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Originally Posted by Max Lobovsky
My original design was to use an 8 bit counter and shift register for each axis but I decided that the increased complexity in circuit and software was not worth saving a few pins. (Save the pins for what, anyway?) I did look for a counter with shift register combined, and the only one I (think I) found is http://www.digikey.com/scripts/DkSea...sus.dll?Filter The reason I say think is because the datasheet is very unclear (no truth tables or anything). Additonally, it is only 4 bit, so I would either have to poll it outside the main loop using a timer interrupt or cascade it. Again, the complexity was prohibitive.
I will soon post pictures of my counters and sensors (which I think should void any of this discussion because of their simplicty.) Everything has been tested except for the robustness of the sensors on a running robot. |
Just to clarify, max is reffering to omni wheels with encoders on them, not optical mice. The interfacing is the same though.