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This README provides a quick overview of QP for Arduino. Please refer to the companion webiste to this project at:

Software Installation

The QP adaptation for Arduino is distributed in a single ZIP archive qp-<ver>, where <ver> stands for the version of the QP frameworks.

You need to unzip the qp-<ver> archive into your Arduino <Sketchbook> folder. To find out where your <Sketchbook> folder is, or to configure a different location for your <Sketchbook> folder, you need to open the Arduino IDE and select File|Preferences menu. The Sketchbook location will be shown at the top of the Preferences dialog box. Once you identify the <Sketchbook> folder, you simply unzip the whole qp-<ver> archive to this folder.

Provided Libraries and Examples

The archive qp-<ver> contains two external libraries for SAM-based Arduinos:

  • qpcpp_sam -- QP/C++ framework for SAM-based Arduinos
  • qpn_avr -- QP-nano framework for AVR-based Arduinos

NOTE: qpn_avr is now obsolete. It is provided for backgwards compatibility only!

Provided Tools

The archive also contains the QM modeling tool for Windows

  • qm -- QM modeling tool for Windows 32/64-bit

Directories and Files

After the installation, your Arduino <Sketchbook> folder should look as follows:

<Sketchbook>/             - your Arduino Sketchbook folder
 +-libraries/             - libraries folder
 | +-qpcpp_sam/           - QP/C++ library for SAM-based Arduinos
 | | +-examples/          - QP/C++ library examples
 | | | +-blinky/          - Blinky example
 | | | | +-blinky.ino     - Blinky code (generated)
 | | | | +-blinky.qm      - Blinky model (for QM tool)
 | | | +-blinky2/         - Blinky2 example for blinking two LEDs
 | | | | +-blinky2.ino    - Blinky2 code (generated)
 | | | | +-blinky2.qm     - Blinky2 model (for QM tool)
 | | | +-blinky_bsp/      - Blinky example with Board Support Package
 | | | | +-blinky_bsp.ino - Blinky code (generated)
 | | | | +-blinky_bsp.qm  - Blinky model (for QM tool)
 | | | +-dpp_bsp/         - Dining Philosopher example with BSP
 | | | | +-dpp_bsp.ino    - DPP code (generated)
 | | | | +-dpp_bsp.qm     - DPP model (for QM tool)
 | | +-src/               - QP/C++ library source code
 | | | +-qpcpp.h          - QP/C++ library header file
 | | | +-...              - QP/C++ library sources
 | | - QP/C++ library properties
 | |
 +-libraries/             - libraries folder
 | +-qpn_avr/             - QP-nano library for AVR-based Arduinos
 | | +-...                  (now obsolete, for backgwards compatibility only) 
 | |
 | +-qm/                  - QM modeling tool (for Windows, Linux, or macOS)
 | | +-bin/               - QM binaries (executable and DLLs)
 | | | +-qm.exe           - QM executable (for Windows)
 | | +-Resources/         - QM resources
 | | | +-...
 |              - this file
 +-QP-Arduino_GPL_Exception.txt - GPL exception for QP on Arduino

NOTE: The QP-Arduino archive contains QM for the platform of your choice (Windows, Linux or macOS), but this requires downloading the corresponding version of the QP-Arduino integration.

Working with the Examples

Assumming that you have installed the QP library in your <Sketchbook> folder, the examples provided in each QP library show up in the Arduino IDE under the menu:

File|Examples|Examples from Custom Libraries

The intended way of working with the examples is to use the QM modeling tool to modify the models (.qm files) and then to generate code from these models. In this scenario, the Arduino IDE is used only to build and upload the code to the Arduino board(s).

NOTE: The preferences in the Arduino IDE should be set up to Use external editor so that the IDE will update the code each time it is re-generated by the QM modeling tool.

Example Documentation

Each example model has documentation, which you can view in the QM tool. The model documentation shows in the Property Editor when the model item is active.


The QP/C++ real-time embedded framework (RTEF) for Arduino are licensed under the modified GPLv3 license with the QP-Arduino Exception (see also the file QP-Arduino_GPL_Exception.txt in the root of the archive). Specifically, the Exception removes the requirement to expose your propriatory source code as long as you deploy it on an Arduino-Certified board.

The QM model-based design tool is freeware. The QM tool is provided under the terms of a simple End-User License Agreement (EULA).

Companion Web Page

Please refer to the companion web page to this project at:

Support Questions

Please submit any questions or comments to the free QP support forum at: