embOS for Renesas M16C60 / M16C20 CPUs and NC30 compiler version 3

embOS for Renesas M16C6x / M16C20 was developed for and with Renesas's NC30 compiler and supports all memory models offered by this compiler. It comes with easy to use start projects for Renesas's tool manager version 2. Software development with PD30 emulator, simulator and KD30 ROM-Monitor is supported.
The current distribution of embOS M16C for NC30 compiler also contains a complete version for NC30 compiler V4 and toolmanager V3.

Resources and performance data

Memory usage
Kernel size (ROM)	1338 bytes
Kernel RAM usage	25 bytes
RAM usage per task control block	19 bytes
RAM usage per resource semaphore	4 bytes
RAM usage per counting semaphore	2 bytes
RAM usage per mailbox	11 bytes
RAM usage per software timer	11 bytes
RAM usage event	0 bytes
Min. stack-size per task (RAM)	40 bytes
Timing
Context switch time	330 clock cycles (20.6 µs), independent of number of tasks
Interrupt latency time	max. 131 clock cycles (8.2 µs)
Kernel CPU usage/TICK	less than .4% 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

Absolute timings given above were measured with embOS release build on an M30624 CPU running at 16MHz in NEAR memory model.

embOSView offers system analysis during runtime

embOSView with Renesas M30624 CPU

Available Emulators

Renesas
HP

Additional information

Release Notes embOS M16C for NC30 compiler V3
embOS M16C for NC30 compiler V4
Renesas Web site for additional CPU and compiler info / support