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WCH RISC-V Microcontroller Web Serial ISP

This is a serial ISP flashing tool for WCH RISC-V microcontrollers that runs in a web browser. Entirely self-contained, with no additional software, libraries, or drivers required.

It uses the JavaScript Web Serial browser API, and so requires support for this feature by the browser. At time of writing, only the following browsers feature support for the Web Serial API: Chrome version 89+, Edge version 89+, Opera version 76+. This tool does not work in FireFox and Safari, due to lack of support for the API.

You can find a hosted version of this tool on my website, at: https://www.stasisleak.uk/wchisp/.

Features

  • Connect using any available serial port (e.g. COM/TTY) interface.
  • Write, verify, and erase user application flash.
  • Read and write configuration option bytes.
  • Loads firmware images in these formats:
    • Intel Hex
    • S-Record
    • ELF
    • Raw binary
  • Load firmware from local file or external URL.
  • Can take query string parameters to auto-select device and/or auto-load firmware from URL.
  • Hex preview listing of loaded firmware image.

Currently supported RISC-V WCH microcontrollers:

  • CH32V00x
  • CH32L103
  • CH32V103
  • CH32V20x
  • CH32V30x
  • CH32X03x

Self-Hosting

If you want to deploy a copy of this tool to be hosted on your own web server, installation is simple:

  1. Copy all files and sub-folders to a location of your choice on your web server.
  2. Load that server URL in your web browser.
  3. Done! Nothing else required. 😄

Please note that it is not possible to run this tool locally by loading index.html into a browser (i.e. straight from the filesystem via file://) due to CORS JS module restrictions.

Licence

This work is licenced under the GNU Affero General Public License v3.0. See LICENCE.txt for details.