Initialization and de-initialization functions

Functions
ErrorStatus	LL_DMA_DeInit (DMA_TypeDef *DMAx, uint32_t Channel)
	De-initialize the DMA registers to their default reset values.
ErrorStatus	LL_DMA_Init (DMA_TypeDef *DMAx, uint32_t Channel, LL_DMA_InitTypeDef *DMA_InitStruct)
	Initialize the DMA registers according to the specified parameters in DMA_InitStruct.
void	LL_DMA_StructInit (LL_DMA_InitTypeDef *DMA_InitStruct)
	Set each LL_DMA_InitTypeDef field to default value.

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Function Documentation

ErrorStatus LL_DMA_DeInit	(	DMA_TypeDef *	DMAx,
		uint32_t	Channel
	)

De-initialize the DMA registers to their default reset values.

Parameters:

DMAx	DMAx Instance
Channel	This parameter can be one of the following values: LL_DMA_CHANNEL_1 LL_DMA_CHANNEL_2 LL_DMA_CHANNEL_3 LL_DMA_CHANNEL_4 LL_DMA_CHANNEL_5 LL_DMA_CHANNEL_6 LL_DMA_CHANNEL_7 LL_DMA_CHANNEL_ALL

Return values:

An	ErrorStatus enumeration value: SUCCESS: DMA registers are de-initialized ERROR: DMA registers are not de-initialized

Definition at line 162 of file stm32l4xx_ll_dma.c.

References __LL_DMA_GET_CHANNEL_INSTANCE, assert_param, IS_LL_DMA_ALL_CHANNEL_INSTANCE, LL_AHB1_GRP1_ForceReset(), LL_AHB1_GRP1_PERIPH_DMA1, LL_AHB1_GRP1_PERIPH_DMA2, LL_AHB1_GRP1_ReleaseReset(), LL_DMA_CHANNEL_1, LL_DMA_CHANNEL_2, LL_DMA_CHANNEL_3, LL_DMA_CHANNEL_4, LL_DMA_CHANNEL_5, LL_DMA_CHANNEL_6, LL_DMA_CHANNEL_7, LL_DMA_CHANNEL_ALL, LL_DMA_ClearFlag_GI1(), LL_DMA_ClearFlag_GI2(), LL_DMA_ClearFlag_GI3(), LL_DMA_ClearFlag_GI4(), LL_DMA_ClearFlag_GI5(), LL_DMA_ClearFlag_GI6(), LL_DMA_ClearFlag_GI7(), LL_DMA_REQUEST_0, and LL_DMA_SetPeriphRequest().

ErrorStatus LL_DMA_Init	(	DMA_TypeDef *	DMAx,
		uint32_t	Channel,
		LL_DMA_InitTypeDef *	DMA_InitStruct
	)

Initialize the DMA registers according to the specified parameters in DMA_InitStruct.

Note:

To convert DMAx_Channely Instance to DMAx Instance and Channely, use helper macros :

• __LL_DMA_GET_INSTANCE
• __LL_DMA_GET_CHANNEL

Parameters:

DMAx	DMAx Instance
Channel	This parameter can be one of the following values: LL_DMA_CHANNEL_1 LL_DMA_CHANNEL_2 LL_DMA_CHANNEL_3 LL_DMA_CHANNEL_4 LL_DMA_CHANNEL_5 LL_DMA_CHANNEL_6 LL_DMA_CHANNEL_7
DMA_InitStruct	pointer to a LL_DMA_InitTypeDef structure.

Return values:

An	ErrorStatus enumeration value: SUCCESS: DMA registers are initialized ERROR: Not applicable

Definition at line 286 of file stm32l4xx_ll_dma.c.

References assert_param, LL_DMA_InitTypeDef::Direction, IS_LL_DMA_ALL_CHANNEL_INSTANCE, IS_LL_DMA_DIRECTION, IS_LL_DMA_MEMORYDATASIZE, IS_LL_DMA_MEMORYINCMODE, IS_LL_DMA_MODE, IS_LL_DMA_NBDATA, IS_LL_DMA_PERIPHDATASIZE, IS_LL_DMA_PERIPHINCMODE, IS_LL_DMA_PERIPHREQUEST, IS_LL_DMA_PRIORITY, LL_DMA_ConfigTransfer(), LL_DMA_SetDataLength(), LL_DMA_SetMemoryAddress(), LL_DMA_SetPeriphAddress(), LL_DMA_SetPeriphRequest(), LL_DMA_InitTypeDef::MemoryOrM2MDstAddress, LL_DMA_InitTypeDef::MemoryOrM2MDstDataSize, LL_DMA_InitTypeDef::MemoryOrM2MDstIncMode, LL_DMA_InitTypeDef::Mode, LL_DMA_InitTypeDef::NbData, LL_DMA_InitTypeDef::PeriphOrM2MSrcAddress, LL_DMA_InitTypeDef::PeriphOrM2MSrcDataSize, LL_DMA_InitTypeDef::PeriphOrM2MSrcIncMode, LL_DMA_InitTypeDef::PeriphRequest, and LL_DMA_InitTypeDef::Priority.

void LL_DMA_StructInit

(

LL_DMA_InitTypeDef *

DMA_InitStruct

)

Set each LL_DMA_InitTypeDef field to default value.

Parameters:

DMA_InitStruct

Pointer to a LL_DMA_InitTypeDef structure.

Return values:

None

Definition at line 362 of file stm32l4xx_ll_dma.c.

References LL_DMA_InitTypeDef::Direction, LL_DMA_DIRECTION_PERIPH_TO_MEMORY, LL_DMA_MDATAALIGN_BYTE, LL_DMA_MEMORY_NOINCREMENT, LL_DMA_MODE_NORMAL, LL_DMA_PDATAALIGN_BYTE, LL_DMA_PERIPH_NOINCREMENT, LL_DMA_PRIORITY_LOW, LL_DMA_REQUEST_0, LL_DMA_InitTypeDef::MemoryOrM2MDstAddress, LL_DMA_InitTypeDef::MemoryOrM2MDstDataSize, LL_DMA_InitTypeDef::MemoryOrM2MDstIncMode, LL_DMA_InitTypeDef::Mode, LL_DMA_InitTypeDef::NbData, LL_DMA_InitTypeDef::PeriphOrM2MSrcAddress, LL_DMA_InitTypeDef::PeriphOrM2MSrcDataSize, LL_DMA_InitTypeDef::PeriphOrM2MSrcIncMode, LL_DMA_InitTypeDef::PeriphRequest, and LL_DMA_InitTypeDef::Priority.