Belated ColorPal Post

//Dr. Bogen, sorry about not having this on by the 5th, we were looking through and realized it wasn't on.  This was the version that I found, just wanted to make sure you knew we'd done it! Thanks, Jason and Theresa

/*====================================================

 / Connect ColorPAL SIG signal to Arduino pin 2 and 3

 / Add 2K pullup resistor from pins 2 & 3 to +5v

 / Baud Rate = 9600 kbps

 / Read signal on 9600 in HEX

 /====================================================*/

#include <OldSoftwareSerial.h>

OldSoftwareSerial Color90(2, 3);  // rx = 2, tx = 3

float red; 

float grn; 

float blu; 

float wr = 240;

float wg = 191;

float wb = 318;

float br = 22;

float bg = 21;

float bb = 33;

int gotcolor = 0;

int letter;

void setup()

{

  Serial.begin(9600); // Start communication with serial port read value

  Color90.begin(4800); // Send signal to led to read value

  pinMode(2,INPUT); // serial pin out from color pal

  pinMode(3,INPUT); // from same serial pin, signal pulls up, sends, pulls down, reads

  digitalWrite(2,HIGH); // Enable the pull-up resistor

  digitalWrite(3,HIGH); // Enable the pull-up resistor

  pinMode(2,OUTPUT); // send signal out

  pinMode(3,OUTPUT);

  digitalWrite(2,LOW); // turn pin off so pin 3 can go high

  digitalWrite(3,LOW);

  pinMode(2,INPUT); // Input signal to print

  pinMode(3,INPUT);

  

  Serial.println("Pass 1");

//  delay(20);

  while( digitalRead(2) != HIGH || digitalRead(3) != HIGH ) {

    Serial.println("In the loop");

    delay(50);

  }

  Serial.println("Pass 2");

  pinMode(2,OUTPUT);

  pinMode(3,OUTPUT);

  digitalWrite(2,LOW);

  digitalWrite(3,LOW);

  delay(100);     // spec is 80, but not all ColorPAL units work with 80

  pinMode(2,INPUT);

  pinMode(3,OUTPUT);

  delay(100); 

}

// This oscillates back and forth on one wire to turn off led, send signal,

// turn on led, read signal. very fast strobe read - arduino is not capable of

// one wire signal communication over digital ports, so this is a way around

// that over 2 wires communicating with 1 pin on the sensor.

//---------------------------------

void loop()

{

  readcolor();

  float R = (red-br)/(wr-br);

  float G = (grn-bg)/(wg-bg);

  float B = (blu-bb)/(wb-bb);

  Serial.print("R");

  Serial.print(R);

  Serial.print("   G");

  Serial.print(G);

  Serial.print("   B");

  Serial.println(B);

  

  if (R < .15 && G < .15 && B < .15){

    Serial.print("Black");

    delay(50);

  }

  if((R > .85 && G > .85 && B > .85){

    Serial.print("White");

    delay(50);

  }

  if((R>.15 && R <.85) && G<.15 && B <.15){

  Serial.print("Red");

  delay(50);

  }

  if((B>.15 && B <.85) && R<.15 && B <.15){

  Serial.print("Blue");

  delay(50);

  }

  if((G>.15 && G <.85) && R<.15 && B <.15){

  Serial.print("Green");

  delay(50);

  }

  if((G>.15 && G <.85) &&(R>.15 && R <.85) && B <.15){

  Serial.print("Yellow");

  delay(50);

  }

  if((G>.15 && G <.85) &&(B>.15 && B <.85) && R <.15){

  Serial.print("Cyan");

  delay(50);

  }

  if((R>.15 && R <.85) &&(B>.15 && B <.85) && G <.15){

  Serial.print("Magenta");

  delay(50);

  }

  gotcolor = 0;

  delay(50);

}

void readcolor() {  // Reads ColorPAL, putting results in the red,grn,blu variables

  char rByte[9];

  char dummy[4];

  delay(20);

  Color90.begin(4800);

 Color90.print("= (00 $ m) !");  // set up loop to continuously send color data

  pinMode(3,INPUT);

  gotcolor = 0;

  while (gotcolor == 0) {

    rByte[0] = Color90.read();

    if( rByte[0] == '$' ) {

      gotcolor = 1;

      for(int i=0; i<9; i++) {

        rByte[i] = Color90.read();

//        Serial.print(rByte[i]);

      }

      Serial.println("");

      dummy[0] = rByte[0];

      dummy[1] = rByte[1];

      dummy[2] = rByte[2];

      dummy[3] = 0;

      red = strtol(dummy,NULL,16);

      dummy[0] = rByte[3];

      dummy[1] = rByte[4];

      dummy[2] = rByte[5];

      grn = strtol(dummy,NULL,16);

      dummy[0] = rByte[6];

      dummy[1] = rByte[7];

      dummy[2] = rByte[8];

      blu = strtol(dummy,NULL,16); 

    }

  }

}