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AC?v???[?u??Arduino?̐ڑ?

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 1:// AC Frequency measurement
 2:volatile unsigned long now,prev,counter=0; 
 3:void setup() {
 4: pinMode(2, INPUT_PULLUP);
 5: attachInterrupt(digitalPinToInterrupt(2), count, FALLING);
 6: Serial.begin(9600);
 7:}
 8:
 9:void loop() {
10: if (counter==0){
11:    Serial.println(now-prev);
12:    prev = now;
13:    delay(20);
14:    }
15:  }
16:
17:void count(){
18:  counter++;
19:  if (counter==3600) { 
20:    now=micros();
21:    counter=0;
22:   }
23:  }

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?@17?`23?s?ڂ܂ł?count?֐??ł??B????͊??荞?݂??????????Ƃ??ɌĂяo?????֐??ł??B

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?@?ȏオ???荞?ݎ??ɍs???????ɂȂ?܂??B

?@???āA9?s?ڂ????loop?֐??ɂ??ǂ?܂??B

?@10?`14?s?ڂ?if???̃N???[?Y?ƂȂ?܂??B

?@11?s?ڂŁA????counter?̒l??0?Ȃ?A???荞?݊֐????ŋL?^???????̎??_?̎??Ԃ???O??̊??荞?݂????????????Ԃ̍???????Ă??̒l??PC???ɑ??M???܂??B

?@12?s?ڂ?prev?ϐ??Ɋ??荞?ݔ??????̎??ԁinow?j???????܂??B

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