mAbassi SMP RTOS for Cortex-M3/M4

Multicore in than 5 kilobytes.

In addition to the standard features supported by all RTOS, the Abassi family has many features unmatched in the industry:


    1. Intelligent starvation protectionGuarantees fair access to CPU, via enhanced priority aging, even on heavily loaded systems.
    2. Priority inheritance, including dynamic trackingAutomatically adjusts for priority aging, timeouts, etc. and propagationBetween entangled mutex owners, to prevent deadlock.
    3. Adaptive priority ceilingTarget priority is self determined.
    4. Deadlock detectionReports recursive mutex dependencies anywhere in the execution chain.
    5. AsymmetricTimeslice adjustable at a per task level. Round Robin scheduling
    6. and more...

Demonstration Package

Download an evaluation version of the RTOS, including demonstrations for multiple evaluation platforms. Full support for the M3 processor in the OMAP4460.

Development Tool Choices

Abassi supports major ARM development tools, including Code Composer Studio.

Memory Requirements

Don't settle for half a RTOS! Even with all features enabled, Abassi still consumes less memory than the minimum configuration of most kernels. And you get advanced priority inheritance, asymmetric round-robin scheduling, starvation protection, and much more. Or, if memory footprint is paramount, Abassi scales to a minimum size that can't be matched.

"C" Code Memory Usage
Description Size
Minimal Build <1375 bytes
+ Runtime service creation / static memory <1675 bytes
+ Multiple tasks at same priority <2200 bytes
+ Runtime priority change
+ Mutex priority inheritance
+ FCFS
+ Task suspension		 <2950 bytes
+ Timer & timeout
+ Timer call back
+ Round robin		 <2925 bytes
+ Events
+ Mailbox		 <3575 bytes
Full Feature Build (no name / no runtime creation) <3800 bytes
Full Feature Build (no names) <4200 bytes
Assembly Code Memory Usage
Description Size
Assembly code size (>1 core) 724 bytes
Assembly code size (==1 core) 288 bytes
Vector table (per interrupt handler entry) +4 bytes
Hybrid Stack Enabled +24 bytes
Saturation Bit Enabled +24 bytes

For your exact data memory requirements, please consult the Porting Document that applies to your design environment.

Kernel Snapshot

  1. Symmetric Multiprocessing
  2. Single core configurable
  3. Fully preemptive
  4. Scalable
  5. Very small code and data footprint
  6. Code can reside in ROM
  7. Zero interrupt latency kernel
  8. Mutexes
    1. Configurable priority inheritance
    2. Adaptive priority ceiling
    3. Priority based and first-come, first-served
  9. Versatile semaphores
    1. Counting and binary
    2. Priority based and first-come, first-served
  10. Mailboxes
    1. Priority based and first-come, first-served
  11. Events
  12. Intelligent starvation protection
  13. Hybrid interrupt stack
  14. Deadlock detection
  15. Configurable Round Robin
  16. Dynamic priority changes
  17. Compile time task and component creation
  18. Run-time safe service creation
  19. No fixed number of tasks or components
  20. Programmable timeout on components
  21. Selectable scheduling search algorithm
  22. Debug logging