embOS for NEC 78K0 / K0S / K0R series was developed for and with IAR's compiler. For K0 / K0S CPU, the small memory model ist supported.
For K0R CPUs, all combinations of code / data model are supported. embOS for K0 comes with with easy to use start projects for IAR's embedded workbench. Software development with NEC debugger or simulator is supported.
|Pricing||Trial download||Subscribe to embOS software notification||Release Notes|
Resources and performance data
|Kernel size (ROM)||1400 bytes|
|Kernel RAM usage||31 bytes|
|RAM usage per task control block||12 bytes|
|RAM usage per resource semaphore||8 bytes|
|RAM usage per counting semaphore||4 bytes|
|RAM usage per mailbox||12 bytes|
|RAM usage per software timer||10 bytes|
|RAM usage event||0 bytes|
|Min. stack-size per task (RAM)||120 bytes|
|Context switch time||10.3 µs, independent of number of tasks|
|Interrupt latency time||TBD|
|Kernel CPU usage/TICK||Less than 1% of total calculation time at 1000 interrupts/second (1ms TICK)|
|Basic time unit (TICK)||Typ. 1 ms, min. 100 µs (10 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 XRelease build on an 78K0R CPU running at 20MHz.
Board support packages
embOS comes with lots of ready to go start projects and support packages for various CPUs and starterboards.
|Renesas K0 78F0066||NEC 78K0 Test It!|
|Renesas K0 78F0148||NEC 78K0 Play It!|
|Renesas K0R 78F1166||NECs 78K0R Cool it!|