Advanced Configurations services

Functions
__STATIC_INLINE void	LL_USART_ConfigAsyncMode (USART_TypeDef *USARTx)
	Perform basic configuration of USART for enabling use in Asynchronous Mode (UART)
__STATIC_INLINE void	LL_USART_ConfigSyncMode (USART_TypeDef *USARTx)
	Perform basic configuration of USART for enabling use in Synchronous Mode.
__STATIC_INLINE void	LL_USART_ConfigLINMode (USART_TypeDef *USARTx)
	Perform basic configuration of USART for enabling use in LIN Mode.
__STATIC_INLINE void	LL_USART_ConfigHalfDuplexMode (USART_TypeDef *USARTx)
	Perform basic configuration of USART for enabling use in Half Duplex Mode.
__STATIC_INLINE void	LL_USART_ConfigSmartcardMode (USART_TypeDef *USARTx)
	Perform basic configuration of USART for enabling use in Smartcard Mode.
__STATIC_INLINE void	LL_USART_ConfigIrdaMode (USART_TypeDef *USARTx)
	Perform basic configuration of USART for enabling use in Irda Mode.
__STATIC_INLINE void	LL_USART_ConfigMultiProcessMode (USART_TypeDef *USARTx)
	Perform basic configuration of USART for enabling use in Multi processor Mode (several USARTs connected in a network, one of the USARTs can be the master, its TX output connected to the RX inputs of the other slaves USARTs).

---

Function Documentation

__STATIC_INLINE void LL_USART_ConfigAsyncMode

(

USART_TypeDef *

USARTx

)

Perform basic configuration of USART for enabling use in Asynchronous Mode (UART)

Note:

In UART mode, the following bits must be kept cleared:

• LINEN bit in the USART_CR2 register,
• CLKEN bit in the USART_CR2 register,
• SCEN bit in the USART_CR3 register,
• IREN bit in the USART_CR3 register,
• HDSEL bit in the USART_CR3 register.

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

• Clear LINEN in CR2 using LL_USART_DisableLIN() function
• Clear CLKEN in CR2 using LL_USART_DisableSCLKOutput() function
• Clear SCEN in CR3 using LL_USART_DisableSmartcard() function
• Clear IREN in CR3 using LL_USART_DisableIrda() function
• Clear HDSEL in CR3 using LL_USART_DisableHalfDuplex() function

Other remaining configurations items related to Asynchronous Mode (as Baud Rate, Word length, Parity, ...) should be set using dedicated functions

Reference Manual to LL API cross reference:

CR2 LINEN LL_USART_ConfigAsyncMode
CR2 CLKEN LL_USART_ConfigAsyncMode
CR3 SCEN LL_USART_ConfigAsyncMode
CR3 IREN LL_USART_ConfigAsyncMode
CR3 HDSEL LL_USART_ConfigAsyncMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 2804 of file stm32l4xx_ll_usart.h.

__STATIC_INLINE void LL_USART_ConfigHalfDuplexMode

(

USART_TypeDef *

USARTx

)

Perform basic configuration of USART for enabling use in Half Duplex Mode.

Note:

In Half Duplex mode, the following bits must be kept cleared:

• LINEN bit in the USART_CR2 register,
• CLKEN bit in the USART_CR2 register,
• SCEN bit in the USART_CR3 register,
• IREN bit in the USART_CR3 register, This function also sets the UART/USART in Half Duplex mode.

Macro IS_UART_HALFDUPLEX_INSTANCE(USARTx) can be used to check whether or not Half-Duplex mode is supported by the USARTx instance.

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

• Clear LINEN in CR2 using LL_USART_DisableLIN() function
• Clear CLKEN in CR2 using LL_USART_DisableSCLKOutput() function
• Clear SCEN in CR3 using LL_USART_DisableSmartcard() function
• Clear IREN in CR3 using LL_USART_DisableIrda() function
• Set HDSEL in CR3 using LL_USART_EnableHalfDuplex() function

Other remaining configurations items related to Half Duplex Mode (as Baud Rate, Word length, Parity, ...) should be set using dedicated functions

Reference Manual to LL API cross reference:

CR2 LINEN LL_USART_ConfigHalfDuplexMode
CR2 CLKEN LL_USART_ConfigHalfDuplexMode
CR3 HDSEL LL_USART_ConfigHalfDuplexMode
CR3 SCEN LL_USART_ConfigHalfDuplexMode
CR3 IREN LL_USART_ConfigHalfDuplexMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 2921 of file stm32l4xx_ll_usart.h.

__STATIC_INLINE void LL_USART_ConfigIrdaMode

(

USART_TypeDef *

USARTx

)

Perform basic configuration of USART for enabling use in Irda Mode.

Note:

In IRDA mode, the following bits must be kept cleared:

• LINEN bit in the USART_CR2 register,
• STOP and CLKEN bits in the USART_CR2 register,
• SCEN bit in the USART_CR3 register,
• HDSEL bit in the USART_CR3 register. This function also sets the UART/USART in IRDA mode (IREN bit).

Macro IS_IRDA_INSTANCE(USARTx) can be used to check whether or not IrDA feature is supported by the USARTx instance.

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

• Clear LINEN in CR2 using LL_USART_DisableLIN() function
• Clear CLKEN in CR2 using LL_USART_DisableSCLKOutput() function
• Clear SCEN in CR3 using LL_USART_DisableSmartcard() function
• Clear HDSEL in CR3 using LL_USART_DisableHalfDuplex() function
• Configure STOP in CR2 using LL_USART_SetStopBitsLength() function
• Set IREN in CR3 using LL_USART_EnableIrda() function

Other remaining configurations items related to Irda Mode (as Baud Rate, Word length, Power mode, ...) should be set using dedicated functions

Reference Manual to LL API cross reference:

CR2 LINEN LL_USART_ConfigIrdaMode
CR2 CLKEN LL_USART_ConfigIrdaMode
CR2 STOP LL_USART_ConfigIrdaMode
CR3 SCEN LL_USART_ConfigIrdaMode
CR3 HDSEL LL_USART_ConfigIrdaMode
CR3 IREN LL_USART_ConfigIrdaMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 3006 of file stm32l4xx_ll_usart.h.

__STATIC_INLINE void LL_USART_ConfigLINMode

(

USART_TypeDef *

USARTx

)

Perform basic configuration of USART for enabling use in LIN Mode.

Note:

In LIN mode, the following bits must be kept cleared:

• STOP and CLKEN bits in the USART_CR2 register,
• SCEN bit in the USART_CR3 register,
• IREN bit in the USART_CR3 register,
• HDSEL bit in the USART_CR3 register. This function also set the UART/USART in LIN mode.

Macro IS_UART_LIN_INSTANCE(USARTx) can be used to check whether or not LIN feature is supported by the USARTx instance.

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

• Clear CLKEN in CR2 using LL_USART_DisableSCLKOutput() function
• Clear STOP in CR2 using LL_USART_SetStopBitsLength() function
• Clear SCEN in CR3 using LL_USART_DisableSmartcard() function
• Clear IREN in CR3 using LL_USART_DisableIrda() function
• Clear HDSEL in CR3 using LL_USART_DisableHalfDuplex() function
• Set LINEN in CR2 using LL_USART_EnableLIN() function

Other remaining configurations items related to LIN Mode (as Baud Rate, Word length, LIN Break Detection Length, ...) should be set using dedicated functions

Reference Manual to LL API cross reference:

CR2 CLKEN LL_USART_ConfigLINMode
CR2 STOP LL_USART_ConfigLINMode
CR2 LINEN LL_USART_ConfigLINMode
CR3 IREN LL_USART_ConfigLINMode
CR3 SCEN LL_USART_ConfigLINMode
CR3 HDSEL LL_USART_ConfigLINMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 2882 of file stm32l4xx_ll_usart.h.

__STATIC_INLINE void LL_USART_ConfigMultiProcessMode

(

USART_TypeDef *

USARTx

)

Perform basic configuration of USART for enabling use in Multi processor Mode (several USARTs connected in a network, one of the USARTs can be the master, its TX output connected to the RX inputs of the other slaves USARTs).

Note:

In MultiProcessor mode, the following bits must be kept cleared:

• LINEN bit in the USART_CR2 register,
• CLKEN bit in the USART_CR2 register,
• SCEN bit in the USART_CR3 register,
• IREN bit in the USART_CR3 register,
• HDSEL bit in the USART_CR3 register.

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

• Clear LINEN in CR2 using LL_USART_DisableLIN() function
• Clear CLKEN in CR2 using LL_USART_DisableSCLKOutput() function
• Clear SCEN in CR3 using LL_USART_DisableSmartcard() function
• Clear IREN in CR3 using LL_USART_DisableIrda() function
• Clear HDSEL in CR3 using LL_USART_DisableHalfDuplex() function

Other remaining configurations items related to Multi processor Mode (as Baud Rate, Wake Up Method, Node address, ...) should be set using dedicated functions

Reference Manual to LL API cross reference:

CR2 LINEN LL_USART_ConfigMultiProcessMode
CR2 CLKEN LL_USART_ConfigMultiProcessMode
CR3 SCEN LL_USART_ConfigMultiProcessMode
CR3 HDSEL LL_USART_ConfigMultiProcessMode
CR3 IREN LL_USART_ConfigMultiProcessMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 3045 of file stm32l4xx_ll_usart.h.

__STATIC_INLINE void LL_USART_ConfigSmartcardMode

(

USART_TypeDef *

USARTx

)

Perform basic configuration of USART for enabling use in Smartcard Mode.

Note:

In Smartcard mode, the following bits must be kept cleared:

• LINEN bit in the USART_CR2 register,
• IREN bit in the USART_CR3 register,
• HDSEL bit in the USART_CR3 register. This function also configures Stop bits to 1.5 bits and sets the USART in Smartcard mode (SCEN bit). Clock Output is also enabled (CLKEN).

Macro IS_SMARTCARD_INSTANCE(USARTx) can be used to check whether or not Smartcard feature is supported by the USARTx instance.

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

• Clear LINEN in CR2 using LL_USART_DisableLIN() function
• Clear IREN in CR3 using LL_USART_DisableIrda() function
• Clear HDSEL in CR3 using LL_USART_DisableHalfDuplex() function
• Configure STOP in CR2 using LL_USART_SetStopBitsLength() function
• Set CLKEN in CR2 using LL_USART_EnableSCLKOutput() function
• Set SCEN in CR3 using LL_USART_EnableSmartcard() function

Other remaining configurations items related to Smartcard Mode (as Baud Rate, Word length, Parity, ...) should be set using dedicated functions

Reference Manual to LL API cross reference:

CR2 LINEN LL_USART_ConfigSmartcardMode
CR2 STOP LL_USART_ConfigSmartcardMode
CR2 CLKEN LL_USART_ConfigSmartcardMode
CR3 HDSEL LL_USART_ConfigSmartcardMode
CR3 SCEN LL_USART_ConfigSmartcardMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 2962 of file stm32l4xx_ll_usart.h.

__STATIC_INLINE void LL_USART_ConfigSyncMode

(

USART_TypeDef *

USARTx

)

Perform basic configuration of USART for enabling use in Synchronous Mode.

Note:

In Synchronous mode, the following bits must be kept cleared:

• LINEN bit in the USART_CR2 register,
• SCEN bit in the USART_CR3 register,
• IREN bit in the USART_CR3 register,
• HDSEL bit in the USART_CR3 register. This function also sets the USART in Synchronous mode.

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 :

• Clear LINEN in CR2 using LL_USART_DisableLIN() function
• Clear IREN in CR3 using LL_USART_DisableIrda() function
• Clear SCEN in CR3 using LL_USART_DisableSmartcard() function
• Clear HDSEL in CR3 using LL_USART_DisableHalfDuplex() function
• Set CLKEN in CR2 using LL_USART_EnableSCLKOutput() function

Other remaining configurations items related to Synchronous Mode (as Baud Rate, Word length, Parity, Clock Polarity, ...) should be set using dedicated functions

Reference Manual to LL API cross reference:

CR2 LINEN LL_USART_ConfigSyncMode
CR2 CLKEN LL_USART_ConfigSyncMode
CR3 SCEN LL_USART_ConfigSyncMode
CR3 IREN LL_USART_ConfigSyncMode
CR3 HDSEL LL_USART_ConfigSyncMode

Parameters:

USARTx

USART Instance

Return values:

None

Definition at line 2841 of file stm32l4xx_ll_usart.h.