#include <SPI.h>
#define CS 17
#define LDAC 16
SPISetting MCP4922(20000000,MSBFIRST,SPI_MODE0);
void setup() {
 pinMode(CS, OUTPUT);
 pinMode(LDAC, OUTPUT);
 digitalWrite(CS, HIGH);
 digitalWrite(LDAC, HIGH);

 SPI.begin();
 SPI.beginTransaction(MPC4922);
 digitalWrite(CS, LOW);
 SPI.transfer16(0x38BB);   //OUTA 1.8 V
 delay(5);
 digitalWrite(LDAC, LOW);
 delay(5);
 digitalWrite(LDAC, HIGH);
 digitalWrite(CS, HIGH);
 SPI.endTransaction();
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}