I'm using FatFs on SDMMC1 configured by CubeMX (v.4.23) on a STM32F722. Everything runs perfectly fine.
But when I activate DMA by
- enabling DMA template in FatFs
- creating DMA channel for SDMMC1 RX and TX
- enabling the DMA and SDMMC1 interrupts
I can see that the code in sd_diskio.c has changed, and two IRs have been generated.
But the mounting and/or reading of the SD card fails.
This worked with v.4.22 (even without creating DMA channels), but now doesn't.
What is missing here?