Pic16f690 and LCD

[BobK]

Hi Ross,

Take pin 3 of the LCD and connect it to the wiper on a 5K ohm potentiometer (pot) and then tie one side of the pot to ground and the other side to + 5volts. This controls the contrast of the display. Adjust the pot until you can see the characters. Once you know what resistance gives you
the correct view you could read the pot's resistance then just substitute a 1/2 watt resistor with the desired resistance OR you can just leave the pot in the circuit.

HTH,

BobK

[ross246]

I was just about to post saying I solved it (typical i work it out once I post this) I changed it to DEFINE LCD_DBIT 0 and its sorted it out however it works for the first few seconds (about 3) then the line gets filled with garbage characters and some of them turn to black blocks with characters barely visible inside them. Will swap the lcd. Thanks for the reply will do that too progress! lol

[Darrel Taylor]

Try removing the line ...
HIGH PORTB.6

B.6 is the Enable Line which is handled by the LCDOUT command.
You don't need to set it HIGH to enable the LCD.

[ross246]

Working perfectly now on a new lcd, not sure whether it was removing the HIGH Portb.6 or the new lcd thanks anyways though. I really appreciate it.