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Problem in Using LCD 16X2 (Model: Topway LMB162ABC)

 
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leeyung



Joined: 23 Feb 2009
Posts: 4

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Problem in Using LCD 16X2 (Model: Topway LMB162ABC)
PostPosted: Mon Mar 02, 2009 5:10 am     Reply with quote
Hi all, I am very new to electronics. I would like to seek help regarding the initialization of LCD with PIC16F877A. I had configured my hardware PIC16F877A to connect with this 16X2 LCD (Topway LMB162ABC). I am using Port B to interface with the LCD.

RB0 = E
RB1 = RS
RB2 = R/W
and I'm using 4-Bit Mode
so

RB7 = Data Line 7
RB6 = Data Line 6
RB5 = Data Line 5
RB4 = Data Line 4

Contrast of LCD had been set too

I am using PCW C Compiler to compile my Hex file. Below is my simple program that used to test the LCD but unfortunately, it doesn't show up anything... any idea?
Code:
#include <16f877a.h>
#use delay(clock = 20000000)
#fuses hs, noprotect, nowdt, nolvp
#define use_portb_lcd TRUE
#include <lcd.c>

#byte PORTB=6

void main()
{ set_tris_b(0);
   lcd_init();
   
   do{
      lcd_putc("\fTESTING\n");
       }while(1);
}

The output of the LCD as shown like this....
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Mar 02, 2009 11:55 am     Reply with quote
Use the Flex driver. It's easier:
http://www.ccsinfo.com/forum/viewtopic.php?t=24661
Carefully check all your connections. Make sure you are using
the correct pin numbers on the LCD and the PIC.

If you have never done anything with a PIC before, don't start with
an lcd. Start with an LED blinking program:
Code:
#include <16F877A.H>
#fuses HS, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=20000000)

//===============================
void main()
{

while(1)
  {
   output_high(PIN_B0);  // Blink LED on Pin B0
   delay_ms(500);
   output_low(PIN_B0);
   delay_ms(500);
  }

}
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