SPI question

This seems to have fixed the fault reporting issue.

exports.connect = function(spi,cs) {
  return new MAX31855(spi,cs);
};


function MAX31855(spi,cs) {
  this.spi=spi;
  this.cs=cs;
}
MAX31855.prototype.getTemp = function () {
  var d = this.spi.send("\0\0\0\0",this.cs); 
  var trtn={};
  trtn.temp=(d.charCodeAt(0)<<6 | d.charCodeAt(1)>>2)*0.25;
  if (d.charCodeAt(1) & 1)  {
    var fault = (d.charCodeAt(3) & 7);
    switch (fault) {
      case 1:
        return trtn.fault="No probe detected";

      case 3:
        return trtn.fault="Probe shorted to Ground";
 
      case 4:
        return trtn.fault="Probe shorted to VCC";
 
      default:
       return  trtn.fault=fault;
    }
  }
    else{

  return trtn;
    }};