Short SPI controlled DAC demo with MCP4921

I wanted to generate an analog signal so I read through several of the DAC solutions here. I've used SPI commands before so the MCP4921 seemed like an easy solution. The demo's I read seemed like they were heavier than they needed to be just to teach someone how to generate a DAC signal. They are good write ups, but I just wanted to do my own twist on it. So here it is.

I wrote this up fairly quickly and will probably make updates. Criticism welcome.

[quote author=code from the site]#include
const int chipSelectPin = 10;
const int analogInPin = A0;
int sensorValue = 0;
int outputValue = 0;
byte outputValueByte0 = 0;
byte outputValueByte1 = 0;

void setup()
pinMode(chipSelectPin, OUTPUT);
digitalWrite(chipSelectPin, HIGH);

void loop()
sensorValue = analogRead(analogInPin);
outputValue = map(sensorValue, 0, 1023, 0, 4095);
outputValueByte0 = byte(outputValue);
outputValue = outputValue >> 8;
outputValueByte1 = byte(outputValue | 0b00110000);

digitalWrite(chipSelectPin, LOW);
digitalWrite(chipSelectPin, HIGH);