1. #include <Adafruit_NeoPixel.h>
    3. #define PIN    2
    4. #define NUMPIXELS 24
    5. #define BRIGHTNESS 50
    6. #define DELAYVAL 500
    8. Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
    10. int MODE = 0; // 模式
    11. void setup() {
    12.   strip.setBrightness(BRIGHTNESS);
    13.   // 初始化Adafruit_NeoPixel库
    14.   strip.begin();
    15.   // 初始化时关闭所有LED        
    16.   strip.show(); 
    17. }
    19. void loop() {
    20.   switch(MODE){
    21.     case 0: RunningWater(); break;
    22.     case 1: colorWipe(strip.Color(150, 150, 150), 50); break;// BlueWite
    23.     case 2: rainbowCycle(1);
    24.     case 3: rainbow(50);
    25.     case 4: rainbowCycle(1);
    26.     }
    27.     MODE++;
    28.     if(MODE == 4){
    29.       MODE = 0;
    30.       }
    32. }
    34. /**
    35.  * 模式: 颜色擦除
    36.  */
    37. void colorWipe(uint32_t c, uint8_t wait) {
    38.   strip.clear();
    39.   for (uint16_t i = 0; i < strip.numPixels(); i++) {
    40.     strip.setPixelColor(i, c);
    41.     strip.show();
    42.     delay(wait);
    43.   }
    44. }
    46. /**
    47.  * 彩虹呼吸
    48.  */
    49. void rainbow(uint8_t wait) {
    50.   uint16_t i, j;
    51.   for (j = 0; j < 256; j++) {
    52.     for (i = 0; i < strip.numPixels(); i++) {
    53.       strip.setPixelColor(i, Wheel((i + j) & 255 ));
    54.     }
    55.     strip.show();
    56.     delay(wait);
    57.   }
    58. }
    60. /**
    61.  * 彩虹呼吸-旋转
    62.  */
    63. void rainbowCycle(uint8_t wait) {
    64.   uint16_t i, j;
    65.   for (j = 0; j < 256 * 5; j++) { // 5 cycles of all colors on wheel
    66.     for (i = 0; i < strip.numPixels(); i++) {
    67.       strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    68.     }
    69.     strip.show();
    70.     delay(wait);
    71.   }
    72. }
    73. /**
    74.  * 走马灯
    75.  */
    76. void theaterChase(uint32_t c, uint8_t wait) {
    77.   for (int j=0; j<10; j++) {  //do 10 cycles of chasing
    78.     for (int q=0; q < 3; q++) {
    79.       for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
    80.         strip.setPixelColor(i+q, c);    //turn every third pixel on
    81.       }
    82.       strip.show();
    84.       delay(wait);
    86.       for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
    87.         strip.setPixelColor(i+q, 0);        //turn every third pixel off
    88.       }
    89.     }
    90.   }
    91. }
    92. /**
    93.  * 走马灯-彩虹
    94.  */
    95. void theaterChaseRainbow(uint8_t wait) {
    96.   for (int j=0; j < 256; j++) {     // cycle all 256 colors in the wheel
    97.     for (int q=0; q < 3; q++) {
    98.       for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
    99.         strip.setPixelColor(i+q, Wheel( (i+j) % 255));    //turn every third pixel on
    100.       }
    101.       strip.show();
    103.       delay(wait);
    105.       for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
    106.         strip.setPixelColor(i+q, 0);        //turn every third pixel off
    107.       }
    108.     }
    109.   }
    110. }
    111. uint32_t Wheel(byte WheelPos) {
    112.   if (WheelPos < 85) {
    113.     return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
    114.   } else if (WheelPos < 170) {
    115.     WheelPos -= 85;
    116.     return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
    117.   } else {
    118.     WheelPos -= 170;
    119.     return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
    120.   }
    121. }