Additional constructor for rtos signal

include/sta/rtos/signal.hpp

@@ -25,6 +25,8 @@ namespace sta
 		 */
 		RtosSignal(osSemaphoreId_t semaphore);
 
+		RtosSignal(uint32_t max, uint32_t initial = 0);
+
 		/**
 		 * @brief Notify the signal.
 		 */