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@@ -0,0 +1,123 @@
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+/********************
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+Toaster Project
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+Rev 3
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+Jian Song
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+
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+Functions:
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+1. Drehschalter
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+2. Auslösemagnet
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+3. Temperatursensor
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+4. Heizwendel
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+5. Stoptaste
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+6. LCD
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+7. Kontrollanzeige
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+*********************/
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+
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+void Drehschalter() { //function for calibration of the heating time
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+
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+ int Grades; //define the degrees of browning
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+ unsigned long tmax = 60000; //define the max. heating time
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+ Grades = analogRead(0); //read the data from pin A0 of analog input
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+ if (Grades >= 0 && Grades <= 205) { //input range for A0 is from 0 to 1024(because of 10 bit ADC), define potentiometer as 5 steps
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+ tmax = 10000;
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+ }
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+ if (Grades > 205 && Grades <= 410) {
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+ tmax = 20000;
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+ }
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+ if (Grades > 410 && Grades <= 615) {
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+ tmax = 30000;
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+ }
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+ if (Grades > 615 && Grades <= 820) {
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+ tmax = 40000;
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+ }
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+ if (Grades > 820 && Grades <= 1024) {
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+ tmax = 50000;
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+ }
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+
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+}
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+
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+void Ausloesemagnet() { //function for magnet trigger
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+
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+ int Magnet = 11; //define the magnet
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+ unsigned long t = 0; //define the runtime
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+ pinMode(Magnet, OUTPUT); //set pin 11 as digital output
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+ while (t < tmax) { //run the loop if the runtime is less then tmax
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+ t = millis(); //returns the number of milliseconds since the Arduino board began running the current program
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+ digitalWrite(Magnet, HIGH); //turn on the magnet
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+ }
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+ digitalWrite(Magnet, LOW); //turn off the magnet, if the loop is broken
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+
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+}
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+
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+void Temperatursensor() { //function for reading temperature in celsius
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+
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+ #include <OneWire.h> //use onewire library
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+ #include <DallasTemperature.h> //use dallastemperature library
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+
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+ int tempsensor = 6; //define temperature sensor
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+ double temperature; //define the temperature
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+ double Tmax = 50; //define the max. temperature
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+ OneWire onewirepin(tempsensor); //setup a onewire instance to communicate with any onewire devices
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+ DallasTemperature sensors(&onewirepin); //pass our oneWire reference to dallas temperature
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+ sensors.begin(); //start the library up
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+ sensors.requestTemperatures(); //send the command to get temperatures
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+ temperature=sensors.getTempCByIndex(0); //get the temperature from the first sensor only
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+ if (temperature > Tmax) { //compare the current temperature and max. temperature. if higher than max. , set t as tmax, then that while loop condition in function of ausloesemagnet is not true anymore, so the while loop will be broken until reset.
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+ t = tmax;
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+ }
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+
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+}
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+
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+void Heizwendel() { //function for controlling the heater
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+
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+ #include <PWM.h> //use PWM library
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+
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+ #define PIN_OUTPUT 3 //define pin 3 as output of PWM
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+ int D; //set the dutycycle for PWM(8 bit timer can provide a range from 0 to 255 steps for PWM)
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+ int32_t frequency = 10; //set the frequency of PWM in hertz
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+ InitTimersSafe(); //initialize all timers except for 0, to save time keeping functions(for UNO timer0 and timer2 are 8 bit, timer1 is 16 bit; pins 5 and 6: controlled by timer0; pins 9 and 10: controlled by timer1; pins 11 and 3: controlled by timer2)
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+ bool success = SetPinFrequencySafe(PIN_OUTPUT,frequency); //sets the frequency for pin 3
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+ D = map(analogRead(1), 0, 1023, 0, 255); //re-maps the range of analog input A1 from 0 - 1023 to 0 - 255
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+ pwmWrite(PIN_OUTPUT, D); //use this functions instead of analogWrite on pin 3
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+
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+}
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+
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+void Stoptaste() { //function for the stop button
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+
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+ int S; //define the push button as stop button
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+ S = digitalRead(2); //read HIGH or LOW digital signal from pin 2
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+ if (S == HIGH) { //if the button is pressed, set t as tmax, then that while loop condition in function of ausloesemagnet is not true anymore, so the while loop will be broken until reset.
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+ t = tmax;
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+ }
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+
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+}
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+
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+void LCD() {
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+
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+ #include <LiquidCrystal.h> //use LCD library
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+
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+ LiquidCrystal lcd(13, 12, 10, 9, 8, 7); //initialize the library with the numbers of the interface pins
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+ lcd.begin(16, 2); //set up the LCD's number of columns and rows
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+ lcd.setCursor(0, 0); //set the cursor to column 0, line 0(line 0 is the first row, since counting begins with 0)
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+ lcd.print("T="); //print "Temperature = "
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+ lcd.print(temperature); //print temperature in celsius
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+ lcd.print("`C ");
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+ lcd.print("t="); //print "Time = "
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+ lcd.print(millis()/1000); //print current runtime in seconds
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+ lcd.print("s");
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+ lcd.setCursor(0, 1); //set the cursor to column 0, line 1
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+ lcd.print("D="); //print "Dutycycle = "
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+ lcd.print((D*100)/255); //print current dutycycle in percent
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+ lcd.print("% ");
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+ lcd.print("tmax="); //print "max. runtime = "
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+ lcd.print(tmax/1000); //print preset of max. runtime in seconds
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+ lcd.print("s ");
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+
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+}
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+void Kontrollanzeige() { //shows the status, if PWM is working
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+
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+ #define LED 5
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+ analogWrite(LED, D); //put a LED and resistor between pin 5 and GND
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+}
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+
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+
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