The dnx RTOS is a general purpose operating system based on the FreeRTOS kernel. The dnx layer is modeled on well-known Unix architecture. A destination of the system are small microcontrollers supported by the FreeRTOS kernel, especially 32-bit. The system is easy scalable to the user's needs, the user can write own drivers, virtual devices, programs and so on. The program layer is mostly compatible with the C standard. You can say that the dnx RTOS is a FreeRTOS kernel distribution.

There are minimal hardware requirements that allows to start system but with very minimalistic software base:

• 64 KiB Flash memory,
• 16 KiB RAM memory (recommended 20 KiB).

The hardware requirements depends on the user's configuration.

• user's terminal (via UART interface in example configuration),
• possibility to run many copies of the same program,
• simple porting of PC programs for the dnx (due to the C standard compatibility)
• simple Drivers Layer,
• support many file systems (the VFS Layer),
• interrupts are not masked by the system (the RTOS feature),
• dynamic memory allocation (simple garbage collector for programs),
• supports many CPU architectures (the FreeRTOS feature),
• modular design.

To configure the project, type in the terminal:

make config

or

./configure

To compile the project, type in the terminal:

make

• BSP - board support packages (configurations)
• build - the project's binaries (created after compilation)
• config - the project's configuration
• doc - documentation
• res - resources included at project build
• src - the project's sources
• tools - the project's tools (scripts, wizard, etc)

The whole documenation and exmaples you can found at dnx RTOS official website.

There is also additional software repository with applications.