touchSensor.ino

//-------teensy hardware restart
//https://forum.pjrc.com/threads/44857-How-to-Reset-Restart-Teensy-3-5-using-sotware?p=145990&viewfull=1#post145990
//#define RESTART_ADDR 0xE000ED0C
//#define READ_RESTART() (*(volatile uint32_t *)RESTART_ADDR)
//#define WRITE_RESTART(val) ((*(volatile uint32_t *)RESTART_ADDR) = (val))

#ifdef USE_FINGER_TOUCH

unsigned long touchPrint_timer;

float touch_alpha = 0.9;

int touchValue;
int raw_touchValue;
int old_touchValue;

int touchAverage;

//unsigned long touch_onTimer; //touch_onHysteresis;
unsigned long touch_offTimer;
unsigned long onHysteresis = 20;
unsigned long offHysteresis = 20;

bool touchReset = false;
unsigned long overMaxTimer;

int TOUCH_MAX = 65100; //65535;

void setup_touchSensor() {

}

void check_touchSensor() {

#ifdef USE_ADA_TOUCH
  boolean ada_read = digitalRead(ADA_TOUCH_PIN);

  //  Serial.print("ada_read ");
  //  Serial.print(ada_read);
  //  Serial.println();

  if (ada_read == true) {
    //not touching
    if (millis() - touch_offTimer > offHysteresis) isTouched = false;
    touch_onTimer = millis();
  } else {
    //touching
    if (millis() - touch_onTimer > onHysteresis) isTouched = true;
    touch_offTimer = millis();
  }
  //  if (touchValue < touchThreshold) isTouched = false;
  //  else isTouched = true;

  //    Serial.print("touch read ");
  //    Serial.print(r1);
  //    Serial.println();

  if (isTouched != old_isTouched) {
    old_isTouched = isTouched;
    insideSend(isTouched); //finger is inside. send that state to computer
    //    Serial.print("isTouched ");
    //    Serial.println(isTouched);

    if (isTouched == false) {
      set_actuatorBPM(-1, 3);
      bpmSend(-1);
      DEFAULT_BPM = int(random(DEFAULT_BPM_min, DEFAULT_BPM_max));
    }
  }

#else

  old_touchValue = touchValue;
  raw_touchValue = touchRead(TOUCH_PIN); //max retruned value is 65535
  int raw_touchValue2 = touchRead(TOUCH_PIN2);

  if (raw_touchValue < 0) raw_touchValue = 1;
  raw_touchValue = constrain(raw_touchValue, 0, TOUCH_MAX);

  //  Serial.print("raw_touchValue ");
  //  Serial.print(raw_touchValue);
  //  Serial.println();

  //this is a test to work around the problem of the touchSensor causing constant pulsing of the actuator
  /*
    if (raw_touchValue > 60000) {
    //    Serial.print("raw_touchValue ");
    //    Serial.print(raw_touchValue);
    //    Serial.println();

    if (millis() - overMaxTimer > 30000) { // && touchReset == false) {
      overMaxTimer = millis();
      //      touchReset = true;
      //      pinMode(TOUCH_PIN, OUTPUT);
      //      digitalWrite(TOUCH_PIN, LOW);
      Serial.println("reset teensy");
      allOff(0);
      delay(1000);
      WRITE_RESTART(0x5FA0004);
      delay(2000);
    }
    } else {
    overMaxTimer = millis();
    //    touchReset = false;
    }
    //end test
  */

  //create running average of touch value
  //the larger touch_alpha the greater the smoothing
  //the smaller touch_alpha the closer we get to the raw value
  touchValue = int(touch_alpha * old_touchValue) + int((1 - touch_alpha) * raw_touchValue);

  touchValue = constrain(touchValue, 0, TOUCH_MAX); //constrain the running average. not quite to max INT so that later i can send out info about the actual value over osc

  if (touchValue < touchThreshold) {
    //not touching
    if (millis() - touch_offTimer > offHysteresis) isTouched = false;
    touch_onTimer = millis();
  } else {
    //touching
    if (millis() - touch_onTimer > onHysteresis) isTouched = true;
    touch_offTimer = millis();
  }
  //  if (touchValue < touchThreshold) isTouched = false;
  //  else isTouched = true;

  //    Serial.print("touch read ");
  //    Serial.print(r1);
  //    Serial.println();

  if (isTouched != old_isTouched) {
    old_isTouched = isTouched;
    insideSend(isTouched); //finger is inside. send that state to computer
    //    Serial.print("isTouched ");
    //    Serial.println(isTouched);

    if (isTouched == false) {
      set_actuatorBPM(-1, 3);
      bpmSend(-1);
      DEFAULT_BPM = int(random(DEFAULT_BPM_min, DEFAULT_BPM_max));
    }
  }

  //  float touchAvg_alpha = 0.99;
  //  if (raw_touchValue < 6000) {
  //    touchAverage = touchAvg_alpha * touchAverage + (1 - touchAvg_alpha) * raw_touchValue;
  ////    touchThreshold = touchAverage;
  //  }

#endif //end else USE_ADA_TOUCH

  //  Serial.print("isTouched ");
  //  Serial.print(isTouched);
  //  Serial.println();

#ifdef USE_FINGER
  if (bDebug) {
    if (millis()  - touchPrint_timer > 1000) {

      //to help troubleshoot sound out 1234 if actual touchValue was bad
      if (touchValue >= 0 && touchValue < TOUCH_MAX - 100) touchReadSend(touchValue, 0); //touchAverage);
      else  touchReadSend(12345, 0);

      touchPrint_timer = millis();
      Serial.print("touchVal ");
      Serial.print(touchValue);
      Serial.print(" / ");
      Serial.print(touchThreshold);
      Serial.print(" / ");
      Serial.print(raw_touchValue);
      Serial.print(" / ");
      Serial.print(raw_touchValue2);
      Serial.println();

    }
  }
#endif
}

#endif