avr-toolchain

This will download and unzip the avr-gcc to a toolchain directory (install.bat) and provide a CMake file with the parameters.

Install

You should have installed git and cmake. Nothing else needs to be installed for this toolchain.

Install Toolchain

Add the git repos as submodule

git submodule add https://github.com/Tropby/avr-toolchain.git dep/avr-toolchain

Change to the submodule directory

cd dep/avr-toolchain/

Run the install batch file

./install.bat

Install CMake for AVR

Add the git repos as submodule

git submodule add https://github.com/mkleemann/cmake-avr.git dep/cmake-avr

In your project

Include the cmake file in your CMakeLists.txt

# 
include("dep/avr-toolchain/avr-toolchain.cmake")

# Configuration
include("config.cmake")

# Include AVR GCC 
include("dep/cmake-avr/generic-gcc-avr.cmake")
set(AVR_SIZE_ARGS)

add_avr_executable(${PROJECT_NAME} ${SRC_FILES} ${AVR_LIBS})

Create a config.cmake file with the following content and change the parameter to fit your AVR cpu

cmake_minimum_required(VERSION 3.0.0)

set(CMAKE_SYSTEM_NAME   Linux           )
set(AVR_OPTIMISATION    s               )

set(AVR_MCU             atmega328p      )
set(AVR_FREQUENCY       16000000UL      )
set(AVR_BAUD            57600           )

set(AVR_UPLOADTOOL      avrdude         )
set(AVR_PROGRAMMER      avrispmkii      )
set(AVR_MCU_AVRDUDE     m328p           )

Setup include directories in c_cpp_properties.json

"includePath": [
  "${workspaceFolder}/dep/avr-toolchain/toolchain/avr/include/**"
 ]

"browse": {
    "path": [
        "${workspaceFolder}/dep/avr-toolchain/toolchain/avr/include",
    ]
}

Set defines to fit your CPU and Baud for VSCode IntelliSense in c_cpp_properties.json

"defines": [
    "__AVR_ATmega328P__",
    "BAUD=9600"
]