STM32F439xx HAL User Manual: Initialization and de-initialization functions

STM32F439xx HAL User Manual

Functions
uint32_t	LL_DMA_DeInit (DMA_TypeDef *DMAx, uint32_t Stream)
	De-initialize the DMA registers to their default reset values.
uint32_t	LL_DMA_Init (DMA_TypeDef DMAx, uint32_t Stream, 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.

Function Documentation

uint32_t LL_DMA_DeInit	(	DMA_TypeDef *	DMAx,
		uint32_t	Stream
	)

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

Parameters:

DMAx	DMAx Instance
Stream	This parameter can be one of the following values: LL_DMA_STREAM_0 LL_DMA_STREAM_1 LL_DMA_STREAM_2 LL_DMA_STREAM_3 LL_DMA_STREAM_4 LL_DMA_STREAM_5 LL_DMA_STREAM_6 LL_DMA_STREAM_7 LL_DMA_STREAM_ALL

Return values:

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

Definition at line 172 of file stm32f4xx_ll_dma.c.

References __LL_DMA_GET_STREAM_INSTANCE, assert_param, IS_LL_DMA_ALL_STREAM_INSTANCE, LL_AHB1_GRP1_ForceReset(), LL_AHB1_GRP1_PERIPH_DMA1, LL_AHB1_GRP1_PERIPH_DMA2, LL_AHB1_GRP1_ReleaseReset(), LL_DMA_CHANNEL_0, LL_DMA_DisableStream(), LL_DMA_SetChannelSelection(), LL_DMA_STREAM_0, LL_DMA_STREAM_1, LL_DMA_STREAM_2, LL_DMA_STREAM_3, LL_DMA_STREAM_4, LL_DMA_STREAM_5, LL_DMA_STREAM_6, LL_DMA_STREAM_7, LL_DMA_STREAM_ALL, and LL_DMA_WriteReg.

uint32_t LL_DMA_Init	(	DMA_TypeDef *	DMAx,
		uint32_t	Stream,
		LL_DMA_InitTypeDef *	DMA_InitStruct
	)

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

Note:

To convert DMAx_Streamy Instance to DMAx Instance and Streamy, use helper macros :

Parameters:

DMAx	DMAx Instance
Stream	This parameter can be one of the following values: LL_DMA_STREAM_0 LL_DMA_STREAM_1 LL_DMA_STREAM_2 LL_DMA_STREAM_3 LL_DMA_STREAM_4 LL_DMA_STREAM_5 LL_DMA_STREAM_6 LL_DMA_STREAM_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 301 of file stm32f4xx_ll_dma.c.

References assert_param, LL_DMA_InitTypeDef::Channel, LL_DMA_InitTypeDef::Direction, LL_DMA_InitTypeDef::FIFOMode, LL_DMA_InitTypeDef::FIFOThreshold, IS_LL_DMA_ALL_STREAM_INSTANCE, IS_LL_DMA_CHANNEL, IS_LL_DMA_DIRECTION, IS_LL_DMA_FIFO_MODE_STATE, IS_LL_DMA_FIFO_THRESHOLD, IS_LL_DMA_MEMORY_BURST, IS_LL_DMA_MEMORYDATASIZE, IS_LL_DMA_MEMORYINCMODE, IS_LL_DMA_MODE, IS_LL_DMA_NBDATA, IS_LL_DMA_PERIPHDATASIZE, IS_LL_DMA_PERIPHERAL_BURST, IS_LL_DMA_PERIPHINCMODE, IS_LL_DMA_PRIORITY, LL_DMA_ConfigFifo(), LL_DMA_ConfigTransfer(), LL_DMA_FIFOMODE_DISABLE, LL_DMA_SetChannelSelection(), LL_DMA_SetDataLength(), LL_DMA_SetMemoryAddress(), LL_DMA_SetMemoryBurstxfer(), LL_DMA_SetPeriphAddress(), LL_DMA_SetPeriphBurstxfer(), LL_DMA_InitTypeDef::MemBurst, LL_DMA_InitTypeDef::MemoryOrM2MDstAddress, LL_DMA_InitTypeDef::MemoryOrM2MDstDataSize, LL_DMA_InitTypeDef::MemoryOrM2MDstIncMode, LL_DMA_InitTypeDef::Mode, LL_DMA_InitTypeDef::NbData, LL_DMA_InitTypeDef::PeriphBurst, LL_DMA_InitTypeDef::PeriphOrM2MSrcAddress, LL_DMA_InitTypeDef::PeriphOrM2MSrcDataSize, LL_DMA_InitTypeDef::PeriphOrM2MSrcIncMode, 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 401 of file stm32f4xx_ll_dma.c.

References LL_DMA_InitTypeDef::Channel, LL_DMA_InitTypeDef::Direction, LL_DMA_InitTypeDef::FIFOMode, LL_DMA_InitTypeDef::FIFOThreshold, LL_DMA_CHANNEL_0, LL_DMA_DIRECTION_PERIPH_TO_MEMORY, LL_DMA_FIFOMODE_DISABLE, LL_DMA_FIFOTHRESHOLD_1_4, LL_DMA_MBURST_SINGLE, LL_DMA_MDATAALIGN_BYTE, LL_DMA_MEMORY_NOINCREMENT, LL_DMA_MODE_NORMAL, LL_DMA_PBURST_SINGLE, LL_DMA_PDATAALIGN_BYTE, LL_DMA_PERIPH_NOINCREMENT, LL_DMA_PRIORITY_LOW, LL_DMA_InitTypeDef::MemBurst, LL_DMA_InitTypeDef::MemoryOrM2MDstAddress, LL_DMA_InitTypeDef::MemoryOrM2MDstDataSize, LL_DMA_InitTypeDef::MemoryOrM2MDstIncMode, LL_DMA_InitTypeDef::Mode, LL_DMA_InitTypeDef::NbData, LL_DMA_InitTypeDef::PeriphBurst, LL_DMA_InitTypeDef::PeriphOrM2MSrcAddress, LL_DMA_InitTypeDef::PeriphOrM2MSrcDataSize, LL_DMA_InitTypeDef::PeriphOrM2MSrcIncMode, and LL_DMA_InitTypeDef::Priority.