【Arduino】108种传感器模块系列实验（131）--24位WS2812环形灯板

37款传感器与模块的提法，在网络上广泛流传，其实Arduino能够兼容的传感器模块肯定是不止37种的。鉴于本人手头积累了一些传感器和模块，依照实践出真知（一定要动手做）的理念，以学习和交流为目的，这里准备逐一动手试试做实验，不管成功与否，都会记录下来---小小的进步或是搞不定的问题，希望能够抛砖引玉。

【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板

WS2812
是在寻求一种简单，可扩展和经济实惠的全彩LED的最新进展。红色，绿色和蓝色LED与驱动器芯片一起集成到通过单线控制的微小表面贴装封装中。它们可以单独使用，链接成更长的字符串或组装成更有趣的形状因数。基于WS2812的 LED 驱动器，使用单线控制协议，可分别寻址RGB彩色像素和色带。专用LED驱动器芯片的到来带来了可喜的缓解，减轻了微控制器的繁琐工作，使人们可以专注于应用与创造。

该Adafruit NeoPixel环包含24个可单独寻址的RGB LED，这些LED以紧密间隔排列，所有这些均可通过微控制器的单个数字输出进行控制。该环的外径为2.6英寸（66毫米），可以将多个环链接在一起，使其非常适合为小型机器人或可穿戴电子项目增加光泽。

功能和规格
24个可单独寻址的RGB LED（基于SK6812-或WS2812B的NeoPixels）
圆形外径2.6英寸（66毫米），内径2.05英寸（52.5毫米）
24位色彩控制（每通道8位PWM）；每像素1680万种颜色
单线数字控制接口
工作电压：5 V
每个RGB LED在5 V时消耗大约50 mA的电流，红色，绿色和蓝色在全亮度下（环最大为1.2 A）
多个NeoPixel环可链接在一起

24位WS2812 5050 RGB LED智能全彩RGB灯环开发板, 产品（直径）：86mm ,重量：6g ,电压：DC4-7V范围供电,通信接口：单线通讯

LED驱动芯片WS2812(集成在LED里面）
智能反接保护，电源反接不会损坏IC。
IC控制电路与LED点光源公用一个电源。
控制电路与RGB晶片集成在一个5050封装的元器件中，构成一个完整的外控图元点。
内置信号整形电路，任何一个图元点收到信号后经过波形整形再输出，保证线路波形畸变不会累加。
内置上电重定和掉电重定电路。
每个图元点的三基色颜色可实现256级亮度显示，完成16777216种颜色的全真色彩显示，扫描频率不低于400Hz/s。
串列级联介面，能通过一根信号线完成资料的接收与解码。
任意两点传传输距离在不超过5米时无需增加任何电路。
当刷新速率30帧/秒时，级联数不小于1024点。
资料发送速度可达800Kbps。
光的颜色高度一致，性价比高。

5050高亮LED，内置控制芯片，仅需1个IO口即可控制多个LED
芯片内置整形电路，信号畸变不会累计，稳定显示
三基色256级亮度调剂，16万色真彩显示效果，扫描频率不低于400Hz/S
串行连级接口，能通过一根信号线完成数据的接收与解码
高亮LED，光色亮度一致性高
两端有连级接口(DIN DOUT)，可以串接

WS2813B是一个集控制电路与发光电路于一体的智慧外控LED光源。其外型与一个5050LED灯珠相同，每个元件即为一个图元点。图元点内部包含了智慧数位介面资料锁存信号整形放大驱动电路，还包含有高精度的内部振荡器和12V高压可编程定电流控制部分，有效保证了图元点光的颜色高度一致。
资料协定采用单线归零码的通讯方式，图元点在上电重定以后，DIN端接受从控制器传输过来的资料，首先送过来的24bit资料被第一个图元点提取后，送到图元点内部的资料锁存器，剩余的资料经过内部整形处理电路整形放大后通过DO埠开始转发输出给下一个级联的图元点，每经过一个图元点的传输，信号减少24bit。图元点采用自动整形转发技术，使得该图元点的级联个数不受信号传送的限制，仅仅受限信号传输速度要求。
LED具有低电压驱动，环保节能，亮度高，散射角度大，一致性好，超低功率，超长寿命等优点。将控制电路集成于LED上面，电路变得更加简单，体积小，安装更加简便。

连接
LED环具有四个连接点。

标为GND的引脚为接地引脚，应连接至控制LED的微控制器的接地引脚，也应连接至电源的负极。

标有PWR + 5V的引脚是电源输入引脚，应连接到合适的电源。5 V的输入电压用于为环供电，当以全亮度输出白色时，环上的每个LED在5 V时可消耗高达50 mA的电流。这意味着该环最多可吸收约1.2 A电流。

标为“ 数据输入 ”的引脚是一个输入，用于接收控制LED的信号。该引脚应连接至基于SK6812 / WS281x的LED产品的微控制器输出引脚或信号输出引脚。

标有“ 数据输出 ”的引脚是可选的。它可以连接到另一个基于SK6812 / WS281x的LED产品的数据输入引脚，以形成一条链。

我们的0.1英寸排针可以用来连接环的四个针，也可以将导线直接焊接到板上。环并不与任何标头销或连接器发货。

如果在使用NeoPixels时未采取适当的预防措施，则很容易损坏它们。通常，对于基于SK6812 / WS2812B的产品，建议在接地线和电源线之间添加至少10 F的电容器，并在微控制器和信号输入引脚之间添加100Ω至1000Ω的电阻。

模块电原理图

ATTiny85与WS2812 LED环配合使用示意图

/*
  【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
  实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板
  项目一：循环点亮24位绿色LED
  Module      UNO
  VCC   ——   5V
  GND  ——   GND
  DI    ——   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?
#define PIN        6 // On Trinket or Gemma, suggest changing this to 1

// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS 24 // Popular NeoPixel ring size

// When setting up the NeoPixel library, we tell it how many pixels,
// and which pin to use to send signals. Note that for older NeoPixel
// strips you might need to change the third parameter -- see the
// strandtest example for more information on possible values.
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

#define DELAYVAL 300 // Time (in milliseconds) to pause between pixels

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.

  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
}

void loop() {
  pixels.clear(); // Set all pixel colors to 'off'

  // The first NeoPixel in a strand is #0, second is 1, all the way up
  // to the count of pixels minus one.
  for (int i = 0; i < NUMPIXELS; i++) { // For each pixel...

    // pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
    // Here we're using a moderately bright green color:
    pixels.setPixelColor(i, pixels.Color(0, 150, 0));

    pixels.show();   // Send the updated pixel colors to the hardware.

    delay(DELAYVAL); // Pause before next pass through loop
  }
}

1. /*
   
2.   【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
   
3.   实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板
   
4.   项目二：循环快扫24位红绿蓝色LED流水灯
   
5.   Module      UNO
   
6.   VCC   ——   5V
   
7.   GND  ——   GND
   
8.   DI    ——   D6
   
9. */
   
10. 
    
11. #include <FastLED.h>
    
12. #define LED_PIN     6
    
13. #define NUM_LEDS    24
    
14. CRGB leds[NUM_LEDS];
    
15. void setup() {
    
16.   FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
    
17. }
    
18. void loop() {
    
19.   for (int i = 0; i <= 23; i++) {
    
20.     leds[i] = CRGB ( 0, 0, 255);
    
21.     FastLED.show();
    
22.     delay(40);
    
23.   }
    
24.   for (int i = 0; i <= 23; i++) {
    
25.     leds[i] = CRGB ( 255, 0, 0);
    
26.     FastLED.show();
    
27.     delay(40);
    
28.   }
    
29.   for (int i = 0; i <= 23; i++) {
    
30.     leds[i] = CRGB ( 0, 255, 0);
    
31.     FastLED.show();
    
32.     delay(40);
    
33.   }
    
34. }

复制代码

1. /*
   
2.   【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
   
3.   实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板
   
4.   项目三：使用红色、绿色和蓝色三种参数将任何LED设置为任何颜色
   
5.   Module      UNO
   
6.   VCC   ——   5V
   
7.   GND  ——   GND
   
8.   DI    ——   D6
   
9. */
   
10. 
    
11. #include <FastLED.h>
    
12. #define LED_PIN     6
    
13. #define NUM_LEDS    24
    
14. CRGB leds[NUM_LEDS];
    
15. void setup() {
    
16.   FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
    
17.   
    
18. }
    
19. void loop() {
    
20.   
    
21.   leds[0] = CRGB(255, 0, 0);
    
22.   FastLED.show();
    
23.   delay(500);  
    
24.   leds[1] = CRGB(0, 255, 0);
    
25.   FastLED.show();
    
26.   delay(500);
    
27.   leds[2] = CRGB(0, 0, 255);
    
28.   FastLED.show();
    
29.   delay(500);
    
30.   leds[5] = CRGB(150, 0, 255);
    
31.   FastLED.show();
    
32.   delay(500);
    
33.   leds[9] = CRGB(255, 200, 20);
    
34.   FastLED.show();
    
35.   delay(500);
    
36.   leds[14] = CRGB(85, 60, 180);
    
37.   FastLED.show();
    
38.   delay(500);
    
39.   leds[19] = CRGB(50, 255, 20);
    
40.   FastLED.show();
    
41.   delay(500);
    
42. }

复制代码

1. /*
   
2.   【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
   
3.   实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板
   
4.   项目四：流水灯变幻彩虹灯
   
5.   Module      UNO
   
6.   VCC   ——   5V
   
7.   GND  ——   GND
   
8.   DI    ——   D6
   
9. */
   
10. 
    
11. #include <Adafruit_NeoPixel.h>
    
12. 
    
13. #define PIN 6
    
14. #define BRIGHTNESS 24
    
15. 
    
16. Adafruit_NeoPixel strip = Adafruit_NeoPixel(24, PIN, NEO_GRB + NEO_KHZ800);
    
17. 
    
18. void setup() {
    
19.   strip.setBrightness(BRIGHTNESS);
    
20.   strip.begin();
    
21.   strip.show();
    
22. }
    
23. 
    
24. void loop() {
    
25.   colorWipe(strip.Color(150, 0, 0), 50); // Red
    
26.   colorWipe(strip.Color(0, 150, 0), 50); // Green
    
27.   colorWipe(strip.Color(0, 0, 150), 50); // Blue
    
28.   colorWipe(strip.Color(150, 150, 150), 50); // BlueWite
    
29.   rainbowCycle(1);
    
30. 
    
31. }
    
32. 
    
33. void colorWipe(uint32_t c, uint8_t wait) {
    
34.   for (uint16_t i = 0; i < strip.numPixels(); i++) {
    
35.     strip.setPixelColor(i, c);
    
36.     strip.show();
    
37.     delay(wait);
    
38.   }
    
39. }
    
40. 
    
41. void rainbow(uint8_t wait) {
    
42.   uint16_t i, j;
    
43.   for (j = 0; j < 256; j++) {
    
44.     for (i = 0; i < strip.numPixels(); i++) {
    
45.       strip.setPixelColor(i, Wheel((i + j) & 255 ));
    
46.     }
    
47.     strip.show();
    
48.     delay(wait);
    
49.   }
    
50. }
    
51. 
    
52. void rainbowCycle(uint8_t wait) {
    
53.   uint16_t i, j;
    
54.   for (j = 0; j < 256 * 5; j++) { // 5 cycles of all colors on wheel
    
55.     for (i = 0; i < strip.numPixels(); i++) {
    
56.       strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    
57.     }
    
58.     strip.show();
    
59.     delay(wait);
    
60.   }
    
61. }
    
62. 
    
63. uint32_t Wheel(byte WheelPos) {
    
64.   if (WheelPos < 85) {
    
65.     return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
    
66.   } else if (WheelPos < 170) {
    
67.     WheelPos -= 85;
    
68.     return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
    
69.   } else {
    
70.     WheelPos -= 170;
    
71.     return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
    
72.   }
    
73. }

复制代码

1. /*
   
2.   【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
   
3.   实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板
   
4.   项目五：循环流水变幻呼吸灯
   
5.   Module      UNO
   
6.   VCC   ——   5V
   
7.   GND  ——   GND
   
8.   DI    ——   D6
   
9. */
   
10. 
    
11. // NeoPixel test program showing use of the WHITE channel for RGBW
    
12. // pixels only (won't look correct on regular RGB NeoPixel strips).
    
13. 
    
14. #include <Adafruit_NeoPixel.h>
    
15. #ifdef __AVR__
    
16. #include <avr/power.h> // Required for 16 MHz Adafruit Trinket
    
17. #endif
    
18. 
    
19. // Which pin on the Arduino is connected to the NeoPixels?
    
20. // On a Trinket or Gemma we suggest changing this to 1:
    
21. #define LED_PIN     6
    
22. 
    
23. // How many NeoPixels are attached to the Arduino?
    
24. #define LED_COUNT  24
    
25. 
    
26. // NeoPixel brightness, 0 (min) to 255 (max)
    
27. #define BRIGHTNESS 50
    
28. 
    
29. // Declare our NeoPixel strip object:
    
30. Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRBW + NEO_KHZ800);
    
31. // Argument 1 = Number of pixels in NeoPixel strip
    
32. // Argument 2 = Arduino pin number (most are valid)
    
33. // Argument 3 = Pixel type flags, add together as needed:
    
34. //   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
    
35. //   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
    
36. //   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
    
37. //   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
    
38. //   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
    
39. 
    
40. void setup() {
    
41.   // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
    
42.   // Any other board, you can remove this part (but no harm leaving it):
    
43. #if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
    
44.   clock_prescale_set(clock_div_1);
    
45. #endif
    
46.   // END of Trinket-specific code.
    
47. 
    
48.   strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
    
49.   strip.show();            // Turn OFF all pixels ASAP
    
50.   strip.setBrightness(50); // Set BRIGHTNESS to about 1/5 (max = 255)
    
51. }
    
52. 
    
53. void loop() {
    
54.   // Fill along the length of the strip in various colors...
    
55.   colorWipe(strip.Color(255,   0,   0)     , 50); // Red
    
56.   colorWipe(strip.Color(  0, 255,   0)     , 50); // Green
    
57.   colorWipe(strip.Color(  0,   0, 255)     , 50); // Blue
    
58.   colorWipe(strip.Color(  0,   0,   0, 255), 50); // True white (not RGB white)
    
59. 
    
60.   whiteOverRainbow(75, 5);
    
61. 
    
62.   pulseWhite(5);
    
63. 
    
64.   rainbowFade2White(3, 3, 1);
    
65. }
    
66. 
    
67. // Fill strip pixels one after another with a color. Strip is NOT cleared
    
68. // first; anything there will be covered pixel by pixel. Pass in color
    
69. // (as a single 'packed' 32-bit value, which you can get by calling
    
70. // strip.Color(red, green, blue) as shown in the loop() function above),
    
71. // and a delay time (in milliseconds) between pixels.
    
72. void colorWipe(uint32_t color, int wait) {
    
73.   for(int i=0; i<strip.numPixels(); i++) { // For each pixel in strip...
    
74.     strip.setPixelColor(i, color);         //  Set pixel's color (in RAM)
    
75.     strip.show();                          //  Update strip to match
    
76.     delay(wait);                           //  Pause for a moment
    
77.   }
    
78. }
    
79. 
    
80. void whiteOverRainbow(int whiteSpeed, int whiteLength) {
    
81. 
    
82.   if(whiteLength >= strip.numPixels()) whiteLength = strip.numPixels() - 1;
    
83. 
    
84.   int      head          = whiteLength - 1;
    
85.   int      tail          = 0;
    
86.   int      loops         = 3;
    
87.   int      loopNum       = 0;
    
88.   uint32_t lastTime      = millis();
    
89.   uint32_t firstPixelHue = 0;
    
90. 
    
91.   for(;;) { // Repeat forever (or until a 'break' or 'return')
    
92.     for(int i=0; i<strip.numPixels(); i++) {  // For each pixel in strip...
    
93.       if(((i >= tail) && (i <= head)) ||      //  If between head & tail...
    
94.          ((tail > head) && ((i >= tail) || (i <= head)))) {
    
95.         strip.setPixelColor(i, strip.Color(0, 0, 0, 255)); // Set white
    
96.       } else {                                             // else set rainbow
    
97.         int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());
    
98.         strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
    
99.       }
    
100.     }
     
101. 
     
102.     strip.show(); // Update strip with new contents
     
103.     // There's no delay here, it just runs full-tilt until the timer and
     
104.     // counter combination below runs out.
     
105. 
     
106.     firstPixelHue += 40; // Advance just a little along the color wheel
     
107. 
     
108.     if((millis() - lastTime) > whiteSpeed) { // Time to update head/tail?
     
109.       if(++head >= strip.numPixels()) {      // Advance head, wrap around
     
110.         head = 0;
     
111.         if(++loopNum >= loops) return;
     
112.       }
     
113.       if(++tail >= strip.numPixels()) {      // Advance tail, wrap around
     
114.         tail = 0;
     
115.       }
     
116.       lastTime = millis();                   // Save time of last movement
     
117.     }
     
118.   }
     
119. }
     
120. 
     
121. void pulseWhite(uint8_t wait) {
     
122.   for(int j=0; j<256; j++) { // Ramp up from 0 to 255
     
123.     // Fill entire strip with white at gamma-corrected brightness level 'j':
     
124.     strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));
     
125.     strip.show();
     
126.     delay(wait);
     
127.   }
     
128. 
     
129.   for(int j=255; j>=0; j--) { // Ramp down from 255 to 0
     
130.     strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));
     
131.     strip.show();
     
132.     delay(wait);
     
133.   }
     
134. }
     
135. 
     
136. void rainbowFade2White(int wait, int rainbowLoops, int whiteLoops) {
     
137.   int fadeVal=0, fadeMax=100;
     
138. 
     
139.   // Hue of first pixel runs 'rainbowLoops' complete loops through the color
     
140.   // wheel. Color wheel has a range of 65536 but it's OK if we roll over, so
     
141.   // just count from 0 to rainbowLoops*65536, using steps of 256 so we
     
142.   // advance around the wheel at a decent clip.
     
143.   for(uint32_t firstPixelHue = 0; firstPixelHue < rainbowLoops*65536;
     
144.     firstPixelHue += 256) {
     
145. 
     
146.     for(int i=0; i<strip.numPixels(); i++) { // For each pixel in strip...
     
147. 
     
148.       // Offset pixel hue by an amount to make one full revolution of the
     
149.       // color wheel (range of 65536) along the length of the strip
     
150.       // (strip.numPixels() steps):
     
151.       uint32_t pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());
     
152. 
     
153.       // strip.ColorHSV() can take 1 or 3 arguments: a hue (0 to 65535) or
     
154.       // optionally add saturation and value (brightness) (each 0 to 255).
     
155.       // Here we're using just the three-argument variant, though the
     
156.       // second value (saturation) is a constant 255.
     
157.       strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue, 255,
     
158.         255 * fadeVal / fadeMax)));
     
159.     }
     
160. 
     
161.     strip.show();
     
162.     delay(wait);
     
163. 
     
164.     if(firstPixelHue < 65536) {                              // First loop,
     
165.       if(fadeVal < fadeMax) fadeVal++;                       // fade in
     
166.     } else if(firstPixelHue >= ((rainbowLoops-1) * 65536)) { // Last loop,
     
167.       if(fadeVal > 0) fadeVal--;                             // fade out
     
168.     } else {
     
169.       fadeVal = fadeMax; // Interim loop, make sure fade is at max
     
170.     }
     
171.   }
     
172. 
     
173.   for(int k=0; k<whiteLoops; k++) {
     
174.     for(int j=0; j<256; j++) { // Ramp up 0 to 255
     
175.       // Fill entire strip with white at gamma-corrected brightness level 'j':
     
176.       strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));
     
177.       strip.show();
     
178.     }
     
179.     delay(1000); // Pause 1 second
     
180.     for(int j=255; j>=0; j--) { // Ramp down 255 to 0
     
181.       strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));
     
182.       strip.show();
     
183.     }
     
184.   }
     
185. 
     
186.   delay(500); // Pause 1/2 second
     
187. }

复制代码

1. /*
   
2.   【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
   
3.   实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板
   
4.   项目六：多彩流水灯变幻彩虹灯
   
5.   Module      UNO
   
6.   VCC   ——   5V
   
7.   GND  ——   GND
   
8.   DI    ——   D6
   
9. */
   
10. 
    
11. #include <Adafruit_NeoPixel.h>
    
12. #ifdef __AVR__
    
13. #include <avr/power.h> // Required for 16 MHz Adafruit Trinket
    
14. #endif
    
15. 
    
16. // Which pin on the Arduino is connected to the NeoPixels?
    
17. // On a Trinket or Gemma we suggest changing this to 1:
    
18. #define LED_PIN    6
    
19. 
    
20. // How many NeoPixels are attached to the Arduino?
    
21. #define LED_COUNT 24
    
22. 
    
23. // Declare our NeoPixel strip object:
    
24. Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
    
25. // Argument 1 = Number of pixels in NeoPixel strip
    
26. // Argument 2 = Arduino pin number (most are valid)
    
27. // Argument 3 = Pixel type flags, add together as needed:
    
28. //   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
    
29. //   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
    
30. //   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
    
31. //   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
    
32. //   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
    
33. 
    
34. 
    
35. // setup() function -- runs once at startup --------------------------------
    
36. 
    
37. void setup() {
    
38.   // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
    
39.   // Any other board, you can remove this part (but no harm leaving it):
    
40. #if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
    
41.   clock_prescale_set(clock_div_1);
    
42. #endif
    
43.   // END of Trinket-specific code.
    
44. 
    
45.   strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
    
46.   strip.show();            // Turn OFF all pixels ASAP
    
47.   strip.setBrightness(50); // Set BRIGHTNESS to about 1/5 (max = 255)
    
48. }
    
49. 
    
50. 
    
51. // loop() function -- runs repeatedly as long as board is on ---------------
    
52. 
    
53. void loop() {
    
54.   // Fill along the length of the strip in various colors...
    
55.   colorWipe(strip.Color(255,   0,   0), 50); // Red
    
56.   colorWipe(strip.Color(  0, 255,   0), 50); // Green
    
57.   colorWipe(strip.Color(  0,   0, 255), 50); // Blue
    
58. 
    
59.   // Do a theater marquee effect in various colors...
    
60.   theaterChase(strip.Color(127, 127, 127), 50); // White, half brightness
    
61.   theaterChase(strip.Color(127,   0,   0), 50); // Red, half brightness
    
62.   theaterChase(strip.Color(  0,   0, 127), 50); // Blue, half brightness
    
63. 
    
64.   rainbow(10);             // Flowing rainbow cycle along the whole strip
    
65.   theaterChaseRainbow(50); // Rainbow-enhanced theaterChase variant
    
66. }
    
67. 
    
68. 
    
69. // Some functions of our own for creating animated effects -----------------
    
70. 
    
71. // Fill strip pixels one after another with a color. Strip is NOT cleared
    
72. // first; anything there will be covered pixel by pixel. Pass in color
    
73. // (as a single 'packed' 32-bit value, which you can get by calling
    
74. // strip.Color(red, green, blue) as shown in the loop() function above),
    
75. // and a delay time (in milliseconds) between pixels.
    
76. void colorWipe(uint32_t color, int wait) {
    
77.   for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
    
78.     strip.setPixelColor(i, color);         //  Set pixel's color (in RAM)
    
79.     strip.show();                          //  Update strip to match
    
80.     delay(wait);                           //  Pause for a moment
    
81.   }
    
82. }
    
83. 
    
84. // Theater-marquee-style chasing lights. Pass in a color (32-bit value,
    
85. // a la strip.Color(r,g,b) as mentioned above), and a delay time (in ms)
    
86. // between frames.
    
87. void theaterChase(uint32_t color, int wait) {
    
88.   for (int a = 0; a < 10; a++) { // Repeat 10 times...
    
89.     for (int b = 0; b < 3; b++) { //  'b' counts from 0 to 2...
    
90.       strip.clear();         //   Set all pixels in RAM to 0 (off)
    
91.       // 'c' counts up from 'b' to end of strip in steps of 3...
    
92.       for (int c = b; c < strip.numPixels(); c += 3) {
    
93.         strip.setPixelColor(c, color); // Set pixel 'c' to value 'color'
    
94.       }
    
95.       strip.show(); // Update strip with new contents
    
96.       delay(wait);  // Pause for a moment
    
97.     }
    
98.   }
    
99. }
    
100. 
     
101. // Rainbow cycle along whole strip. Pass delay time (in ms) between frames.
     
102. void rainbow(int wait) {
     
103.   // Hue of first pixel runs 5 complete loops through the color wheel.
     
104.   // Color wheel has a range of 65536 but it's OK if we roll over, so
     
105.   // just count from 0 to 5*65536. Adding 256 to firstPixelHue each time
     
106.   // means we'll make 5*65536/256 = 1280 passes through this outer loop:
     
107.   for (long firstPixelHue = 0; firstPixelHue < 5 * 65536; firstPixelHue += 256) {
     
108.     for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
     
109.       // Offset pixel hue by an amount to make one full revolution of the
     
110.       // color wheel (range of 65536) along the length of the strip
     
111.       // (strip.numPixels() steps):
     
112.       int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());
     
113.       // strip.ColorHSV() can take 1 or 3 arguments: a hue (0 to 65535) or
     
114.       // optionally add saturation and value (brightness) (each 0 to 255).
     
115.       // Here we're using just the single-argument hue variant. The result
     
116.       // is passed through strip.gamma32() to provide 'truer' colors
     
117.       // before assigning to each pixel:
     
118.       strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
     
119.     }
     
120.     strip.show(); // Update strip with new contents
     
121.     delay(wait);  // Pause for a moment
     
122.   }
     
123. }
     
124. 
     
125. // Rainbow-enhanced theater marquee. Pass delay time (in ms) between frames.
     
126. void theaterChaseRainbow(int wait) {
     
127.   int firstPixelHue = 0;     // First pixel starts at red (hue 0)
     
128.   for (int a = 0; a < 30; a++) { // Repeat 30 times...
     
129.     for (int b = 0; b < 3; b++) { //  'b' counts from 0 to 2...
     
130.       strip.clear();         //   Set all pixels in RAM to 0 (off)
     
131.       // 'c' counts up from 'b' to end of strip in increments of 3...
     
132.       for (int c = b; c < strip.numPixels(); c += 3) {
     
133.         // hue of pixel 'c' is offset by an amount to make one full
     
134.         // revolution of the color wheel (range 65536) along the length
     
135.         // of the strip (strip.numPixels() steps):
     
136.         int      hue   = firstPixelHue + c * 65536L / strip.numPixels();
     
137.         uint32_t color = strip.gamma32(strip.ColorHSV(hue)); // hue -> RGB
     
138.         strip.setPixelColor(c, color); // Set pixel 'c' to value 'color'
     
139.       }
     
140.       strip.show();                // Update strip with new contents
     
141.       delay(wait);                 // Pause for a moment
     
142.       firstPixelHue += 65536 / 90; // One cycle of color wheel over 90 frames
     
143.     }
     
144.   }
     
145. }

复制代码

1. /*
   
2.   【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
   
3.   实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板
   
4.   项目七：多彩流水灯变幻彩虹灯之三
   
5.   Module      UNO
   
6.   VCC   ——   5V
   
7.   GND  ——   GND
   
8.   DI    ——   D6
   
9. */
   
10. 
    
11. #include <Adafruit_NeoPixel.h>    //needed for the WS2812
    
12. #include <avr/pgmspace.h>         //needed for PROGMEM
    
13. 
    
14. #define PIN 6                    //Pin 1 is DATA In on the bottom Ring
    
15. #define BRIGHTNESS 24             // brightness reduced
    
16. 
    
17. 
    
18. 
    
19. //Lookup for the Candle light
    
20. const unsigned int candles[] PROGMEM =
    
21. {
    
22.   15, 10, 48, 45, 36, 19, 59, 29, 5, 43, 41, 39, 24, 3, 61
    
23. };
    
24. 
    
25. Adafruit_NeoPixel strip = Adafruit_NeoPixel(24, PIN, NEO_GRB + NEO_KHZ800);
    
26. 
    
27. // IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
    
28. // pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
    
29. // and minimize distance between Arduino and first pixel.  Avoid connecting
    
30. // on a live circuit...if you must, connect GND first.
    
31. 
    
32. void setup() {
    
33.   pinMode(PIN, OUTPUT);
    
34.   strip.begin();
    
35.   strip.setBrightness(BRIGHTNESS); // set brightness
    
36.   strip.show(); // Initialize all pixels to 'off'
    
37. }
    
38. 
    
39. void loop() {
    
40.   tree();
    
41.   delay(1000);
    
42. 
    
43.   colorcrazy();
    
44. 
    
45.   theaterChaseRainbow(50);
    
46. 
    
47.   comet();
    
48. 
    
49.   warpdrive();
    
50.   warpdrive();
    
51. 
    
52.   rainbowCycle(1);
    
53. 
    
54.   rainbow(5);
    
55.   rainbow(5);
    
56.   rainbow(5);
    
57. 
    
58. 
    
59.   colorWipe(strip.Color(255, 0, 0), 50); // Red
    
60.   colorWipe(strip.Color(0, 255, 0), 50); // Green
    
61.   colorWipe(strip.Color(0, 0, 255), 50); // Blue
    
62. 
    
63.   //
    
64.   //
    
65.   //  cometr();
    
66.   //Tree light:
    
67. 
    
68.   //
    
69.   //  warpdrive();
    
70.   //
    
71.   //
    
72.   //  comet();
    
73. 
    
74. 
    
75.   /*
    
76.     // Some example procedures showing how to display to the pixels:
    
77.     colorWipe(strip.Color(255, 0, 0), 50); // Red
    
78.     colorWipe(strip.Color(0, 255, 0), 50); // Green
    
79.     colorWipe(strip.Color(0, 0, 255), 50); // Blue
    
80.     // Send a theater pixel chase in...
    
81.     theaterChase(strip.Color(127, 127, 127), 50); // White
    
82.     theaterChase(strip.Color(127,   0,   0), 50); // Red
    
83.     theaterChase(strip.Color(  0,   0, 127), 50); // Blue
    
84.     rainbow(20);
    
85.     rainbowCycle(20);
    
86.     theaterChaseRainbow(50);
    
87.   */
    
88. }
    
89. 
    
90. //Sub-----------------------------------------------------------------------
    
91. 
    
92. //Comet
    
93. void comet() {
    
94.   for (uint16_t i = strip.numPixels(); i > 0; i--) {
    
95.     strip.setPixelColor(i, strip.Color(0, 0, 255));
    
96.     fadethemall(10);
    
97.     fadethemall(10);
    
98.   }
    
99. }
    
100. 
     
101. void cometr() {
     
102.   for (uint16_t i = strip.numPixels(); i > 0; i--) {
     
103.     strip.setPixelColor(i, strip.Color(255, 0, 0));
     
104.     fadethemall(10);
     
105.     fadethemall(10);
     
106.   }
     
107. }
     
108. 
     
109. 
     
110. //From top down white pulses
     
111. void warpdrive() {
     
112. 
     
113.   //Top Led
     
114.   strip.setPixelColor(60, strip.Color(255, 255, 255));
     
115.   strip.show();
     
116.   //fade a bit
     
117.   for (int i = 0; i < 20; i++)
     
118.   {
     
119.     fadethemall(20);
     
120.   }
     
121.   //8 Ring
     
122.   for (int i = 52; i < 60; i++)
     
123.   {
     
124.     strip.setPixelColor(i, strip.Color(255, 255, 255));
     
125.   }
     
126.   strip.show();
     
127.   //fade a bit
     
128.   for (int i = 0; i < 20; i++)
     
129.   {
     
130.     fadethemall(20);
     
131.   }
     
132.   //12 Ring
     
133.   for (int i = 40; i < 52; i++)
     
134.   {
     
135.     strip.setPixelColor(i, strip.Color(255, 255, 255));
     
136.   }
     
137.   strip.show();
     
138.   //fade a bit
     
139.   for (int i = 0; i < 20; i++)
     
140.   {
     
141.     fadethemall(20);
     
142.   }
     
143.   //16 Ring
     
144.   for (int i = 24; i < 40; i++)
     
145.   {
     
146.     strip.setPixelColor(i, strip.Color(255, 255, 255));
     
147.   }
     
148.   strip.show();
     
149.   //fade a bit
     
150.   for (int i = 0; i < 20; i++)
     
151.   {
     
152.     fadethemall(20);
     
153.   }
     
154.   //24 Ring
     
155.   for (int i = 0; i < 24; i++)
     
156.   {
     
157.     strip.setPixelColor(i, strip.Color(255, 255, 255));
     
158.   }
     
159.   strip.show();
     
160.   //fade a bit
     
161.   for (int i = 0; i < 20; i++)
     
162.   {
     
163.     fadethemall(20);
     
164.   }
     
165. 
     
166.   //Extra by John Kerr
     
167.   strip.setPixelColor(60, strip.Color(0, 0, 0));
     
168.   strip.show();
     
169.   //fade a bit
     
170.   for (int i = 0; i < 20; i++)
     
171.   {
     
172.     fadethemall(20);
     
173.   }
     
174. 
     
175. }
     
176. 
     
177. //This reduces the brightness of all leds
     
178. void fadethemall(uint8_t wait) {
     
179.   for (uint16_t i = 0; i < strip.numPixels(); i++) {
     
180.     uint32_t color = strip.getPixelColor(i);
     
181.     int r;
     
182.     int g;
     
183.     int b;
     
184.     r = (uint8_t)(color >> 16);
     
185.     g = (uint8_t)(color >>  8);
     
186.     b = (uint8_t)color;
     
187. 
     
188.     if (r > 0)
     
189.     {
     
190.       r = r - 1;
     
191.     }
     
192.     else
     
193.     {
     
194.       r = 0;
     
195.     }
     
196. 
     
197.     if (g > 0)
     
198.     {
     
199.       g = g - 1;
     
200.     }
     
201.     else
     
202.     {
     
203.       g = 0;
     
204.     }
     
205. 
     
206.     if (b > 0)
     
207.     {
     
208.       b = b - 1;
     
209.     }
     
210.     else
     
211.     {
     
212.       b = 0;
     
213.     }
     
214. 
     
215.     strip.setPixelColor(i, strip.Color(r, g, b));
     
216.   }
     
217.   strip.show();
     
218.   delay(wait);
     
219. }
     
220. 
     
221. //This drives the WS2812 in a crazy pattern, fun!
     
222. void colorcrazy() {
     
223.   colorWipe(strip.Color(255, 0, 0), 25); // Red
     
224.   colorWipe(strip.Color(0, 255, 0), 25); // Green
     
225.   colorWipe(strip.Color(0, 0, 255), 25); // Blue
     
226.   theaterChaseRainbow(5);
     
227. }
     
228. 
     
229. //This lights up the tree in green, then add the white "candles"
     
230. void tree() {
     
231. 
     
232.   colorWipe(strip.Color(0, 50, 0), 50); // Green
     
233. 
     
234.   //light "candles"
     
235.   //Show the S:
     
236.   for (int i = 0; i < 16; i++)
     
237.   {
     
238.     strip.setPixelColor(pgm_read_word(&candles[i]) - 1, strip.Color(255, 255, 255));
     
239.     strip.show();
     
240.     delay(50);
     
241.   }
     
242. }
     
243. 
     
244. // Fill the dots one after the other with a color
     
245. void colorWipe(uint32_t c, uint8_t wait) {
     
246.   for (uint16_t i = 0; i < strip.numPixels(); i++) {
     
247.     strip.setPixelColor(i, c);
     
248.     strip.show();
     
249.     delay(wait);
     
250.   }
     
251. }
     
252. 
     
253. void rainbow(uint8_t wait) {
     
254.   uint16_t i, j;
     
255. 
     
256.   for (j = 0; j < 256; j++) {
     
257.     for (i = 0; i < strip.numPixels(); i++) {
     
258.       strip.setPixelColor(i, Wheel((i + j) & 255));
     
259.     }
     
260.     strip.show();
     
261.     delay(wait);
     
262.   }
     
263. }
     
264. 
     
265. // Slightly different, this makes the rainbow equally distributed throughout
     
266. void rainbowCycle(uint8_t wait) {
     
267.   uint16_t i, j;
     
268. 
     
269.   for (j = 0; j < 256 * 5; j++) { // 5 cycles of all colors on wheel
     
270.     for (i = 0; i < strip.numPixels(); i++) {
     
271.       strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
     
272.     }
     
273.     strip.show();
     
274.     delay(wait);
     
275.   }
     
276. }
     
277. 
     
278. //Theatre-style crawling lights.
     
279. void theaterChase(uint32_t c, uint8_t wait) {
     
280.   for (int j = 0; j < 10; j++) { //do 10 cycles of chasing
     
281.     for (int q = 0; q < 3; q++) {
     
282.       for (int i = 0; i < strip.numPixels(); i = i + 3) {
     
283.         strip.setPixelColor(i + q, c);  //turn every third pixel on
     
284.       }
     
285.       strip.show();
     
286. 
     
287.       delay(wait);
     
288. 
     
289.       for (int i = 0; i < strip.numPixels(); i = i + 3) {
     
290.         strip.setPixelColor(i + q, 0);      //turn every third pixel off
     
291.       }
     
292.     }
     
293.   }
     
294. }
     
295. 
     
296. //Theatre-style crawling lights with rainbow effect
     
297. void theaterChaseRainbow(uint8_t wait) {
     
298.   for (int j = 0; j < 256; j++) {   // cycle all 256 colors in the wheel
     
299.     for (int q = 0; q < 3; q++) {
     
300.       for (int i = 0; i < strip.numPixels(); i = i + 3) {
     
301.         strip.setPixelColor(i + q, Wheel( (i + j) % 255)); //turn every third pixel on
     
302.       }
     
303.       strip.show();
     
304. 
     
305.       delay(wait);
     
306. 
     
307.       for (int i = 0; i < strip.numPixels(); i = i + 3) {
     
308.         strip.setPixelColor(i + q, 0);      //turn every third pixel off
     
309.       }
     
310.     }
     
311.   }
     
312. }
     
313. 
     
314. // Input a value 0 to 255 to get a color value.
     
315. // The colours are a transition r - g - b - back to r.
     
316. uint32_t Wheel(byte WheelPos) {
     
317.   WheelPos = 255 - WheelPos;
     
318.   if (WheelPos < 85) {
     
319.     return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
     
320.   } else if (WheelPos < 170) {
     
321.     WheelPos -= 85;
     
322.     return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
     
323.   } else {
     
324.     WheelPos -= 170;
     
325.     return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
     
326.   }
     
327. }

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1. /*
   
2.   【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
   
3.   实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板
   
4.   项目八：绿色到粉红色，也沿着环形移动
   
5.   Module      UNO
   
6.   VCC   ——   5V
   
7.   GND  ——   GND
   
8.   DI    ——   D6
   
9. */
   
10. 
    
11. #include <PololuLedStrip.h>
    
12. 
    
13. // Create an ledStrip object and specify the pin it will use.
    
14. PololuLedStrip<6> ledStrip;
    
15. 
    
16. // Create a buffer for holding the colors (3 bytes per color).
    
17. #define LED_COUNT 60
    
18. rgb_color colors[LED_COUNT];
    
19. 
    
20. void setup()
    
21. {
    
22. }
    
23. 
    
24. void loop()
    
25. {
    
26.   // Update the colors.
    
27.   byte time = millis() >> 2;
    
28.   for (uint16_t i = 0; i < LED_COUNT; i++)
    
29.   {
    
30.     byte x = time - 8*i;
    
31.     colors[i] = rgb_color(x, 255 - x, x);
    
32.   }
    
33. 
    
34.   // Write the colors to the LED strip.
    
35.   ledStrip.write(colors, LED_COUNT);
    
36. 
    
37.   delay(10);
    
38. }

复制代码

1. /*
   
2.   【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
   
3.   实验一百三十一：24位 WS2812 5050 RGB LED 内置全彩驱动彩灯 圆形开发板
   
4.   项目九：一道移动的彩虹
   
5.   Module      UNO
   
6.   VCC   ——   5V
   
7.   GND  ——   GND
   
8.   DI    ——   D6
   
9. */
   
10. 
    
11. #include <PololuLedStrip.h>
    
12. 
    
13. // Create an ledStrip object and specify the pin it will use.
    
14. PololuLedStrip<6> ledStrip;
    
15. 
    
16. // Create a buffer for holding the colors (3 bytes per color).
    
17. #define LED_COUNT 60
    
18. rgb_color colors[LED_COUNT];
    
19. 
    
20. void setup()
    
21. {
    
22. }
    
23. 
    
24. // Converts a color from HSV to RGB.
    
25. // h is hue, as a number between 0 and 360.
    
26. // s is the saturation, as a number between 0 and 255.
    
27. // v is the value, as a number between 0 and 255.
    
28. rgb_color hsvToRgb(uint16_t h, uint8_t s, uint8_t v)
    
29. {
    
30.     uint8_t f = (h % 60) * 255 / 60;
    
31.     uint8_t p = (255 - s) * (uint16_t)v / 255;
    
32.     uint8_t q = (255 - f * (uint16_t)s / 255) * (uint16_t)v / 255;
    
33.     uint8_t t = (255 - (255 - f) * (uint16_t)s / 255) * (uint16_t)v / 255;
    
34.     uint8_t r = 0, g = 0, b = 0;
    
35.     switch((h / 60) % 6){
    
36.         case 0: r = v; g = t; b = p; break;
    
37.         case 1: r = q; g = v; b = p; break;
    
38.         case 2: r = p; g = v; b = t; break;
    
39.         case 3: r = p; g = q; b = v; break;
    
40.         case 4: r = t; g = p; b = v; break;
    
41.         case 5: r = v; g = p; b = q; break;
    
42.     }
    
43.     return rgb_color(r, g, b);
    
44. }
    
45. 
    
46. void loop()
    
47. {
    
48.   // Update the colors.
    
49.   uint16_t time = millis() >> 2;
    
50.   for(uint16_t i = 0; i < LED_COUNT; i++)
    
51.   {
    
52.     byte x = (time >> 2) - (i << 3);
    
53.     colors[i] = hsvToRgb((uint32_t)x * 359 / 256, 255, 255);
    
54.   }
    
55. 
    
56.   // Write the colors to the LED strip.
    
57.   ledStrip.write(colors, LED_COUNT);
    
58. 
    
59.   delay(10);
    
60. }

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非常经典，谢谢

891558534 发表于 2020-2-8 14:20
非常经典，谢谢

元宵节快乐！谢谢鼓励！

楼主的分享很有意义

ssw2020 发表于 2020-6-22 09:37
楼主的分享很有意义

谢谢鼓励

想问下一直显示这串代码错误是因为什么？
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRBW + NEO_KHZ800);

听风的账号1111 发表于 2020-12-31 15:36
想问下一直显示这串代码错误是因为什么？
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRBW + NEO_K ...

那个程序？具体情况请截个图看看

不好意思，我刚接触arduino，不知这个错误是什么意思，怎么修改，谢谢
stray '#' in program