X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/5e12d436fa31399ba6b5c8cab484d4a7b5adf7e7..aca7863350509a1f390eda93ac0150378d8cd16c:/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c

diff --git a/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c b/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
index 85a750454..957084c0b 100644
--- a/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
+++ b/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
@@ -53,12 +53,13 @@ volatile uint16_t           SoftUSART_Data;
 ISR(TIMER1_COMPA_vect, ISR_BLOCK)
 {
 	/* Toggle CLOCK pin in a single cycle (see AVR datasheet) */
-	BITBANG_PDICLOCK_PIN |= BITBANG_PDICLOCK_MASK;
+	BITBANG_PDICLOCK_PIN = BITBANG_PDICLOCK_MASK;
 
 	/* If not sending or receiving, just exit */
 	if (!(SoftUSART_BitCount))
 	  return;
 
+	/* Check to see if we are at a rising or falling edge of the clock */
 	if (BITBANG_PDICLOCK_PORT & BITBANG_PDICLOCK_MASK)
 	{
 		/* If at rising clock edge and we are in send mode, abort */
@@ -102,7 +103,7 @@ ISR(TIMER1_COMPA_vect, ISR_BLOCK)
 ISR(TIMER1_CAPT_vect, ISR_BLOCK)
 {
 	/* Toggle CLOCK pin in a single cycle (see AVR datasheet) */
-	BITBANG_TPICLOCK_PIN |= BITBANG_TPICLOCK_MASK;
+	BITBANG_TPICLOCK_PIN = BITBANG_TPICLOCK_MASK;
 
 	/* If not sending or receiving, just exit */
 	if (!(SoftUSART_BitCount))