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. More...
__STATIC_INLINE void	LL_DAC_DisableDMAReq (DAC_TypeDef *DACx, uint32_t DAC_Channel)
	Disable DAC DMA transfer request of the selected channel. More...
__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) CR DMAEN1 LL_DAC_IsDMAReqEnabled CR DMAEN2 LL_DAC_IsDMAReqEnabled. More...
__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. More...

Detailed Description

Function Documentation

LL_DAC_DisableDMAReq()

__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(). 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 1366 of file stm32l4xx_ll_dac.h.

{
  CLEAR_BIT(DACx->CR,
            DAC_CR_DMAEN1 << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK));
}

LL_DAC_DMA_GetRegAddr()

__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); 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 1427 of file stm32l4xx_ll_dac.h.

{
  /* Retrieve address of register DHR12Rx, DHR12Lx or DHR8Rx depending on     */
  /* DAC channel selected.                                                    */
  return ((uint32_t)(__DAC_PTR_REG_OFFSET((DACx)->DHR12R1,
                                          ((DAC_Channel >> (Register & 0x1FUL)) & DAC_REG_DHR_REGOFFSET_MASK_POSBIT0))));
}

LL_DAC_EnableDMAReq()

__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(). 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 1345 of file stm32l4xx_ll_dac.h.

{
  SET_BIT(DACx->CR,
          DAC_CR_DMAEN1 << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK));
}

LL_DAC_IsDMAReqEnabled()

__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) 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 1386 of file stm32l4xx_ll_dac.h.

{
  return ((READ_BIT(DACx->CR,
                   DAC_CR_DMAEN1 << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK))
           == (DAC_CR_DMAEN1 << (DAC_Channel & DAC_CR_CHX_BITOFFSET_MASK))) ? 1UL : 0UL);
}