Implemented peeking with and without data for interrupt and blocking mode

hardware.hpp

@@ -73,6 +73,15 @@ class Hardware {
 		*Registers::IO_REG = byte;
 	}
 
+	static bool peekBlocking() FORCE_INLINE
+	{
+		if (*Registers::CTRL_STAT_REG_A & (1 << CtrlFlagsA::RECEIVE_COMPLETE)) {
+			return true;
+		}
+
+		return false;
+	}
+
 	static void enableDataRegEmptyInt() FORCE_INLINE
 	{
 		*Registers::CTRL_STAT_REG_B |= (1 << CtrlFlagsB::DATA_REG_EMPTY_INT_ENABLE);