blah.cpp

void loop() {
  ritval = analogRead(ritPin);
  cwoffset = digitalRead(4);
 
  unsigned long vfo = freq; // Start with the dial frequency
  if (cwoffset) {
    vfo += 800; // +800Hz CW shift
  }
 
  vfo += (ritval - 512) * 10; // About a +/- 5kHz range
 
  if (vfo != freqOld) {
    AD9833setFrequency(vfo, SINE);
    freqOld = vfo;
  }
  // That's all, folks
}