Hello all,

I have a strange problem and in fact I am getting
crazy about it.I am almost new to the PIC programming
however I have to work hard in a short while.I am ok
with the I/O ports, ADC, Picc commands and etc. but
when it came to the lcd output, nothing worked. Hope
someone can help me about it.

I have a 2*16 Hitachi 44780 controller LCD (LM016L)
and I am using PIC 16F877, 4 MHz crystal source and a
5 V power supply.I set up a small circuit in order to
test lcd. The schematic is here:

http://rapidshare.de/files/2054592/lcd.JPG.html=20

My code is the following:

#include pic.h //(i could not put pic.h in brackets
here, when posting to the forum,don't know why but
pic.h in brackets literally)

#include delay.c //(delay.c in brackets literally)

#include lcd.c // (lcd.c in brackets literally)

main(void)
{

TRISA=3D0;
TRISB=3D0;
lcd_init();
lcd_clear();
lcd_puts("HELLO");

for(;;)
{

}
}

All of the header and source files (pic.h, delay.c,
lcd.c) are from the include&samples directory of Hi
Tech Picc Compiler (V 8.02 PL1) and nothing has been
changed.I have used both MPLab integrated compiler and
the distinct compiler and got the hex file without any
error.When I load it to the PIC via my programmer, I
chose =93Watchdog Timer=94 disabled and =93Oscillator Type=94
as XT (crystal). Finally, All I see on the LCD panel
is that the dots of all characters of upper row is
turning grey and no text on the screen.When I adjust
the pot value, contrast is changing but I don=92t see
any =93Hello=94.

My oscillator, my power source and my PIC are ok
because I have tested all in a LED circuit.=20
As a solution, I have tried =93Full Optimization=94 when I
am compiling via Command Line Picc Compiler and chose
=931=94 as global Optimization Level but nothing changed.I
haven=92t changed any settings of optimization in MpLab
integration.

What am I missing???

I am looking forward to hearing from you.Thanks in
advance...=20

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