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chore: update readme for shorting instruction #89

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Jhalakupadhyay merged 1 commit into from
Jun 4, 2025
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chore: update readme for shorting instruction #89

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16 changes: 14 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,20 @@ Install [wchisp](https://github.com/ch32-rs/wchisp?tab=readme-ov-file#installing

Download prebuilt binaries from [release](https://github.com/fossasia/badgemagic-firmware/releases) or [the latest development builds](https://github.com/fossasia/badgemagic-firmware/tree/bin).

Make sure the battery is disconnected. Press and hold KEY2 (the button near the
USB port) while plugging in the USB to enter the bootloader. Then run:
Make the chip enter bootloader mode (ISP mode) by power cycling the chip while
the boot pin is pulled down in one of two ways:

- Disconnect the battery, press and hold KEY2 (the button near the USB port)
while plugging in the USB to enter the bootloader.
- Alternatively, connect the USB, press and hold KEY2, then short and release
the C3 capacitor.

Then check `dmesg` if the chip has entered the ISP mode with idVendor=4348 and
idProduct=55e0.

![c3](assets/burn-badge.svg)

Then run:

```sh
wchisp flash badgemagic-ch582.bin
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