From b4d10ed933cf32854856cb216a74597ecf1d09ba Mon Sep 17 00:00:00 2001
From: Tristan Krause <tristan.krause@stud.htwk-leipzig.de>
Date: Thu, 28 Mar 2019 13:32:24 +0100
Subject: [PATCH] watchdog zuverlaessig

---
 B15F.elf     | Bin 13352 -> 13340 bytes
 B15F.hex     | 329 ++++++++++++++++++++++++++-------------------------
 main.cpp     |  37 +++---
 requests.cpp |   4 +-
 usart.cpp    |  10 +-
 usart.h      |   2 +-
 6 files changed, 191 insertions(+), 191 deletions(-)

diff --git a/B15F.elf b/B15F.elf
index eba4908a3d6fdf1806ad017390820f3a7cbbc27f..88ba6c1a0fece1a139d94bbb690fe562622da52f 100644
GIT binary patch
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diff --git a/B15F.hex b/B15F.hex
index 5994665..b02a567 100644
--- a/B15F.hex
+++ b/B15F.hex
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 :00000001FF
diff --git a/main.cpp b/main.cpp
index d9da7a1..6383029 100644
--- a/main.cpp
+++ b/main.cpp
@@ -8,13 +8,6 @@
 
 
 #define WDT_TIMEOUT WDTO_15MS
-const uint8_t CDUMMY __attribute__((used)) = 0;
-
-
-ISR(WDT_vect)
-{
-	WDTCSR = _BV(WDIE) | _BV(WDE);
-}
 
 void initAll()
 {
@@ -32,27 +25,25 @@ void initAll()
 	// aktiviere Interrupts
 	sei();
 	
-	// starte WDT
-	wdt_enable(WDT_TIMEOUT);
-	WDTCSR = _BV(WDIE) | _BV(WDE);
-	wdt_reset();
+	// deaktiviere WDT VOLLSTAENDIG
+	MCUSR &= ~_BV(WDRF);
+	WDTCSR = 0;
+	wdt_disable();
 }
 
 void handleRequest()
 {	
-	const uint8_t req = usart.readByte();	
-	wdt_reset();
+	wdt_disable();
 
+	const uint8_t req = usart.readByte();
+
+	// starte WDT
+	wdt_enable(WDT_TIMEOUT);
+	wdt_reset();
+	
 	switch(req)
 	{
 		case RQ_DISC:
-			{
-				// sinnlose Abfrage, damit Compiler nicht nervt
-				uint8_t dummy = 0xFF;
-				if(dummy)
-					// leere Puffer
-					while(UCSR0A & (1<<RXC0)) dummy = UDR0;
-			}
 			break;
 
 		case RQ_TEST:
@@ -109,6 +100,12 @@ int main()
 
 	initAll();
 
+	/*
+	// Reset anzeigen
+	beba0.writePortA(0xFF);
+	_delay_ms(100);
+	beba0.writePortA(0x00);*/
+
 	while(1)
 	{
 		handleRequest();
diff --git a/requests.cpp b/requests.cpp
index 84ffae9..b9e5361 100644
--- a/requests.cpp
+++ b/requests.cpp
@@ -87,12 +87,12 @@ void rqAdcDacStroke()
 	int16_t start = static_cast<int16_t>(usart.readInt());
 	int16_t delta = static_cast<int16_t>(usart.readInt());
 	int16_t count = static_cast<int16_t>(usart.readInt());
-	
+
 	usart.writeByte(USART::MSG_OK);
 	
 	count *= delta;
 	
-	for(int16_t i = start; i != count; i += delta)
+	for(int16_t i = start; i < count; i += delta)
 	{
 		dac0.setValue(i);
 		wdt_reset();
diff --git a/usart.cpp b/usart.cpp
index cf2a02e..abe48b5 100644
--- a/usart.cpp
+++ b/usart.cpp
@@ -19,21 +19,23 @@ void USART::writeByte(uint8_t b)
 {
 	while (!(UCSR0A & (1<<UDRE0)));
 	UDR0 = b;
-	
-	//while(!(UCSR0A & _BV(TXC0)));
+
+	// while(!(UCSR0A & _BV(TXC0)));
 }
 
 
 void USART::writeInt(uint16_t v)
 {
+
+
 	while (!(UCSR0A & (1<<UDRE0)));
 	UDR0 = v & 0xFF;
 	
 	v >>= 8;
 	while (!(UCSR0A & (1<<UDRE0)));
 	UDR0 = v & 0xFF;
-	
-	//while(!(UCSR0A & _BV(TXC0)));
+
+	// while(!(UCSR0A & _BV(TXC0)));
 }
 
 void USART::writeStr(const char* str, uint8_t len)
diff --git a/usart.h b/usart.h
index d6acd76..00cdb37 100644
--- a/usart.h
+++ b/usart.h
@@ -5,7 +5,7 @@
 #include <util/delay.h>
 #include <stdint.h>
 
-constexpr uint32_t BAUDRATE = 115200; // 38400
+constexpr uint32_t BAUDRATE = 38400; // 38400
 
 class USART
 {