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//plug the Cosmic Pi Analogue PCB in to the arduino directly, make sure you've disconnected the VBias pin and powered the SiPM's
//via an alternative power supply
//This code reads A1 and A3 in free running mode. If the values are higher than threshold, it outputs the cumulative number of events
//and the time since the last event in milliseconds.
//the commented out part at the bottom can be used to output the actual data and is what we've been using to make some plots.
//this whole thing runs in a loop and is a long way from true realtime.
//J. Devine 29/08/16
uint16_t bufa[5000]; // 4 buffers of 256 readings
uint16_t bufb[5000]; // 4 buffers of 256 readings
bool firstrun = 0;
int t;
int evt; //event
void setup() {
Serial.begin(115200);
Serial.println("Alive");
int t = analogRead(0);
//int evt; //events
ADC->ADC_MR |= 0x80; // these lines set free running mode on adc 4 and adc 6 (pin A1 and A3 - see Due Pinout Diagram thread)
ADC->ADC_CR = 2;
ADC->ADC_CHER = 0x50; // this is (1<<7) | (1<<6) for adc 3 and adc 6
evt=0;
}
void loop() {
int q0 = 0, q1 = 0;
int a1, a3;
for (int i = 0; i < 5000; i++) {
while ((ADC->ADC_ISR & 0x50) != 0x50); // wait for two conversions (pin A3[4] and A1[6])
a1 = ADC->ADC_CDR[4]; // read data on A3 pin
a3 = ADC->ADC_CDR[6]; // read data on A1 pin
bufa[i] = a1;
bufb[i] = a3;
if (bufb[i] > 920) { //software trigger
if (bufa[i] > 920) { //software trigger
t=millis()-t;
Serial.print(t);Serial.print(" Trigger "); Serial.println(evt);
evt++;
t=millis();
}
}
//q0+=a1;
//q1+=a3;
}
//t = micros() - t;
//Serial.print("5000 pairs of conversions in ");Serial.print(t);Serial.println(" micros");
//Serial.print("A0 total:");Serial.println(q0);
//Serial.print("A1 total:");Serial.println(q1);
//Serial.print("A0:");Serial.println("A1:");
/*if (firstrun) {
for (int i = 0; i < 5000; i++) {
if (bufb[i] > 920) { //software trigger
if (bufa[i] > 920) { //software trigger
//evt++;
Serial.print(evt);Serial.print(" Time since last trigger ");Serial.print(t);Serial.println(" micros");
//for (int j = i - 10; j < i + 40; j++) {
// Serial.print(j); Serial.print("; "); Serial.print(bufa[j]); Serial.print("; "); Serial.print(bufb[j]); Serial.println(";");
//}
}
}
}
t=micros();
}
firstrun = 1;
*/
}
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