I am trying to set up a maxtrix keypad using the driver found here
Why are the matrix Rows supposed to be set as output ports here?
See GUS on Video!
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Ya this is not clear enough for me. I understand scanning a matrix in software but not how it correlates to rows and columns of buttons.
Maybe this will help you.
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This seems like an improvement over the KP16 driver. Only one pin is used instead of 6. Is there an advantage to using an interrupt instead of polling?
Thank you!