title: Driving a bi-color 8*8 led matri with Max7219 and Atmega 16 or similar microcontroller
body: <p>I have a common anode bi-color led matrix with 24 pins and want to drive two of these using one microcontroller . So I decided to try Max7219 driver for that. But being a novice I'm having a  hard time figuring out what to do and the online resources seem to be centered around arduino. I did find a <a href="http://davidegironi.blogspot.it/" rel="nofollow noreferrer">library</a> developed by Davide Gironi. But it seems to be working with a common cathode matrix. So I changed the rows to columns to adapt with the common anode structure but with no luck.
  Can you please give me some clues to where to look for the solution?</p>