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ISO 9001 certified

C16x, Tasking

embOS for C166/C167 was developed for and with the the TASKING EDE v2.7r5 and the TASKING C166 C compiler v7.5r5. It supports the small, medium and large memory models of the TASKING Tools (if required, please contact us for tiny memory model support) and comes with an easy to use sample start application.

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Resources and performance data

Memory usage
Kernel size (ROM) Approx. 1400 bytes
Kernel RAM usage TBD
RAM usage per task control block 18 bytes
RAM usage per resource semaphore 4 bytes
RAM usage per counting semaphore 2 bytes
RAM usage per mailbox 12 bytes
RAM usage per software timer 10 bytes
RAM usage event 0 bytes
Min. stack-size per task (RAM) TBD
Context switch time 101.2 µs, independent of number of tasks
Interrupt latency time 42.4 µs
Kernel CPU usage/TICK Less than .5% 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 (resource/binary/counting) Unlimited (by available RAM only)
Max. no. of software timers Unlimited (by available RAM only)
Max. no. of priorities 255
Stack size idle task (RAM) 0 (no memory needed)
Nested interrupts Permitted
Task switches from within ISR Possible

Absolute values given above were measured using the small memory model in an embOS Release build on an C167 CPU running at 20MHz.