I have a project where I need to store data (~16 Mo) on a memory and be able to fetch the data fast (<36000 bits/s) with DMA because I have other signals to take care of.
Currently I use an SD card with the SD library, but it doesn't seems to use DMA because of the delay between sending.
Many people told me it shouldn't be that hard and I suppose so. My guess is that I can't configure the DMA and/or the SPI correctly.
I tried this a long time ago.
Can someone show me an example of SPI with DMA, or tips on how to configure both?