SH2A, HEW GNU
embOS for SH2A was developed for and with KPIT GNU compiler.
It comes with a start project for the RENESAS RSK7203 eval kit and supports CPUs with or without floating point unit.
|Pricing||Trial download||Subscribe to embOS software notification||Release Notes|
Resources and performance data
|Kernel size (ROM)||Approx. 2.4 Kbytes|
|Kernel RAM usage||49 bytes|
|RAM usage per task control block||32 bytes|
|RAM usage per resource semaphore||16 bytes|
|RAM usage per counting semaphore||8 bytes|
|RAM usage per mailbox||24 bytes|
|RAM usage per software timer||20 bytes|
|RAM usage event||0 bytes|
|Min. stack-size per task (RAM)||Approx. 70/160 bytes (without/with FPU)|
|Context switch time||Less than 1.7us|
|Interrupt latency time||0|
|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. 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||Unlimited|
|Stack size idle task (RAM)||0 (no memory needed)|
|Task switches from within ISR||Possible|
Absolute values given above were measured with embOS release build on an SH2 CPU running at 200 MHz.
Board support packages
embOS comes with lots of ready to go start projects and support packages for various SH2 CPUs and starterboards.
|Renesas SH7203||Renesas SH7203 evalboard|