Data Structures

General Description

Data Structures
struct	cy_stc_axidmac_descriptor_t
	AXIDMAC descriptor structure type. More...
struct	cy_stc_axidmac_descriptor_config_t
	This structure is a configuration structure pre-initialized by user and passed as a parameter to the Cy_AXIDMAC_Descriptor_Init(). More...
struct	cy_stc_axidmac_channel_config_t
	This structure holds the initialization values for the AXIDMAC channel. More...

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Data Structure Documentation

cy_stc_axidmac_descriptor_t

struct cy_stc_axidmac_descriptor_t

Data Fields
uint32_t	ctl	Descriptor control
uint32_t	src	Descriptor source holds the base address of source location
uint32_t	dst	Descriptor destination holds the base address of destination location
uint32_t	mSize	Descriptor memory copy size. Valid range is 0...16777216
uint32_t	xSize	Descriptor X loop size. Valid range is 0...65535
int32_t	xIncr	Descriptor X loop increment. Valid range is -32768...32767
uint32_t	ySize	Descriptor Y loop size. Valid range is 0...65535
int32_t	yIncr	Descriptor Y loop increment. Valid range is -32768...32767
uint32_t	nextPtr	Descriptor next pointer

cy_stc_axidmac_descriptor_config_t

struct cy_stc_axidmac_descriptor_config_t

Data Fields
cy_en_axidmac_retrigger_t	retrigger	Specifies whether the AXIDMA controller should wait for the input trigger to be deactivated.
cy_en_axidmac_trigger_type_t	interruptType	Sets the event that triggers an interrupt. See cy_en_axidmac_trigger_type_t.
cy_en_axidmac_trigger_type_t	triggerOutType	Sets the event that triggers an output. See cy_en_axidmac_trigger_type_t.
cy_en_axidmac_channel_state_t	channelState	Specifies whether the channel is enabled or disabled on completion of descriptor see cy_en_axidmac_channel_state_t.
cy_en_axidmac_trigger_type_t	triggerInType	Sets what type of transfer is triggered. See cy_en_axidmac_trigger_type_t.
bool	dataPrefetch	Source data transfers are initiated as soon as the channel is enabled, the current descriptor pointer is NOT "0" and there is space available in the channel's data FIFO.
cy_en_axidmac_descriptor_type_t	descriptorType	The type of the descriptor. See cy_en_axidmac_descriptor_type_t.
void *	srcAddress	The source address of the transfer.
void *	dstAddress	The destination address of the transfer.
uint32_t	mCount	The number of bytes transfers in an M-loop.
int16_t	srcXincrement	The address increment of the source after each X-loop transfer. Valid range is -32768...32767.
int16_t	dstXincrement	The address increment of the destination after each X-loop transfer. Valid range is -32768...32767.
uint32_t	xCount	The number of transfers in an X-loop. Valid range (for all descriptors except scatter transfer) is 1...65536. For memory copy descriptors, the X count is a number of bytes (not a data transfer size). For scatter descriptors, the X count is a number of [address, data] pairs (two words each). Valid range is 1...32768.
int16_t	srcYincrement	The address increment of the source after each Y-loop transfer. Valid range is -32768...32767.
int16_t	dstYincrement	The address increment of the destination after each Y-loop transfer. Valid range is -32768...32767.
uint32_t	yCount	The number of X-loops in the Y-loop. Valid range is 1...65536.
cy_stc_axidmac_descriptor_t *	nextDescriptor	The next descriptor to chain after completion. A NULL value will signify no chaining.

cy_stc_axidmac_channel_config_t

struct cy_stc_axidmac_channel_config_t

Data Fields
cy_stc_axidmac_descriptor_t *	descriptor	The AXIDMAC descriptor associated with the channel being initialized.
uint32_t	priority	This parameter specifies the channel's priority.
bool	enable	This parameter specifies if the channel is enabled after initializing.
bool	bufferable	This parameter specifies whether a write transaction can complete. without waiting for the destination to accept the write transaction data.