How To Read The Lcd Displayed Data?

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sachin.kolkar

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hi,
HOW to read the data which is displyed on the LCD...........
i m using mikroc compiler ...
send me the example code .....
 
The data sheet says that you can read the display data. I haven't tried it though.

Mike.
 
Hi guys,

I always thought it might be easier/faster to maintain an LCD buffer in RAM in the host if you needed that capability but I suppose that would really only be practical for small 2x16, 2x20, 4x20, etc., character type displays.

Mike
 
sachin.kolkar said:
please tell me, can i read the data of LCD DATAROM or not?
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Yes you can. You will need the R/W line connected to a pin on the MCU. For details see these must-read articles from EPE Magazine (one already linked by Nigel):
https://www.electro-tech-online.com/custompdfs/2008/05/lcd1-2.pdf
https://www.electro-tech-online.com/custompdfs/2008/05/lcd2-3.pdf

Reading data from the LCD isn't given very much attention in the articles, except for the busy bit. Not many people do it because really, what's the point. You already wrote it. You probably already know what you wrote. It's not like it's a lot of data. Just save the state of the LCD in the MCU. Only the busy bit is really useful.

But if you have a reason to want to read data from the LCD, you can.
 
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