Failed to flash firmware of CH55x

[Kashouryo]

I can not flash my CH554 with this tool

python -m ch55xtool -f C:\Users\Gigabyte\Documents\Keil\CH554EXAM\USB\U_DISK\EXAM1\EXAM1.bin -r
Found CH554.
BTVER: V2.31.
Failed to flash firmware of CH55x.

Do you need any other information? I am using a converted version of U_DISK example bin from their official example pack.

I am using Windows, with Zadig and libusb-win32 properly installed, I can see an unknown device that manufactured by WinChipHead.

[MarsTechHAN]

The error is caused by ch55x does not respond correctly during writing flash.
Can you flash it with the official WCH tool?

[Kashouryo]

Yes, I can flash it with the official tool

[Pe3ucTop]

I think this problem relay on wrong erase command, which erase only firs 8kb.
Because of that verification after flashing could definitely fail for big programs.
Problem was reported in #17 , there is first fix but probably not final.