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Delay after Write Memory for STM32F429 SPI bootloader

Question asked by LOUD on Oct 2, 2015
Latest reply on Oct 5, 2015 by LOUD
I have most of the commands implemented for the STM32F429 SPI bootloader, but Write Memory is not working. The documentation says that a delay is needed after the length, data, and checksum are provided, before requesting the ACK, but I cannot find the appropriate table with that information. I have found tables for the Erase times, including 16 KB sectors and up. However, since the ST bootloader Write Memory command takes, at most, 256 bytes, I don't see a way to determine the delay needed.

I've tried 4096 us (4.096 ms), but I still get NAK.

Any idea?