Cannot flash CH559 board, but WCHISP can do it.

[agatti]

Hello,

I seem to have a CH559 board with bootloader 2.31 that cannot be flashed using this program even though it can be flashed fine using the WCHISP tool under Windows. Using ch55xtool flashes fail with a verification error, although nothing gets written to the board.

Now, I've captured the USB traffic on Windows by WCHISP if that helps, along with the firmware I flashed - so you can eventually check what WCHISP is doing differently.

In the meantime is there anything I can do on my end to further debug the issue in ch55xtool?

Thanks!

firmware.bin.gz
usb_flash.pcapng.gz

[MarsTechHAN]

Hi, so my suggestion would be use the Wireshark to capture the USB sequence with the ch55xtool with debug on, comparing the difference in what the official tools send, and paste here. I dont have a ch559 with btver2.31 by my hand, but I think they use the same protocol as other ch55x。

[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.