/*This uses a function to grab a value from a 16 pin Analog Multiplexer
http://www.sparkfun.com/commerce/product_info.php?products_id=9056
to retrieve a value from one of the registers.
To use: analogExtRead(analogpin, multiplexerpin);
This can be expanded to use diffrent digital pins as well.
*/

int digipin[] = {2, 3, 4, 5};

int analogExtRead(int analogpin, int multiplexerpin)
{
  for(int i = 0; i < 3; i++)
  {
    digitalWrite(digipin[i], bitRead(multiplexerpin, i));
  }
  return analogRead(analogpin);
}

void loop() {}
void setup() {}