[問題] arduino寫encoder

看板C_and_CPP (C/C++)作者sbk8027 (sbk8027)時間12年前 (2013/08/11 20:58)推噓0(0推 0噓 2→)

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小弟最近在做自走車 http://www.shayye.com.tw/pdf/Magnetic-Encoders.pdf 以上是所使用的編碼器搭配ARDUINO UNO 想寫編碼器去讀編碼器的數值 int val; int encoder0PinA = 2; int encoder0PinALast = LOW; int n = LOW; void setup() { pinMode (encoder0PinA,INPUT); Serial.begin (9600); } void loop() { n = digitalRead(encoder0PinA); Serial.print (n); delay(500); } 以上是小弟的寫法,但這樣只能顯示0跟1 想請問各位TIMER要怎麼寫然後小弟爬文後修改別人的code int potpin = 0; // analog pin used to connect the potentiometer int val; // variable to read the value from the analog pin volatile byte rpmcount; unsigned int rpm; unsigned long timeold; void setup() { attachInterrupt(0, rpm_fun, RISING); rpmcount = 0; rpm = 0; timeold = 0; digitalWrite(2, HIGH); Serial.begin(9600); } void loop() { val = analogRead(potpin); // reads the value of the potentiometer (value between 0 and 1023) val = map(val, 0, 1023, 0, 179); // scale it to use it with the servo (value between 0 and 180) if (rpmcount >= 0) { rpm = 3000/(millis() - timeold)*rpmcount; timeold = millis(); rpmcount = 0; Serial.print("RPM: "); Serial.print(rpm); Serial.print("\n"); delay(1000); } } void rpm_fun() { rpmcount++; } 發現有讀道數值但跑得很快根本不知道在跑什麼只知道他數直一直跑一直跑是需要修改哪裡嗎 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.233.40.22