rt_dma_slave_config Struct Reference

#include <dma.h>

Data Fields
enum rt_dma_transfer_direction	direction
enum rt_dma_slave_buswidth	src_addr_width
enum rt_dma_slave_buswidth	dst_addr_width
rt_ubase_t	src_addr
rt_ubase_t	dst_addr
rt_uint32_t	src_maxburst
rt_uint32_t	dst_maxburst
rt_uint32_t	src_port_window_size
rt_uint32_t	dst_port_window_size

Detailed Description

DMA slave channel configuration.

Passed to rt_dma_chan_config() to set up a channel before starting transfers. Defines transfer direction, address widths, fixed source/ destination addresses, and burst sizes.

Field Documentation

direction

enum rt_dma_transfer_direction rt_dma_slave_config::direction

Transfer direction (MEM_TO_DEV, DEV_TO_MEM, etc.)

src_addr_width

enum rt_dma_slave_buswidth rt_dma_slave_config::src_addr_width

Source bus width in bytes

dst_addr_width

enum rt_dma_slave_buswidth rt_dma_slave_config::dst_addr_width

Destination bus width in bytes

src_addr

rt_ubase_t rt_dma_slave_config::src_addr

Fixed source address (peripheral FIFO register)

dst_addr

rt_ubase_t rt_dma_slave_config::dst_addr

Fixed destination address (peripheral FIFO register)

src_maxburst

rt_uint32_t rt_dma_slave_config::src_maxburst

Maximum source burst size in transfer-width units

dst_maxburst

rt_uint32_t rt_dma_slave_config::dst_maxburst

Maximum destination burst size in transfer-width units

src_port_window_size

rt_uint32_t rt_dma_slave_config::src_port_window_size

Source port window size (for scatter-gather)

dst_port_window_size

rt_uint32_t rt_dma_slave_config::dst_port_window_size

Destination port window size (for scatter-gather)