Run DMA while ICache and DCache are enables

[HAlzo]

Hello,

I read the input data over SPI DMA, but when I added the AI part ICache and DCache are enabled.

The problem is that when ICache and DCache are enabled, the SPI DMA is not working.

How can I overcome this problem?

[Tesla DeLorean · Accepted solution]

You'd have to manage the cache coherency via Clean / Invalidate DCache by Address functions.

[HAlzo]

Thanks for Info

I found more details in the following links

https://community.st.com/s/question/0D50X00009XkhUW/hint-dma-and-cache-coherency

https://www.st.com/content/ccc/resource/technical/document/application_note/group0/08/dd/25/9c/4d/83/43/12/DM00272913/files/DM00272913.pdf/jcr:content/translations/en.DM00272913.pdf