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ISO 9001 certified

Cortex-M, Atmel Studio

embOS for Cortex M was developed for and with Atmel Studio and supports all memory models offered by these compiler. It comes with easy to use make files. Initilization code for different Cortex M starter boards is included. Software development with with JTAG tools like J-Link is possible.


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Resources and performance data

Memory usage
Kernel size (ROM) Approx. 1700 bytes
Kernel RAM usage 51 bytes
RAM usage per task control block 28 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) 72 bytes
Context switch time 1.1 µs
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 XRelease build on an Atmel ATSAMV71 CPU running at 300MHz.

Board support packages

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

CPU Eval board
Atmel ATSAM3X Atmel SAM3X-EK
Atmel ATSAM4S Atmel SAM4S-EK2
Atmel SAMD20J18 Atmel SAMD20 X-Plained Pro
Atmel SAMV71 Atmel SAMV7 XPlainedUltra