After a few searches, I found what I was trying to suggest here.

http://www.pic24.ru/doku.php/en/osa/...oduction/intro
http://www.pic24.ru/doku.php/en/osa/ref/download/intro

and this quartet example might be the one that may help you

http://www.pic24.ru/doku.php/en/osa/...pendix/quartet