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 M0 LL_USART_ConfigCharacter
  CR1 M1 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
Parity	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_0_5 LL_USART_STOPBITS_1 LL_USART_STOPBITS_1_5 LL_USART_STOPBITS_2

Return values:

None

Definition at line 1078 of file stm32l4xx_ll_usart.h.

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

Note:

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

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 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 976 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 wake up 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 wake up 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 1356 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 571 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 1247 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 1437 of file stm32l4xx_ll_usart.h.

Receiver Disable CR1 RE LL_USART_DisableDirectionRx.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 646 of file stm32l4xx_ll_usart.h.

Transmitter Disable CR1 TE LL_USART_DisableDirectionTx.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 668 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 611 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 816 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 1496 of file stm32l4xx_ll_usart.h.

Disable Overrun detection CR3 OVRDIS LL_USART_DisableOverrunDetect.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1529 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 1411 of file stm32l4xx_ll_usart.h.

Disable Receiver Timeout CR2 RTOEN LL_USART_DisableRxTimeout.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1317 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 1002 of file stm32l4xx_ll_usart.h.

USART Enable CR1 UE LL_USART_Enable.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 557 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 1234 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 1424 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 635 of file stm32l4xx_ll_usart.h.

Transmitter Enable CR1 TE LL_USART_EnableDirectionTx.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 657 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 597 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 805 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 1485 of file stm32l4xx_ll_usart.h.

Enable Overrun detection CR3 OVRDIS LL_USART_EnableOverrunDetect.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1518 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 1398 of file stm32l4xx_ll_usart.h.

Enable Receiver Timeout CR2 RTOEN LL_USART_EnableRxTimeout.

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 1306 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 989 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 1295 of file stm32l4xx_ll_usart.h.

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

Note:

In case of non-initialized or invalid value stored in BRR register, value 0 will be returned. 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:

Baud

Rate

Definition at line 1624 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 1190 of file stm32l4xx_ll_usart.h.

Get Block Length value in reception RTOR BLEN LL_USART_GetBlockLength.

Parameters:

USARTx

USART Instance

Return values:

Value

between Min_Data=0x00 and Max_Data=0xFF

Definition at line 1690 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 917 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 948 of file stm32l4xx_ll_usart.h.

Return Word length (i.e.

nb of data bits, excluding start and stop bits) CR1 M0 LL_USART_GetDataWidth
CR1 M1 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 794 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 1474 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 886 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 (Value between Min_Data=0 and Max_Data=255)

Definition at line 1372 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 1385 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 854 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 736 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 1134 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:

Value

between Min_Data=0x00 and Max_Data=0x00FFFFFF

Definition at line 1667 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_0_5 LL_USART_STOPBITS_1 LL_USART_STOPBITS_1_5 LL_USART_STOPBITS_2

Definition at line 1046 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 1221 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 702 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 1161 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 1107 of file stm32l4xx_ll_usart.h.

Return Receiver Wake Up 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 763 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 1573 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 582 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 1260 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 624 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 827 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 1507 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 1540 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 1328 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 1015 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 1278 of file stm32l4xx_ll_usart.h.

Configure USART BRR register for achieving expected Baud Rate value.

Note:

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

Peripheral clock and Baud rate values provided as function parameters should be valid (Baud rate value != 0) 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	Baud Rate

Return values:

None

Definition at line 1593 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 1177 of file stm32l4xx_ll_usart.h.

Set Block Length value in reception RTOR BLEN LL_USART_SetBlockLength.

Parameters:

USARTx	USART Instance
BlockLength	Value between Min_Data=0x00 and Max_Data=0xFF

Return values:

None

Definition at line 1679 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
ClockPhase	This parameter can be one of the following values: LL_USART_PHASE_1EDGE LL_USART_PHASE_2EDGE

Return values:

None

Definition at line 902 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
ClockPolarity	This parameter can be one of the following values: LL_USART_POLARITY_LOW LL_USART_POLARITY_HIGH

Return values:

None

Definition at line 933 of file stm32l4xx_ll_usart.h.

Set Word length (i.e.

nb of data bits, excluding start and stop bits) CR1 M0 LL_USART_SetDataWidth
CR1 M1 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 779 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
HardwareFlowControl	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 1456 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
LastBitClockPulse	This parameter can be one of the following values: LL_USART_LASTCLKPULSE_NO_OUTPUT LL_USART_LASTCLKPULSE_OUTPUT

Return values:

None

Definition at line 870 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 841 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
Parity	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 721 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 1121 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	Value between Min_Data=0x00 and Max_Data=0x00FFFFFF

Return values:

None

Definition at line 1656 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_0_5 LL_USART_STOPBITS_1 LL_USART_STOPBITS_1_5 LL_USART_STOPBITS_2

Return values:

None

Definition at line 1031 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 1206 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
TransferDirection	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 686 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 1148 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 1094 of file stm32l4xx_ll_usart.h.

Set Receiver Wake Up 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 750 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 1557 of file stm32l4xx_ll_usart.h.