embOS for RENESAS H8/H8S series was developed for and with IAR's compiler and supports H8/H8S CPUs with all memory models offered by this compiler.
It comes with easy to use start projects for IAR's embedded workbench. Software development with CSpy simulator debugger is supported.
|Pricing||Trial download||Subscribe to embOS software notification||Release Notes|
Resources and performance data
|Kernel size (ROM)||1582 bytes|
|Kernel RAM usage||34 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||14 bytes|
|RAM usage per software timer||14 bytes|
|RAM usage event||0 bytes|
|Min. stack-size per task (RAM)||42 bytes|
|Context switch time||658 clock cycles (29.9 µs), independent of number of tasks|
|Interrupt latency time (Fast interrupt)||Max. 74 clock cycles (3.3 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)|
|Max. no. of tasks||Unlimited (by available RAM only)|
|Max. no. of mailboxes||Unlimited (by available RAM only)|
|Max. no. of semaphores||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)|
|Task switches from within ISR||Possible|
Absolute timings given above were measured with embOS release build on an H83069 CPU running at 22 MHz in LARGE memory model.
Board support packages
embOS comes with lots of ready to go start projects and support packages for various CPUs and starterboards.
|Renesas H83069||Renesas H83069 evalboard|
|Renesas H8S2239||Renesas H8S2239 evalboard|