[問題] 關於編碼器程式碼一問ARDUINO

看板C_and_CPP (C/C++)作者sbk8027 (sbk8027)時間12年前 (2013/08/13 23:59)推噓0(0推 0噓 0→)

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各位板上大大大家好小弟之前友發問過ARDUINO來撰寫編碼器再次付上編碼器網址 http://www.shayye.com.tw/pdf/Magnetic-Encoders.pdf 這次改用別種寫法如下 #define ENCODER_A_PIN 2 #define ENCODER_B_PIN 3 long position; void setup() { Serial.begin(19200); Serial.println("Started"); pinMode(ENCODER_A_PIN, INPUT); pinMode(ENCODER_B_PIN, INPUT); attachInterrupt(0, read_quadrature, CHANGE); } void loop() { Serial.print("Position: "); Serial.println(position, DEC); delay(1000); } void read_quadrature() { // found a low-to-high on channel A if (digitalRead(ENCODER_A_PIN) == HIGH) { // check channel B to see which way if (digitalRead(ENCODER_B_PIN) == LOW) position++; else position--; } // found a high-to-low on channel A else { // check channel B to see which way if (digitalRead(ENCODER_B_PIN) == LOW) position--; else position++; } } 是有跑出來數值如下 Started Position: 0 Position: 0 Position: 0 Position: 0 Position: 0 Position: 0 Position: 0 Position: -82通電後 Position: -168 Position: -219 Position: -302 Position: -388 Position: -428 Position: -548 Position: -621 Position: -707 Position: -796 Position: -890 Position: -978 Position: -1058 Position: -1144 Position: -1210斷電後 Position: -1210 Position: -1210 Position: -1210 Position: -1210 但數值相當奇怪是負值且沒有一個規律性想請問是哪裡出了問題訊號輸出電路我是照PDF檔中電路去接的採用TWO CHNNEL 然後ARDUINO UNO的PIN2拉到A&B 麻煩各位大大了 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.233.40.22