Remove non-functional maintenance link check.

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

diff --git a/Projects/XPLAINBridge/Lib/SoftUART.c b/Projects/XPLAINBridge/Lib/SoftUART.c
index ddd983a..152c4e1 100644 (file)
--- a/Projects/XPLAINBridge/Lib/SoftUART.c
+++ b/Projects/XPLAINBridge/Lib/SoftUART.c
@@ -1,6 +1,6 @@
 /*
              LUFA Library
 /*
              LUFA Library

-     Copyright (C) Dean Camera, 2011.
+     Copyright (C) Dean Camera, 2012.

 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org


@@ -9,7 +9,7 @@
 /*
   Copyright 2010  David Prentice (david.prentice [at] farming [dot] uk)
   Copyright 2010  Peter Danneger
 /*
   Copyright 2010  David Prentice (david.prentice [at] farming [dot] uk)
   Copyright 2010  Peter Danneger

-  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)

 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted
 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted


@@ -52,7 +52,7 @@ static uint8_t RX_BitsRemaining;
 static uint8_t RX_Data;
 
 
 static uint8_t RX_Data;
 
 

-/** Initialises the software UART, ready for data transmission and reception into the global ring buffers. */
+/** Initializes the software UART, ready for data transmission and reception into the global ring buffers. */

 void SoftUART_Init(void)
 {
        /* Set TX pin to output high, enable RX pull-up */
 void SoftUART_Init(void)
 {
        /* Set TX pin to output high, enable RX pull-up */


@@ -81,8 +81,10 @@ ISR(INT0_vect, ISR_BLOCK)
        /* Reset the number of reception bits remaining counter */
        RX_BitsRemaining = 8;
 
        /* Reset the number of reception bits remaining counter */
        RX_BitsRemaining = 8;
 

-       /* Reset the bit reception timer */
-       TCNT1 = 0;
+       /* Reset the bit reception timer to -(1/2) of the total bit time, so that the first data bit is
+        * sampled mid way through the total bit time, making reception more robust.
+        */
+       TCNT1 = -(OCR1A >> 1);

 
        /* Check to see that the pin is still low (prevents glitches from starting a frame reception) */
        if (!(SRXPIN & (1 << SRX)))
 
        /* Check to see that the pin is still low (prevents glitches from starting a frame reception) */
        if (!(SRXPIN & (1 << SRX)))