MicroPython Forum (Archive)

Some more info from a gdb session: Looking at the fault information, I see that it's due to a bus fault caused by a PRECISEERR at address 0x8020200 (somewhere in flash). That region is all zeros, and is readable from gdb: (gdb) x/20w 0x8020200 0x8020200: 0x00000000 0x00000000 0x00000000 0x00000000 0...

I was able to get it back after plugging into a different USB port. Seems that the Mac USB stack had gotten confused somehow.

I built the NUCLEO_H743ZI binary from the latest HEAD and loaded it using deploy-stlink (and later using DFU). In both cases, I can interact with the VCP serial port just fine but the MSC disk doesn't work. When I connect the board via USB, I get a notification (this is on a Mac but I get the same t...

I just had the same issue.
I did a successfully, ran µPython for a bit, then it stopped responding.
When I went to re-program the board I couldn't even see the ST-Link.
I'd previously updated the ST-Link v3 firmware to the latest.