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chore: update readme for shorting instruction

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Dien-Nhung Nguyen-Phu
2025-06-04 15:15:49 +07:00
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README.md
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@@ -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). 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 Make the chip enter bootloader mode (ISP mode) by power cycling the chip while
USB port) while plugging in the USB to enter the bootloader. Then run: 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 ```sh
wchisp flash badgemagic-ch582.bin wchisp flash badgemagic-ch582.bin

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