I'm working with the F7 microcontroller and MXCube v1.8.0 for the uC peripherals configuration. The sdcard interface is configured to use DMA for the RX and TX operations.
I can successfully open/close/read files, but when trying to write large chunks, i get into some issues.
I open the file with the rewrite flag.
The data that needs to be written is stored in the SDRAM, so i just send a pointer to the beginning of the data in the SDRAM, and the size (about 970KB) to the f_write function.
After a random amount of written data (can be 2KB and also 40KB), DMA transfer error is triggered, which results in the FR_DISK_ERR.
When updated the code to write the data in chunks of 512 bytes (loop of f_write with maximum size of 512), the full data is written successfully.
Any ideas what i am doing wrong, or what might be the issue?
I did try the bug fixes for the FATFS, suggested here, but non of them solved the issue.