emWin upgrade     Trade-In program     Web shop
Flag icon Head office Germany
Flag icon US office

ISO 9001 certified

Cortex-M, GCC / emIDE

embOS for Cortex M was developed for and with emIDE 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.


Pricing Trial download Notification Subscribe to embOS software notification Release Notes


Resources and performance data

Memory usage
Kernel size (ROM) Approx. 1700 bytes
Kernel RAM usage 71 bytes
RAM usage per task control block 36 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) 80 bytes
Context switch time 2.2 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 STM32F407 CPU running at 168MHz..


Additional information

emIDE website for additional compiler info / support

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  
Freescale Kinetis K66 Segger emPower eval board  
Freescale K70FN1M0 Freescale TWR-K70FN1M  
NXP LPC1766 IAR LPC1766-SK  
NXP LPC1768 Keil MCB1700  
NXP LPC1788 Embedded Artists LPC1788-32  
NXP LPC1788 IAR LPC178x-SK  
NXP LPC1788 Future Designs uEZGUI-1788-43WQS  
NXP LPC4350 Arrow LPC-4350-DB1  
NXP LPC4357 Keil MCB4357  
ST STM32F051R8 IAR STM32F051R8-SK  
ST STM32F103 ST STM3210E-Eval  
ST STM32F107 ST STM3210C-Eval  
ST STM32F207 IAR STM32F207-SK  
ST STM32F207 ST STM3220G-Eval  
ST STM32F303 ST STM32F303C-Eval  
ST STM32F407VG ST STM32F4 Discovery  
ST STM32F407VG ST STM32F40G-Eval  
ST STM32F429 ST STM32F429 Discovery  
ST STM32F429 IAR STM32F429-SK  
ST STM32L152VB ST STM32L152-Eval  
TI Tiva TM4C129 TI TM4C129 Development Board