1  // SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
  2  //
  3  // SPDX-License-Identifier: MIT
  4  
  5  #include <Adafruit_NeoPixel.h>
  6  #include "Adafruit_FreeTouch.h"
  7  #include "Adafruit_APDS9960.h"
  8  
  9  
 10  // Create the neopixel strip with the built in definitions NUM_NEOPIXEL and PIN_NEOPIXEL
 11  Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_NEOPIXEL, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800);
 12  int16_t neo_brightness = 20; // initialize with 20 brightness (out of 255)
 13  
 14  // Create the two touch pads on pins 1 and 2:
 15  Adafruit_FreeTouch qt_1 = Adafruit_FreeTouch(1, OVERSAMPLE_4, RESISTOR_50K, FREQ_MODE_NONE);
 16  Adafruit_FreeTouch qt_2 = Adafruit_FreeTouch(2, OVERSAMPLE_4, RESISTOR_50K, FREQ_MODE_NONE);
 17  
 18  Adafruit_APDS9960 apds;
 19  
 20  void setup() {
 21    Serial.begin(9600);
 22    //while (!Serial);
 23    
 24    strip.begin();
 25    strip.setBrightness(neo_brightness);
 26    strip.show(); // Initialize all pixels to 'off'
 27  
 28    if (! qt_1.begin())  
 29      Serial.println("Failed to begin qt on pin 1");
 30    if (! qt_2.begin())  
 31      Serial.println("Failed to begin qt on pin 2");
 32  
 33    pinMode(PIN_INTERRUPT, INPUT_PULLUP);
 34    if(!apds.begin()){
 35      Serial.println("failed to initialize device! Please check your wiring.");
 36      while (1) {
 37        strip.fill(0xFF0000);
 38        strip.show();
 39        delay(100);
 40        strip.fill(0x00);
 41        strip.show();
 42        delay(100);
 43      }
 44    }
 45    
 46    Serial.println("APDS initialized!");
 47    apds.enableProximity(true);
 48    apds.setProxGain(APDS9960_PGAIN_8X);
 49    apds.setLED(APDS9960_LEDDRIVE_100MA, APDS9960_LEDBOOST_300PCNT);
 50    apds.setProxPulse(APDS9960_PPULSELEN_16US, 1);
 51  
 52    //set the interrupt threshold to fire when proximity reading goes above 2
 53    apds.setProximityInterruptThreshold(0, 2);
 54    apds.enableProximityInterrupt();
 55  }
 56  
 57  uint8_t j=0;
 58  
 59  void loop() {
 60  
 61    // print the proximity reading when the interrupt pin goes low
 62    if (!digitalRead(PIN_INTERRUPT)){
 63      uint16_t prox = apds.readProximity();
 64      Serial.print("Proximity: ");
 65      Serial.println(prox);
 66  
 67      if (prox < 3) prox = 0;  // ignore 1 and 2 readings
 68      strip.setBrightness(prox);
 69  
 70      //clear the interrupt
 71      apds.clearInterrupt();
 72    } else {
 73      strip.setBrightness(0);
 74    }
 75  
 76    strip.fill(Wheel(j));
 77    strip.show();
 78  
 79    // measure the captouches
 80    uint16_t touch1 = qt_1.measure();
 81    uint16_t touch2 = qt_2.measure();
 82  
 83    // If the first pad is touched, go forward
 84    if (touch1 > 500) {
 85      Serial.println("QT 1 touched");
 86      j++;
 87    }
 88  
 89    // If the second pad is touched, go backward
 90    if (touch2 > 500) {
 91      Serial.println("QT 2 touched");
 92      j--;
 93    }
 94  
 95    delay(10);
 96  }
 97  
 98  // Input a value 0 to 255 to get a color value.
 99  // The colours are a transition r - g - b - back to r.
100  uint32_t Wheel(byte WheelPos) {
101    if(WheelPos < 85) {
102     return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
103    } else if(WheelPos < 170) {
104     WheelPos -= 85;
105     return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
106    } else {
107     WheelPos -= 170;
108     return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
109    }
110  }