84 lines
4.6 KiB
Markdown
84 lines
4.6 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/#/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 `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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For Windows 10:
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Windows sometimes doesn't recognize the jj40. 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 `Backspace` (`Top Right Key`)). 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 jj40:<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 `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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## Recovery
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If you flash a bad hex (e.g. you have a V1 board without RGB and compile/flash blindly without editing your rules.mk), your jj40 is now semi-bricked and you're stuck unless you have access to an ISP. The [ISP Flashing Guide](https://docs.qmk.fm/#/isp_flashing_guide) contains very good (but somewhat generalized) information. However, the instructions below should get you up and running provided you have an Arduino or clone.
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### Arduino Setup
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1. Upload the ArduinoISP sketch onto your Arduino board (https://www.arduino.cc/en/Tutorial/ArduinoISP).
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2. Wire the Arduino to the jj40. Match the data pins on the Arduino to those on the jj40. "RST" usually goes to D10 on the Arduino. I didn't need a capacitor when using my Uno.
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3. Get a working bootloader from https://blog.winkeyless.kr/m/152. The file is called "main.hex" from the archive called "ps2avrGB_bootloader_161215.zip" Copy "main.hex" to your qmk folder.
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4. Burn the bootloader with the following command
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` avrdude -b 19200 -c avrisp -p atmega32 -v -e -U hfuse:w:0xD0:m -U lfuse:w:0x0F:m -U flash:w:main.hex:i -P comPORT`
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Change `comPORT` to whatever port is used by the Arduino (e.g. `com11` in Windows or `/dev/ttyACM0` in Linux). Use Device Manager in Windows to find the port being used. Use `ls /dev/tty*` in Linux.
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5. If this process is successful, you should now be able to upload normally.
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