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  1. //DIGITAL IO LAB CODE
  2. //goal is to use the red button to turn on red lights, and green button to turn on green lights
  3. //include neopixel library
  4. #include <Adafruit_NeoPixel.h>
  5. #ifdef __AVR__
  6.   #include <avr/power.h>
  7. #endif
  8.  
  9. //define neopixel strip pin
  10. #define PIN 6
  11.  
  12. //define strip for number of neopixels
  13. Adafruit_NeoPixel strip = Adafruit_NeoPixel(5, PIN, NEO_GRB + NEO_KHZ800);
  14. //initialize which pins the buttons are located in
  15. //initialize the state to 0 so the LEDs are off
  16. int redbutton = 2;
  17. int greenbutton = 4;
  18. int redbuttonState = 0;
  19. int greenbuttonState = 0;
  20.  
  21. void setup() {
  22.   strip.begin();
  23.   strip.show(); //initialize pixels off
  24.   pinMode(redbutton, INPUT); //initialize the red button as an input
  25.   pinMode(greenbutton, INPUT); //initialize the green button as an input
  26. }
  27.  
  28. void loop() {
  29.   //read which state the buttons are in (pressed or not) to determine output
  30.   redbuttonState = digitalRead(redbutton);
  31.   greenbuttonState = digitalRead(greenbutton);
  32.  
  33.   //turn on LEDs one at a time according to color
  34.   //if red button is pushed and green button is not, turn on red lights
  35.   if ((redbuttonState == HIGH) && (greenbuttonState == LOW)){
  36.     for(uint16_t i=0; i<strip.numPixels(); i++) {
  37.         strip.setPixelColor(i, 255, 0, 0); //set LED strip to red
  38.         strip.show();
  39.         delay(200);
  40.    }
  41.  
  42.   //turn off the red lights
  43.     for(uint16_t i=0; i<strip.numPixels(); i++) {
  44.         strip.setPixelColor(i, 0, 0, 0); //turn all the LEDs off
  45.         strip.show();
  46.         delay(200);
  47.    }
  48.   }
  49.   //if the green button is pushed and the red button is not, turn on green lights
  50.    else if((greenbuttonState == HIGH) && (redbuttonState == LOW)){
  51.     for(uint16_t i=0; i<strip.numPixels(); i++) {
  52.         strip.setPixelColor(i, 0, 255, 0); //set LED strip to green
  53.         strip.show();
  54.         delay(200);
  55.  
  56.     }
  57.     //turn off green lights
  58.       for(uint16_t i=0; i<strip.numPixels(); i++) {
  59.         strip.setPixelColor(i, 0, 0, 0); //turn all the LEDs off
  60.         strip.show();
  61.         delay(200);
  62.    }
  63.   }
  64.    else {
  65.     for(uint16_t i = 0; i<strip.numPixels(); i++){
  66.       strip.setPixelColor(i, 0, 0, 0); // sets LEDs to off
  67.       strip.show();
  68.       delay(50);
  69.     }  
  70.   }
  71.  
  72.  
  73. }
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