Functionality with GLK240128-25-WB

Bert · Post by **Bert** » Thu Jan 31, 2008 3:56 pm

Ok , so I want to use this LCD for my senior design project as I am a student at the University of Akron. So I have the LCD connected currently to my PIC24F development board via RS-232 and I have no problem with getting information to scroll accross the screen.

My question is this:

I want to use the display to display and active clock in one section, 2 different temp. reading and 2 humidity reading in another section, and a barametric reading along with a couple of bitmaps. Can I get this type of functionality out of this LCD ? If not , do I have to use one of the other LCD's and interface the toshiba controller directly?

Any help would be appreciated, thanks.

Post by **Ray** » Fri Feb 01, 2008 8:16 am

Bitmaps, specific locations for text and drawing lines and squares are all fully supported on this display. The command set provided to you gives you a higher abstraction then the normal t6963c command set which only allow you to write to the screenbuffer directly but has no notion of fonts and lines and squares.

The display however has no 1-wire bus like other displays we offer to attach temp and humidity sensors to so you will have to interface those directly to your pic.

You can find a manual outlining the usage of all commands supported on your display over here. If you have any specific questions feel free to ask and good luck on your senior design!

Bert · Post by **Bert** » Fri Feb 01, 2008 10:08 am

Im sorry, I am kind of a newbie when it comes to all of this. My concern is that I won't be able to have on the screen all the information I want at the same time. For example , will I be able to have a clock display with seconds that change without having to redraw the whole screen each time or have a change in temp. From what I read from the manual and from what I have been able to do, it works like a typewriter, the data in to the LCD goes to the first line and wraps around . I guess I am wondering if there are commands that can be inputed that will only change the seconds when needed in the clock and then my temp. when needed. Also can I use more than one font size at a time.

Thanks for your help.

Post by **Ray** » Fri Feb 01, 2008 11:22 am

If you just keep sendig text to it it will indeed start to scroll, however if you place the cursor somewhere, write some text and then place it somewhere else and again write some text. Then you will only be updating certain parts of the screen.

Working with two fonts is not an issue at all just select the font you want using the font select command shortly before sending any text and you'll be fine.

About your clock, if you are just using lines to draw the hands of the clock you can just draw a line in white to remove the previos position and paint a black one at the new position.

Explore the manual a bit and find out the various commands that can help you on the tasks you are facing.