Linux flash tools about ch554_sdcc HOT 7 OPEN

I've found one more: https://github.com/MarsTechHAN/ch552tool (a Python-based one). I believe this one also works under Linux (as I seem to recall using it at one point).

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Good point! We're still slowly working our way though a large stockpile of the older chips, which have the reverse problem of not being compatible with the newer programmers.

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I think VNPro supports old and new bootloader. At least, the version of VNPro that ch55xduino uses

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LibreCH55x seems to support the oldest bootloaders I've come across. It's the only one I've seen that supports bootloaders prior to 2.3.0, anyway.
https://github.com/rgwan/librech551/tree/master/usbisp

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https://github.com/ole00/chprog claims to support 1.x and 2.x bootloaders

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Would you know one that supports writing to the DataFlash area ?

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Finally got back to this project. Using my old parts with a 1.1 bootloader, I tested the following programmers:

• chflasher (python version) detected the part and programmed it successfully
• vnpro detected the part, but dumped out with a 'Not Supported' message.
• ch55xtool (really nice that it's on pypi) unfortunately crashed with an 'operation timed out'
• chprog gives useful status output, and programmed the part successfully
• librech554 also works

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