 
 volatile unsigned long long PICcount;  //volatile because in ISR
 
-//unsigned long long PICstop;  // duplicates one inside the TDC class. Confusing.
 unsigned long long ts;
 unsigned long long tof;
 unsigned long totalize = 0;

  unsigned long value = 0;

  // CSB needs to be toggled between 24-bit register reads

  SPI.beginTransaction(SPISettings(20000000, MSBFIRST, SPI_MODE0));
  digitalWrite(CSB, LOW);



  sprintf(str,"%ld.",sec), Serial.print(str);
  sprintf(str, "%06ld", frach), Serial.print(str);
  sprintf(str, "%06ld", fracl), Serial.print(str);  
} 


