MEL PICBASIC Forum - New approach to Rotary Encoder

  • New approach to Rotary Encoder

    by
    Ioannis
    Published on - 26th April 2010 20:27  Number of Views: 13988  
    Here is an experiment on Rotary Encoders and a different approach than the standard XOR way.

    Code:
    loop:
if portb.1=0 then                 'here is switch 1 of the rotary encoder
    counter=counter+1
    goto lcd
endif
 
if portb.0=0 then                 'here is switch 2 of the rotary encoder
    counter=counter-1
    goto lcd
endif
 
goto loop
 
lcd:
lcdout $fe,$c0,dec5 counter
while (portb.0=0 or portb.1=0):pause 10:wend
goto loop
    The key is the last While/Wend command where it checks for the next pulse comming after the first edge of either switch of the encoder.

    Common of the encoder is Low and Pull Up is supposed to be active.

    Ioannis
    This article was originally published in forum thread: New approach to Rotary Encoder started by Ioannis View original post