Add 'bootloadHID' flash target (#5587)

* Add 'bootloadHID' flash target

* Prep for flash target

* Add :flash support

* Align bootloader wait messages

Co-Authored-By: Drashna Jaelre <drashna@live.com>

* Update template to suggest use of :flash

1 files changed, 70 insertions, 0 deletions

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+# BootloadHID Flashing Instructions and Bootloader Information
+
+ps2avr(GB) boards use an ATmega32A microcontroller and a different bootloader. It is not flashable using the regular QMK methods.
+
+General flashing sequence:
+
+1. Enter the bootloader using any of the following methods:
+    * Tap the `RESET` keycode (may not work on all devices)
+    * Hold the salt key while plugging the keyboard in (usually documented within keyboard readme) 
+2. Wait for the OS to detect the device
+3. Flash a .hex file
+4. Reset the device into application mode (may be done automatically)
+
+## bootloadHID Flashing Target
+
+Using the QMK installation script, detailed [here](newbs_getting_started.md), the required bootloadHID tools should be automatically installed.
+
+To flash via the command line, use the target `:bootloadHID` by executing the following command:
+
+    make <keyboard>:<keymap>:bootloadHID
+
+## GUI Flashing
+
+### Windows
+1. Download [HIDBootFlash](http://vusb.wikidot.com/project:hidbootflash).
+2. Place your keyboard into reset. 
+3. Ensure the configured VendorID is `16c0` and ProductID is `05df`
+4. Press the `Find Device` button and ensure that your keyboard is found.
+5. Press the `Open .hex File` button and locate the `.hex` file you created.
+6. Press the `Flash Device` button and wait for the process to complete.
+
+## Command Line Flashing
+
+1. Place your keyboard into reset. 
+2. Flash the board by typing `bootloadHID -r` followed by the path to your `.hex` file.
+
+### Windows Manual Installation
+For MSYS2:
+1. Download the BootloadHID firmware package from https://www.obdev.at/downloads/vusb/bootloadHID.2012-12-08.tar.gz.
+2. Extract contents using a compatible tool, for example 7-Zip.
+3. Add to the MSYS path by copying `commandline/bootloadHID.exe` from the extracted archive to your MSYS2 installation, typically `C:\msys64\usr\bin`.
+
+For native Windows flashing, the `bootloadHID.exe` can be used outside of the MSYS2 environment.
+
+### Linux Manual Installation
+1. Install libusb development dependency:
+    ```bash
+    # This depends on OS - for Debian the following works
+    sudo apt-get install libusb-dev
+    ```
+2. Download the BootloadHID firmware package:
+    ```
+    wget https://www.obdev.at/downloads/vusb/bootloadHID.2012-12-08.tar.gz -O - | tar -xz -C /tmp
+    ```
+3. Build the bootloadHID executable:
+    ```
+    cd /tmp/bootloadHID.2012-12-08/commandline/
+    make
+    sudo cp bootloadHID /usr/local/bin
+    ```
+
+### MacOS Manual Installation
+1. Install Homebrew by typing the following:
+    ```
+    /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+    ```
+2. Install the following packages:
+    ```
+    brew install --HEAD https://raw.githubusercontent.com/robertgzr/homebrew-tap/master/bootloadhid.rb
+    ```