ra8_dmac_config_t Struct Reference

DMAC channel configuration. More...

#include <ra8_dmac.h>

Data Fields
uint32_t	src
	Source address (DMSAR).
uint32_t	dst
	Destination address (DMDAR).
uint16_t	count
	Transfer count (DMCRA low).
ra8_dmac_width_t	width
	Transfer element width.
bool	src_inc
	true: SM = increment, else fixed.
bool	dst_inc
	true: DM = increment, else fixed.
ra8_dmac_mode_t	mode
	Transfer mode (DMTMD.MD).
uint16_t	block_count
	DMCRB block/repeat count.
ra8_dmac_repeat_area_t	repeat_area
	DMTMD.DTS area select.
bool	irq_each
	Enable RPTIE/ESIE per repeat.
bool	enable_dtie
	Enable DMINT.DTIE on full end.

Detailed Description

DMAC channel configuration.

Mirrors the subset of FSP transfer_info_t that this project currently programmes. Defaults (zero-initialized struct) yield a software-triggered, normal-mode transfer with both pointers fixed and no IRQ – safe for the existing CEU / SSIE / SCI / SPI / GPT call sites.

Fields:

• src / dst : 32-bit bus addresses (DMSAR / DMDAR).
• count : transfer count, units = 1 << width bytes.
• width : transfer element size (DMTMD.SZ).
• src_inc / dst_inc: legacy increment-only flags. When set, the corresponding side is programmed with DMAMD.SM = 10b / DMAMD.DM = 10b. When clear, the side is fixed (00b).
• mode : DMTMD.MD transfer mode (defaults normal).
• block_count : DMCRB block / repeat count for non-normal modes. Ignored in normal mode.
• repeat_area : DMTMD.DTS area select (only used in repeat or block mode; otherwise forced to "none").
• irq_each : enable transfer-end IRQ even in per-block / per-repeat-size modes (DMINT.RPTIE | ESIE).
• enable_dtie : enable DMINT.DTIE (transfer-end IRQ at full completion).

Definition at line 121 of file ra8_dmac.h.

Field Documentation

block_count

uint16_t ra8_dmac_config_t::block_count

DMCRB block/repeat count.

Definition at line 129 of file ra8_dmac.h.

Referenced by internal_program_channel(), and ra8_dmac_start_block().

count

uint16_t ra8_dmac_config_t::count

Transfer count (DMCRA low).

Definition at line 124 of file ra8_dmac.h.

Referenced by internal_dmcra_value(), and internal_pack_dmac_cfg().

dst

uint32_t ra8_dmac_config_t::dst

Destination address (DMDAR).

Definition at line 123 of file ra8_dmac.h.

Referenced by internal_pack_dmac_cfg(), and internal_program_channel().

dst_inc

bool ra8_dmac_config_t::dst_inc

true: DM = increment, else fixed.

Definition at line 127 of file ra8_dmac.h.

Referenced by internal_pack_dmac_cfg(), and internal_program_channel().

enable_dtie

bool ra8_dmac_config_t::enable_dtie

Enable DMINT.DTIE on full end.

Definition at line 132 of file ra8_dmac.h.

Referenced by internal_dmint_value().

irq_each

bool ra8_dmac_config_t::irq_each

Enable RPTIE/ESIE per repeat.

Definition at line 131 of file ra8_dmac.h.

Referenced by internal_dmint_value().

mode

ra8_dmac_mode_t ra8_dmac_config_t::mode

Transfer mode (DMTMD.MD).

Definition at line 128 of file ra8_dmac.h.

Referenced by internal_dmcra_value(), internal_dmint_value(), internal_dmtmd_value(), internal_program_channel(), internal_start_with_mode(), and internal_validate_cfg().

repeat_area

ra8_dmac_repeat_area_t ra8_dmac_config_t::repeat_area

DMTMD.DTS area select.

Definition at line 130 of file ra8_dmac.h.

Referenced by internal_dmtmd_value().

src

uint32_t ra8_dmac_config_t::src

Source address (DMSAR).

Definition at line 122 of file ra8_dmac.h.

Referenced by internal_pack_dmac_cfg(), and internal_program_channel().

src_inc

bool ra8_dmac_config_t::src_inc

true: SM = increment, else fixed.

Definition at line 126 of file ra8_dmac.h.

Referenced by internal_pack_dmac_cfg(), and internal_program_channel().

width

ra8_dmac_width_t ra8_dmac_config_t::width

Transfer element width.

Definition at line 125 of file ra8_dmac.h.

Referenced by internal_dmtmd_value(), internal_pack_dmac_cfg(), and internal_validate_cfg().

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

• libs/ra8_hal/inc/ra8_dmac.h