EventOS

An event based operating system for embedded systems (micro-controllers).

Usage:

• Dependencies:
  • GCC for ARM
  • Doxygen
  • Bash
  • (Under Windows I use cygwin with all the above goodies installed.)
• Use 'make' to compile the host application (blinky)
• Use 'make clean' to remove the previous build.
• Use 'make docs' to generate to the documentation (via doxygen)
• Use 'build.sh' to:
  • Run all of the unit tests
  • Copmile the host application (blinky)
  • Generate the documentation (via doxygen)

Notes:

• Not everything is working, though most things are working.
• Some of it is certainly broken.
• Docs are incomplete in explaining the idea/philosophy, this will be fixed "soon".
  • Cooperative (not preemptive).
  • Event driven (in case you didn't get that from the name).
  • Single application stack.
  • Not a RTOS, but good enough in some use cases.
  • Simpler and smaller than an RTOS.
  • Fits somewhere between a superloop and a RTOS.
• Docs are currently generated only for the public API.
• The current focus is on the public API, not the implementation (e.g. not optimized).
• The heap memory is used from the C-libs, this will be fixed "soon" (with an embedded appropriate memory allocator).
• Current focus is on the Cortex-M ARM
  • Portability across the entire Cortex-M family: M0, M0+, M1, M3, M4, M7 (goal).
  • No dependency on CMSIS or manufacturers headers files (sane portability) (goal).
  • Ports to other architectures (RISC-V) should be possible without changing the public API (goal).
• The OS in this project is hosted on the "BluePIll" board (STM32F103) because one was handy.
• More examples will be written "soon".
• 100% unit test coverage!
• If this works out the plan is to write/port middleware (net stacks, filesystems, etc.) to run on top of EventOS.
• MIT License.

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