Graphical LCD help

[grovesy]

Hi there, I am pretty new to electronics but have experience in microcontrollers (TI) and know nothing about graphical LCD's.

I'm hoping someone can point me in the right direction to some useful URL's books, projects that will help me understand how I can go about driving a graphical LCD with a microcontroller. And ideally with a C language compile for the MC.

Many Thanks,
Chris

 

[Oznog]

You don't need a book. MCC18 and PICC18 are good C compilers for the PIC.

Buy a module with a controller on-board. It would be difficult and expensive to try to get ahold of a controller and mate it with a bare LCD. Don't!

The documentation for the controller used in your device should tell you what you need to know. T6963C is a really common graphical controller. SED1330 is probably the second most common.

There are a number of code examples for driving a T6963C LCD. The C examples I have aren't of really great quality, it's not hard to write your own.

Graphics LCDs all require a negative voltage for the contrast. This is slightly tricky to generate and regulate though a PIC can do it.

It's a good idea to take this to the uC forum.

 

[Gorgon]

Graphics LCDs all require a negative voltage for the contrast. This is slightly tricky to generate and regulate though a PIC can do it.

Most Graphical LCD modules generate the negative voltage, you only need to return it to the module together with the contrast adjustments. This adjustment is normally only done once and then forgotten. Why not use the recommended pot to do this?

TOK