embOS for RENESAS M32C & M16C80 CPUs and IAR compiler

embOS for RENESAS M32C was developed for and with IAR's compiler and supports all memory models offered by this compiler.
embOS for M32C comes with easy to use start projects for M32C and M16C80 CPUs which may be used with IAR's embedded workbench. Software development with PD308 debugger, KD308(3) ROM-Monitor, CSpy ROM monitor driver and CSpy simulator is supported.

Resources and performance data

Memory usage
Kernel size (ROM)	1587 bytes
Kernel RAM usage	37 bytes
RAM usage per task control block	28 bytes
RAM usage per resource semaphore	6 bytes
RAM usage per counting semaphore	2 bytes
RAM usage per mailbox	18 bytes
RAM usage per software timer	14 bytes
RAM usage event	0 bytes
Min. stack-size per task (RAM)	64 bytes
Timing
Context switch time	289 clock cycles (9.6 µs), independent of number of tasks
Interrupt latency time	max. 130 clock cycles (4.3 µs)
Kernel CPU usage/TICK	less than .3% of total calculation time at 1000 Interrupts/second (1ms TICK)
Basic time unit (TICK)	typ. 1 ms, min. 10 µs (100 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 data given above were measured with embOS release build on an M30853 CPU running at 30MHz in HUGE memory model.

embOSView offers system analysis during runtime

embOSView with Renesas M30803 CPU

Available Emulators

RENESAS
HP

Additional information

Release Notes embOS M32C for IAR M32C compiler
IAR Web site for additional compiler info / support
RENESAS Web site for additional CPU info / support

Copyright 2001-2005 SEGGER Microcontroller GmbH & Co.KG. All rights reserved.
For more information, please visit our web site www.segger.com or contact us at info@segger.com
Last update: December 7, 2007