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Originally Posted by jgeorge
Alan, Thanks for good suggestions. I will try to wrangle a scope from somewhere into the school to check encoder signals. And do the output bit test trick as well. Should give a good picture of situation.
Kevin, Thanks for reply. I will build the board. But, why does it work sometimes? Just marginal you think? I was going to stop all prints and see if it works better as the TX buffer intr. taking too long might interfere with the encoder phase B read causing the problem. Maybe in some versions of code, the print time is synched with the encoder phase B just right! In any case, I agree with you that it appears I will have to build board.
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Yeah, it would be great to put a scope on it and see what's happening. Make sure you look at the signals at the robot controller (sorry if I'm pointing out something obvious). If you figure out what's going on please post your findings.
-Kevin