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LCD- KEYPAD hookup question
Posted: Thu May 15, 2003 8:36 pm
by cliff
Im am looking to integrate a serial LCD and keypad to a NEC V832 microprocessor. programming is not the concern as of yet--the actual hardware connectivity is the issue. Anybody have any pains or gains dealing with such peripheral devices connected to this processor/ Any advice on the physical connectivity is more than greatly appreciated. Thank you.
Posted: Fri May 16, 2003 2:27 pm
by Miles
I personally don't have an experience with that microprocessor, but I can give you some insight on how our keypad routine work. Our keypads are of matrix style which means that when a row and column are shorted together a keypress is generated. Once this keypress is generated an ascii value corresponding to the keypress is sent via the 232 line. At this point it is up to your microprocessor on how to interpret this value and use it accordingly.