mirror of
https://github.com/Keychron/qmk_firmware.git
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54 lines
2.1 KiB
Markdown
54 lines
2.1 KiB
Markdown
# jj40
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A compact 40% (12x4) ortholinear keyboard kit made and KPRepublic on AliExpress.
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Keyboard Maintainer: [QMK Community](https://github.com/qmk)
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Hardware Supported: Atmega32A
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Hardware Availability: [AliExpress](https://www.aliexpress.com/store/product/jj40-Custom-Mechanical-Keyboard-40-PCB-programmed-40-planck-layouts-bface-firmware-gh40/3034003_32828781103.html)
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Make example for this keyboard (after setting up your build environment):
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make jj40:default:program
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See [build environment setup](https://docs.qmk.fm/build_environment_setup.html) then the [make instructions](https://docs.qmk.fm/make_instructions.html) for more information.
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Note that this is a complete replacement for the firmware, so you won't be
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using Bootmapper Client to change any keyboard settings, since not all the
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USB report options are supported.
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In addition you may need the AVR toolchain and `bootloadHID` for flashing:
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```
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$ brew cask install crosspack-avr
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$ brew install --HEAD https://raw.githubusercontent.com/robertgzr/homebrew-tap/master/bootloadhid.rb
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```
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In order to use the `./program` script, which can reboot the board into
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the bootloader, you'll need Python 2 with PyUSB installed:
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```
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$ pip install pyusb
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```
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If you prefer, you can just build it and flash the firmware directly with
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`bootloadHID` if you boot the board while holding down `Backspace` (`Top Right Key`) to keep it
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in the bootloader:
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```
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$ make jj40
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$ bootloadHID -r jj40_default.hex
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```
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## Troubleshooting
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1. Try plugging the board in while pressing `Backspace` (`Top Right Key`). This will force it
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to boot only the bootloader without loading the firmware. Once this is
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done, just reflash the board with the original firmware.
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2. Sometimes USB hubs can act weird, so try connecting the board directly
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to your computer or plugging/unplugging the USB hub.
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3. If you get an error such as "Resource Unavailable" when attemting to flash
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on Linux, you may want to compile and run `tools/usb_detach.c`. See `tools/README.md`
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for more info.
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