   return 0;
 }
 
+// Callback when the CBL2 class notices the attached calculator
+// wants to start a Get() exchange. The CBL2 class needs to get
+// any data to send before continuing the exchange.
 int onSendAsCBL2(uint8_t type, enum Endpoint model, int* headerlen,
                  int* datalen, data_callback* data_callback)
 {

  Serial.print(type);
  Serial.print(" from endpoint of type ");
  Serial.println((int)model);
  return -1;
}
const int lineRed = DEFAULT_TIP;
const int lineWhite = DEFAULT_RING;

// Specify the number of LEDs to control, and to which
// digital pin each LED is attached.
#if defined(__MSP432P401R__)		// MSP432 target
#define LED_PIN_COUNT 4
const int ledPins[LED_PIN_COUNT] = {78, 75, 76, 77};
