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HDZero Goggle Firmware

Environment Setup

The firmware can either be built in a devcontainer or natively on a linux machine.

Note: decompressing the repository in Windows system may damage some files and prevent correct builds.

Devcontainer Setup

This repository supports the vscode devcontainer integration. To get started install docker, vscode and the decontainer extension. A prompt to reopen this repository in a container should appear.

Native Setup

CMake is required for generating the build files. A bash script is supplied to take care of the bootstrap process:

~/hdzero-goggle$ ./setup.sh

Building the Firmware

In either of the above scenarios the firmware can be built via make. An appropiate vscode build task ships with this repository as well.

~/hdzero-goggle$ cd build
~/hdzero-goggle/build$ make clean all -j `nproc`

The firmware is generated as ~/hdz_goggle/code/out/HDZERO_GOGGLE-x.x.x.bin Where x.x.x is the OTA_VER.RX_VER.VA_VER

Loading the Firmware

Firmware can be either flashed via goggle menu or alternatively be executed via the SD Card with a custom development script. An example of this development script is provided below. The goggles automatically checks to see if the develop.sh script exists in the root of the SD Card and if found develop.sh is then executed.

The following files must be placed in the root of SD Card in this example. This script will then check to see if HDZGOGGLE binary has been found during bootup and if found then executed.

Otherwise, if the HDZGOOGLE binary is not detected, the goggles will continue to load the built-in executable which was previously flashed.

SD Card File Hierarchy:

/develop.sh
/HDZGOOGLE

Development script (develop.sh):

#!/bin/sh

# Load via SD Card if found
if [ -e /mnt/extsd/HDZGOGGLE ]; then
	/mnt/extsd/HDZGOGGLE &
else
	/mnt/app/app/HDZGOGGLE &
fi

Building the Emulator

Goggle source code can be built natively on the host machine and used for debugging.

Library required

Requires build-essential tools and SDL2 development libraries (libsdl2-dev for debian) to be already installed.

sudo apt-get install build-essential libsdl2-dev

Build and Run

~/hdzero-goggle$ mkdir build_emu
~/hdzero-goggle$ cd build_emu
~/hdzero-goggle/build_emu$ cmake .. -DEMULATOR_BUILD=ON -DCMAKE_BUILD_TYPE=Debug
~/hdzero-goggle/build_emu$ make -j `nproc`
~/hdzero-goggle/build_emu$ ./HDZGOGGLE

Emulator Keys

a = right button press w = wheel up s = wheel down d = wheel center press Use F11 to toggle full screen where applicable.

Support and Developer Channels

Join the official Discord server here:

https://discord.gg/kGsnEDMb2V

Or the official Facebook group:

https://www.facebook.com/groups/hdzero

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