embOS for Fujitsu FR CPUs and Fujitsu Softune compiler

embOS for Fujitsu FR supports all CPUs with FR30 or FR50 core. It was developed for and with Fujitsu's Softune compiler Fcc911s and supports all memory models offered by this compiler. It comes with easy to use start workspace and project for Softune workbench. Software development with debugger and Softune simulator is supported.

Resources and performance data

Memory usage
Kernel size (ROM)	approx. 1700 bytes
Kernel RAM usage	46 bytes
RAM usage per task control block	32 bytes
RAM usage per resource semaphore	8 bytes
RAM usage per counting semaphore	2 bytes
RAM usage per mailbox	20 bytes
RAM usage per software timer	20 bytes
RAM usage event	0 bytes
Min. stack-size per task (RAM)	64 bytes
Timing
Context switch time	984 clock cycles (20.5 µs), independent of number of tasks
Interrupt latency time	Zero for high priority interrupts max. 444 clock cycles (9.25 µs) for low priority interrupts
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

Absolute timings given above were measured with embOS release build on an MB91362 CPU running at 48MHz.

embOSView offers system analysis during runtime

embOSView with Fujitsu FR CPU

Available Emulators

Fujitsu

Additional information

Release Notes embOS FR
Fujitsu Web site for additional CPU / Software information and support