Rotary Encoder on 20x4 LCD with pushbutton digit select and other features

[csantex]

For anyone interested in Richard's code example and how it works, watch the video below.
The video shows most of what the code does. Thanks for sharing Richard.

csantex

[richard]

Thanks for testing it Richard. It was very strange to me.

Anyway, no other version exists. I did sign in to the site but no other version exists.

Ioannis

tried it on Arduino mega
@100uS it worked
@200uS its patchy
@400uS or longer its crap

conclusion , not much use but quaint

[CuriousOne]

I tried to re-use Richards code, but I have encoder on PORTB.3 and PORTB.4 and not using button. I've changed enc_a to portb.4
and enc_b to portb.3, but I guess I also have to modify re = porta&12 ? to what it set?

[richard]

I've changed enc_a to portb.4 and enc_b to portb.3, but I guess I also have to modify re = porta&12 ? to what it set?

its a simple binary mask used to select only the port pin data from the two pins of interest
the mask value is 2 to power of enc_a.bit + 2 to power of enc_b.bit.


you also need to shift the data gathered into bits 0 and 1 for proper evaluation