DMA Management

Functions
__STATIC_INLINE void	LL_DAC_EnableDMAReq (DAC_TypeDef *DACx, uint32_t DAC_Channel)
	Enable DAC DMA transfer request of the selected channel.
__STATIC_INLINE void	LL_DAC_DisableDMAReq (DAC_TypeDef *DACx, uint32_t DAC_Channel)
	Disable DAC DMA transfer request of the selected channel.
__STATIC_INLINE uint32_t	LL_DAC_IsDMAReqEnabled (DAC_TypeDef *DACx, uint32_t DAC_Channel)
	Get DAC DMA transfer request state of the selected channel.
__STATIC_INLINE uint32_t	LL_DAC_DMA_GetRegAddr (DAC_TypeDef *DACx, uint32_t DAC_Channel, uint32_t Register)
	Function to help to configure DMA transfer to DAC: retrieve the DAC register address from DAC instance and a list of DAC registers intended to be used (most commonly) with DMA transfer.

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Function Documentation

__STATIC_INLINE void LL_DAC_DisableDMAReq	(	DAC_TypeDef *	DACx,
		uint32_t	DAC_Channel
	)

Disable DAC DMA transfer request of the selected channel.

Note:

To configure DMA source address (peripheral address), use function LL_DAC_DMA_GetRegAddr().

Reference Manual to LL API cross reference:

CR DMAEN1 LL_DAC_DisableDMAReq
CR DMAEN2 LL_DAC_DisableDMAReq

Parameters:

DACx	DAC instance
DAC_Channel	This parameter can be one of the following values: LL_DAC_CHANNEL_1 LL_DAC_CHANNEL_2 (1) (1) On this STM32 serie, parameter not available on all devices. Refer to device datasheet for channels availability.

Return values:

None

Definition at line 1365 of file stm32l4xx_ll_dac.h.

References DAC_CR_CHX_BITOFFSET_MASK.

__STATIC_INLINE uint32_t LL_DAC_DMA_GetRegAddr	(	DAC_TypeDef *	DACx,
		uint32_t	DAC_Channel,
		uint32_t	Register
	)

Function to help to configure DMA transfer to DAC: retrieve the DAC register address from DAC instance and a list of DAC registers intended to be used (most commonly) with DMA transfer.

Note:

These DAC registers are data holding registers: when DAC conversion is requested, DAC generates a DMA transfer request to have data available in DAC data holding registers.

This macro is intended to be used with LL DMA driver, refer to function "LL_DMA_ConfigAddresses()". Example: LL_DMA_ConfigAddresses(DMA1, LL_DMA_CHANNEL_1, (uint32_t)&< array or variable >, LL_DAC_DMA_GetRegAddr(DAC1, LL_DAC_CHANNEL_1, LL_DAC_DMA_REG_DATA_12BITS_RIGHT_ALIGNED), LL_DMA_DIRECTION_MEMORY_TO_PERIPH);

Reference Manual to LL API cross reference:

DHR12R1 DACC1DHR LL_DAC_DMA_GetRegAddr
DHR12L1 DACC1DHR LL_DAC_DMA_GetRegAddr
DHR8R1 DACC1DHR LL_DAC_DMA_GetRegAddr
DHR12R2 DACC2DHR LL_DAC_DMA_GetRegAddr
DHR12L2 DACC2DHR LL_DAC_DMA_GetRegAddr
DHR8R2 DACC2DHR LL_DAC_DMA_GetRegAddr

Parameters:

DACx	DAC instance
DAC_Channel	This parameter can be one of the following values: LL_DAC_CHANNEL_1 LL_DAC_CHANNEL_2 (1) (1) On this STM32 serie, parameter not available on all devices. Refer to device datasheet for channels availability.
Register	This parameter can be one of the following values: LL_DAC_DMA_REG_DATA_12BITS_RIGHT_ALIGNED LL_DAC_DMA_REG_DATA_12BITS_LEFT_ALIGNED LL_DAC_DMA_REG_DATA_8BITS_RIGHT_ALIGNED

Return values:

DAC	register address

Definition at line 1426 of file stm32l4xx_ll_dac.h.

References __DAC_PTR_REG_OFFSET, and DAC_REG_DHR_REGOFFSET_MASK_POSBIT0.

__STATIC_INLINE void LL_DAC_EnableDMAReq	(	DAC_TypeDef *	DACx,
		uint32_t	DAC_Channel
	)

Enable DAC DMA transfer request of the selected channel.

Note:

To configure DMA source address (peripheral address), use function LL_DAC_DMA_GetRegAddr().

Reference Manual to LL API cross reference:

CR DMAEN1 LL_DAC_EnableDMAReq
CR DMAEN2 LL_DAC_EnableDMAReq

Parameters:

DACx	DAC instance
DAC_Channel	This parameter can be one of the following values: LL_DAC_CHANNEL_1 LL_DAC_CHANNEL_2 (1) (1) On this STM32 serie, parameter not available on all devices. Refer to device datasheet for channels availability.

Return values:

None

Definition at line 1344 of file stm32l4xx_ll_dac.h.

References DAC_CR_CHX_BITOFFSET_MASK.

__STATIC_INLINE uint32_t LL_DAC_IsDMAReqEnabled	(	DAC_TypeDef *	DACx,
		uint32_t	DAC_Channel
	)

Get DAC DMA transfer request state of the selected channel.

(0: DAC DMA transfer request is disabled, 1: DAC DMA transfer request is enabled)

Reference Manual to LL API cross reference:

CR DMAEN1 LL_DAC_IsDMAReqEnabled
CR DMAEN2 LL_DAC_IsDMAReqEnabled

Parameters:

DACx	DAC instance
DAC_Channel	This parameter can be one of the following values: LL_DAC_CHANNEL_1 LL_DAC_CHANNEL_2 (1) (1) On this STM32 serie, parameter not available on all devices. Refer to device datasheet for channels availability.

Return values:

State

of bit (1 or 0).

Definition at line 1385 of file stm32l4xx_ll_dac.h.

References DAC_CR_CHX_BITOFFSET_MASK.