STUDIO/LAB MIDTERM

ard_main.ino

// lcd
//#include <SPI.h>
//#include <Adafruit_SSD1306.h>
//#include <Adafruit_GFX.h>
//#include <Wire.h>
//#define OLED_RESET 4
//#define SSD1306_128_64
//Adafruit_SSD1306 display(OLED_RESET);
//#define OLED_address 0x3c

// accel
int Xpin = 5;
int Ypin = 4;
int Zpin = 3;
int accMin = 2;
int accMax = 485;
double accX;
double accY;
double accZ;

// temp sensor
// chose to use Fahrenheit over Celsius because
// number changes are more drastic.
// C: -40 – 50 vs F: -40 – 120
// range: in 76 / out 700
int tempPin = 0;

// piezo sensor
// 5V -> 10ohm -> same side: red, opp side: A1 -> black
// plugged-in: 0 - 1021
// unplugged: 402 - 408
int piezoSensePin = 1;

// cap sensors
// 5V -> 10ohm -> D4 / sensor
// 5V -> 10ohm -> D7 / sensor
// range: 16 - 243
int capSensePin = 4;
int capSensePin2 = 7;

void setup() {

  Serial.begin(115200);
//  Serial.write('0');

  //  display.begin(SSD1306_SWITCHCAPVCC, 0x3c);
  //  display.clearDisplay();

}

void loop() {

  // raw accelerometer readings
  int xRead = analogRead(Xpin);
  int yRead = analogRead(Ypin);
  int zRead = analogRead(Zpin);
  // raw accel reading -> radians -> degrees
  int xAng = map(xRead, accMin, accMax, -90, 90);
  int yAng = map(yRead, accMin, accMax, -90, 90);
  int zAng = map(zRead, accMin, accMax, -90, 90);
  int degX = RAD_TO_DEG * (atan2(-yAng, -zAng) + PI);
  int degY = RAD_TO_DEG * (atan2(-xAng, -zAng) + PI);
  int degZ = RAD_TO_DEG * (atan2(-yAng, -xAng) + PI);

    char input = Serial.read();

    int cap1 = readCapacitivePin(capSensePin);
    Serial.print(cap1);
    Serial.print(",");
    delay(10);

    int cap2 = readCapacitivePin(capSensePin2);
    Serial.print(cap2);
    Serial.print(",");
    delay(10);

    int piezo = analogRead(piezoSensePin);
    Serial.print(piezo);
    Serial.print(",");
    delay(10);

    int temp = convertTemp(tempPin);
    Serial.print(temp);
    Serial.print(",");
    delay(10);

    int axisX = degX;
    Serial.print(axisX);
    Serial.print(",");
    delay(10);

    int axisY = degY;
    Serial.print(axisY);
    Serial.print(",");
    delay(10);

    int axisZ = degZ;
    Serial.println(axisZ);
    delay(100);

//  }

  // lcd text
  //  display.display();
  //  display.clearDisplay();
  //
  //  display.setTextSize(1);
  //  display.setTextColor(WHITE);
  //  display.setCursor(0, 0);
  //  display.print("0: ");
  //    display.println(cap1);
  //    display.print("1: ");
  //    display.println(cap2);
  //    display.print("2: ");
  //    display.println(piezo);
  //    display.print("3: ");
  //    display.println(temp);
  //    display.print("4: ");
  //    display.println(axisX);
  //    display.print("5: ");
  //    display.println(axisY);
  //    display.print("6: ");
  //    display.print(axisZ);

}

// voltage -> Celsius -> Fahrenheit
int convertTemp(float t) {
  float tempRead = analogRead(t);
  float voltage = tempRead * 5.0;
  voltage /= 1024.0;
  float tempC = (voltage - 0.5) * 100;
  float tempF = (tempC * 9.0 / 5.0) + 32.0;
  return tempF;
}

uint8_t readCapacitivePin(int pinToMeasure) {
  volatile uint8_t* port;
  volatile uint8_t* ddr;
  volatile uint8_t* pin;

  // Here we translate the input pin number from
  // Arduino pin number to the AVR PORT, PIN, DDR,
  // and which bit of those registers we care about.
  byte bitmask;
  if ((pinToMeasure >= 0) && (pinToMeasure <= 7)) {
    port = &PORTD;
    ddr = &DDRD;
    bitmask = 1 << pinToMeasure;
    pin = &PIND;
  }
  // set pin to low + output
  *port &= ~(bitmask);
  *ddr  |= bitmask;
  delay(1);
  // make pin an input WITHOUT the internal pull-up on
  *ddr &= ~(bitmask);
  // Now see how long the pin to get pulled up
  int cycles = 16000;
  for (int i = 0; i < cycles; i++) {
    if (*pin & bitmask) {
      cycles = i;
      break;
    }
  }
  *port &= ~(bitmask);
  *ddr  |= bitmask;

  return cycles;
}