Minimal blink for attiny85 using avr-gcc and cmake

Compile AVR programs for an attiny85 using CMake. No dependencies on arduino. Based on https://github.com/tttapa/Arduino-AVR-CMake.

Instructions (Mac)

1. brew install avr-gcc
2. Install micronucleus

brew install pkg-config libusb libusb-compat libusb-dev
gh repo clone https://github.com/micronucleus/micronucleus
cd micronucleus/commandline
make install

3. Configure the project using CMake by running the following command:

   cmake -S. -Bbuild \
       -D CMAKE_TOOLCHAIN_FILE=cmake/toolchain/avr.toolchain.cmake \
       -D CMAKE_BUILD_TYPE=MinSizeRel

4. Finally, build and upload the example “blink” program (using micronucleus):

   cmake --build build -j -t upload-blink

   To compile the program without uploading, you can use

   cmake --build build -j -t blink

VSCode

Some stuff comes preconfigured.