DMA capability structure that can be reimplemented in specific HAL drivers. More...

#include <dma.h>

Public Member Functions
	inherit (vsf_peripheral_capability_t) vsf_dma_irq_mask_t irq_mask

	inherit (vsf_peripheral_capability_t) vsf_dma_irq_mask_t irq_mask
	Supported interrupt mask bits.

	inherit (vsf_peripheral_capability_t) vsf_dma_irq_mask_t irq_mask

Data Fields
uint8_t	channel_count
	Number of DMA channels.

uint8_t	irq_count

vsf_dma_channel_mode_t	supported_modes

uint32_t	max_transfer_count
	Maximum number of data items per transfer (0 means no limit)

uint8_t	addr_alignment
	Address alignment requirement in bytes (1 means no alignment required)

uint8_t	support_scatter_gather: 1
	Support scatter-gather transfer.

Detailed Description

DMA capability structure that can be reimplemented in specific HAL drivers.

Note: This structure defines the features supported by the DMA hardware. When reimplementing, all existing members must be preserved for compatibility.

Member Function Documentation

vsf_dma_capability_t::inherit ( vsf_peripheral_capability_t )

vsf_dma_capability_t::inherit ( vsf_peripheral_capability_t )

Supported interrupt mask bits.

vsf_dma_capability_t::inherit ( vsf_peripheral_capability_t )

uint8_t vsf_dma_capability_t::channel_count

Number of DMA channels.

uint8_t vsf_dma_capability_t::irq_count

Number of independent interrupt vectors for DMA. If irq_count < channel_count, some channels share interrupts.

vsf_dma_channel_mode_t vsf_dma_capability_t::supported_modes

Supported channel modes, use VSF_DMA_XXX_MASK to extract specific capabilities:

uint32_t vsf_dma_capability_t::max_transfer_count

Maximum number of data items per transfer (0 means no limit)

uint8_t vsf_dma_capability_t::addr_alignment

Address alignment requirement in bytes (1 means no alignment required)

uint8_t vsf_dma_capability_t::support_scatter_gather

Support scatter-gather transfer.