X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/cb779e3d7d32d7c43e0a45bb526de0a04135b0c7..a8b66f318dda3cc18dfcedaa3af3d01ab68b82e8:/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 f0ef2b652..ae292a0d4 100644
--- a/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
+++ b/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
@@ -39,7 +39,7 @@
 #if defined(ENABLE_XPROG_PROTOCOL) || defined(__DOXYGEN__)
 
 /** Flag to indicate if the USART is currently in Tx or Rx mode. */
-volatile bool IsSending;
+bool IsSending;
 
 /** Enables the target's PDI interface, holding the target in reset until PDI mode is exited. */
 void XPROGTarget_EnableTargetPDI(void)
@@ -55,13 +55,13 @@ void XPROGTarget_EnableTargetPDI(void)
 	_delay_us(1);
 
 	/* Set up the synchronous USART for XMEGA communications - 8 data bits, even parity, 2 stop bits */
-	UBRR1  = (F_CPU / XPROG_HARDWARE_SPEED);
+	UBRR1  = ((F_CPU / 2 / XPROG_HARDWARE_SPEED) - 1);
 	UCSR1B = (1 << TXEN1);
 	UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
 
-	/* Send two BREAKs of 12 bits each to enable PDI interface (need at least 16 idle bits) */
-	XPROGTarget_SendBreak();
-	XPROGTarget_SendBreak();
+	/* Send two IDLEs of 12 bits each to enable PDI interface (need at least 16 idle bits) */
+	XPROGTarget_SendIdle();
+	XPROGTarget_SendIdle();
 }
 
 /** Enables the target's TPI interface, holding the target in reset until TPI mode is exited. */
@@ -79,13 +79,13 @@ void XPROGTarget_EnableTargetTPI(void)
 	DDRD &= ~(1 << 2);
 
 	/* Set up the synchronous USART for TINY communications - 8 data bits, even parity, 2 stop bits */
-	UBRR1  = (F_CPU / XPROG_HARDWARE_SPEED);
+	UBRR1  = ((F_CPU / 2 / XPROG_HARDWARE_SPEED) - 1);
 	UCSR1B = (1 << TXEN1);
 	UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
 
-	/* Send two BREAKs of 12 bits each to enable TPI interface (need at least 16 idle bits) */
-	XPROGTarget_SendBreak();
-	XPROGTarget_SendBreak();
+	/* Send two IDLEs of 12 bits each to enable TPI interface (need at least 16 idle bits) */
+	XPROGTarget_SendIdle();
+	XPROGTarget_SendIdle();
 }
 
 /** Disables the target's PDI interface, exits programming mode and starts the target's application. */
@@ -115,10 +115,10 @@ void XPROGTarget_DisableTargetTPI(void)
 	UCSR1B  = 0;
 	UCSR1C  = 0;
 
-	/* Set all USART lines as input, tristate */
+	/* Set all USART lines as inputs, tristate */
 	DDRD  &= ~((1 << 5) | (1 << 3));
 	PORTD &= ~((1 << 5) | (1 << 3) | (1 << 2));
-
+	
 	/* Tristate target /RESET line */
 	AUX_LINE_DDR  &= ~AUX_LINE_MASK;
 	AUX_LINE_PORT &= ~AUX_LINE_MASK;
@@ -156,14 +156,14 @@ uint8_t XPROGTarget_ReceiveByte(void)
 	return UDR1;
 }
 
-/** Sends a BREAK via the USART to the attached target, consisting of a full frame of idle bits. */
-void XPROGTarget_SendBreak(void)
+/** Sends an IDLE via the USART to the attached target, consisting of a full frame of idle bits. */
+void XPROGTarget_SendIdle(void)
 {
 	/* Switch to Tx mode if currently in Rx mode */
 	if (!(IsSending))
 	  XPROGTarget_SetTxMode();
-
-	/* Need to do nothing for a full frame to send a BREAK */
+	
+	/* Need to do nothing for a full frame to send an IDLE */
 	for (uint8_t i = 0; i < BITS_IN_USART_FRAME; i++)
 	{
 		/* Wait for a full cycle of the clock */