Slave Select Pin Management

Functions
__STATIC_INLINE void	LL_SPI_SetNSSMode (SPI_TypeDef *SPIx, uint32_t NSS)
	Set NSS mode. More...
__STATIC_INLINE uint32_t	LL_SPI_GetNSSMode (SPI_TypeDef *SPIx)
	Get NSS mode CR1 SSM LL_SPI_GetNSSMode CR2 SSOE LL_SPI_GetNSSMode. More...
__STATIC_INLINE void	LL_SPI_EnableNSSPulseMgt (SPI_TypeDef *SPIx)
	Enable NSS pulse management. More...
__STATIC_INLINE void	LL_SPI_DisableNSSPulseMgt (SPI_TypeDef *SPIx)
	Disable NSS pulse management. More...
__STATIC_INLINE uint32_t	LL_SPI_IsEnabledNSSPulse (SPI_TypeDef *SPIx)
	Check if NSS pulse is enabled. More...

Detailed Description

Function Documentation

LL_SPI_DisableNSSPulseMgt()

__STATIC_INLINE void LL_SPI_DisableNSSPulseMgt

(

SPI_TypeDef *

SPIx

)

Disable NSS pulse management.

Note

This bit should not be changed when communication is ongoing. This bit is not used in SPI TI mode. CR2 NSSP LL_SPI_DisableNSSPulseMgt

Parameters

SPIx	SPI Instance

Return values

None

Definition at line 875 of file stm32l4xx_ll_spi.h.

{
  CLEAR_BIT(SPIx->CR2, SPI_CR2_NSSP);
}

LL_SPI_EnableNSSPulseMgt()

__STATIC_INLINE void LL_SPI_EnableNSSPulseMgt

(

SPI_TypeDef *

SPIx

)

Enable NSS pulse management.

Note

This bit should not be changed when communication is ongoing. This bit is not used in SPI TI mode. CR2 NSSP LL_SPI_EnableNSSPulseMgt

Parameters

SPIx	SPI Instance

Return values

None

Definition at line 863 of file stm32l4xx_ll_spi.h.

{
  SET_BIT(SPIx->CR2, SPI_CR2_NSSP);
}

LL_SPI_GetNSSMode()

__STATIC_INLINE uint32_t LL_SPI_GetNSSMode

(

SPI_TypeDef *

SPIx

)

Get NSS mode CR1 SSM LL_SPI_GetNSSMode
CR2 SSOE LL_SPI_GetNSSMode.

Parameters

SPIx	SPI Instance

Return values

Returned

value can be one of the following values: LL_SPI_NSS_SOFT LL_SPI_NSS_HARD_INPUT LL_SPI_NSS_HARD_OUTPUT

Definition at line 849 of file stm32l4xx_ll_spi.h.

{
  register uint32_t Ssm  = (READ_BIT(SPIx->CR1, SPI_CR1_SSM));
  register uint32_t Ssoe = (READ_BIT(SPIx->CR2,  SPI_CR2_SSOE) << 16U);
  return (Ssm | Ssoe);
}

LL_SPI_IsEnabledNSSPulse()

__STATIC_INLINE uint32_t LL_SPI_IsEnabledNSSPulse

(

SPI_TypeDef *

SPIx

)

Check if NSS pulse is enabled.

Note

This bit should not be changed when communication is ongoing. This bit is not used in SPI TI mode. CR2 NSSP LL_SPI_IsEnabledNSSPulse

Parameters

SPIx	SPI Instance

Return values

State

of bit (1 or 0).

Definition at line 887 of file stm32l4xx_ll_spi.h.

{
  return ((READ_BIT(SPIx->CR2, SPI_CR2_NSSP) == (SPI_CR2_NSSP)) ? 1UL : 0UL);
}

LL_SPI_SetNSSMode()

__STATIC_INLINE void LL_SPI_SetNSSMode	(	SPI_TypeDef *	SPIx,
		uint32_t	NSS
	)

Set NSS mode.

Note

LL_SPI_NSS_SOFT Mode is not used in SPI TI mode. CR1 SSM LL_SPI_SetNSSMode
CR2 SSOE LL_SPI_SetNSSMode

Parameters

SPIx	SPI Instance
NSS	This parameter can be one of the following values: LL_SPI_NSS_SOFT LL_SPI_NSS_HARD_INPUT LL_SPI_NSS_HARD_OUTPUT

Return values

None

Definition at line 833 of file stm32l4xx_ll_spi.h.

{
  MODIFY_REG(SPIx->CR1, SPI_CR1_SSM,  NSS);
  MODIFY_REG(SPIx->CR2, SPI_CR2_SSOE, ((uint32_t)(NSS >> 16U)));
}