【BPI:bit入门系列】使用按键控制LED的亮与灭

[hulkwang]

BPI:bit 的正面板采用的是1600w色真色彩的LED-WS2812，那么也就是说我们后面可以玩很多各种花样了。这个灯具体怎么玩，我后面会整理一下和大家分享，我也只是会用基本的函数

这次先来玩一个简单点的。通过按键来控制LED的亮与灭，

• 代码如下
  #include <Arduino.h>
  #include <NeoPixelBus.h>

  #define LEDC_CHANNEL_0 0
  #define LEDC_TIMER_13_BIT 13
  #define LEDC_BASE_FREQ 4500
  
  const uint16_t PixelCount = 25;
  const uint8_t PixelPin = 4;
  
  #define colorSaturation 128
  #define delay_ms 500
  
  NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
  
  RgbColor red(colorSaturation, 0, 0);
  RgbColor green(0, colorSaturation, 0);
  RgbColor blue(0, 0, colorSaturation);
  RgbColor white(colorSaturation);
  RgbColor black(0);
  RgbColor num1(0.8 * colorSaturation, 0, 0.2 * colorSaturation);
  RgbColor num2(0.5 * colorSaturation, 0, 0.5 * colorSaturation);
  RgbColor num3(0.25 * colorSaturation, 0, 0.75 * colorSaturation);
  
  HslColor hslRed(red);
  HslColor hslGreen(green);
  HslColor hslBlue(blue);
  HslColor hslWhite(white);
  HslColor hslBlack(black);
  
  #define ledPower 2
  #define BottomA 35
   #define BottomB 27
  
   void ledcAnalogWrite(uint8_t channel, uint32_t value)
   {
    // calculate duty, 8191 from 2 ^ 13 - 1 (2 ^ LEDC_TIMER_13_BIT - 1)
    //value_MAX = 255
    uint32_t duty = (8191 / 255) * value;
      // write duty to LEDC
    ledcWrite(channel, duty);
   }
  
   void setup()
   {
       Serial.begin(115200); //Serial Port Config 115200-8-N-1
       while (!Serial)
           ; // wait for serial attach
  
    Serial.println();
    Serial.println("Initializing...");
    Serial.flush();
  
    // this resets all the neopixels to an off state
    strip.Begin();
    strip.Show();
  
    pinMode(ledPower,OUTPUT);
    pinMode(BottomA, INPUT);
    pinMode(BottomB, INPUT);
    digitalWrite(ledPower, HIGH);
  
    // strip.SetPixelColor(10, blue);
    // strip.SetPixelColor(11, blue);
    // strip.SetPixelColor(12, blue);
    // strip.SetPixelColor(13, blue);
    // strip.SetPixelColor(14, red);
    // strip.Show();
  
    // delay(1000);
  
    // int i;
    // for (i = 0; i <= PixelCount - 1; i++)
    // {
    //     strip.SetPixelColor(i, black);
    //     strip.Show();
    // }
   }
  
   void loop()
   {
      if (digitalRead(BottomA) == LOW)
    {
        delay(10);
        if (digitalRead(BottomA) == LOW)
  
        {
            
            
            strip.SetPixelColor(16, num1);
            strip.SetPixelColor( 7, num2);
            strip.SetPixelColor(18, num3);
            strip.Show();
        }
        else
        {
        int i;
        Serial.println("Turn Off");
        for (i = 0; i <= PixelCount - 1; i++)
        {
            strip.SetPixelColor(i, hslBlack);
            strip.Show();
        }
        }
    } 
  }
  

程序的过程很简单，按下有三个灯亮，松开就灭。github地址