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ISO 9001 certified

ColdFire, CodeWarrior

embOS for ColdFire was developed for and with Metrowerks CodeWarrior version 7.0 and supports all memory models and calling conventions offered by this compiler. It comes with easy to use start projects for the Metrowerks CodeWarrior workbench.


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Resources and performance data

Memory usage
Kernel size (ROM) Approx. 1200 bytes
Kernel RAM usage 38 bytes
RAM usage per task control block 30 bytes
RAM usage per resource semaphore 14 bytes
RAM usage per counting semaphore 8 bytes
RAM usage per mailbox 22 bytes
RAM usage per software timer 18 bytes
RAM usage event 6 bytes
Min. stack-size per task (RAM) 72 bytes
Context switch time Approx. 4.95 µs
Interrupt latency time Zero
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


Board support packages

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

CPU Eval board
Freescale PCF52223CAF80 Freescale M52223EVB
Freescale PCF52233CAF60 Axiom M52233DEMO
Freescale PCF5329 Logic-PD M5329
Freescale PCF52223CAF80 IAR M52233-SK