Fast SD card access with SPI and DMA

Hi

Has anyone tested DMA with an SD card on the Zero? I know there is a DMA version of SdFat lin for the Arduino Due, the question is : is it going to happen on the samd21 core? It could be really great :slight_smile:

What we really need is for somebody to come up with a eMMC library so you can use SD cards in their native communications mode instead of falling back to SPI. That would really speed things up.