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Zephyr project on STM32

   Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
  • Install host dependencies.
  • Import toolchain and SDK.
  • Create, configure, build and manage apps.
  • Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench

System Workbench for STM32

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F103ZGT boot loader failed: option bytes?

Posted by rallysjd on 2015-08-24 18:28

I have two F103ZGT boards from a Chinese OEM. I can config the boards to start the ROM boot loader, via the COM port. This works fine on one board, the other always took several hard resets before the ZGT identified itself to the loader utility. I was looking at Option Bytes, but not as far as I know saving anything, and now the boot loader won’t start at all. I was able to load my DFU code before the problem arose, and the board app can be updated via USB, so it is functional. Is it possible I wrote some option bytes and this has disabled the boot loader, or is there a chip/board problem? Maybe the LF oscillator? it seems to be functioning on my ‘scope.

Suggestions welcome.

SD

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