tcs34725

/*!
 * @file colorview.ino
 * @brief DFRobot's Color Sensor
 * @n [Get the module here]
 * @n This example read current R,G,B,C value by the IIC bus
 * @n [Connection and Diagram](http://wiki.dfrobot.com.cn/index.php?title=(SKU:SEN0212)Color_Sensor-TCS34725_%E9%A2%9C%E8%89%B2%E4%BC%A0%E6%84%9F%E5%99%A8)
 *
 * @copyright  [DFRobot](http://www.dfrobot.com), 2016
 * @copyright GNU Lesser General Public License
 *
 * @author [carl](carl.xu@dfrobot.com)
 * @version  V1.0
 * @date  2016-07-12
 */
#include <Wire.h>
#include "DFRobot_TCS34725.h"

// Pick analog outputs, for the UNO these three work well
// use ~560  ohm resistor between Red & Blue, ~1K for green (its brighter)
#define redpin 3
#define greenpin 5
#define bluepin 6
// for a common anode LED, connect the common pin to +5V
// for common cathode, connect the common to ground

// set to false if using a common cathode LED
#define commonAnode false

// our RGB -> eye-recognized gamma color
byte gammatable[256];

DFRobot_TCS34725 tcs = DFRobot_TCS34725(TCS34725_INTEGRATIONTIME_50MS, TCS34725_GAIN_4X);
void setup() {
  Serial.begin(115200);
  Serial.println("Color View Test!");

  if (tcs.begin()) {
    Serial.println("Found sensor");
  } else {
    Serial.println("No TCS34725 found ... check your connections");
    while (1); // halt!
  }
  // use these three pins to drive an LED
  pinMode(redpin, OUTPUT);
  pinMode(greenpin, OUTPUT);
  pinMode(bluepin, OUTPUT);
  
  // thanks PhilB for this gamma table!
  // it helps convert RGB colors to what humans see
  for (int i=0; i<256; i++) {
    float x = i;
    x /= 255;
    x = pow(x, 2.5);
    x *= 255;
      
    if (commonAnode) {
      gammatable[i] = 255 - x;
    } else {
      gammatable[i] = x;      
    }
    //Serial.println(gammatable[i]);
  }
}

void loop() {
  uint16_t clear, red, green, blue;
  tcs.getRGBC(&red, &green, &blue, &clear);
  tcs.lock();  // turn off LED
  Serial.print("C:\t"); Serial.print(clear);
  Serial.print("\tR:\t"); Serial.print(red);
  Serial.print("\tG:\t"); Serial.print(green);
  Serial.print("\tB:\t"); Serial.print(blue);
  Serial.println("\t");
  
  // Figure out some basic hex code for visualization
  uint32_t sum = clear;
  float r, g, b;
  r = red; r /= sum;
  g = green; g /= sum;
  b = blue; b /= sum;
  r *= 256; g *= 256; b *= 256;
  Serial.print("\t");
  Serial.print((int)r, HEX); Serial.print((int)g, HEX); Serial.print((int)b, HEX);
  Serial.println();

  //Serial.print((int)r ); Serial.print(" "); Serial.print((int)g);Serial.print(" ");  Serial.println((int)b );
  //Set the color lamp
  analogWrite(redpin, gammatable[(int)r]);
  analogWrite(greenpin, gammatable[(int)g]);
  analogWrite(bluepin, gammatable[(int)b]);
}