Using the STM32F769 Disco, I've enable the external SDRAM using the FMC and can read/write that memory.
I also have both SAI audio and microSD interfaces working with DMA, as long as the memory target/destination is internal SRAM. However, DMA transfers don't work if I move those buffers to the external SDRAM space. For example, DMA transfers to an external buffer seem to complete ok, but the buffer contents remain unchanged. I'm assuming this can be made to work, based on the examples, but I don't see what I'm missing.
