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ABANDONED: Yet another way to build arduino projects with scons.

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ABANDONED PROJECT

This was good while it lasted, but keeping this up to date with changes to the Arduino distribution is not something that I want to put effort into.

PlatformIO seems to be the current best replacement for this project.


Arduino SCons (alternative)

An alternative way of building arduino sketches with SCons.

This project is designed to be:

  • Flexible. Code generation? Multiple builds for different boards uploaded to the correct ports from one script? No problem.
  • Easy to understand. No source munging. No automatic library detection. No magic.

Installation

This can either be installed system-wide, or per-project. Either way, arduino.py should be installed into $SITE_SCONS/site_tools, where $SITE_SCONS is one of the directories listed in the SCons man page under the --site-dir flag.

On Linux the following directories are appropriate:

  • /usr/share/scons/site_scons
  • $HOME/.scons/site_scons
  • ./site_scons

Installing into $HOME/.scons/site_scons can be accomplished by running ./install.sh.

Usage

This script does not do any munging of your source files, so you may need reorder your functions (or add function prototypes), and add #include <Arduino.h>. Your sketch should be in a .cpp file, rather than an .ino file.

A script to compile and upload a basic sketch might look something like this:

env = Environment(tools=["default", "arduino"])
env.ConfigureBoard("atmega328")
core = env.ArduinoCore()

sketch = env.Sketch("blink", ["blink.cpp", core])
env.Upload(sketch)

See the examples directory for more examples.

API

Installing the tool into an environment gives it the following methods:

env.ConfigureBoard(board_name)

This sets defaults for a whole bunch of environment variables (described below), based on the board name. The supported boards and their settings can be found in $ARDUINO_HOME/hardware/arduino/boards.txt.

env.ArduinoCore()

Compile the arduino core library into a static library.

env.ArduinoLibrary(name)

Compile a standard arduino library into a static library, and add it to the include path.

env.ArduinoLibrary(name, path)

Compile an arduino library in a given directory into a static library, and add it to the include path.

env.Sketch(name, sources)

Uses.env.Program and env.Hex to compile a list of sources (either source files or libraries) into a hex file (named name.hex) for uploading.

env.Upload(hex_file, name="upload")

Adds an alias (named upload by default) which uploads the given hex file to an arduino connected to $UPLOAD_PORT. Strange things happen if this is called multiple times with the same name; either add an alias which defers to multiple upload targets, or use env.UploadAll().

env.UploadAll(name="upload")

Add an alias which defers to all upload targets in $ALL_UPLOADS, which is updated by env.Upload.

Variables

ARDUINO_HOME

The root of the arduino install. By default this is taken from the environment variable of the same name; if this is not found, /usr/share/arduino is used.

BOARD

The name of the board passed to env.ConfigureBoard.

F_CPU

CPU frequency in Hz.

MCU

MCU string passed to gcc and avrdude.

VARIANT

Board variant.

VARIANT_DIR

Directory for the above variant.

CORE

Core name for this board; always "arduino".

CORE_DIR

Directory of the core library for this board.

BUILD_DIR

The directory to build in, by default build/$BOARD.

AVRDUDE

The avrdude binary to use.

AVRDUDEFLAGS

Flags to pass to avrdude.

AVRDUDECMD

The full avrdude command line.

UPLOAD_PROTOCOL

The upload protocol to use with avrdude.

UPLOAD_SPEED

Upload speed for this board.

UPLOAD_PORT

USB port to upload to, by default /dev/ttyUSB0.

Standard Variables

The following variables have their standard meanings, and are set by env.ConfigureBoard:

About

MIT licensed; see LICENSE.

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ABANDONED: Yet another way to build arduino projects with scons.

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