Semaphores are typically used for both synchronization and mutual exclusion in access to resources. Semaphore example #include "semphr.h" //Create semphore SemaphoreHandle_t SemaphoreHandle1 = NULL; SemaphoreHandle1 = xSemaphoreCreateMutex(); //Use sempahore xSemaphoreTake(SemaphoreHandle1, portMAX_DELAY); //Do something… xSemaphoreGive(SemaphoreHandle1);