Event/Interrupt recording firmware for the Arduino DUE.

Interrupt_and_event_recorder.ino

/*
Description:
  Event/Interrupt recording firmware for the Arduino DUE.
  The firmware can record events from different detectors with sufficent precision.
  The resulting output can be recorded to calculate coincidence rates.
Usage:
  Set pins that are supposed to be used as detection interrupts. 
  Attach interrupts to those pins and give them fitting names. (See example further down) 
  Flash firmware to DUE.
  Record serial output with: https://gist.github.com/HenniOVP/3ee85aee16575391f46451dbd566b0ef
  Analyze the recorded serial output with: https://gist.github.com/HenniOVP/b48d752b523b778235a2a62b49d0a2f5
*/


int LED_pin = 13;
int PMT_pin = 12;
int SiPM_pin = 53;
int GM_pin = 26;

void printTimeAndPin(int pin, String name){
  // print when and which pin was interrupted
  unsigned long mil = millis();
  unsigned long mic = micros();
  Serial.print("T=");
  Serial.print(mil);
  Serial.print(":");
  Serial.print(mic);
  Serial.print(";P=");
  Serial.print(pin);
  Serial.print(";n=");
  Serial.println(name);
}


void setup() {
  // setup pins as interrupt pins
  pinMode(PMT_pin, INPUT); //set the interrupt pin for trigger as high impedance, probably not required
  pinMode(SiPM_pin, INPUT); //set the interrupt pin for trigger as high impedance, probably not required
  pinMode(GM_pin, INPUT); //set the interrupt pin for trigger as high impedance, probably not required
  attachInterrupt(digitalPinToInterrupt(PMT_pin), [=] () {printTimeAndPin(PMT_pin, "PMT");}, RISING);
  attachInterrupt(digitalPinToInterrupt(SiPM_pin), [=] () {printTimeAndPin(SiPM_pin, "SiPM");}, RISING);
  attachInterrupt(digitalPinToInterrupt(GM_pin), [=] () {printTimeAndPin(GM_pin, "GM");}, RISING);
  
  // led pin
  pinMode(LED_pin, OUTPUT);
  
  //setup the serial for debug
  //Serial.begin(9600);
  // increase baud rate to handle serial prints faster
  // this as well decreases the chance of interrupt collisions
  Serial.begin(115200);
  
  
}


void loop() {
  // blink to show activity
  delay(100);
  digitalWrite(LED_pin, HIGH);
  delay(50);
  digitalWrite(LED_pin, LOW);
}