Issues with encoder code

[jgannon]

My team has been using Kevin Watson's encoder code in conjunction with the KOP gear tooth sensors, to great success. Unfortunately, during one of our last matches, the wires got yanked off of the RC, and broke the signal pin on digital IO 1. Fortunately, this is not a huge deal, so we got the broken pin out of the cable, and moved the encoders over to digital IO 3 and 4. Now, when I run the code, encoders 3 and 4 start out at 0. If I spin one side of the drivetrain, the count for that side increases to 1, and no more. I have the same problem if I try IO 5 or 6. I know that the sensors are still working fine, because if I move one back to IO 2, then I get the expected counts. Has anyone else run into trouble with using encoders on 3-6? Any suggestions? I'm hoping we'll be able to have a working autonomous mode again in Atlanta.