Make XPLAINBridge serial bridge much more reliable for the reception of characters from the XMEGA through the software UART interface.

Projects/XPLAINBridge/Lib/SoftUART.c

@@ -79,18 +79,12 @@ ISR(INT0_vect, ISR_BLOCK)
 	RX_Data    = 0;
 	RX_BitMask = (1 << 0);
 
-	/* Check that the start bit is still low to prevent noise from triggering a reception */
-	if (!(SRXPIN & (1 << SRX)))
-	{
-		/* Clear reception channel ISR flag in case it is pending */
+	/* Clear reception channel ISR flag and enable the bit reception ISR */
 	TIFR1  = (1 << OCF1A);
-
-		/* Still low, enable bit receive ISR */
 	TIMSK1 = (1 << OCIE1A);		
 
-		/* Clear the start bit detection ISR flag */
+	/* Disable start bit detection ISR while the next byte is received */
 	EIMSK &= ~(1 << INT0);
-	}
 }
 
 /** ISR to manage the reception of bits to the software UART. */