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SERIAL LCD interfacing PIC16F877A (Gibberish display)

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JiggyPepper

Joined: 02 Feb 2012
Posts: 7

SERIAL LCD interfacing PIC16F877A (Gibberish display)

Posted: Tue Feb 21, 2012 7:07 am

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Specs:
1) PIC16F877A
2) MPLAB IDE
3) CCS C
4) Serial 4x20 LCD
Supply is 9V with common ground with the microcontroller.

Main initialization:

Code:

#include <16F877a.h>
#fuses HS,NOWDT, NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv =PIN_C7)

So here's the story, I'm trying to integrate a serial LCD display in my system.

but it seems a simple printf is ineffective.

Code:

void main() {
printf( "hello.");
}

This displays blocks and gibberish into my LCD. So I'm thinking that the lcd may require ASCII commands? Am I on the right track? Any general help will be much appreciated.

ezflyr

Joined: 25 Oct 2010
Posts: 1019
Location: Tewksbury, MA


Posted: Tue Feb 21, 2012 7:35 am

Hi, Is this question a joke? How do we know what your serial display requires? Did you even read its datasheet? What does it say about communicating with the display? A pattern is emerging here.... John

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