MCH2022 template app

This repository contains a template app for the MCH2022 badge. It is intended to be used as the basis for developing your own native ESP32 apps. See Getting Started

License

The source code contained in the main folder of this example is public domain / CC0 licensed, use it as you please.

Source code included as submodules is licensed separately, please check the following table for details.

Submodule	License	Author
esp-idf	Apache License 2.0	Espressif Systems (Shanghai) CO LTD
components/appfs	THE BEER-WARE LICENSE Revision 42	Jeroen Domburg jeroen@spritesmods.com
components/bus-i2c	MIT	Nicolai Electronics
components/i2c-bno055	MIT	Nicolai Electronics
components/mch2022-rp2040	MIT	Renze Nicolai
components/pax-graphics	MIT	Julian Scheffers
components/pax-keyboard	MIT	Julian Scheffers
components/sdcard	MIT	Nicolai Electronics
components/spi-ice40	MIT	Nicolai Electronics
components/spi-ili9341	MIT	Nicolai Electronics
components/ws2812	Unlicense / Public domain	None

Source the update_components.sh to update all the submodules to their corresponding tips.

How to make

git clone --recursive https://github.com/badgeteam/mch2022-template-app
cd mch2022-template-app
make prepare build install

The default target of the Makefile (the one executed if you just run make) installs the proper ESP-IDF version and all other dependencies, then builds the project and tries to install it on an attached Badge. Because this process checks all the dependencies for updates, this can become tedious during development, so you'll probably want to execute specific targets:

• prepare : install the SDK and dependencies
• clean : clean the build environment. This does NOT clean up installed dependencies.
• build : compiles the app and assembles a binary.
• install : this installs the binary that was build, you can only call install, it depends on build. Note installation is not and SHOULD NOT be performed with the typical idf.py flash call, see the note below for details.
• monitor : start the serial monitor to examine log output
• menuconfig : The IDF build system has a fairly elaborate configuration system that can be accessed via menuconfig. You'll know if you need it. Or try it out to explore.

Note: Why not to use idf.py flash to install my native app.

If you have previously used the IDF, you may have noticed that we don’t use idf.py flash to install the app on the Badge. (And if you haven’t, you can safely skip this section.)

The idf.py flash command assumes that the binary to flash is the main (and only) application for the device. This is not the case for the Badge, though. The main application is the launcher app, i.e. the app with the menu that starts by default. The make install target of the Makefile copies our newly created app into the appfs instead of overwriting the launcher. Once copied to the appfs, the launcher can find your app and it should appear in the apps menu.

Obviously you can use idf.py flash but you’ll delete the launcher app and would need to reinstall it later.