Car-OS

The Car here stands for Classic autosar. This runs on top of Car-OS.Zephyr project. Refer Car-OS.Zephyr for more details. This work is a fork from NammaAUTOSAR. To know more about the history of it, please have a look.

If you invoke python car-os/tools/autosar-gui.py from terminal and you get the GUI as shown below. And this is referred as Car-OS Builder.

This project is created this way for following reasons:

• Zephyr OS supports variety of boards and therefore this project can easily support any hardware with little effort.
• And, MCAL will use Zephyr RTOS's standard interfaces. So, no business of updating MCALs ($$ savings) across micros, henceforth.
• People working on this project can focus on new ideas or on AUTOSAR specs than re-doing what Zephyr OS team had done it.
• Linux Foundation is making effort to get Safety (SIL3) certification. So this work could/will be used on Cars one day.

Getting Started

Prerequisites - Windows

• Windows 10 + MSYS2
  • Follow the instructions given in "Installation" section in https://www.msys2.org/
  • Install following packages by starting the MSYS2 MSYS terminal:
    • pacman -Suy
    • pacman -S mingw-w64-x86_64-python mingw-w64-x86_64-tk mingw-w64-x86_64-python-pip
    • pip install colorama
    • pacman -S mingw-w64-x86_64-arm-none-eabi-gcc mingw-w64-x86_64-qemu
  • Install the following package for Gtk and Glade
  • pacman -S mingw-w64-x86_64-python-gobject mingw-w64-x86_64-gtk3
  • Create envirnomental variable with VARIABLE NAME as MINGW_ROOT and VARIABLE VALUE as installation path (e.g., C:\msys64\mingw64)

Prerequisites - Linux:

• Ubuntu 20.04 OS (either on Linux or on WSL2 inside Windows)
  • Install following packages inside Ubuntu
    • apt install gcc-arm-none-eabi qemu-system-arm gdb-multiarch python3

Getting / Pulling the latest changes

• Do the following to get the latest changes from the main and submodules
  • git pull
  • git submodule update --recursive --remote
• After this, do not forget to pull the applications (apps are loosely coupled) manually as below
  • cd submodules/AL/Car_Os_TestApp
  • git pull

If all steps above are successfull you are now ready to continue your contribution.

Cloning the Repo - Fresh Start

As Car-OS.Zephyr uses git submodules, please use the following command to clone the main and submodules

• git clone --recurse-submodules -j4 https://github.com/aananthcn/Car-OS.Zephyr.git

Starting the Car-OS.Zephyr GUI

• To start the Car-OS.Zephyr Builder GUI, first open the MSYS2 MINGW64 terminal
• Navigate to the cloned repository
• Run this command in the MSYS2 MINGW64 terminal: python tools/autosar-gui.py
• Car-OS.Zephyr Builder GUI will open

Importing ARXML

• To import ARXML, go to File --> Import ARXML File. It will give 3 different ARXML like below

• NOTE: It is advised to go with RaspberryPi-Pico.arxml for now, as it is tested and working well
• Select RaspberryPi-Pico.arxml and click on Open. AUTOSAR Layered Architecture view will open
• NOTE: Since this project in initial phase, only few modules are presented in the layered view

Configuration

• Click on the any AUTOSAR module (i.e., colored rectangle boxes; e.g., Spi), another window will open for configuration of various parameters
• Once all the configuration is done, the click on Save Config to update the changes and close the module specific window
• Repeat the steps for all the necessary modules

Importing Car_Os_TestApp

• Click on Applications (1) and wait for the clone operation to complete.
• Mention how many number of applications you want to import. In this case, I have given as 1
• Provide the Car_Os_TestApp repository path in the App 0 - https://github.com/aananthcn/Car_Os_TestApp.git

• This will automatically import the Car_Os_TestApp into respective folder

Code Generation

• Once all the configuration is done, click on the Generate --> Generate Source
• If all the changes are proper, then a popup with this message will be shown Code Generated Successfully!

• Close the Car-OS.Zephyr Builder GUI

Generate the ELF File

• In the MSYS2 MINGW64 terminal, type make
• This process will take sometime as it needs to compile all the source files and link them to generate the ELF file

Test it on Real Hardware

• If you have real hardware Raspberry Pi Pico, then flash the generated *.elf file and test it