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);