before entering low-power mode.

Parameters:

huart	UART handle.
WakeUpSelection	Address match, Start Bit detection or RXNE/RXFNE bit status. This parameter can be one of the following values: UART_WAKEUP_ON_ADDRESS UART_WAKEUP_ON_STARTBIT UART_WAKEUP_ON_READDATA_NONEMPTY

Return values:

HAL status

Definition at line 477 of file stm32l4xx_hal_uart_ex.c.

References __HAL_UART_DISABLE, __HAL_UART_ENABLE, assert_param, __UART_HandleTypeDef::gState, HAL_GetTick(), HAL_UART_STATE_BUSY, HAL_UART_STATE_READY, HAL_UART_TIMEOUT_VALUE, __UART_HandleTypeDef::Instance, IS_UART_WAKEUP_SELECTION, UART_WaitOnFlagUntilTimeout(), UART_WAKEUP_ON_ADDRESS, UARTEx_Wakeup_AddressConfig(), and UART_WakeUpTypeDef::WakeUpEvent.

Functions

Detailed Description

Function Documentation