Hello, everyone I need a little help with making a Keypad interface with a LCD (16x2) and a PIC16F88 or PIC16F84 (they have same layout). I want to implement a keypad but with a phone keypad function (see image below), by that I mean is that if "2 button" is pressed once a "2" is displayed; twice "a", three times a "b". Also instead of a " * " and " # " buttons, ENTER and DEL bottons with those functions. Displaying something is not that difficult,but I honestly have no idea on how to make a program that does that, because it's the first time I use KEYPADs.
P.S. I have an image of the circuit I made in Proteus (see files). NOTE KEY PAD IS 4X3
link: http://prntscr.com/baw0l4
P.S. I have an image of the circuit I made in Proteus (see files). NOTE KEY PAD IS 4X3
link: http://prntscr.com/baw0l4
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