cmake-avr

Overview

CMake toolchain for AVR microcontroller

Requirements

• CMake >= 3.23 (to use presets. If you use this without presets, CMake >= 3.12 is acceptable.)
• AVR compiler (see section Appendix: How to install a compiler.)

Usage

1. Clone this repository.

   git clone https://github.com/Enchan1207/cmake-avr

2. Set environment variable AVR_SDK_PATH to it.

   export AVR_SDK_PATH='/path/to/cmake-avr'

3. Configure CMakePresets.json .

   {
       "version": 10,
       "cmakeMinimumRequired": {
           "major": 3,
           "minor": 12,
           "patch": 0
       },
       "configurePresets": [
           {
               "name": "target",
               "generator": "Ninja",
               "binaryDir": "${sourceDir}/build/${presetName}",
               "cacheVariables": {
                   "AVR_MCU": "attiny85",
                   "AVR_FCPU": "8000000"
               },
               "toolchainFile": "$env{AVR_SDK_PATH}/cmake/avr_toolchain.cmake"
           }
       ],
       "buildPresets": [
           {
               "name": "target",
               "configurePreset": "target"
           }
       ]
   }

4. (optional) Add target_configure_for_avr for your target in CMakeLists.txt. it provides memory-usage and .hex file output to specified target.

   add_executable(main_target)
   
   # some configuration...
   
   target_configure_for_avr(main_target)

Configuration options

This toolchain provides options: AVR_MCU and AVR_FCPU. It will be passed to commands and can be set at configure (cmake ...) or at CMakePresets.json.

Appendix: How to install a compiler

AVR compilers can be installed from microchip or HomeBrew.

License

This repository is published under MIT License.