_SKU_FIT0352__WS2812_RGB灯 - jimaobian/DFRobotWikiCn GitHub Wiki

/*
 This code can be a good test code for your strip
 function: leds.setPixelColor(i,y) can be used to let number i of your led turn on with color of y
 and you can draw your idea easily with this function but never forget function: led.show()
*/

#include <Adafruit_NeoPixel.h>

#define PIN 6     //The signal pin connected with Arduino
#define LED_COUNT 180 // the amount of the leds of your strip

// Create an instance of the Adafruit_NeoPixel class called "leds".
// That'll be what we refer to from here on...
Adafruit_NeoPixel leds = Adafruit_NeoPixel(LED_COUNT, PIN, NEO_GRB + NEO_KHZ800);

void setup()
{
  leds.begin();  // Call this to start up the LED strip.
  clearLEDs();   // This function, defined below, turns all LEDs off...
  leds.show();   // ...but the LEDs don't actually update until you call this.
}

void loop()
{
    for (int i=0; i<LED_COUNT; i++)
  {
    rainbow(i);
    delay(50);  // Delay between rainbow slides
  }
}


// Sets all LEDs to off, but DOES NOT update the display;
// call leds.show() to actually turn them off after this.
void clearLEDs()
{
  for (int i=0; i<LED_COUNT; i++)
  {
    leds.setPixelColor(i, 0);
  }
}

// Prints a rainbow on the ENTIRE LED strip.
//  The rainbow begins at a specified position.
// ROY G BIV!
void rainbow(byte startPosition)
{
  // Need to scale our rainbow. We want a variety of colors, even if there
  // are just 10 or so pixels.
  int rainbowScale = 192 / LED_COUNT;

  // Next we setup each pixel with the right color
  for (int i=0; i<LED_COUNT; i++)
  {
    // There are 192 total colors we can get out of the rainbowOrder function.
    // It'll return a color between red->orange->green->...->violet for 0-191.
    leds.setPixelColor(i, rainbowOrder((rainbowScale * (i + startPosition)) % 192));
  }
  // Finally, actually turn the LEDs on:
  leds.show();
}

// Input a value 0 to 191 to get a color value.
// The colors are a transition red->yellow->green->aqua->blue->fuchsia->red...
//  Adapted from Wheel function in the Adafruit_NeoPixel library example sketch
uint32_t rainbowOrder(byte position)
{
  // 6 total zones of color change:
  if (position < 31)  // Red -> Yellow (Red = FF, blue = 0, green goes 00-FF)
  {
    return leds.Color(0xFF, position * 8, 0);
  }
  else if (position < 63)  // Yellow -> Green (Green = FF, blue = 0, red goes FF->00)
  {
    position -= 31;
    return leds.Color(0xFF - position * 8, 0xFF, 0);
  }
  else if (position < 95)  // Green->Aqua (Green = FF, red = 0, blue goes 00->FF)
  {
    position -= 63;
    return leds.Color(0, 0xFF, position * 8);
  }
  else if (position < 127)  // Aqua->Blue (Blue = FF, red = 0, green goes FF->00)
  {
    position -= 95;
    return leds.Color(0, 0xFF - position * 8, 0xFF);
  }
  else if (position < 159)  // Blue->Fuchsia (Blue = FF, green = 0, red goes 00->FF)
  {
    position -= 127;
    return leds.Color(position * 8, 0, 0xFF);
  }
  else  //160 <position< 191   Fuchsia->Red (Red = FF, green = 0, blue goes FF->00)
  {
    position -= 159;
    return leds.Color(0xFF, 0x00, 0xFF - position * 8);
  }
}