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ISO 9001 certified

ARM7/9/XScale & Cortex-A/R, Atollic

embOS for ARM7/9/XScale & Cortex-A/R was developed for and with Atollic's compiler  and supports all memory models offered by this compiler. It comes with easy to use start projects for Atollic TrueSTUDIO for ARM. Initilization code for various ARM CPUs is included. Software development with GDB server with JTAG tools like J-Link is possible.


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Resources and performance data

Memory usage
Kernel size (ROM) Approx. 1500 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
Context switch time Max. 8 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)
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)
Nested interrupts Permitted
Task switches from within ISR Possible

Absolute values given above were measured with embOS release build on an LH79531 CPU running at 48MHz.

Board support packages

embOS comes with lots of ready to go start projects and support packages for various ARM7/9 CPUs and starterboards.

CPU Eval board
Atmel SAMA5D33 Atmel SAMA5D33-EK
Toshiba TMPA900 Toshiba BMSKTOPASA900(DCE)
Toshiba TMPA910 Toshiba BMSKTOPASA910(DCE)