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ISO 9001 certified


ARM7/9/XScale & Cortex-A/R, SEGGER Embedded Studio

embOS for ARM7/9/XScale & Cortex-A/R was developed for and with SEGGER Embedded Studio and supports all memory models offered by this compiler. It comes with easy to use start projects for SEGGER Embedded Studio. Initilization code for various ARM CPUs is included. Software development 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 71 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) 44 bytes
Timing
Context switch time 0.6 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 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 XRelease build on an Renesas RZ CPU running at 400MHz.

Board support packages

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

CPU Eval board
Atmel AT91SAM7S256 Atmel AT91SAM7S256-EK
Atmel AT91SAM9263 Atmel AT91SAM9263-EK
Renesas R7S72100 Renesas RSKRZA1