embOS for Coldfire and Metroworks Codewarrior

embOS for Coldfire was developed for and with Metroworks Codewarrior version 6.3 and supports all memory models offered by this compiler. It comes with easy to use start projects for Metroworks Codewarrior workbench.

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
Timing
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)
Features
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

embOSView offers system analysis during runtime

Target CPU specific information

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

PCF52223CAF80/ M52223EVB
PCF52233CAF60/M52233DEMO
PCF52223CAF80/ MCF52223-SK

Available Emulators

J-Link for Coldfire
Multilink (P&E Micro)

Additional information

Release Notes embOS Coldfire and Metroworks compiler
Freescale Web site for additional cpu info / support