Been trying to get an test application working on a STM32F469NIH Discovery board.
Should be fairly simple - Write a file to the SD Card, with FatFS, the read back:
Try as I might, I couldn't get things working.
After a bit of debugging, I think the issue lies with the DMA callback functions. I'm using FW_F4 V1.27.1, on CubeIDE, and it seems that the supplied SD_DMATransmitCplt() function isn't quite complete, when compared to the SD_DMAReceiveCplt() function.
There seems to be a couple of things missing - Firstly the call to the callback function - This is a must for the SD interface, because there's a queue that is waited on. Without the callback function being called, nothing is ever put on the queue, so a timeout error is received.
The other important bit seems to be the line of code that unlocks the HAL. A sensible thing to do, as we've just finished transferring data. Again, without it, some other bits of code later on fail as the HAL is still locked.
So I copied the code from the RX complete, and that seems to make things work - See attached text file
The question is, am I on the right track here? I'd like to help improve things, but at the same time, I don't want to fix things worse. A proper fix is better than a band-aid.
