how to read data from 2*16 lcd

[alaaalkhfagi]

hi all,i hav displayed a msg on 2*16 lcd...but now i want to read the data from lcd and sent this to atmega16 for further processing...how to do it
"i am new to microcontrollers so please answer me in details"

 

[sky_123]

If you have written a message, then the microcontroller knows what it sent to the LCD display. Why not store that in a variable?
LCDs are generally 1-way - they don't let you read the content, any more than a printer can read the printed sheet.
When you send a document to a printer, Microsoft Word still remembers what it sent to the printer. It doesn't try to read the printed paper!
(More complex LCDs have read capability but I doubt you're using that kind of LCD).

 

[Baas Rietrot]

You can read from a LCD. There is a R/W bit, in other words if you can already write to your
LCD just change this bit and then you could read from the LCD.

The best advice when dealing with a LCD is: study the datasheet and make sure your
start-up and R/W timing sequences is greater or equal to the specified time.