Make XPLAINBridge serial bridge much more reliable for the reception of characters...

[pub/USBasp.git] / Projects / XPLAINBridge / Lib / SoftUART.c

diff --git a/Projects/XPLAINBridge/Lib/SoftUART.c b/Projects/XPLAINBridge/Lib/SoftUART.c
index a23ea45..02223af 100644 (file)
--- a/Projects/XPLAINBridge/Lib/SoftUART.c
+++ b/Projects/XPLAINBridge/Lib/SoftUART.c
@@ -79,18 +79,12 @@ ISR(INT0_vect, ISR_BLOCK)
        RX_Data    = 0;
        RX_BitMask = (1 << 0);
 
        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 */
-               TIFR1 = (1 << OCF1A);
-
-               /* Still low, enable bit receive ISR */
-               TIMSK1 =  (1 << OCIE1A);                
+       /* Clear reception channel ISR flag and enable the bit reception ISR */
+       TIFR1  = (1 << OCF1A);
+       TIMSK1 = (1 << OCIE1A);         

 
 

-               /* Clear the start bit detection ISR flag */
-               EIMSK &= ~(1 << INT0);
-       }
+       /* 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. */
 }
 
 /** ISR to manage the reception of bits to the software UART. */