Test code for running 2 MAX31855 Breakout Boards on a ChipKIT UNO32

MAX31855x2.pde

const int CH1 = 4;        // Channel 1 CS
const int CH2 = 5;        // Channel 2 CS 
const int mDataPin = 6;   // SO
const int mClockPin = 7;  // SCK

void setup() {
  Serial.begin(9600);
  pinMode(CH1, OUTPUT);        //CS is an Output 
  pinMode(CH2, OUTPUT);        //CS is an Output 
  pinMode(mDataPin, INPUT);    //SO is an Input
  pinMode(mClockPin, OUTPUT);  //SCK is an Output
  digitalWrite(CH1, 1);  
  digitalWrite(CH2, 1);
  digitalWrite(mClockPin, 0);
}

void loop ()
{
  // Output temperature from the two boards in the format of:   [CH1],[CH2]\n      
  // Example:   123.45,678.90\n
  Serial.print(getTemp(CH1));
  Serial.print(",");
  Serial.print(getTemp(CH2));
  Serial.print("\n");
  delay(1000); // Delay 1 seconds, so we get new readings sent to the terminal once per second
}

float getTemp(int ch)
{
 unsigned long value = 0;
 float temp = 0;
 char bita;
 digitalWrite(ch, 0);
 for (int i = 0; i < 32; i++) //Get 32 bits from the MAX31855 - see datasheet for specifics.
 {
   digitalWrite(mClockPin, 1);     //set clock pin low
   bita = digitalRead(mDataPin); 
   if (bita==1) value = value | 1; // If bit ==1 set lowest bit in value
   digitalWrite(mClockPin, 0);
   if (i != 31) value = value << 1;// If we're not done yet, shift bits left by 1 to make room for next loop
 }
 digitalWrite(ch, 1);
 value = value >> 18; //shift out all but tc temp data and sign bit
 temp = (((value * 0.25) * 9) / 5) + 32; //Convert to Degrees F
 return temp;
}