CMSIS DMA Driver Data Structures Type Documentation

 

_DMA_CFG_t

 

Location: Driver_DMA.h:266

 

 

Data Fields

Type	Name	Description
DMA_TRG_t	src_sel	DMA source target.
DMA_SRC_STEP_t	src_step	Source step mode.
DMA_WORD_SIZE_t	word_size	Source word size.
DMA_TRG_t	dst_sel	DMA destination target.
DMA_DST_STEP_t	dst_step	Destination step mode.
DMA_CH_PRI_t	ch_priority	Channel priority.
uint32_t	__pad0__	Reserved.

 

_DMA_ADDR_CFG_t

 

Location: Driver_DMA.h:280

 

 

Data Fields

Type	Name	Description
const void *	src_addr	Source address.
const void *	dst_addr	Destination address.
uint32_t	counter_len	Value which when reached triggers the counter event.
uint32_t	transfer_len	DMA transfer length.

 

_DMA_PRI_CFG_t

 

Location: Driver_DMA.h:291

 

 

Data Fields

Type	Name	Description
uint32_t	preempt_pri	Preempt priority.
uint32_t	__pad0__	Reserved.
uint32_t	subgrp_pri	Subgroup priority.
uint32_t	__pad1__	Reserved.

 

_DMA_STATUS_t

 

Location: Driver_DMA.h:302

 

 

Data Fields

Type	Name	Description
uint32_t	active	Transfer was started.
uint32_t	completed	Transfer was completed.
uint32_t	counter_reached	Counter value was reached.
uint32_t	buffer_fill_lvl	Error occurred.
uint32_t	__pad0__	Reserved.

 

_DRIVER_DMA_t

 

Location: Driver_DMA.h:314

 

 

Data Fields

Type	Name	Description
ARM_DRIVER_VERSION(*	GetVersion)(void)	Pointer to DMA_GetVersion : Get driver version.
int32_t(*	Initialize)(DMA_SignalEvent_t cb_event)	Pointer to DMA_Initialize : Initialize DMA driver.
int32_t(*	Configure)(DMA_SEL_t sel, const DMA_CFG_t *cfg, DMA_SignalEvent_t cb)	Pointer to DMA_Configure : Configure DMA channel.
int32_t(*	ConfigureWord)(DMA_SEL_t sel, uint32_t cfg, DMA_SignalEvent_t cb)	Pointer to DMA_ConfigureWord : Configure DMA channel.
int32_t(*	ConfigureAddr)(DMA_SEL_t sel, const DMA_ADDR_CFG_t *pri)	Pointer to DMA_ConfigureAddr : Configure DMA interrupt priority.
int32_t(*	SetInterruptPriority)(DMA_SEL_t sel, const DMA_PRI_CFG_t *pri)	Pointer to DMA_SetInterruptPriority : Configure DMA interrupt priority.
uint32_t(*	CreateConfigWord)(const DMA_CFG_t *cfg)	Pointer to DMA_CreateConfigWord : Create DMA channel configuration word.
void(*	SetConfigWord)(DMA_SEL_t sel, uint32_t cfg)	Pointer to DMA_SetConfigWord : Quickly update DMA channel configuration word.
int32_t(*	Start)(DMA_SEL_t sel)	Pointer to DMA_Start : Start DMA transfer.
int32_t(*	Stop)(DMA_SEL_t sel)	Pointer to DMA_Stop : Stop DMA transfer.
uint32_t(*	GetCounterValue)(DMA_SEL_t sel)	Pointer to DMA_GetCounterValue : Get the current channel transfer counter.
DMA_STATUS_t(*	GetStatus)(DMA_SEL_t sel)	Pointer to DMA_GetStatus : Returns DMA channel status.