基于PWM的三基色LED的调光调色

准备啃这个论文基于PWM的三基色LED的调光调色方法，并找了相关产品，市面有yeelight的可调LED灯，买了适用Arduino的RGB LED，颜色值是0-255，当好Arduino的PWM的值也是0-255，我就认为其是一一对应的了。按照色温所对及应的RGB颜色表，循环从最小色温到最大色温，效果图如下：

IMG_2237-min.gif

有几个问题所在：

1. 配色的时候看有些颜色看起来不是太正，有偏色现象，从论文可以看出来，偏色的原因较多，LED温度不一样时，相同的电压值下也会有不同的颜色值；
2. 色温如果要准确测量，需要使用色温测试仪，大概2.5K大洋；
3. 代码如下：

unsigned long colorT[] = {
  0xff3300,0xff3800,0xff4500,0xff4700,0xff5200,0xff5300,0xff5d00,0xff5d00,0xff6600,0xff6500,
  0xff6f00,0xff6d00,0xff7600,0xff7300,0xff7c00,0xff7900,0xff8200,0xff7e00,0xff8700,0xff8300,
  0xff8d0b,0xff8912,0xff921d,0xff8e21,0xff9829,0xff932c,0xff9d33,0xff9836,0xffa23c,0xff9d3f,
  0xffa645,0xffa148,0xffaa4d,0xffa54f,0xffae54,0xffa957,0xffb25b,0xffad5e,0xffb662,0xffb165,
  0xffb969,0xffb46b,0xffbd6f,0xffb872,0xffc076,0xffbb78,0xffc37c,0xffbe7e,0xffc682,0xffc184,
  0xffc987,0xffc489,0xffcb8d,0xffc78f,0xffce92,0xffc994,0xffd097,0xffcc99,0xffd39c,0xffce9f,
  0xffd5a1,0xffd1a3,0xffd7a6,0xffd3a8,0xffd9ab,0xffd5ad,0xffdbaf,0xffd7b1,0xffddb4,0xffd9b6,
  0xffdfb8,0xffdbba,0xffe1bc,0xffddbe,0xffe2c0,0xffdfc2,0xffe4c4,0xffe1c6,0xffe5c8,0xffe3ca,
  0xffe7cc,0xffe4ce,0xffe8d0,0xffe6d2,0xffead3,0xffe8d5,0xffebd7,0xffe9d9,0xffedda,0xffebdc,
  0xffeede,0xffece0,0xffefe1,0xffeee3,0xfff0e4,0xffefe6,0xfff1e7,0xfff0e9,0xfff3ea,0xfff2ec,
  0xfff4ed,0xfff3ef,0xfff5f0,0xfff4f2,0xfff6f3,0xfff5f5,0xfff7f5,0xfff6f8,0xfff8f8,0xfff8fb,
  0xfff9fb,0xfff9fd,0xfff9fd,0xfef9ff,0xfefaff,0xfcf7ff,0xfcf8ff,0xf9f6ff,0xfaf7ff,0xf7f5ff,
  0xf7f5ff,0xf5f3ff,0xf5f4ff,0xf3f2ff,0xf3f3ff,0xf0f1ff,0xf1f1ff,0xeff0ff,0xeff0ff,0xedefff,
  0xeeefff,0xebeeff,0xeceeff,0xe9edff,0xeaedff,0xe7ecff,0xe9ecff,0xe6ebff,0xe7eaff,0xe4eaff,
  0xe5e9ff,0xe3e9ff,0xe4e9ff,0xe1e8ff,0xe3e8ff,0xe0e7ff,0xe1e7ff,0xdee6ff,0xe0e6ff,0xdde6ff,
  0xdfe5ff,0xdce5ff,0xdde4ff,0xdae4ff,0xdce3ff,0xd9e3ff,0xdbe2ff,0xd8e3ff,0xdae2ff,0xd7e2ff,
  0xd9e1ff,0xd6e1ff,0xd8e0ff,0xd4e1ff,0xd7dfff,0xd3e0ff,0xd6dfff,0xd2dfff,0xd5deff,0xd1dfff,
  0xd4ddff,0xd0deff,0xd3ddff,0xcfddff,0xd2dcff,0xcfddff,0xd1dcff,0xcedcff,0xd0dbff,0xcddcff,
  0xcfdaff,0xccdbff,0xcfdaff,0xcbdbff,0xced9ff,0xcadaff,0xcdd9ff,0xc9daff,0xccd8ff,0xc9d9ff,
  0xccd8ff,0xc8d9ff,0xcbd7ff,0xc7d8ff,0xcad7ff,0xc7d8ff,0xcad6ff,0xc6d8ff,0xc9d6ff,0xc5d7ff,
  0xc8d5ff,0xc4d7ff,0xc8d5ff,0xc4d6ff,0xc7d4ff,0xc3d6ff,0xc6d4ff,0xc3d6ff,0xc6d4ff,0xc2d5ff,
  0xc5d3ff,0xc1d5ff,0xc5d3ff,0xc1d4ff,0xc4d2ff,0xc0d4ff,0xc4d2ff,0xc0d4ff,0xc3d2ff,0xbfd3ff,
  0xc3d1ff,0xbfd3ff,0xc2d1ff,0xbed3ff,0xc2d0ff,0xbed2ff,0xc1d0ff,0xbdd2ff,0xc1d0ff,0xbdd2ff,
  0xc0cfff,0xbcd2ff,0xc0cfff,0xbcd1ff,0xbfcfff,0xbbd1ff,0xbfceff,0xbbd1ff,0xbeceff,0xbad0ff,
  0xbeceff,0xbad0ff,0xbeceff,0xb9d0ff,0xbdcdff,0xb9d0ff,0xbdcdff,0xb9cfff,0xbccdff,0xb8cfff,
  0xbcccff,0xb8cfff,0xbcccff,0xb7cfff,0xbbccff,0xb7ceff,0xbbccff,0xb7ceff,0xbbcbff,0xb6ceff,
  0xbacbff,0xb6ceff,0xbacbff,0xb6cdff,0xbacbff,0xb5cdff,0xb9caff,0xb5cdff,0xb9caff,0xb5cdff,
  0xb9caff,0xb4cdff,0xb8caff,0xb4ccff,0xb8c9ff,0xb4ccff,0xb8c9ff,0xb3ccff,0xb8c9ff,0xb3ccff,
  0xb7c9ff,0xb3ccff,0xb7c9ff,0xb2cbff,0xb7c8ff,0xb2cbff,0xb6c8ff,0xb2cbff,0xb6c8ff,0xb2cbff,
  0xb6c8ff,0xb1cbff,0xb6c8ff,0xb1caff,0xb5c7ff,0xb1caff,0xb5c7ff,0xb1caff,0xb5c7ff,0xb0caff,
  0xb5c7ff,0xb0caff,0xb4c7ff,0xb0caff,0xb4c6ff,0xafc9ff,0xb4c6ff,0xafc9ff,0xb4c6ff,0xafc9ff,
  0xb3c6ff,0xafc9ff,0xb3c6ff,0xafc9ff,0xb3c6ff,0xaec9ff,0xb3c5ff,0xaec9ff,0xb3c5ff,0xaec8ff,
  0xb2c5ff,0xaec8ff,0xb2c5ff,0xadc8ff,0xb2c5ff,0xadc8ff,0xb2c5ff,0xadc8ff,0xb2c4ff,0xadc8ff,
  0xb1c4ff,0xadc8ff,0xb1c4ff,0xacc7ff,0xb1c4ff,0xacc7ff,0xb1c4ff,0xacc7ff,0xb1c4ff,0xacc7ff,
  0xb0c4ff,0xacc7ff,0xb0c3ff,0xabc7ff,0xb0c3ff,0xabc7ff,0xb0c3ff,0xabc7ff,0xb0c3ff,0xabc6ff,
//  0xb0c3ff,0xabc6ff,0xafc3ff,0xaac6ff,0xafc3ff,0xaac6ff,0xafc2ff,0xaac6ff,0xafc2ff,0xaac6ff,
//  0xafc2ff,0xaac6ff,0xafc2ff,0xaac6ff,0xaec2ff,0xa9c6ff,0xaec2ff,0xa9c5ff,0xaec2ff,0xa9c5ff,
//  0xaec2ff,0xa9c5ff,0xaec2ff,0xa9c5ff,0xaec1ff,0xa9c5ff,0xaec1ff,0xa9c5ff,0xadc1ff,0xa8c5ff,
//  0xadc1ff,0xa8c5ff,0xadc1ff,0xa8c5ff,0xadc1ff,0xa8c5ff,0xadc1ff,0xa8c4ff,0xadc1ff,0xa8c4ff,
//  0xadc1ff,0xa8c4ff,0xadc0ff,0xa7c4ff,0xacc0ff,0xa7c4ff,0xacc0ff,0xa7c4ff,0xacc0ff,0xa7c4ff,
//  0xacc0ff,0xa7c4ff,0xacc0ff,0xa7c4ff,0xacc0ff,0xa7c4ff,0xacc0ff,0xa6c4ff,0xacc0ff,0xa6c3ff,
//  0xabc0ff,0xa6c3ff,0xabc0ff,0xa6c3ff,0xabbfff,0xa6c3ff,0xabbfff,0xa6c3ff,0xabbfff,0xa6c3ff,
//  0xabbfff,0xa6c3ff,0xabbfff,0xa5c3ff,0xabbfff,0xa5c3ff,0xabbfff,0xa5c3ff,0xaabfff,0xa5c3ff,
//  0xaabfff,0xa5c3ff,0xaabfff,0xa5c3ff,0xaabfff,0xa5c2ff,0xaabeff,0xa5c2ff,0xaabeff,0xa5c2ff,
//  0xaabeff,0xa4c2ff,0xaabeff,0xa4c2ff,0xaabeff,0xa4c2ff,0xaabeff,0xa4c2ff,0xa9beff,0xa4c2ff,
//  0xa9beff,0xa4c2ff,0xa9beff,0xa4c2ff,0xa9beff,0xa4c2ff,0xa9beff,0xa4c2ff,0xa9beff,0xa4c2ff,
//  0xa9beff,0xa3c2ff,0xa9beff,0xa3c2ff,0xa9bdff,0xa3c1ff,0xa9bdff,0xa3c1ff,0xa9bdff,0xa3c1ff,
//  0xa8bdff,0xa3c1ff,0xa8bdff,0xa3c1ff,0xa8bdff,0xa3c1ff,0xa8bdff,0xa3c1ff,0xa8bdff,0xa3c1ff,
//  0xa8bdff,0xa3c1ff,0xa8bdff,0xa2c1ff,0xa8bdff,0xa2c1ff,0xa8bdff,0xa2c1ff,0xa8bdff,0xa2c1ff,
//  0xa8bdff,0xa2c1ff,0xa8bdff,0xa2c1ff,0xa7bcff,0xa2c1ff,0xa7bcff,0xa2c1ff,0xa7bcff,0xa2c0ff,
//  0xa7bcff,0xa2c0ff,0xa7bcff,0xa2c0ff,0xa7bcff,0xa2c0ff,0xa7bcff,0xa2c0ff,0xa7bcff,0xa1c0ff,
//  0xa7bcff,0xa1c0ff,0xa7bcff,0xa1c0ff,0xa7bcff,0xa1c0ff,0xa7bcff,0xa1c0ff,0xa7bcff,0xa1c0ff,
//  0xa7bcff,0xa1c0ff,0xa6bcff,0xa1c0ff,0xa6bcff,0xa1c0ff,0xa6bcff,0xa1c0ff,0xa6bbff,0xa1c0ff,
//  0xa6bbff,0xa1c0ff,0xa6bbff,0xa1c0ff,0xa6bbff,0xa1c0ff,0xa6bbff,0xa0c0ff,0xa6bbff,0xa0c0ff,
//  0xa6bbff,0xa0bfff,0xa6bbff,0xa0bfff,0xa6bbff,0xa0bfff,0xa6bbff,0xa0bfff,0xa6bbff,0xa0bfff,
//  0xa6bbff,0xa0bfff,0xa6bbff,0xa0bfff,0xa5bbff,0xa0bfff,0xa5bbff,0xa0bfff,0xa5bbff,0xa0bfff,
//  0xa5bbff,0xa0bfff,0xa5bbff,0xa0bfff,0xa5bbff,0xa0bfff,0xa5bbff,0x9fbfff,0xa5bbff,0x9fbfff,
//  0xa5baff,0x9fbfff,0xa5baff,0x9fbfff,0xa5baff,0x9fbfff,0xa5baff,0x9fbfff,0xa5baff,0x9fbfff,
//  0xa5baff,0x9fbfff,0xa5baff,0x9fbfff,0xa5baff,0x9fbfff,0xa5baff,0x9fbfff,0xa5baff,0x9fbeff,
//  0xa5baff,0x9fbeff,0xa4baff,0x9fbeff,0xa4baff,0x9fbeff,0xa4baff,0x9fbeff,0xa4baff,0x9fbeff,
//  0xa4baff,0x9fbeff,0xa4baff,0x9ebeff,0xa4baff,0x9ebeff,0xa4baff,0x9ebeff,0xa4baff,0x9ebeff,
//  0xa4baff,0x9ebeff,0xa4baff,0x9ebeff,0xa4baff,0x9ebeff,0xa4baff,0x9ebeff,0xa4baff,0x9ebeff,
//  0xa4b9ff,0x9ebeff,0xa4b9ff,0x9ebeff,0xa4b9ff,0x9ebeff,0xa4b9ff,0x9ebeff,0xa4b9ff,0x9ebeff,
//  0xa4b9ff,0x9ebeff,0xa4b9ff,0x9ebeff,0xa3b9ff,0x9ebeff,0xa3b9ff,0x9ebeff,0xa3b9ff,0x9ebeff,
//  0xa3b9ff,0x9ebeff,0xa3b9ff,0x9ebeff,0xa3b9ff,0x9dbeff,0xa3b9ff,0x9dbeff,0xa3b9ff,0x9dbdff,
//  0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,
//  0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,
//  0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,0xa3b9ff,0x9dbdff,
//  0xa3b8ff,0x9dbdff,0xa3b8ff,0x9dbdff,0xa2b8ff,0x9dbdff,0xa2b8ff,0x9dbdff,0xa2b8ff,0x9dbdff,
//  0xa2b8ff,0x9dbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,
//  0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,
//  0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,
//  0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbdff,0xa2b8ff,0x9cbcff,0xa2b8ff,0x9cbcff,0xa2b8ff,0x9cbcff,
//  0xa2b8ff,0x9cbcff,0xa2b8ff,0x9cbcff,0xa2b8ff,0x9cbcff,0xa2b8ff,0x9cbcff,0xa2b8ff,0x9cbcff,
//  0xa2b8ff,0x9cbcff,0xa2b8ff,0x9cbcff,0xa2b8ff,0x9cbcff,0xa1b8ff,0x9cbcff,0xa1b8ff,0x9bbcff,
//  0xa1b8ff,0x9bbcff,0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,
//  0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,
//  0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,0xa1b7ff,0x9bbcff,
//  0xa1b7ff,0x9bbcff,
};



int redPin= 11;
int greenPin = 10;
int bluePin = 9;

#define GREEN_MIN 51
#define BLUE_MIN 11
int red = 0;
int green = 0;
int blue = 0;
int i = 0;
int l = sizeof (colorT);

void setup() {
  pinMode(12, OUTPUT);
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  digitalWrite(12, LOW);
}

void loop() {
  red = (colorT[i] >> 16) & 0xff;
  green  = (colorT[i] >> 8) & 0xff;
  blue  = (colorT[i] >> 0) & 0xff;
  setColor(red, green, blue);
  i++;
  if (i >= l) {
    i = 0;
  }
  delay(200);
}

void setColor(int redValue, int greenValue, int blueValue) {
  analogWrite(redPin, redValue);
  analogWrite(greenPin, greenValue);
  analogWrite(bluePin, blueValue);
}

只为留下一些残留的记忆。
《完》