【花雕动手做】有趣好玩的音乐可视化系列小项目（26）--LED 超立方体 中等

/*
 【花雕动手做】有趣好玩的音乐可视化系列小项目（26）--LED 超立方体
  项目程序之一：绿色单灯循环测试
  模块接线：WS2812B接D6
  MAX4466      UNO
  VCC          5V
  GND         GND
  OUT          D6
*/

#include <Adafruit_NeoPixel.h>

#define PIN 6
#define MAX_LED 255

#define ADD true
#define SUB false

int val = 0;
boolean stat = ADD;

Adafruit_NeoPixel strip = Adafruit_NeoPixel(MAX_LED, PIN, NEO_RGB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.show();
}

void loop() {
  uint8_t i, a = 0;
  uint32_t color = strip.Color(255, 0, 0);
  while (a < 256) {
    for (i = 0; i < 255; i++) {
      if (i == a) strip.setPixelColor(i, color);
      else strip.setPixelColor(i, 0);
    }
    strip.show();
    delay(2);
    a++;
  }
}

/*
 【花雕动手做】有趣好玩的音乐可视化系列小项目（26）--LED 超立方体
  项目程序之二：NeoPixel 环形灯带测试程序
  模块接线：WS2812B接D6
  MAX4466      UNO
  VCC          5V
  GND         GND
  OUT          D6
*/

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>  // Required for 16 MHz Adafruit Trinket
#endif

// Which pin on the Arduino is connected to the NeoPixels?
// On a Trinket or Gemma we suggest changing this to 1:
#define LED_PIN 6

// How many NeoPixels are attached to the Arduino?
#define LED_COUNT 384

// Declare our NeoPixel strip object:
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
// Argument 1 = Number of pixels in NeoPixel strip
// Argument 2 = Arduino pin number (most are valid)
// Argument 3 = Pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
//   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)


// setup() function -- runs once at startup --------------------------------

void setup() {
  // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
  // Any other board, you can remove this part (but no harm leaving it):
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif
  // END of Trinket-specific code.

  strip.begin();            // INITIALIZE NeoPixel strip object (REQUIRED)
  strip.show();             // Turn OFF all pixels ASAP
  strip.setBrightness(40);  // Set BRIGHTNESS to about 1/5 (max = 255)
}


// loop() function -- runs repeatedly as long as board is on ---------------

void loop() {
  // Fill along the length of the strip in various colors...
  colorWipe(strip.Color(255, 0, 0), 250);  // Red
  colorWipe(strip.Color(0, 255, 0), 250);  // Green
  colorWipe(strip.Color(0, 0, 255), 250);  // Blue

  // Do a theater marquee effect in various colors...
  theaterChase(strip.Color(127, 127, 127), 250);  // White, half brightness
  theaterChase(strip.Color(127, 0, 0), 250);      // Red, half brightness
  theaterChase(strip.Color(0, 0, 127), 250);      // Blue, half brightness

  rainbow(10);              // Flowing rainbow cycle along the whole strip
  theaterChaseRainbow(50);  // Rainbow-enhanced theaterChase variant
}


// Some functions of our own for creating animated effects -----------------

// Fill strip pixels one after another with a color. Strip is NOT cleared
// first; anything there will be covered pixel by pixel. Pass in color
// (as a single 'packed' 32-bit value, which you can get by calling
// strip.Color(red, green, blue) as shown in the loop() function above),
// and a delay time (in milliseconds) between pixels.
void colorWipe(uint32_t color, int wait) {
  for (int i = 0; i < strip.numPixels(); i++) {  // For each pixel in strip...
    strip.setPixelColor(i, color);               //  Set pixel's color (in RAM)
    strip.show();                                //  Update strip to match
    delay(30);                                   //  Pause for a moment
  }
}

// Theater-marquee-style chasing lights. Pass in a color (32-bit value,
// a la strip.Color(r,g,b) as mentioned above), and a delay time (in ms)
// between frames.
void theaterChase(uint32_t color, int wait) {
  for (int a = 0; a < 20; a++) {   // Repeat 10 times...
    for (int b = 0; b < 3; b++) {  //  'b' counts from 0 to 2...
      strip.clear();               //   Set all pixels in RAM to 0 (off)
      // 'c' counts up from 'b' to end of strip in steps of 3...
      for (int c = b; c < strip.numPixels(); c += 3) {
        strip.setPixelColor(c, color);  // Set pixel 'c' to value 'color'
      }
      strip.show();  // Update strip with new contents
      delay(30);     // Pause for a moment
    }
  }
}

// Rainbow cycle along whole strip. Pass delay time (in ms) between frames.
void rainbow(int wait) {
  // Hue of first pixel runs 5 complete loops through the color wheel.
  // Color wheel has a range of 65536 but it's OK if we roll over, so
  // just count from 0 to 5*65536. Adding 256 to firstPixelHue each time
  // means we'll make 5*65536/256 = 1280 passes through this outer loop:
  for (long firstPixelHue = 0; firstPixelHue < 2 * 65536; firstPixelHue += 256) {
    for (int i = 0; i < strip.numPixels(); i++) {  // For each pixel in strip...
      // Offset pixel hue by an amount to make one full revolution of the
      // color wheel (range of 65536) along the length of the strip
      // (strip.numPixels() steps):
      int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());
      // strip.ColorHSV() can take 1 or 3 arguments: a hue (0 to 65535) or
      // optionally add saturation and value (brightness) (each 0 to 255).
      // Here we're using just the single-argument hue variant. The result
      // is passed through strip.gamma32() to provide 'truer' colors
      // before assigning to each pixel:
      strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
    }
    strip.show();  // Update strip with new contents
    delay(2);      // Pause for a moment
  }
}

// Rainbow-enhanced theater marquee. Pass delay time (in ms) between frames.
void theaterChaseRainbow(int wait) {
  int firstPixelHue = 0;           // First pixel starts at red (hue 0)
  for (int a = 0; a < 30; a++) {   // Repeat 30 times...
    for (int b = 0; b < 3; b++) {  //  'b' counts from 0 to 2...
      strip.clear();               //   Set all pixels in RAM to 0 (off)
      // 'c' counts up from 'b' to end of strip in increments of 3...
      for (int c = b; c < strip.numPixels(); c += 3) {
        // hue of pixel 'c' is offset by an amount to make one full
        // revolution of the color wheel (range 65536) along the length
        // of the strip (strip.numPixels() steps):
        int hue = firstPixelHue + c * 65536L / strip.numPixels();
        uint32_t color = strip.gamma32(strip.ColorHSV(hue));  // hue -> RGB
        strip.setPixelColor(c, color);                        // Set pixel 'c' to value 'color'
      }
      strip.show();                 // Update strip with new contents
      delay(50);                    // Pause for a moment
      firstPixelHue += 65536 / 90;  // One cycle of color wheel over 90 frames
    }
  }
}