1  // SPDX-FileCopyrightText: 2018 Erin St Blaine for Adafruit Industries
  2  //
  3  // SPDX-License-Identifier: MIT
  4  
  5  // Code by Erin St. Blaine for Adafruit Industries
  6  // NeoPixel Aquarium Tutorial: https://learn.adafruit.com/neopixel-aquarium-with-submersible-lights/
  7  // For QT Py board
  8  
  9  #include "Adafruit_FreeTouch.h"
 10  #include "FastLED.h"
 11  
 12  #define CAPTOUCH_PIN A2  //A2 capacitive touch pin
 13  #define CAPTOUCH_PIN2 A3  //A3 capacitive touch pin
 14  #define NEOPIXEL_PIN A1  //A1 neopixel pin
 15  #define NUM_LEDS    164  //how many pixels total
 16  
 17  #define LED_TYPE    WS2812
 18  #define COLOR_ORDER GRB
 19  CRGB leds[NUM_LEDS];   //LED array 
 20  
 21  // These variables will affect the way the gradient animation looks.  Feel free to mess with them.
 22  int SPEEDO = 10;          
 23  int STEPS = 50;         
 24  int HUE = 0;            
 25  int SATURATION = 255;  
 26  int COLORCHANGE = 50;        
 27  int BRIGHTNESS = 200;     
 28  int onBright = 200;
 29  
 30  // Calibrating your capacitive touch sensitivity: Change this variable to something between your capacitive touch serial readouts for on and off
 31  int touch = 500;    
 32  
 33  long oldState = 0;
 34  long offState = 0;
 35  
 36  // set up capacitive touch button using the FreeTouch library
 37  Adafruit_FreeTouch qt_1 = Adafruit_FreeTouch(CAPTOUCH_PIN, OVERSAMPLE_4, RESISTOR_50K, FREQ_MODE_NONE);
 38  Adafruit_FreeTouch qt_2 = Adafruit_FreeTouch(CAPTOUCH_PIN2, OVERSAMPLE_4, RESISTOR_50K, FREQ_MODE_NONE);
 39  
 40  TBlendType    currentBlending;
 41  CRGBPalette16 currentPalette;
 42  
 43  
 44  void setup() {
 45    Serial.begin(115200);
 46  
 47    if (! qt_1.begin())  
 48     Serial.println("Failed to begin qt on pin A2");
 49    if (! qt_2.begin())  
 50     Serial.println("Failed to begin qt on pin A3");
 51     FastLED.addLeds<WS2812, NEOPIXEL_PIN, COLOR_ORDER>(leds, NUM_LEDS);  // Set up neopixels with FastLED
 52     FastLED.setBrightness(BRIGHTNESS); // set global brightness
 53     FastLED.setMaxPowerInVoltsAndMilliamps(3,350);  //Constrain FastLED's power usage
 54  }
 55  
 56  void loop() {
 57    
 58    Serial.print(qt_1.measure());
 59    Serial.write(' ');
 60    checkpress();   //check to see if the button's been pressed
 61    delay(20);
 62  }
 63  
 64  void checkpress() {
 65  
 66  // Get current button state.
 67   
 68      long newState =  qt_1.measure(); 
 69      long switchState = qt_2.measure(); 
 70      Serial.println(qt_1.measure());
 71      Serial.println(qt_2.measure());
 72     if (newState > touch && oldState < touch) {
 73      // Short delay to debounce button.
 74      delay(500);
 75      // Check if button is still low after debounce.
 76      long newState =  qt_1.measure(); 
 77      long switchState = qt_2.measure();
 78      }
 79      if (switchState > touch && offState < touch) {
 80      // Short delay to debounce button.
 81      delay(500);
 82      // Check if button is still low after debounce.
 83      long newState =  qt_1.measure(); 
 84      }
 85  
 86   
 87    if (newState > touch ) {  
 88       BRIGHTNESS = onBright;
 89       HUE=HUE+COLORCHANGE;  // change the hue by a specified amount each time the cap touch pad is activated
 90    if (HUE > 255){
 91      HUE=0;}
 92     Gradient();
 93      }
 94  //  if (HUE==250) {
 95  //    dark();
 96  //  }
 97      else {
 98        Gradient();
 99        
100      }
101     if (switchState > touch) {
102        if (BRIGHTNESS == onBright){
103          dark();
104          switchState = 0;
105          BRIGHTNESS = 0;
106        }
107        else {
108          BRIGHTNESS = onBright;
109        }
110     }
111  
112     
113      
114    // Set the last button state to the old state.
115    oldState = newState;
116    offState = switchState;
117  
118  } 
119  
120  
121  
122  // GRADIENT --------------------------------------------------------------
123  void Gradient()
124  {
125    SetupGradientPalette();
126  
127    static uint8_t startIndex = 0;
128    startIndex = startIndex - 1;  // motion speed
129  
130    FillLEDsFromPaletteColors( startIndex);
131    FastLED.show();
132    FastLED.delay(SPEEDO);
133  }
134  
135  // adjust hue, saturation and brightness values here to make a pleasing gradient
136  
137  void SetupGradientPalette()
138  {
139    CRGB light = CHSV( HUE + 25, SATURATION - 20, BRIGHTNESS);
140    CRGB lightmed = CHSV (HUE + 15, SATURATION - 10, BRIGHTNESS-50);
141    CRGB medium = CHSV ( HUE + 10, SATURATION - 15, BRIGHTNESS);
142    CRGB dark  = CHSV( HUE, SATURATION, BRIGHTNESS);
143    CRGB black = CHSV (HUE, SATURATION, 0);
144    
145    currentPalette = CRGBPalette16( 
146      black,  light,  light,  light,
147      lightmed, lightmed, lightmed,  medium,
148      medium,  medium,  medium,  dark,
149      dark, dark, dark,  black );
150  }
151  
152  void FillLEDsFromPaletteColors( uint8_t colorIndex)
153  {
154    uint8_t brightness = BRIGHTNESS;
155    
156    for( int i = 0; i < NUM_LEDS; i++) {
157      leds[i] = ColorFromPalette( currentPalette, colorIndex, brightness, currentBlending);
158      colorIndex += STEPS;
159    }
160  }
161  
162  void dark()
163  { 
164    for(int i = 0; i < NUM_LEDS; i++) { 
165    leds[i] = CRGB::Black; 
166    FastLED.show();
167    delay(20);
168  }
169  }