81 lines
2.5 KiB
Text
81 lines
2.5 KiB
Text
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uint16_t bufa; // 4 buffers of 256 readings
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uint16_t bufb; // 4 buffers of 256 readings
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bool firstrun = 0;
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int t; //time since last event
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float maxcount;
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float slowfreq; //second frequency measure,
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//int f;
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int evt; //event
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void setup() {
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Serial.begin(115200);
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Serial.println("Cosmic Pi Status: Alive");
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int t = analogRead(0);
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pinMode(13, OUTPUT);
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//int evt; //events
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ADC->ADC_MR |= 0x80; // these lines set free running mode on adc 4 and adc 6 (pin A0 and A1 - see Due Pinout Diagram thread)
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ADC->ADC_CR = 2;
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ADC->ADC_CHER = 0x50; // this is (1<<7) | (1<<6) for adc 3 and adc 6
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evt=0;
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//f = 1;
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maxcount = 0;
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}
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void loop() {
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int q0 = 0, q1 = 0;
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int a1, a3;
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//for (int i = 0; i < 5000; i++) {
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while ((ADC->ADC_ISR & 0x50) != 0x50); // wait for two conversions (pin A3[4] and A1[6])
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a1 = ADC->ADC_CDR[4]; // read data on A3 pin
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a3 = ADC->ADC_CDR[6]; // read data on A1 pin
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bufa = a1;
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bufb = a3;
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if (bufb > 600) { //software trigger threshold
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if (bufa > 600) { //software trigger threshold
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t=millis()-t;
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if (t > 0) {
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//f =((f+(1000/t))/2);
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Serial.print("Cosmic Pi coincidence trigger event. Potential cosmic rays caught so far: "); Serial.print(evt); Serial.print(". Time since last event in ms: "); Serial.print(t); Serial.print(" Frequency: ");
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//Serial.println(f);
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maxcount = maxcount + (t/1000);
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slowfreq = (1/(maxcount/evt));
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//Serial.println(maxcount);
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Serial.print(slowfreq);
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Serial.println(" Hz");
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evt++;
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t=millis();
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digitalWrite(13,HIGH);
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delay(5);
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digitalWrite(13,LOW);
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}
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}
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}
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//q0+=a1;
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//q1+=a3;
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//}
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//t = micros() - t;
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//Serial.print("5000 pairs of conversions in ");Serial.print(t);Serial.println(" micros");
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//Serial.print("A0 total:");Serial.println(q0);
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//Serial.print("A1 total:");Serial.println(q1);
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//Serial.print("A0:");Serial.println("A1:");
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/*if (firstrun) {
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for (int i = 0; i < 5000; i++) {
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if (bufb[i] > 920) { //software trigger
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if (bufa[i] > 920) { //software trigger
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//evt++;
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Serial.print(evt);Serial.print(" Time since last trigger ");Serial.print(t);Serial.println(" micros");
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//for (int j = i - 10; j < i + 40; j++) {
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// Serial.print(j); Serial.print("; "); Serial.print(bufa[j]); Serial.print("; "); Serial.print(bufb[j]); Serial.println(";");
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//}
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}
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}
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}
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t=micros();
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}
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firstrun = 1;
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*/
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}
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