LCD driver for Interfacing JHD 162A with PIC16F877A

[SubhamayS]

Can anyone please provide me the compatible driver for interfacing LCD JHD162A with PIC16F877A.

I have tried several times with the regular LCD.c driver, but the lcd is showing only 'black box'. The connections seem to be ok. I think its the initialization problem. or is it a compatibility issue !

Please HELP !

Thanks in advance.

[Ttelmah]

It's dead standard.

It'll run off lcd.c, if the connections are right.
Things to try:

Triple check the connections. Remember the bias voltage needs to be connected as well
Remember also that it is D4 to D7 on the LCD that have to connect to the PIC (not D0 to D3). Also remember the ground needs to be connected.

Make sure you add a delay before calling LCD_INIT. Many of these clone LCD's do not start to power up, till the supply gets up to perhaps 4.5v. The PIC starts at a much lower voltage, so can start too quickly for the display.

Also, look at:

<http://www.edaboard.com/thread293536.html>

Others have commented on a high tendency to faulty units with these....

Best Wishes

[SubhamayS]

Thanks a lot for the reply.

[Ttelmah]

No.
I mean that the ground of the LCD also needs to be connected to the same ground as the PIC. It is surprising how many people forget that these must also connect together. What do you have on the bias voltage pin?.

Best Wishes

[SubhamayS]

[Ttelmah]

That is not right for the bias.

Normally it needs to be close to 0v.

The data sheet for this series, show it connected to _ground_ via a resistor.

Would explain the display being fully black....

Best Wishes

[SubhamayS]