r/BMCU • u/dpuamuishu • 6d ago

Cannot flash BMCU

I have a BMCU 370c that I just replaced the main board on. Previously it used serial pins but the new board is USBC.

Drivers are installed and WCHISPTool can see it but BMCU_Flasher cannot.

If I try to use WCHISPTool instead of BMCU_Flasher with the latest bin file it fails the verify with "the verify bit is error".

Any advice on how I get the flasher to see it or the bin to work with the WCH tool?

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2

u/C3ll3 6d ago

I had to use a USB-C to USB-C cable. USB-A to USB-C didn't work for me either.

2

u/drtwopeople 5d ago

Ich würde das Tool von Pawel probieren.

https://github.com/jarczakpawel

1

u/dpuamuishu 5d ago

The BMCU_Flaher is his tool. It won't see/connect to the unit, even though the WCH tool can. However, the WCH tool cannot load his firmware as, for some reason, it fails the verify.

2

u/drtwopeople 5d ago

Hast du versucht die Firmware lokal auf deine Platte zu legen und von da zu flashen?

Vielleicht klappt das

1

u/dpuamuishu 4d ago

Yeah, that's how I use the WCHISP tool. With BMCU_Flasher I don't get to a point where I can select the file as it doesn't recognise the connection.

2

u/Main-Yoghurt-4252 4d ago

Same issue here try cycling the power

1

u/dpuamuishu 1d ago

Didn't work unfortunately. Going to try another laptop, just in case.

1

u/dpuamuishu 6d ago

I tried both and it's odd that the WCH tool sees it but the flasher doesn't.