embOS for ARM7 / ARM9 CPUs and ARM RVDS 3.0

embOS for ARM7/ARM9 devices was developed for and with ARM RVDS 3.0.
It comes with easy to use start projects and embOSView.
Debugging with J-Link is supported.

Resources and performance data

Memory usage
Kernel size (ROM)	approx. 2000 bytes
Kernel RAM usage	51 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)	56 bytes
Timing
Context switch time	max. 7.2 µs, independent of number of tasks
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 ARM CPUs and starterboards.

ATMEL AT91M40xxx devices supported by embOS ARM RVDS
ATMEL AT91SAM7A3 devices supported by embOS ARM RVDS
ATMEL AT91SAM7S devices supported by embOS ARM RVDS
ST STR7xx devices supported by embOS ARM RVDS

Available Emulators

J-Link ARM
Real View ICE USB (ARM)

Additional information

Release Notes embOS ARM for RVDS