Hi, firstly sorry all for posting so many questions but I'm complete novice!!!

I'trying to use the example aboute "mutexes" but the commpiler return:

undefined reference to xSemaphoreCreateMutex; I include the headres file : semphr.h and queue.h.

The example posted on web page is: http://www.freertos.org/a00122.html

Thanks for all!!!!

Have you set configUSE_MUTEXES to 1 in FreeRTOSConfig.h? You might need to add the definition in, if it is omitted it will get defaulted to 0.

Regards.

Thank you for yuor support. Actually my config file didn't even have this line. I added it but it's still returnig that error.

Thank's again!!!