test trigger for latency rig

latency_measure_trigger_test.ino

//Trigger tester:

// use with eso32 lolin d32 pro, but can be adapted for any other

// emits T0 for pin 12
// emits T1 for pin 13 at slightly increasing delays of 100ms
// emits T2 for pin 14 at slightly decreasing delays of 100ms

#define PIN_T0 12
#define PIN_T1 13
#define PIN_T2 14

void setup() {
  // put your setup code here, to run once:
  pinMode(PIN_T0, OUTPUT);
  pinMode(PIN_T1, OUTPUT);
  pinMode(PIN_T2, OUTPUT);
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(PIN_T0, LOW);
  digitalWrite(PIN_T1, LOW);
  digitalWrite(PIN_T2, LOW);
  for (int i = 0; i < 10; i++) {
    digitalWrite(LED_BUILTIN, HIGH);
    delay(100);
    digitalWrite(LED_BUILTIN, LOW);
    delay(100);
  }
}

int delayCntr1 = 0;
int delayCntr2 = 20;

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(LED_BUILTIN, LOW);
  digitalWrite(PIN_T0, HIGH);
  digitalWrite(PIN_T1, LOW);
  digitalWrite(PIN_T2, LOW);
  delay(100 + delayCntr1);
  digitalWrite(PIN_T0, LOW);
  digitalWrite(PIN_T1, HIGH);
  digitalWrite(PIN_T2, LOW);
  delay(100 + delayCntr2);
  
  digitalWrite(PIN_T0, LOW);
  digitalWrite(PIN_T1, LOW);
  digitalWrite(PIN_T2, HIGH);
  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000);

  delayCntr1 += 2;
  delayCntr2 -= 2;
  if (delayCntr1 >= 20)
    delayCntr1 = 0;
  if (delayCntr2 < 0)
    delayCntr2 = 20;

}