/*
ohmHook – measuring and manipulting resistance by hand
for the E-Textile Tooling workshop at Eyeo 2016
>> www.github.com/plusea/ohmHook

displays an analog value on an Avago HCMS-39xx display controlled by ATtiny84
original HCMS-39xx display code by Tom Igoe, created 12 June 2008
modified by Hannah Perner-Wilson Apr 2016
*/

#include

// Define pins for the LED display:
#define dataPin 1 // connects to the display’s data in
#define registerSelect 2 // the display’s register select pin
#define clockPin 3 // the display’s clock pin
#define enable 8 // the display’s chip enable pin
#define reset 9 // the display’s reset pin
#define displayLength 4 // number of characters in the display
LedDisplay myDisplay = LedDisplay(dataPin, registerSelect, clockPin, enable, reset, displayLength); // create am instance of the LED display library:
float brightness = 15; // screen brightness

#define buttonPin 5
#define potMinus 6
#define analogPin 7
#define speakerPin 10

int buttonState = 0; // variable for reading the button status
int lastButtonState = 0; // stores the previous state of the button
int mode = 0; // mode will store the current blinking mode (0 – 3)
int myDirection = 1; // direction of scrolling. -1 = left, 1 = right.
int analogValue;
float resistanceValue;
float soundValue;

void setup() {
pinMode(buttonPin, INPUT_PULLUP);
pinMode(analogPin, INPUT);
pinMode(potMinus, OUTPUT);
digitalWrite(potMinus, LOW);
pinMode(speakerPin, OUTPUT);

delay(500);
noise(speakerPin, 100, 200);
noise(speakerPin, 20000, 200);
delay(10);

myDisplay.begin(); // initialize the display library:
myDisplay.setBrightness(brightness); // set the brightness of the display:
myDisplay.clear();
}

void loop() {

// BUTTON //
buttonState = digitalRead(buttonPin); // read the state of the pushbutton

// detect the event of the button going from pressed to not pressed,
// and increment the animation mode when this is detected
if (lastButtonState == HIGH && buttonState == LOW) {
mode = mode + 1;
}

lastButtonState = buttonState; // store current button state as the last button state to use next time through loop()
if (mode > 8) mode = 0;

///// MODE: ANALOG READ /////
if (mode == 0) {
pinMode(potMinus, INPUT);
mode = 1;
}
if (mode == 1) {
analogValue = analogRead(analogPin);
delay(10);
// DISPLAY //
myDisplay.setCursor(0); // set the cursor to 1:
if (analogValue < 1000 && analogValue > 99) myDisplay.print(” “);
if (analogValue < 100 && analogValue > 9) myDisplay.print(” “);
if (analogValue < 10) myDisplay.print(" "); myDisplay.print(analogValue, DEC); } ///// MODE: SYNTH ///// if (mode == 2) { myDisplay.setCursor(0); // set the cursor to 1: myDisplay.print("SYNT"); mode = 3; } if (mode == 3) { analogValue = analogRead(analogPin); if(analogValue < 1010){ soundValue = map(analogValue, 0, 1023, 0, 20000); noise(speakerPin, soundValue, 1); } } ///// MODE: POT RESISTANCE VALUE ///// if (mode == 4) { // READ POT // pinMode(potMinus, OUTPUT); digitalWrite(potMinus, LOW); mode = 5; } if (mode == 5) { analogValue = analogRead(analogPin); delay(10); resistanceValue = map(analogValue, 1023, 0, 0, 500000); // DISPLAY // myDisplay.setCursor(0); // set the cursor to 1 //myDisplay.print(analogValue, DEC); if (resistanceValue >= 450000 && resistanceValue < 500000) myDisplay.print("500K"); if (resistanceValue >= 400000 && resistanceValue < 450000) myDisplay.print("450K"); if (resistanceValue >= 350000 && resistanceValue < 400000) myDisplay.print("400K"); if (resistanceValue >= 300000 && resistanceValue < 350000) myDisplay.print("350K"); if (resistanceValue >= 250000 && resistanceValue < 300000) myDisplay.print("300K"); if (resistanceValue >= 200000 && resistanceValue < 250000) myDisplay.print("250K"); if (resistanceValue >= 100000 && resistanceValue < 200000) myDisplay.print("200K"); if (resistanceValue >= 50000 && resistanceValue < 100000) myDisplay.print("100K"); if (resistanceValue >= 40000 && resistanceValue < 50000) myDisplay.print(" 50K"); if (resistanceValue >= 30000 && resistanceValue < 40000) myDisplay.print(" 40K"); if (resistanceValue >= 20000 && resistanceValue < 30000) myDisplay.print(" 30K"); if (resistanceValue >= 10000 && resistanceValue < 20000) myDisplay.print(" 20K"); if (resistanceValue >= 5000 && resistanceValue < 10000) myDisplay.print(" 10K"); if (resistanceValue >= 1000 && resistanceValue < 5000) myDisplay.print(" 5K"); if (resistanceValue >= 500 && resistanceValue < 1000) myDisplay.print(" 1K"); if (resistanceValue >= 100 && resistanceValue < 500) myDisplay.print(" 500"); if (resistanceValue >= 0 && resistanceValue < 100) myDisplay.print("<100"); } ///// MODE: BRIGHTNESS ///// if (mode == 6) { brightness = map(analogRead(analogPin), 0, 1023, 1, 15); delay(10); brightness = constrain(brightness, 1, 15); myDisplay.setCursor(0); // set the cursor to 1: myDisplay.setBrightness(brightness); // set the brightness of the display //myDisplay.print(brightness, DEC); myDisplay.print("LITE"); } ///// MODE: JOKES ///// if (mode == 7) { myDisplay.clear(); myDisplay.setCursor(0); myDisplay.setString("resistance smells funny!"); mode = 8; } if (mode == 8) { if ((myDisplay.getCursor() > displayLength) ||
(myDisplay.getCursor() <= -(myDisplay.stringLength()))) { myDirection = -myDirection; delay(500); } myDisplay.scroll(myDirection); delay(100); } } void noise (unsigned char noisePin, int frequencyInHertz, long timeInMilliseconds) { int x; long delayAmount = (long)(1000000 / frequencyInHertz); long loopTime = (long)((timeInMilliseconds * 1000) / (delayAmount * 2)); for (x = 0; x < loopTime; x++) { digitalWrite(noisePin, HIGH); delayMicroseconds(delayAmount); digitalWrite(noisePin, LOW); delayMicroseconds(delayAmount); } }