Tom Igoe Class

Notes from Tom Igoe's classes

Hello class!

Whoopee!

Interactive guide to resistor color codes

int lastSwitchState = LOW;
boolean blinkingOrNot = false;
int ledState = 0;
long lastTimeBlinked = 0;
long interval = 1000;

void setup() {
  pinMode(2, INPUT);
  pinMode(11, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // listen for an input
  int switchState = digitalRead(2);
  // compare the input to its previous state
  if (switchState != lastSwitchState) {
    if (switchState == HIGH) {
      Serial.println("switch is pressed!");
      blinkingOrNot = !blinkingOrNot;
    } 
    else {
      // if the current state is LOW then the button
      // wend from on to off:
      Serial.println("off"); 
    }

  }  
  lastSwitchState = switchState;

  // change the output based on the change
  if (blinkingOrNot == true) {
    if (millis() - lastTimeBlinked > interval) {
    doSomething();
    lastTimeBlinked = millis();
    }
  }
}


void doSomething() {
  digitalWrite(11, ledState);
 ledState = !ledState;
 }

Suzanne's gun program, in progress

const int tiltSwitch = 2;
const int hammerSwitch = 3;

int tiltSwitchState = LOW;
int hammerSwitchState = LOW;
int lastHammerSwitchState = LOW;

boolean gunIsHorizontal = false;
boolean gunIsFired = false;

long timeStamp = 0;

void setup() {
  pinMode(tiltSwitch, INPUT);
  pinMode(hammerSwitch, INPUT);
  Serial.begin(9600);
}

void loop() {
  // read inputs:
  tiltSwitchState = digitalRead(tiltSwitch);
  hammerSwitchState = digitalRead(hammerSwitch);

  // led light turns on, start a clock

  // person pulls out gun

  // tilt switch flips when gun is horizontal
  if (tiltSwitchState == LOW) {
    gunIsHorizontal = true; 
  } 
  else {
    gunIsHorizontal = false; 
  }

  // check if the hammer fired:

  if (hammerSwitchState != lastHammerSwitchState) {
    if ( hammerSwitchState == HIGH) {
      gunIsFired = true; 
      Serial.println("Fired!");
      long howLongToFire = millis() - timeStamp;
      Serial.println(howLongToFire);
    } else {
      gunIsFired = false;
      Serial.println("cocked!");
           timeStamp = millis();
    }

  }
  lastHammerSwitchState = hammerSwitchState;

  //number of milliseconds is captured

  // read switch at the hammer, see when it goes from open to close

    if (gunIsHorizontal )  {
    if (gunIsFired) {
      reportTheScore(); 
    }
  }

  // report the time 
}

void reportTheScore() {

}

Stuff from 10/20/10

Processing code:

import processing.serial.*;
 char thisChar = 0;

Serial myPort;        // The serial port
int graphXPos = 1;    // the horizontal position of the graph:  

void setup () {
  size(400, 300);        // window size

  // List all the available serial ports
  println(Serial.list());
  // I know that the fisrt port in the serial list on my mac
  // is usually my Arduino module, so I open Serial.list()[0].
  // Open whatever port is the one you're using.
  myPort = new Serial(this, Serial.list()[0], 9600);

  // set inital background:
  background(48,31,65);
}
void draw () {
  // nothing happens in draw.  It all happens in SerialEvent()
}

void serialEvent (Serial myPort) {
  // get the byte:
  int inByte = myPort.read(); 
    // print it:
  println(inByte);
  // set the drawing color. Pick a pretty color:
  stroke(123,128,158);
  // draw the line:
  line(graphXPos, height, graphXPos, height - inByte);

  // at the edge of the screen, go back to the beginning:
  if (graphXPos >= width) {
    graphXPos = 0;
    // clear the screen:
    background(48,31,65); 
  } 
  else {
    // increment the horizontal position for the next reading:
    graphXPos++;
  }
  myPort.write(thisChar);
  println("I am being called"); 

}

void keyReleased() {
 thisChar = key;
 myPort.write(thisChar);
  println("I am being called"); 

}

Arduino code:

void setup() {
  Serial.begin(9600); 
  while( Serial.available()<= 0 ) {
    Serial.println("Hello");
  } 

}

void loop() {
  int sensorValue = 0;
  if (Serial.available() > 0 ) {
    int inByte = Serial.read();
    if (inByte == 'x') {
       sensorValue = analogRead(A0);
      Serial.write(sensorValue);
    } 
    else if (inByte == 'y') {
      sensorValue = analogRead(A1);
      Serial.write(sensorValue);
    } 
    else if (inByte == 'z') {
      sensorValue = analogRead(A2);
      Serial.write(sensorValue);
    }
  }
}