SAI DMA transfer handle, users should not touch the content of the handle. More...

#include <fsl_sai_sdma.h>

Data Fields
sdma_handle_t *	dmaHandle

uint8_t	bytesPerFrame

uint8_t	channel

uint8_t	channelNums

uint8_t	channelMask

uint8_t	fifoOffset

uint32_t	count

uint32_t	state

uint32_t	eventSource

sai_sdma_callback_t	callback

void *	userData

sdma_buffer_descriptor_t	bdPool [SAI_XFER_QUEUE_SIZE]

sai_transfer_t	saiQueue [SAI_XFER_QUEUE_SIZE]

size_t	transferSize [SAI_XFER_QUEUE_SIZE]

volatile uint8_t	queueUser

volatile uint8_t	queueDriver

Detailed Description

SAI DMA transfer handle, users should not touch the content of the handle.

Field Documentation

◆ bdPool

sdma_buffer_descriptor_t _sai_sdma_handle::bdPool[SAI_XFER_QUEUE_SIZE]

BD pool for SDMA transfer.

◆ bytesPerFrame

uint8_t _sai_sdma_handle::bytesPerFrame

Bytes in a frame

◆ callback

sai_sdma_callback_t _sai_sdma_handle::callback

Callback for users while transfer finish or error occurs

◆ channel

uint8_t _sai_sdma_handle::channel

start data channel

◆ channelMask

uint8_t _sai_sdma_handle::channelMask

enabled channel mask value, refernece _sai_channel_mask

◆ channelNums

uint8_t _sai_sdma_handle::channelNums

total transfer channel numbers, used for multififo

◆ count

uint32_t _sai_sdma_handle::count

The transfer data count in a DMA request

◆ dmaHandle

sdma_handle_t* _sai_sdma_handle::dmaHandle

DMA handler for SAI send

◆ eventSource

uint32_t _sai_sdma_handle::eventSource

SAI event source number

◆ fifoOffset

uint8_t _sai_sdma_handle::fifoOffset

fifo address offset between multifo

◆ queueDriver

volatile uint8_t _sai_sdma_handle::queueDriver

Index for driver to get the transfer data and size

◆ queueUser

volatile uint8_t _sai_sdma_handle::queueUser

Index for user to queue transfer.

◆ saiQueue

sai_transfer_t _sai_sdma_handle::saiQueue[SAI_XFER_QUEUE_SIZE]

Transfer queue storing queued transfer.

◆ state

uint32_t _sai_sdma_handle::state

Internal state for SAI SDMA transfer

◆ transferSize

size_t _sai_sdma_handle::transferSize[SAI_XFER_QUEUE_SIZE]

Data bytes need to transfer

◆ userData

void* _sai_sdma_handle::userData

User callback parameter

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

bsps/arm/imxrt/mcux-sdk/drivers/sai/fsl_sai_sdma.h

Data Fields