Für meine Bastelei habe ich bei Polin Panasonic Encoder eingekauft.
Ich war richtig enttäuscht, das keine Library auf Arduino Seite mit diesem Encoder richtig laufen kann. Ich habe meinen eigenen Library geschrieben.
Ich hoffe es wird für andere auch nützlich sein.
/*
Pan_Encoder_ABC.cpp - A library for reading Encoder PANASONIC EVEQDBRL416B.
Copyright 2012 Andrew Buckin(aka, "ka_ru"), except for the code at the end marked
"The following was taken from the Arduino's code." That portion is copyright by
Andrew Buckin and is distributed under the GNU Lesser General Public License 2.1
or any subsequent version.
For those portions Copyright by Andrew Buckin, the following license applies.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Questions? Send mail to ka_ru2003@msn.com
*/
#include <PinChangeInt.h>
enum PinAssignments {
encoderPinA = A2, // rigth
encoderPinB = A3, // left
clearButton = 8 // another two pins
};
volatile unsigned int encoderPos = 100; // a counter for the dial
unsigned int lastReportedPos = 1; // change management
static boolean rotating=false; // debounce management
// interrupt service routine vars
volatile boolean ABc = false;
volatile boolean BBc = false;
volatile boolean AAc = false;
volatile boolean BAc = false;
int8_t clicks = 0; // Counter to indicate cumulative clicks in either direction
int8_t direction = NULL; // indicator
int8_t enc = NULL; // indicator
void setup() {
pinMode(encoderPinA, INPUT);
pinMode(encoderPinB, INPUT);
pinMode(clearButton, INPUT);
// turn on pullup resistors
digitalWrite(encoderPinA, HIGH);
digitalWrite(encoderPinB, HIGH);
digitalWrite(clearButton, HIGH);
PCintPort::attachInterrupt(encoderPinA, &doEncoderA, CHANGE);
PCintPort::attachInterrupt(encoderPinB, &doEncoderB, CHANGE);
Serial.begin(9600); // output
}
// main loop, work is done by interrupt service routines, this one only prints stuff
void loop() {
rotating = true; // reset the debouncer
if (direction != NULL){
enc = !NULL;
if (direction > 0) clicks++;
else clicks--;
direction = NULL;
}
if (enc != NULL) {
Serial.print("Index:");
Serial.println(encoderPos + clicks, DEC);
enc = NULL;
}
if (digitalRead(clearButton) == LOW ) {
encoderPos = 0;
}
}
// Interrupt on A changing state
void doEncoderA(){
//delayMicroseconds(50);
AAc = digitalRead(encoderPinA);
BAc = digitalRead(encoderPinB);
if (!ABc && AAc && !BBc && !BAc){direction=1;}
if (ABc && !AAc && BBc && BAc){direction=1;}
if (!ABc && AAc && BBc && BAc){direction=-1;}
if (ABc && !AAc && !BBc && !BAc){direction=-1;}
}
// Interrupt on B changing state
void doEncoderB(){
//delayMicroseconds(50);
ABc = digitalRead(encoderPinA);
BBc = digitalRead(encoderPinB);
}
