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problem with LCD

 
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problem with LCD
PostPosted: Wed Apr 23, 2008 3:28 pm     Reply with quote
Hi, I'm using TS1620B-7 2x16 LCD but it doesn't work on board. I'm using PIC16F877. I connected D0-E, D1-RS, D2-RW, D4-D7 -DB4-DB7, Vo and Vss 0V, Vdd 5V. It works on Proteus but doesnt work on board.Is there any extra connection for this LCD?
My codes are very simple:



Code:

#include <16F877A.H>
#fuses XT,NOWDT,NOPROTECT,BROWNOUT,PUT,NOLVP
#use delay (clock=4000000)
#include <lcd.c>

int a=5;

void main()
{
lcd_init();
while(1)
{
printf(lcd_putc,"\f %d",a);
delay_ms(500);
}
}


can u help me what is the problem?
meereck



Joined: 09 Nov 2006
Posts: 173

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PostPosted: Wed Apr 23, 2008 4:05 pm     Reply with quote
try to connect D0-D3 of the LCD to the ground. Make sure that there is about 0.4V on Vo pin (contrast pin).
You can also try to use Flex driver by PCM Programmer - http://www.ccsinfo.com/forum/viewtopic.php?t=24661
foodwatch



Joined: 18 Apr 2006
Posts: 66

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PostPosted: Wed Apr 23, 2008 7:54 pm     Reply with quote
look at lcd.c and be sure the d port pins are set up correctly. Do you get square blocks when you first power up, but before the program hits lcdinit()
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