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PPC, CodeWarrior

embOS for PowerPC was developed for and with Freescale CodeWarrior for MCU and supports all memory models offered by these compiler. It comes with easy to use project files. Initilization code for different PowerPC starter boards is included. 


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Resources and performance data

Memory usage
Kernel size (ROM) Approx. 1700 bytes
Kernel RAM usage 51 bytes
RAM usage per task control block 44 bytes
RAM usage per resource semaphore 16 bytes
RAM usage per counting semaphore 8 bytes
RAM usage per mailbox 24 bytes
RAM usage per software timer 20 bytes
RAM usage event 0 bytes
Min. stack-size per task (RAM) 90 bytes
Context switch time 3.3 µs
Interrupt latency time Max. 481 clock cycles (3.8 µs)
Kernel CPU usage/TICK Less than .2% of total calculation time at 1000 interrupts/second (1ms TICK)
Basic time unit (TICK) Typ. 1 ms, min. 20 µs (50 kHz interrupt frequency)
Max. no. of tasks Unlimited (by available RAM only)
Max. no. of mailboxes Unlimited (by available RAM only)
Max. no. of semaphores Unlimited (by available RAM only)
Max. no. of software timers Unlimited (by available RAM only)
Max. no. of priorities Unlimited
Stack size idle task (RAM) 0 (no memory needed)
Nested interrupts Permitted
Task switches from within ISR Possible

Absolute values given above were measured with embOS release build on an Freescale MPC5645S CPU running at 124MHz..

Board support packages

embOS comes with lots of ready to go start projects and support packages for various Cortex M CPUs and starterboards.

CPU Eval board  
Freescale MPC5645S Freescale MPC5645S_DEMO_V2