Hii, i just stared my new project with freertos, i am using STM32F051 M0 controller. but i cant find any demo sample with FreeRtos not even on FreeRtos site. There is M3 demo codes for STM controller i just tried to port M3 To M0 but FreeRtos M3 Demo Application does not port to M3. for Development I want to use Keil not others. So how to Start with STMM0 with FreeRtos.

There is a demo for an ST Cortex-M0 part here: http://www.freertos.org/FreeRTOS-for-STM32F051-Cortex-M0-IAR.html It is using IAR. The latest release version of FreeRTOS does not have a Cortex-M0 port for Keil, but the latest head revision in SVN does – you can take the code out of SVN for now. It will be released soon. https://sourceforge.net/p/freertos/code/HEAD/tree/trunk/FreeRTOS/Source/portable/RVDS/ARM_CM0/ Regards.

hi Richard, thnx for this help. yes i use FreeRtos 7.5.2 version but it does not have CM0 for Keil so how do i do it i implement port.c ,portmacro.h also necessary files like task.c,queue.c,list.c and heap_2.c,after compilation i got following errors: Error: L6406E: No space in execution regions with .ANY selector matching heap_2.o(.bss). Error: L6407E: Sections of aggregate size 0x4400 bytes could not fit into .ANY selector(s).

yes i use FreeRtos 7.5.2 version but it does not have CM0 for Keil

The Keil port is in SVN – link in my first post.

Error: L6406E: No space in execution regions with .ANY selector matching heap_2.o(.bss).

This just looks like you have overflowed the amount of RAM in your project. Try lowering the value of configTOTALHEAPSIZE in FreeRTOSConfig.h, removing any heap defined by the project itself, and lowering the stack allocated to main() to about 400 (also defined in the project itself). Regards.