PIC 16f877A LCD problem!

**uaf5000** · - 19th May 2010, 20:54

Hello Guys,

I have interfaced LCD with my PIC 16f877a. I want to initially display words on my lcd but the problem is only garbage value is being displayed. Please tell me the solution. I have given the code which i used to program the MCU.

Regards.

CLEAR
DEFINE OSC 4
DEFINE LCD_DREG PORTD
DEFINE LCD_RSREG PORTE
DEFINE LCD_RSBIT 0
DEFINE LCD_EREG PORTE
DEFINE LCD_EBIT 1
DEFINE LCD_RWREG PORTE
DEFINE LCD_RWBIT 2
DEFINE LCD_BITS 8
DEFINE LCD_LINES 1
DEFINE LCD_COMMANDUS 2000
DEFINE LCD_DATAUS 50
PAUSE 500
LOW PORTE.2
TRISD = %00000000
TRISE = %00000000
ADCON1=%00000111
LOOP:
LCDOUT $FE, 1
PAUSE 250
LCDOUT "HELLO"
LCDOUT $FE,$C0
LCDOUT "WORLD"
PAUSE 250
GOTO LOOP
END

**BobK** · - 19th May 2010, 22:36

Hello uaf5000,

Well at first glance you are missing the line "DEFINE LCD DBIT 0". You also have a line that says you are only using 1 line when the statement "LCDOUT $FE,$C0" is the command to display the following on the second line of the LCD. Make these changes and see how it goes.
Your code can also read--"LCDOUT $FE,1,"Hello"
"LCDOUT $FE,$C0,"World"

I think this also may have been messing things up for you.

HTH,

BobK

**uaf5000** · - 19th May 2010, 23:07

Still same garbage values =(. I made the changes you told. But in those garbage values letter 'D' is appearing which wasn't before. What shall i do now? =(