51 lines
1.1 KiB
Arduino
51 lines
1.1 KiB
Arduino
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#define INPUT_PIN D6 //VIN PIN FOR GEIGER COUNTER
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#define MEASUREMENT_TIME_MS 60000 //MINUTE
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#define MAX_CPM 5000 //HOW MANY COUNTS TO STORE
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unsigned long counts[MAX_CPM];
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int last_index = -1;
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//CALLBACK WHEN RADIATION PARTICLE IS DETECTED
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void IRAM_ATTR increment_counts()
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{
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counts[(++last_index) % MAX_CPM] = millis();
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}
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void setup()
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{
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//INIT counts
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for (int i = 0; i < MAX_CPM; i++) counts[i] = 0;
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Serial.begin(9600);
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//INIT PINS
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pinMode(INPUT_PIN, INPUT);
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attachInterrupt(digitalPinToInterrupt(INPUT_PIN), cb, FALLING);
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}
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int last_counts = -1;
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void loop()
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{
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unsigned long current_millis = millis();
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int current_counts = 0;
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//COUNT
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for (int i = 0; i < MAX_CPM; i++)
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{
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if (counts[i] == 0) continue;
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if (current_millis - counts[i] >= MEASUREMENT_TIME_MS) //REMOVE COUNTS OLDER THAN MEASUREMENT_TIME_MS
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{
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counts[i] = 0;
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continue;
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}
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current_counts++; //COUNT RECENT
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}
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if (last_counts != current_counts) //PRINT CPM IF CHANGED
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{
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last_counts = current_counts;
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Serial.println(String(current_counts) + " CPM");
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}
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}
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