Reading incremental encoder interupt

[iw2fvo]

Hi ,
i wrote a picbasic program to read an optical incremental encoder : it used in my DDS frequency generator ( not finished at the moment ) But the encoder piece of program works very well .
Please note that I am not a software engineer and so the program is not optimized at all.
Comments are in italian but it is easy to find out the encoder piece that you need.
Pls: let me know ...
Ambrogio
IW2FVO
North Italy

Hi

I would like to make a small project to read an incremental encoder
with differencial A/B outputs and send its position on request via RS232

I need to count the pulses, determinate if it is going CW or CCW
on a serial request I need to send the number of counted pulses via RS232

Which way shall I go:

Use I/O ports for the A & B pulses and use a Hardware UART to handle the incoming request of the encoder (the request command is only 2 bytes)

Or count the pulses of the encoder with an interupt based routine ?

Any idea's are welcome