RTEMS (Real-Time Executive for Multiprocessor Systems) is a real-time operating system kernel used around the world and in space. RTEMS is a free real-time operating system (RTOS) designed for deeply embedded systems such as automobile electronics, robotic controllers, and on-board satellite instruments (1,2).

This example is the result of a study of this OS. I was interested in learning how to build an image and create applications for it. At the moment, this project is used as a base for creating embedded controller applications based on x86 CPU and ARM-microcontrollers LPC1768 .

Perhaps this work will be interesting to someone and you will use this knowledge to create your own systems.

Make some preparations once before start the building process:

git clone https://github.com/maxpoliak/rtems-ec-cli.git && cd rtems-ec-cli && ./preparations.sh

Use the help to print all the available options:

./build.sh help

Use ./build.sh [OPTIONS...]
Use $0 [OPTIONS...]"
  -a | all       Build all: cross-compiler, RTEMS OS and ile-cli application
       rtems     Build RTEMS OS
       cross     Build cross-compiler
  -C | cleanall  Clear all
  -r | rebuild   Set rebuild flag
                 Delete the application's object files before building it
  -h | help      Print help

For the first build, use the build script with the "-a" or "all" option to build all components of the project. As a result, you will build a cross compiler, RTEMS OS and the ile-cli application itself.

./build.sh all

Build the application only, without rebuilding tools and RTEMS OS:

./build.sh

The Waf build system (3,4) is used for the output executable file of the application.

Use the docker.sh scripts to run in the docker container.

./docker.sh ./build.sh all

Test the result in QEMU using the script:

./run.sh