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STM32F446 and FMC stops working

Question asked by VDM on Jul 4, 2017



I have an STM32F446 + external PSRAM.


Everything's working fine, but it seems that I have a bug in my software that sometimes (hard to reproduce) breaks the connection between the STM32 and PSRAM.


When it is the case, I cannot access the PSRAM anymore, and trying to do so with the debugger says "Error, CPU cannot read ..."


So I would say that the FMC stopped working.

Is there any "error" bit or "fault bit" somewhere that could help me finding the reason ?

Any easy way to restart FMC ?


Best regards,