mirror of
https://github.com/Keychron/qmk_firmware.git
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72 lines
3.7 KiB
Markdown
72 lines
3.7 KiB
Markdown
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# jj4x4
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A 4x4 keypad kit made and KPRepublic on AliExpress. This is a chopped off version of the jj40 with rearranged keys.
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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/item/jj4x4-jj4X4-16-keys-Custom-Mechanical-Keyboard-PCB-programmed-numpad-layouts-bface-firmware-with-rgb-bottom/32901955446.html?spm=2114.search0104.3.7.3ebf431ae1d9ic&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10130_10068_10547_319_317_10548_10545_10696_453_10084_454_10083_433_10618_431_10307_537_536_10902_10059_10884_10887_321_322_10103,searchweb201603_6,ppcSwitch_0&algo_expid=9d1891dd-80af-4793-a889-5a62e1fdfdd8-1&algo_pvid=9d1891dd-80af-4793-a889-5a62e1fdfdd8&transAbTest=ae803_5)
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Make example for this keyboard (after setting up your build environment):
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make jj4x4:default:program
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See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) 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` ([GitHub repo](https://github.com/whiteneon/bootloadHID)) for flashing:
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For macOS:
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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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For Linux:
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```
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$ sudo apt install libusb-dev
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$ wget https://www.obdev.at/downloads/vusb/bootloadHID.2012-12-08.tar.gz
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$ tar -xzf bootloadHID.2012-12-08.tar.gz
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$ cd bootloadHID.2012-12-08/commandline
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$ make
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$ sudo cp bootloadHID /usr/bin
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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 (or are having issues with a `program` flash), you can just build it (`make jj40:<keymap-name>` and flash the firmware (`.hex` file) directly with
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`bootloadHID` if you boot the board while holding down `8` (second from top, second from left, with usb plug is at the top) 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 jj4x4_default.hex
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```
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For Windows 10:
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Windows sometimes doesn't recognize the jj4x4. The easiest way of flashing a new layout is probably using [HIDBootFlash](http://vusb.wikidot.com/project:hidbootflash).
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1. Go to Windows Device Manager and find the keyboard (plug it in while holding down `8` (second from top, second from left, with usb plug is at the top)). It can be found under Human Interface Devices or under Keyboards.
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2. Go to properties and the Details tab to find the hardware ID. You want the VID and the PID (code after the underscore). Plug them into HIDBootFlash and hit Find Device.
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3. Use `make jj4x4:<keymap-name>` to generate the .hex file in the qmk basis folder. Select the .hex file in HIDBootFlash and press Flash Device.
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## Troubleshooting
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1. Try plugging the board in while pressing `8` (usb plug at top, second from top, second from left). 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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