# Pearl 40% Pearl 40% is a keyboard designed by Koobaczech. It uses an Atmel ATMEGA32A MCU. ## Compiling and flashing These instructions are for building and flashing your Pearl 40% without Bootmapper Client. ### Requirements #### Windows (to be written, help needed) #### Mac Apart from regular QMK and AVR dependencies you need to install `bootloadHID`. You can install it with `homebrew` as follows: $ brew install --HEAD https://raw.githubusercontent.com/robertgzr/homebrew-tap/master/bootloadhid.rb If you don't use `homebrew` you can try following the compiling instructions defined below in the Linux section. #### Linux For Linux you require all regular QMK dependencies, but make sure you're using `gcc-avr` version 4.9 or higher. 4.8 and lower do not contain the proper definitions for ATMEGA32A MCUs and QMK will fail while attempting to compile a HEX for Pearl 40%. E.g. you cannot compile Pearl 40% HEX on a regular Ubuntu 14.04 as `gcc-avr` version is maxed to 4.8 on it. Additionally you need an operational `bootloadHID` binary. You can install `bootloadHID` by taking the following steps: $ git clone https://github.com/robertgzr/bootloadHID ~/tmp/bootloadHIDsrc $ cd ~/tmp/bootloadHIDsrc/commandline $ make VENDORID=0x16c0 PRODUCTID=0x05DF # vid and pid for atmega32a $ chmod +x bootloadHID && cp bootloadHID /usr/bin/bootloadHID Running `which bootloadHID` should return `/usr/bin/bootloadHID`. ### Compiling Enter the QMK root directory and compile a keymap with the following command: $ make pearl:<keymap> where `<keymap>` is a layout directory under the `pearl` directory. QMK should compile a HEX (called `pearl_<keymap>.hex`) for you, which you can flash using `bootloadHID`. ### Flashing To enable Pearl 40% bootloading mode, unplug the keyboard, then plug it in while holding `Esc` at the same time (the top-leftmost switch on the PCB, next to the USB connector). Once the board is in bootload mode, issue the following command (you might require `sudo` to perform the command): # assuming we're still in the QMK root dir where you compiled a HEX into $ bootloadHID -r ./pearl_<keymap>.hex You should see something similar to > Page size = <value> > Device size = <value>; <value> remaining > Uploading <value> bytes starting at 0 (0x0) > <value> ... <current value> where `<current value>` should be slowly increasing as the HEX is being flashed to the board. If there is some warning about `resource busy` it should still work OK. Once done the board underglow should turn red and the new firmware has been flashed. If you can't type on the board try plugging it in again (without holding any keys to prevent accidentally setting it into bootload mode again).