CMake AVR Toolchain

A toolchain file for working with avr-gcc.

Usage

Requirements

• AVR toolchain installed on your system (If not in one of the default search paths, specify $AVR_ROOT)

Copy avr-gcc.toolchain.cmake into your project (or you could use this repo as a submodule). Then set CMAKE_TOOLCHAIN_FILE. This can be done from your project's CMakeLists.txt file or at the commandline.

The following is an example CMakeLists.txt for an atmega2560 project (Arduino Mega).

cmake_minimum_required(VERSION 3.0)

set(CMAKE_TOOLCHAIN_FILE "/path/to/avr-gcc.toolchain.cmake")

project(myproject C CXX ASM)

include_directories(
    include/
)

add_definitions(-DF_CPU=16000000)

add_avr_libraries(${PROJECT_NAME} "atmega2560" 
    ${CMAKE_SOURCE_DIR}/bin/lib.a
    ${CMAKE_SOURCE_DIR}/bin/obj.o
)

add_avr_executable(${PROJECT_NAME} "atmega2560"
    src/main.cpp
)

cmake
# or the following if you want to specify the toolchain file at the command line
cmake -DCMAKE_TOOLCHAIN_FILE=/path/to/avr-gcc.toolchain.cmake

Flash

avrdude -v -patmega2560 -cwiring -PCOM6 -b115200 -D -Uflash:w:myproject-atmega2560.hex

Libraries

Optional libraries and precompiled objects can be included through the add_avr_libraries macro, which is similar to the add_avr_executable macro

...

add_avr_libraries("${PROJECT_NAME} "atmega2560" 
    ${CMAKE_SOURCE_DIR}/bin/lib.a
    ${CMAKE_SOURCE_DIR}/bin/obj.o
)