cmake-avr

Overview

CMake toolchain for AVR microcontroller

Usage

You can use this toolchain by some ways:

1. Configure project only for AVR (always use toolchain when build project)
2. Configure project for cross-platform software (use toolchain only if build for AVR)

Before you use...

This repository depends on arduino-cli, and need to install arduino:avr core before you use it:

arduino-cli core install arduino:avr

1. Always use toolchain when build project

If you always want to use AVR toolchain, please insert following lines into CMakeLists.txt.

NOTE: Please insert them before project() statement!

# fetch and enable AVR toolchain
include(FetchContent)
FetchContent_Declare(
    avr_toolchain
    GIT_REPOSITORY https://github.com/Enchan1207/cmake-avr
    GIT_TAG v0.2.0
)
FetchContent_Populate(avr_toolchain)
set(CMAKE_TOOLCHAIN_FILE "${avr_toolchain_SOURCE_DIR}/cmake/avr_toolchain.cmake")

2. Use toolchain only if build for AVR

If your project is developed as cross-platform software, add --toolchain= options to cmake when configure.

cmake .. --toolchain=/path/to/avr_toolchain.cmake

It can be able to build your project for AVR without making any changes to CMakeLists.txt.

Custom macros

This toolchain provides custom macros named target_configure_for_avr(). It can use like this:

add_executable(main)
target_sources(main PRIVATE
    main.cpp
)

# If your project is not only for AVR,
# please check if BUILD_FOR_AVR is defined and its value is `true`
if(${BUILD_FOR_AVR})
    target_configure_for_avr(main)
endif()

This macro adds the following custom targets and commands to your target:

• Flash target:
  Custom target named flash-{target_name} for flashing. If you execute this target, built programms will be flashed to microcontroller by avrdude.
• Memory usage confirmation:
  After the target has finished building, the memory usage calculated by avr-objdump is displayed to console.

Variables

You can specify some options to cmake-avr. These can be checked and edited using ccmake, cmake-gui or command-line options.

• Environmental options:
  • ARDUINOCLI_ROOT : Root path of arduino-cli. If you installed arduino-cli to custom directory, you need to set this.
• Compiler options:
  • AVR_MCU : The identifier of target microcontroller. atmega328p is used by default.
  • AVR_FCPU : The clock frequency of target microcontroller. 16000000 is used by default.
• Programmer options:
  • AVRDUDE_PORT : Port to which the programmer is connected. *NIX might be /dev/the_name_of_device, Windows might be COM#.
  • AVRDUDE_BAUDRATE : The communication baudrate between PC and programmer, 19200 is used by default.
  • AVRDUDE_PROGRAMMER : The identifier of programmer. avrisp is used by default.

Arduino supports

Sorry, currently this toolchain not supports Arduino headers, libraries or programms(.ino).

License

This repository is published under MIT License.