Configuration functions
[USART Exported Functions]

Configure Character frame format (Datawidth, Parity control, Stop Bits)

Note:

Call of this function is equivalent to following function call sequence :

• Data Width configuration using LL_USART_SetDataWidth() function
• Parity Control and mode configuration using LL_USART_SetParity() function
• Stop bits configuration using LL_USART_SetStopBitsLength() function CR1 PS LL_USART_ConfigCharacter
  CR1 PCE LL_USART_ConfigCharacter
  CR1 M LL_USART_ConfigCharacter
  CR2 STOP LL_USART_ConfigCharacter

Parameters:

USARTx	USART Instance
DataWidth	This parameter can be one of the following values: LL_USART_DATAWIDTH_7B LL_USART_DATAWIDTH_8B LL_USART_DATAWIDTH_9B
ParityMode	This parameter can be one of the following values: LL_USART_PARITY_NONE LL_USART_PARITY_EVEN LL_USART_PARITY_ODD
StopBits	This parameter can be one of the following values: LL_USART_STOPBITS_1 LL_USART_STOPBITS_2 LL_USART_STOPBITS_1_5

Return values:

None

Definition at line 956 of file stm32l4xx_ll_usart.h.

Configure Clock signal format (Phase Polarity and choice about output of last bit clock pulse)

Note:

Call of this function is equivalent to following function call sequence :

• Clock Phase configuration using LL_USART_SetClockPhase() function
• Clock Polarity configuration using LL_USART_SetClockPolarity() function
• Output of Last bit Clock pulse configuration using LL_USART_SetLastClkPulseOutput() function

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 CPHA LL_USART_ConfigClock
CR2 CPOL LL_USART_ConfigClock
CR2 LBCL LL_USART_ConfigClock

Parameters:

USARTx	USART Instance
Phase	This parameter can be one of the following values: LL_USART_PHASE_1EDGE LL_USART_PHASE_2EDGE
Polarity	This parameter can be one of the following values: LL_USART_POLARITY_LOW LL_USART_POLARITY_HIGH
LBCPOutput	This parameter can be one of the following values: LL_USART_LASTCLKPULSE_NO_OUTPUT LL_USART_LASTCLKPULSE_OUTPUT

Return values:

None

Definition at line 858 of file stm32l4xx_ll_usart.h.

Set Address of the USART node.

Note:

This is used in multiprocessor communication during Mute mode or Stop mode, for wakeup with address mark detection.

4bits address node is used when 4-bit Address Detection is selected in ADDM7. (b7-b4 should be set to 0) 8bits address node is used when 7-bit Address Detection is selected in ADDM7. (This is used in multiprocessor communication during Mute mode or Stop mode, for wakeup with 7-bit address mark detection. The MSB of the character sent by the transmitter should be equal to 1. It may also be used for character detection during normal reception, Mute mode inactive (for example, end of block detection in ModBus protocol). In this case, the whole received character (8-bit) is compared to the ADD[7:0] value and CMF flag is set on match) CR2 ADD LL_USART_ConfigNodeAddress
CR2 ADDM7 LL_USART_ConfigNodeAddress

Parameters:

USARTx	USART Instance
AddressLen	This parameter can be one of the following values: LL_USART_ADDRESS_DETECT_4B LL_USART_ADDRESS_DETECT_7B
NodeAddress	4 or 7 bit Address of the USART node.

Return values:

None

Definition at line 1234 of file stm32l4xx_ll_usart.h.

USART Disable (all USART prescalers and outputs are disabled)

Note:

When USART is disabled, USART prescalers and outputs are stopped immediately, and current operations are discarded. The configuration of the USART is kept, but all the status flags, in the USARTx_ISR are set to their default values. CR1 UE LL_USART_Disable

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 455 of file stm32l4xx_ll_usart.h.

Disable Auto Baud-Rate Detection.

Note:

Macro IS_USART_AUTOBAUDRATE_DETECTION_INSTANCE(USARTx) can be used to check whether or not Auto Baud Rate detection feature is supported by the USARTx instance. CR2 ABREN LL_USART_DisableAutoBaudRate

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1125 of file stm32l4xx_ll_usart.h.

Disable CTS HW Flow Control.

Note:

Macro IS_UART_HWFLOW_INSTANCE(USARTx) can be used to check whether or not Hardware Flow control feature is supported by the USARTx instance. CR3 CTSE LL_USART_DisableCTSHWFlowCtrl

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1315 of file stm32l4xx_ll_usart.h.

Receiver Disable CR1 RE LL_USART_DisableDirectionRx.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 530 of file stm32l4xx_ll_usart.h.

Transmitter Disable CR1 TE LL_USART_DisableDirectionTx.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 552 of file stm32l4xx_ll_usart.h.

USART disabled in STOP Mode.

Note:

When this function is disabled, USART is not able to wake up the MCU from Stop mode

Macro IS_UART_WAKEUP_FROMSTOP_INSTANCE(USARTx) can be used to check whether or not Wake-up from Stop mode feature is supported by the USARTx instance. CR1 UESM LL_USART_DisableInStopMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 495 of file stm32l4xx_ll_usart.h.

Prevent Mute Mode use.

Set Receiver in active mode permanently. CR1 MME LL_USART_DisableMuteMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 698 of file stm32l4xx_ll_usart.h.

Disable One bit sampling method CR3 ONEBIT LL_USART_DisableOneBitSamp.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1374 of file stm32l4xx_ll_usart.h.

Disable Overrun detection CR3 OVRDIS LL_USART_DisableOverrunDetect.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1407 of file stm32l4xx_ll_usart.h.

Disable RTS HW Flow Control.

Note:

Macro IS_UART_HWFLOW_INSTANCE(USARTx) can be used to check whether or not Hardware Flow control feature is supported by the USARTx instance. CR3 RTSE LL_USART_DisableRTSHWFlowCtrl

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1289 of file stm32l4xx_ll_usart.h.

Disable Receiver Timeout CR2 RTOEN LL_USART_DisableRxTimeout.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1195 of file stm32l4xx_ll_usart.h.

Disable Clock output on SCLK pin.

Note:

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 CLKEN LL_USART_DisableSCLKOutput

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 884 of file stm32l4xx_ll_usart.h.

USART Enable CR1 UE LL_USART_Enable.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 441 of file stm32l4xx_ll_usart.h.

Enable Auto Baud-Rate Detection.

Note:

Macro IS_USART_AUTOBAUDRATE_DETECTION_INSTANCE(USARTx) can be used to check whether or not Auto Baud Rate detection feature is supported by the USARTx instance. CR2 ABREN LL_USART_EnableAutoBaudRate

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1112 of file stm32l4xx_ll_usart.h.

Enable CTS HW Flow Control.

Note:

Macro IS_UART_HWFLOW_INSTANCE(USARTx) can be used to check whether or not Hardware Flow control feature is supported by the USARTx instance. CR3 CTSE LL_USART_EnableCTSHWFlowCtrl

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1302 of file stm32l4xx_ll_usart.h.

Receiver Enable (Receiver is enabled and begins searching for a start bit) CR1 RE LL_USART_EnableDirectionRx.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 519 of file stm32l4xx_ll_usart.h.

Transmitter Enable CR1 TE LL_USART_EnableDirectionTx.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 541 of file stm32l4xx_ll_usart.h.

USART enabled in STOP Mode.

Note:

When this function is enabled, USART is able to wake up the MCU from Stop mode, provided that USART clock selection is HSI or LSE in RCC.

Macro IS_UART_WAKEUP_FROMSTOP_INSTANCE(USARTx) can be used to check whether or not Wake-up from Stop mode feature is supported by the USARTx instance. CR1 UESM LL_USART_EnableInStopMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 481 of file stm32l4xx_ll_usart.h.

Allow switch between Mute Mode and Active mode CR1 MME LL_USART_EnableMuteMode.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 687 of file stm32l4xx_ll_usart.h.

Enable One bit sampling method CR3 ONEBIT LL_USART_EnableOneBitSamp.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1363 of file stm32l4xx_ll_usart.h.

Enable Overrun detection CR3 OVRDIS LL_USART_EnableOverrunDetect.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1396 of file stm32l4xx_ll_usart.h.

Enable RTS HW Flow Control.

Note:

Macro IS_UART_HWFLOW_INSTANCE(USARTx) can be used to check whether or not Hardware Flow control feature is supported by the USARTx instance. CR3 RTSE LL_USART_EnableRTSHWFlowCtrl

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1276 of file stm32l4xx_ll_usart.h.

Enable Receiver Timeout CR2 RTOEN LL_USART_EnableRxTimeout.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1184 of file stm32l4xx_ll_usart.h.

Enable Clock output on SCLK pin.

Note:

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 CLKEN LL_USART_EnableSCLKOutput

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 871 of file stm32l4xx_ll_usart.h.

Return Auto Baud-Rate mode.

Note:

Macro IS_USART_AUTOBAUDRATE_DETECTION_INSTANCE(USARTx) can be used to check whether or not Auto Baud Rate detection feature is supported by the USARTx instance. CR2 ABRMODE LL_USART_GetAutoBaudRateMode

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_AUTOBAUD_DETECT_ON_STARTBIT LL_USART_AUTOBAUD_DETECT_ON_FALLINGEDGE LL_USART_AUTOBAUD_DETECT_ON_7F_FRAME LL_USART_AUTOBAUD_DETECT_ON_55_FRAME

Definition at line 1173 of file stm32l4xx_ll_usart.h.

Return current Baudrate value, according to USARTDIV present in BRR register (full BRR content), and to used Peripheral Clock and Oversampling mode values BRR BRR LL_USART_GetBaudRate.

Parameters:

USARTx	USART Instance
PeriphClk	Peripheral Clock
OverSampling	This parameter can be one of the following values: LL_USART_OVERSAMPLING_16 LL_USART_OVERSAMPLING_8

Return values:

Baudrate

Definition at line 1499 of file stm32l4xx_ll_usart.h.

Retrieve Binary data configuration CR2 DATAINV LL_USART_GetBinaryDataLogic.

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_BINARY_LOGIC_POSITIVE LL_USART_BINARY_LOGIC_NEGATIVE

Definition at line 1068 of file stm32l4xx_ll_usart.h.

Get Block Length value in reception RTOR BLEN LL_USART_GetBlockLength.

Parameters:

USARTx

USART Instance

Return values:

0..0xFF

Definition at line 1558 of file stm32l4xx_ll_usart.h.

Return phase of the clock output on the SCLK pin in synchronous mode.

Note:

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 CPHA LL_USART_GetClockPhase

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_PHASE_1EDGE LL_USART_PHASE_2EDGE

Definition at line 799 of file stm32l4xx_ll_usart.h.

Return polarity of the clock output on the SCLK pin in synchronous mode.

Note:

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 CPOL LL_USART_GetClockPolarity

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_POLARITY_LOW LL_USART_POLARITY_HIGH

Definition at line 830 of file stm32l4xx_ll_usart.h.

Return Word length (i.e.

nb of data bits, excluding start and stop bits) CR1 M LL_USART_GetDataWidth

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_DATAWIDTH_7B LL_USART_DATAWIDTH_8B LL_USART_DATAWIDTH_9B

Definition at line 676 of file stm32l4xx_ll_usart.h.

Return HW Flow Control configuration (both CTS and RTS)

Note:

Macro IS_UART_HWFLOW_INSTANCE(USARTx) can be used to check whether or not Hardware Flow control feature is supported by the USARTx instance. CR3 RTSE LL_USART_GetHWFlowCtrl
CR3 CTSE LL_USART_GetHWFlowCtrl

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_HWCONTROL_NONE LL_USART_HWCONTROL_RTS LL_USART_HWCONTROL_CTS LL_USART_HWCONTROL_RTS_CTS

Definition at line 1352 of file stm32l4xx_ll_usart.h.

Retrieve Clock pulse of the last data bit output configuration (Last bit Clock pulse output to the SCLK pin or not)

Note:

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 LBCL LL_USART_GetLastClkPulseOutput

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_LASTCLKPULSE_NO_OUTPUT LL_USART_LASTCLKPULSE_OUTPUT

Definition at line 768 of file stm32l4xx_ll_usart.h.

Return 8 bit Address of the USART node as set in ADD field of CR2.

Note:

If 4-bit Address Detection is selected in ADDM7, only 4bits (b3-b0) of returned value are relevant (b31-b4 are not relevant) If 7-bit Address Detection is selected in ADDM7, only 8bits (b7-b0) of returned value are relevant (b31-b8 are not relevant) CR2 ADD LL_USART_GetNodeAddress

Parameters:

USARTx

USART Instance

Return values:

Address

of the USART node (0..255)

Definition at line 1250 of file stm32l4xx_ll_usart.h.

Return Length of Node Address used in Address Detection mode (7-bit or 4-bit) CR2 ADDM7 LL_USART_GetNodeAddressLen.

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_ADDRESS_DETECT_4B LL_USART_ADDRESS_DETECT_7B

Definition at line 1263 of file stm32l4xx_ll_usart.h.

Return Oversampling mode CR1 OVER8 LL_USART_GetOverSampling.

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_OVERSAMPLING_16 LL_USART_OVERSAMPLING_8

Definition at line 736 of file stm32l4xx_ll_usart.h.

Return Parity configuration (enabled/disabled and parity mode if enabled) CR1 PS LL_USART_GetParity
CR1 PCE LL_USART_GetParity.

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_PARITY_NONE LL_USART_PARITY_EVEN LL_USART_PARITY_ODD

Definition at line 620 of file stm32l4xx_ll_usart.h.

Retrieve RX pin active level logic configuration CR2 RXINV LL_USART_GetRXPinLevel.

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_RXPIN_LEVEL_STANDARD LL_USART_RXPIN_LEVEL_INVERTED

Definition at line 1012 of file stm32l4xx_ll_usart.h.

Get Receiver Time Out Value (expressed in nb of bits duration) RTOR RTO LL_USART_GetRxTimeout.

Parameters:

USARTx

USART Instance

Return values:

0..0x00FFFFFF

Definition at line 1535 of file stm32l4xx_ll_usart.h.

Retrieve the length of the stop bits CR2 STOP LL_USART_GetStopBitsLength.

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_STOPBITS_1 LL_USART_STOPBITS_1_5 LL_USART_STOPBITS_2

Definition at line 926 of file stm32l4xx_ll_usart.h.

Return transfer bit order (either Less or Most Significant Bit First)

Note:

MSB First means data is transmitted/received with the MSB first, following the start bit. LSB First means data is transmitted/received with data bit 0 first, following the start bit. CR2 MSBFIRST LL_USART_GetTransferBitOrder

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_BITORDER_LSBFIRST LL_USART_BITORDER_MSBFIRST

Definition at line 1099 of file stm32l4xx_ll_usart.h.

Return enabled/disabled states of Transmitter and Receiver CR1 RE LL_USART_GetTransferDirection
CR1 TE LL_USART_GetTransferDirection.

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_DIRECTION_NONE LL_USART_DIRECTION_RX LL_USART_DIRECTION_TX LL_USART_DIRECTION_TX_RX

Definition at line 586 of file stm32l4xx_ll_usart.h.

Retrieve TX pin active level logic configuration CR2 TXINV LL_USART_GetTXPinLevel.

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_TXPIN_LEVEL_STANDARD LL_USART_TXPIN_LEVEL_INVERTED

Definition at line 1039 of file stm32l4xx_ll_usart.h.

Retrieve TX/RX pins swapping configuration.

CR2 SWAP LL_USART_GetTXRXSwap

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_TXRX_STANDARD LL_USART_TXRX_SWAPPED

Definition at line 985 of file stm32l4xx_ll_usart.h.

Return Receiver Wakeup method from Mute mode CR1 WAKE LL_USART_GetWakeUpMethod.

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_WAKEUP_IDLELINE LL_USART_WAKEUP_ADDRESSMARK

Definition at line 647 of file stm32l4xx_ll_usart.h.

Return event type for Wake UP Interrupt Flag (WUS[1:0] bits)

Note:

Macro IS_UART_WAKEUP_FROMSTOP_INSTANCE(USARTx) can be used to check whether or not Wake-up from Stop mode feature is supported by the USARTx instance. CR3 WUS LL_USART_GetWKUPType

Parameters:

USARTx

USART Instance

Return values:

Returned

value can be one of the following values: LL_USART_WAKEUP_ON_ADDRESS LL_USART_WAKEUP_ON_STARTBIT LL_USART_WAKEUP_ON_RXNE

Definition at line 1451 of file stm32l4xx_ll_usart.h.

Indicate if USART is enabled CR1 UE LL_USART_IsEnabled.

Parameters:

USARTx

USART Instance

Return values:

State

of bit (1 or 0).

Definition at line 466 of file stm32l4xx_ll_usart.h.

Indicate if Auto Baud-Rate Detection mechanism is enabled.

Note:

Macro IS_USART_AUTOBAUDRATE_DETECTION_INSTANCE(USARTx) can be used to check whether or not Auto Baud Rate detection feature is supported by the USARTx instance. CR2 ABREN LL_USART_IsEnabledAutoBaud

Parameters:

USARTx

USART Instance

Return values:

State

of bit (1 or 0).

Definition at line 1138 of file stm32l4xx_ll_usart.h.

Indicate if USART is enabled in STOP Mode (able to wake up MCU from Stop mode or not)

Note:

Macro IS_UART_WAKEUP_FROMSTOP_INSTANCE(USARTx) can be used to check whether or not Wake-up from Stop mode feature is supported by the USARTx instance. CR1 UESM LL_USART_IsEnabledInStopMode

Parameters:

USARTx

USART Instance

Return values:

State

of bit (1 or 0).

Definition at line 508 of file stm32l4xx_ll_usart.h.

Indicate if switch between Mute Mode and Active mode is allowed CR1 MME LL_USART_IsEnabledMuteMode.

Parameters:

USARTx

USART Instance

Return values:

State

of bit (1 or 0).

Definition at line 709 of file stm32l4xx_ll_usart.h.

Indicate if One bit sampling method is enabled CR3 ONEBIT LL_USART_IsEnabledOneBitSamp.

Parameters:

USARTx

USART Instance

Return values:

State

of bit (1 or 0).

Definition at line 1385 of file stm32l4xx_ll_usart.h.

Indicate if Overrun detection is enabled CR3 OVRDIS LL_USART_IsEnabledOverrunDetect.

Parameters:

USARTx

USART Instance

Return values:

State

of bit (1 or 0).

Definition at line 1418 of file stm32l4xx_ll_usart.h.

Indicate if Receiver Timeout feature is enabled CR2 RTOEN LL_USART_IsEnabledRxTimeout.

Parameters:

USARTx

USART Instance

Return values:

State

of bit (1 or 0).

Definition at line 1206 of file stm32l4xx_ll_usart.h.

Indicate if Clock output on SCLK pin is enabled.

Note:

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 CLKEN LL_USART_IsEnabledSCLKOutput

Parameters:

USARTx

USART Instance

Return values:

State

of bit (1 or 0).

Definition at line 897 of file stm32l4xx_ll_usart.h.

Set Auto Baud-Rate mode bits.

Note:

Macro IS_USART_AUTOBAUDRATE_DETECTION_INSTANCE(USARTx) can be used to check whether or not Auto Baud Rate detection feature is supported by the USARTx instance. CR2 ABRMODE LL_USART_SetAutoBaudRateMode

Parameters:

USARTx	USART Instance
AutoBaudRateMode	This parameter can be one of the following values: LL_USART_AUTOBAUD_DETECT_ON_STARTBIT LL_USART_AUTOBAUD_DETECT_ON_FALLINGEDGE LL_USART_AUTOBAUD_DETECT_ON_7F_FRAME LL_USART_AUTOBAUD_DETECT_ON_55_FRAME

Return values:

None

Definition at line 1156 of file stm32l4xx_ll_usart.h.

Configure USART BRR register for achieving expected Baudrate value.

Note:

Compute and set USARTDIV value in BRR Register (full BRR content) according to used Peripheral Clock, Oversampling mode, and expected BaudRate values BRR BRR LL_USART_SetBaudRate

Parameters:

USARTx	USART Instance
PeriphClk	Peripheral Clock
OverSampling	This parameter can be one of the following values: LL_USART_OVERSAMPLING_16 LL_USART_OVERSAMPLING_8
BaudRate	Baudrate

Return values:

None

Definition at line 1469 of file stm32l4xx_ll_usart.h.

Configure Binary data logic.

Note:

Allow to define how Logical data from the data register are send/received : either in positive/direct logic (1=H, 0=L) or in negative/inverse logic (1=L, 0=H) CR2 DATAINV LL_USART_SetBinaryDataLogic

Parameters:

USARTx	USART Instance
DataLogic	This parameter can be one of the following values: LL_USART_BINARY_LOGIC_POSITIVE LL_USART_BINARY_LOGIC_NEGATIVE

Return values:

None

Definition at line 1055 of file stm32l4xx_ll_usart.h.

Set Block Length value in reception RTOR BLEN LL_USART_SetBlockLength.

Parameters:

USARTx	USART Instance
BlockLength	0..0xFF

Return values:

None

Definition at line 1547 of file stm32l4xx_ll_usart.h.

Select the phase of the clock output on the SCLK pin in synchronous mode.

Note:

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 CPHA LL_USART_SetClockPhase

Parameters:

USARTx	USART Instance
Phase	This parameter can be one of the following values: LL_USART_PHASE_1EDGE LL_USART_PHASE_2EDGE

Return values:

None

Definition at line 784 of file stm32l4xx_ll_usart.h.

Select the polarity of the clock output on the SCLK pin in synchronous mode.

Note:

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 CPOL LL_USART_SetClockPolarity

Parameters:

USARTx	USART Instance
Polarity	This parameter can be one of the following values: LL_USART_POLARITY_LOW LL_USART_POLARITY_HIGH

Return values:

None

Definition at line 815 of file stm32l4xx_ll_usart.h.

Set Word length (i.e.

nb of data bits, excluding start and stop bits) CR1 M LL_USART_SetDataWidth

Parameters:

USARTx	USART Instance
DataWidth	This parameter can be one of the following values: LL_USART_DATAWIDTH_7B LL_USART_DATAWIDTH_8B LL_USART_DATAWIDTH_9B

Return values:

None

Definition at line 662 of file stm32l4xx_ll_usart.h.

Configure HW Flow Control mode (both CTS and RTS)

Note:

Macro IS_UART_HWFLOW_INSTANCE(USARTx) can be used to check whether or not Hardware Flow control feature is supported by the USARTx instance. CR3 RTSE LL_USART_SetHWFlowCtrl
CR3 CTSE LL_USART_SetHWFlowCtrl

Parameters:

USARTx	USART Instance
HWFlowCtrlMode	This parameter can be one of the following values: LL_USART_HWCONTROL_NONE LL_USART_HWCONTROL_RTS LL_USART_HWCONTROL_CTS LL_USART_HWCONTROL_RTS_CTS

Return values:

None

Definition at line 1334 of file stm32l4xx_ll_usart.h.

Configure if Clock pulse of the last data bit is output to the SCLK pin or not.

Note:

Macro IS_USART_INSTANCE(USARTx) can be used to check whether or not Synchronous mode is supported by the USARTx instance. CR2 LBCL LL_USART_SetLastClkPulseOutput

Parameters:

USARTx	USART Instance
LBCPOutput	This parameter can be one of the following values: LL_USART_LASTCLKPULSE_NO_OUTPUT LL_USART_LASTCLKPULSE_OUTPUT

Return values:

None

Definition at line 752 of file stm32l4xx_ll_usart.h.

Set Oversampling to 8-bit or 16-bit mode CR1 OVER8 LL_USART_SetOverSampling.

Parameters:

USARTx	USART Instance
OverSampling	This parameter can be one of the following values: LL_USART_OVERSAMPLING_16 LL_USART_OVERSAMPLING_8

Return values:

None

Definition at line 723 of file stm32l4xx_ll_usart.h.

Configure Parity (enabled/disabled and parity mode if enabled).

Note:

This function selects if hardware parity control (generation and detection) is enabled or disabled. When the parity control is enabled (Odd or Even), computed parity bit is inserted at the MSB position (9th or 8th bit depending on data width) and parity is checked on the received data. CR1 PS LL_USART_SetParity
CR1 PCE LL_USART_SetParity

Parameters:

USARTx	USART Instance
ParityMode	This parameter can be one of the following values: LL_USART_PARITY_NONE LL_USART_PARITY_EVEN LL_USART_PARITY_ODD

Return values:

None

Definition at line 605 of file stm32l4xx_ll_usart.h.

Configure RX pin active level logic CR2 RXINV LL_USART_SetRXPinLevel.

Parameters:

USARTx	USART Instance
PinInvMethod	This parameter can be one of the following values: LL_USART_RXPIN_LEVEL_STANDARD LL_USART_RXPIN_LEVEL_INVERTED

Return values:

None

Definition at line 999 of file stm32l4xx_ll_usart.h.

Set Receiver Time Out Value (expressed in nb of bits duration) RTOR RTO LL_USART_SetRxTimeout.

Parameters:

USARTx	USART Instance
Timeout	0..0x00FFFFFF

Return values:

None

Definition at line 1524 of file stm32l4xx_ll_usart.h.

Set the length of the stop bits CR2 STOP LL_USART_SetStopBitsLength.

Parameters:

USARTx	USART Instance
StopBits	This parameter can be one of the following values: LL_USART_STOPBITS_1 LL_USART_STOPBITS_1_5 LL_USART_STOPBITS_2

Return values:

None

Definition at line 912 of file stm32l4xx_ll_usart.h.

Configure transfer bit order (either Less or Most Significant Bit First)

Note:

MSB First means data is transmitted/received with the MSB first, following the start bit. LSB First means data is transmitted/received with data bit 0 first, following the start bit. CR2 MSBFIRST LL_USART_SetTransferBitOrder

Parameters:

USARTx	USART Instance
BitOrder	This parameter can be one of the following values: LL_USART_BITORDER_LSBFIRST LL_USART_BITORDER_MSBFIRST

Return values:

None

Definition at line 1084 of file stm32l4xx_ll_usart.h.

Configure simultaneously enabled/disabled states of Transmitter and Receiver CR1 RE LL_USART_SetTransferDirection
CR1 TE LL_USART_SetTransferDirection.

Parameters:

USARTx	USART Instance
Direction	This parameter can be one of the following values: LL_USART_DIRECTION_NONE LL_USART_DIRECTION_RX LL_USART_DIRECTION_TX LL_USART_DIRECTION_TX_RX

Return values:

None

Definition at line 570 of file stm32l4xx_ll_usart.h.

Configure TX pin active level logic CR2 TXINV LL_USART_SetTXPinLevel.

Parameters:

USARTx	USART Instance
PinInvMethod	This parameter can be one of the following values: LL_USART_TXPIN_LEVEL_STANDARD LL_USART_TXPIN_LEVEL_INVERTED

Return values:

None

Definition at line 1026 of file stm32l4xx_ll_usart.h.

Configure TX/RX pins swapping setting.

CR2 SWAP LL_USART_SetTXRXSwap

Parameters:

USARTx	USART Instance
SwapConfig	This parameter can be one of the following values: LL_USART_TXRX_STANDARD LL_USART_TXRX_SWAPPED

Return values:

None

Definition at line 972 of file stm32l4xx_ll_usart.h.

Set Receiver Wakeup method from Mute mode.

CR1 WAKE LL_USART_SetWakeUpMethod

Parameters:

USARTx	USART Instance
Method	This parameter can be one of the following values: LL_USART_WAKEUP_IDLELINE LL_USART_WAKEUP_ADDRESSMARK

Return values:

None

Definition at line 634 of file stm32l4xx_ll_usart.h.

Select event type for Wake UP Interrupt Flag (WUS[1:0] bits)

Note:

Macro IS_UART_WAKEUP_FROMSTOP_INSTANCE(USARTx) can be used to check whether or not Wake-up from Stop mode feature is supported by the USARTx instance. CR3 WUS LL_USART_SetWKUPType

Parameters:

USARTx	USART Instance
Type	This parameter can be one of the following values: LL_USART_WAKEUP_ON_ADDRESS LL_USART_WAKEUP_ON_STARTBIT LL_USART_WAKEUP_ON_RXNE

Return values:

None

Definition at line 1435 of file stm32l4xx_ll_usart.h.