Reading status from LCD unit

LCDMan · Post by **LCDMan** » Fri Jul 12, 2002 10:38 am

Is there any way to query the unit to:

a. Determine if the backlight is currently on/off.
b. Read the 40 characters stored as the startup/bootup screen.

Thanks,
LCDMan.

Post by **Henry** » Fri Jul 12, 2002 10:42 am

No there is no way to read those values from memory.

LCDMan · Post by **LCDMan** » Fri Jul 12, 2002 10:46 am

Thanks.

Is there any intention of adding these features for any future models?

LCDMan.

Post by **Henry** » Fri Jul 12, 2002 10:50 am

On the new graphic displays GLK16080-20 you will be able to perform a file dump getting the startup bitmap from memory...

but I don't see why one would want that, especialy the backlight status...

LCDMan · Post by **LCDMan** » Fri Jul 12, 2002 11:02 am

Well, I am writing some C++ code to communicate with the unit and I am writing a ToggleBacklight() function.

Now, if the user only uses my software to "talk" to the LCD, then there is no problem, but assume that he/she has used some other app and that app has turned on the LCD backlight. Now when my app starts up, it expects the backlight to be off and hence my ToggleBacklight() will perform incorrectly, since I cannot read the current status of the backlight at my app startup.

Sorry for the long post, but I just wanted to explain why I needed it.

Thanks,
LCDMan.

LCDMan · Post by **LCDMan** » Fri Jul 12, 2002 11:12 am

Nevermind, I figured out a way to do it

Just set the backlight to off, first thing when the app starts up, so I have a known "good state".

DuH! It's so simple, wonder why I didn't think of that before....

zedgama3 · Post by **zedgama3** » Wed Sep 11, 2002 7:18 pm

The hardest answer to find is the one directly under your nose.

Post by **Henry** » Thu Sep 12, 2002 10:16 am

And then you slap your self and thing "what the heck was I thinking!?!?!"

LCDMan · Post by **LCDMan** » Thu Sep 12, 2002 10:40 am

Exactly!