X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/b1dbd92c32022c2ec1601f6a6e51c5714a69c56c..75d27f8ef0873157c4ca14dc41d1eb4139e0180d:/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c?ds=inline

diff --git a/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c b/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
index c1f1a6316..843bf5a7d 100644
--- a/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
+++ b/Projects/AVRISP-MKII/Lib/XPROG/XPROGTarget.c
@@ -1,13 +1,13 @@
 /*
              LUFA Library
-     Copyright (C) Dean Camera, 2009.
+     Copyright (C) Dean Camera, 2010.
               
   dean [at] fourwalledcubicle [dot] com
       www.fourwalledcubicle.com
 */
 
 /*
-  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2010  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
@@ -71,7 +71,7 @@ ISR(TIMER1_COMPA_vect, ISR_BLOCK)
 		  return;
 	
 		/* Shift in the bit one less than the frame size in position, so that the start bit will eventually
-		 * be discarded leaving the data to be byte-aligned for quick access */
+		 * be discarded leaving the data to be byte-aligned for quick access (subtract 9 as we are ORing to the MSB) */
 		if (BITBANG_PDIDATA_PIN & BITBANG_PDIDATA_MASK)
 		  ((uint8_t*)&SoftUSART_Data)[1] |= (1 << (BITS_IN_USART_FRAME - 9));
 
@@ -96,7 +96,7 @@ ISR(TIMER1_COMPA_vect, ISR_BLOCK)
 }
 
 /** ISR to manage the TPI software USART when bit-banged TPI USART mode is selected. */
-ISR(TIMER1_COMPB_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;
@@ -117,7 +117,7 @@ ISR(TIMER1_COMPB_vect, ISR_BLOCK)
 		  return;
 	
 		/* Shift in the bit one less than the frame size in position, so that the start bit will eventually
-		 * be discarded leaving the data to be byte-aligned for quick access */
+		 * be discarded leaving the data to be byte-aligned for quick access (subtract 9 as we are ORing to the MSB) */
 		if (BITBANG_TPIDATA_PIN & BITBANG_TPIDATA_MASK)
 		 ((uint8_t*)&SoftUSART_Data)[1] |= (1 << (BITS_IN_USART_FRAME - 9));
 
@@ -152,14 +152,15 @@ void XPROGTarget_EnableTargetPDI(void)
 	DDRD |=  (1 << 5) | (1 << 3);
 	DDRD &= ~(1 << 2);
 	
-	/* Set DATA line high for at least 90ns to disable /RESET functionality */
+	/* Set DATA line high for at least 90ns to disable /RESET functionality (note: too long will enable it again,
+	 * so a fixed number of NOPs are used here */
 	PORTD |= (1 << 3);
 	asm volatile ("NOP"::);
 	asm volatile ("NOP"::);
 	
 	/* Set up the synchronous USART for XMEGA communications - 
 	   8 data bits, even parity, 2 stop bits */
-	UBRR1  = (F_CPU / 1000000UL);
+	UBRR1  = (F_CPU / 500000UL);
 	UCSR1B = (1 << TXEN1);
 	UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
 #else
@@ -167,7 +168,8 @@ void XPROGTarget_EnableTargetPDI(void)
 	BITBANG_PDIDATA_DDR  |= BITBANG_PDIDATA_MASK;
 	BITBANG_PDICLOCK_DDR |= BITBANG_PDICLOCK_MASK;
 	
-	/* Set DATA line high for at least 90ns to disable /RESET functionality */
+	/* Set DATA line high for at least 90ns to disable /RESET functionality (note: too long will enable it again,
+	 * so a fixed number of NOPs are used here */
 	BITBANG_PDIDATA_PORT |= BITBANG_PDIDATA_MASK;
 	asm volatile ("NOP"::);
 	asm volatile ("NOP"::);
@@ -188,20 +190,19 @@ void XPROGTarget_EnableTargetTPI(void)
 {
 	IsSending = false;
 
-	/* Set /RESET line low for at least 90ns to enable TPI functionality */
+	/* Set /RESET line low for at least 400ns to enable TPI functionality */
 	AUX_LINE_DDR  |=  AUX_LINE_MASK;
 	AUX_LINE_PORT &= ~AUX_LINE_MASK;
-	asm volatile ("NOP"::);
-	asm volatile ("NOP"::);
+	_delay_ms(1);
 
 #if defined(XPROG_VIA_HARDWARE_USART)
 	/* Set Tx and XCK as outputs, Rx as input */
 	DDRD |=  (1 << 5) | (1 << 3);
 	DDRD &= ~(1 << 2);
 		
-	/* Set up the synchronous USART for XMEGA communications - 
+	/* Set up the synchronous USART for TINY communications - 
 	   8 data bits, even parity, 2 stop bits */
-	UBRR1  = (F_CPU / 1000000UL);
+	UBRR1  = (F_CPU / 500000UL);
 	UCSR1B = (1 << TXEN1);
 	UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
 #else
@@ -212,10 +213,10 @@ void XPROGTarget_EnableTargetTPI(void)
 	/* Set DATA line high for idle state */
 	BITBANG_TPIDATA_PORT |= BITBANG_TPIDATA_MASK;
 
-	/* Fire timer capture channel B ISR to manage the software USART */
-	OCR1B   = BITS_BETWEEN_USART_CLOCKS;
-	TCCR1B  = (1 << WGM12) | (1 << CS10);
-	TIMSK1  = (1 << OCIE1B);
+	/* Fire timer capture channel ISR to manage the software USART */
+	ICR1    = BITS_BETWEEN_USART_CLOCKS;
+	TCCR1B  = (1 << WGM13) | (1 << WGM12) | (1 << CS10);
+	TIMSK1  = (1 << ICIE1);
 #endif
 
 	/* Send two BREAKs of 12 bits each to enable TPI interface (need at least 16 idle bits) */
@@ -226,7 +227,14 @@ void XPROGTarget_EnableTargetTPI(void)
 /** Disables the target's PDI interface, exits programming mode and starts the target's application. */
 void XPROGTarget_DisableTargetPDI(void)
 {
+	/* Switch to Rx mode to ensure that all pending transmissions are complete */
+	XPROGTarget_SetRxMode();
+
 #if defined(XPROG_VIA_HARDWARE_USART)
+	/* Set /RESET high for a one millisecond to ensure target device is restarted */
+	PORTD |= (1 << 5);
+	_delay_ms(1);
+
 	/* Turn off receiver and transmitter of the USART, clear settings */
 	UCSR1A |= (1 << TXC1) | (1 << RXC1);
 	UCSR1B  = 0;
@@ -236,6 +244,10 @@ void XPROGTarget_DisableTargetPDI(void)
 	DDRD  &= ~((1 << 5) | (1 << 3));
 	PORTD &= ~((1 << 5) | (1 << 3) | (1 << 2));
 #else
+	/* Set /RESET high for a one millisecond to ensure target device is restarted */
+	BITBANG_PDICLOCK_PORT |= BITBANG_PDICLOCK_MASK;
+	_delay_ms(1);
+
 	/* Set DATA and CLOCK lines to inputs */
 	BITBANG_PDIDATA_DDR   &= ~BITBANG_PDIDATA_MASK;
 	BITBANG_PDICLOCK_DDR  &= ~BITBANG_PDICLOCK_MASK;
@@ -249,6 +261,9 @@ void XPROGTarget_DisableTargetPDI(void)
 /** Disables the target's TPI interface, exits programming mode and starts the target's application. */
 void XPROGTarget_DisableTargetTPI(void)
 {
+	/* Switch to Rx mode to ensure that all pending transmissions are complete */
+	XPROGTarget_SetRxMode();
+
 #if defined(XPROG_VIA_HARDWARE_USART)
 	/* Turn off receiver and transmitter of the USART, clear settings */
 	UCSR1A |= (1 << TXC1) | (1 << RXC1);
@@ -293,7 +308,7 @@ void XPROGTarget_SendByte(const uint8_t Byte)
 	uint16_t NewUSARTData = ((1 << 11) | (1 << 10) | (0 << 9) | ((uint16_t)Byte << 1) | (0 << 0));
 
 	/* Compute Even parity - while a bit is still set, chop off lowest bit and toggle parity bit */
-	uint8_t ParityData    = Byte;
+	uint8_t ParityData = Byte;
 	while (ParityData)
 	{
 		NewUSARTData ^= (1 << 9);
@@ -420,7 +435,7 @@ static void XPROGTarget_SetRxMode(void)
 	}
 	
 	/* Wait until DATA line has been pulled up to idle by the target */
-	while (!(BITBANG_PDIDATA_PIN & BITBANG_PDIDATA_MASK));
+	while (!(BITBANG_PDIDATA_PIN & BITBANG_PDIDATA_MASK) && TimeoutMSRemaining);
 #endif
 
 	IsSending = false;