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How does the IMX6 SPI use DMA to transfer data?

Question asked by 其东 刘 on Jan 21, 2019
Latest reply on Feb 21, 2019 by 其东 刘

Hello everyone
I am using the IMX6Q development board of NXP official website. When I was using SPI for communication, I found that the SPI only uses DMA transfers when the bytes I transfer are larger than 64 bytes. When my data volume is less than 64 bytes, the SPI uses GPIO transmission. In my actual project, every byte I transfer is less than 64 bytes. However, because of the large amount of data, it is desirable to use DMA for transmission. Do you have any good suggestions?