ra8_dma_request_t Struct Reference

Descriptor for a single DMA transfer. More...

#include <ra8_dma.h>

Data Fields
uintptr_t	src_addr
	Src address.
uintptr_t	dst_addr
	Dst address.
uint16_t	count
	Count.
ra8_dmac_width_t	width
	Width.
bool	src_inc
	Src inc.
bool	dst_inc
	Dst inc.
ra8_elc_event_t	trigger
	Trigger.
ra8_dma_complete_fn_t	on_complete
	On complete.
void *	ctx
	Ctx.

Detailed Description

Descriptor for a single DMA transfer.

Populate one of these and hand it to ra8_dma_request().

Fields:

• src_addr : Source address (bus-visible).
• dst_addr : Destination address.
• count : Number of elements to transfer; each element is 1 << width bytes.
• width : Transfer element width from ra8_dmac_width_t.
• src_inc : true to increment src_addr after each element.
• dst_inc : Same, for dst_addr.
• trigger : ELC event that triggers the next element (k_ra8_elc_event_none for software start).
• on_complete : Optional callback fired from ISR on DMAC transfer-end. nullptr for no callback.
• ctx : Passed to on_complete.

Definition at line 115 of file ra8_dma.h.

Field Documentation

count

uint16_t ra8_dma_request_t::count

Count.

Definition at line 118 of file ra8_dma.h.

Referenced by internal_make_dma_request(), internal_pack_dmac_cfg(), internal_validate_request(), ra8_gpt_read_dma(), ra8_gpt_write_dma(), ra8_spi_read_dma(), and ra8_spi_write_dma().

ctx

void* ra8_dma_request_t::ctx

Ctx.

Definition at line 124 of file ra8_dma.h.

Referenced by internal_make_dma_request(), ra8_dma_request(), ra8_gpt_read_dma(), ra8_gpt_write_dma(), ra8_spi_read_dma(), and ra8_spi_write_dma().

dst_addr

uintptr_t ra8_dma_request_t::dst_addr

Dst address.

Definition at line 117 of file ra8_dma.h.

Referenced by internal_make_dma_request(), internal_pack_dmac_cfg(), ra8_gpt_read_dma(), ra8_gpt_write_dma(), ra8_spi_read_dma(), and ra8_spi_write_dma().

dst_inc

bool ra8_dma_request_t::dst_inc

Dst inc.

Definition at line 121 of file ra8_dma.h.

Referenced by internal_make_dma_request(), internal_pack_dmac_cfg(), ra8_gpt_read_dma(), ra8_gpt_write_dma(), ra8_spi_read_dma(), and ra8_spi_write_dma().

on_complete

ra8_dma_complete_fn_t ra8_dma_request_t::on_complete

On complete.

Definition at line 123 of file ra8_dma.h.

Referenced by internal_make_dma_request(), ra8_dma_request(), ra8_gpt_read_dma(), ra8_gpt_write_dma(), ra8_spi_read_dma(), and ra8_spi_write_dma().

src_addr

uintptr_t ra8_dma_request_t::src_addr

Src address.

Definition at line 116 of file ra8_dma.h.

Referenced by internal_make_dma_request(), internal_pack_dmac_cfg(), ra8_gpt_read_dma(), ra8_gpt_write_dma(), ra8_spi_read_dma(), and ra8_spi_write_dma().

src_inc

bool ra8_dma_request_t::src_inc

Src inc.

Definition at line 120 of file ra8_dma.h.

Referenced by internal_make_dma_request(), internal_pack_dmac_cfg(), ra8_gpt_read_dma(), ra8_gpt_write_dma(), ra8_spi_read_dma(), and ra8_spi_write_dma().

trigger

ra8_elc_event_t ra8_dma_request_t::trigger

Trigger.

Definition at line 122 of file ra8_dma.h.

Referenced by internal_make_dma_request(), ra8_gpt_read_dma(), ra8_gpt_write_dma(), ra8_spi_read_dma(), and ra8_spi_write_dma().

width

ra8_dmac_width_t ra8_dma_request_t::width

Width.

Definition at line 119 of file ra8_dma.h.

Referenced by internal_make_dma_request(), internal_pack_dmac_cfg(), internal_validate_request(), ra8_gpt_read_dma(), ra8_gpt_write_dma(), ra8_spi_read_dma(), and ra8_spi_write_dma().

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The documentation for this struct was generated from the following file:

• libs/ra8_hal/inc/ra8_dma.h