Hello every one
I have this LCD from old HP LJ Printer, and the pin-out data of the LCD that I found is kinda complicated for me to understand, I began my PIC journey with PIC16F767, and I'm dying to interface this LCD to it, any help?

here some information:
- the LCD information link: https://kbiva.wordpress.com/2012/12/30/hp-laserjet-4500-front-panel/

 

It uses the SPI interface and the PIC16F767 has a SPI module but it seems a lot of work for an old LCD.

 

Hello every one
I have this LCD from old HP LJ Printer, and the pin-out data of the LCD that I found is kinda complicated for me to understand, I began my PIC journey with PIC16F767, and I'm dying to interface this LCD to it, any help?

here some information:
- the LCD information link: https://kbiva.wordpress.com/2012/12/30/hp-laserjet-4500-front-panel/

What compiler do you plan to use??

The way it usually works around here is you do the bulk of the work then we help.

 

It uses the SPI interface and the PIC16F767 has a SPI module but it seems a lot of work for an old LCD.

SPI is not that horribly difficult. For a newbie perhaps.

 

SPI is not that horribly difficult. For a newbie perhaps.

Sure, I've hacked a few older scrap displays but there are very nice modern SPI LCD modules like DogLcd that include the complete character set and have generic programming interfaces for 3.3 or 5vdc systems..
http://www.lcd-module.com/eng/pdf/doma/dog-me.pdf

 

Dear mates
thanks for your concern, I'm using MikroC compiler, but I just need to know how to {connect} such old LCD to PIC, it has about 4 data pins only!

 

Look at the pic datasheet for spi pin connections.
https://learn.mikroe.com/spi-bus/

 

Look at the pic datasheet for spi pin connections.
https://learn.mikroe.com/spi-bus/

Dear nsaspook
I'm very grateful for this piece of information, I had no idea before about SPI mode, you made my day!

 

Depending on the compiler of choice, the datasheet may not be the whole answer. Many compilers have libraries to make interfacing to peripherals a lot easier.

 

View attachment 137083 here are the 4 lines in PIC16F767