spicommon_dma_chan_alloc() function

Alloc DMA channel for SPI

Syntax

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Summary

Declaration

Definition

Argument

Description

host_id

SPI host ID

dma_chan

DMA channel to be used

out_dma_ctx

Actual DMA channel context (if you choose to assign a specific DMA channel, this will be the channel you assigned before)

- ESP_OK: On success - ESP_ERR_NO_MEM: No enough memory - ESP_ERR_NOT_FOUND: There is no available DMA channel

from examples