Read data from LCD?

LWesthaver · Joined: 26 Jan 2006 Posts: 11

Currently I use the BASCOM-8051 LCD routines to write to and control my LCD (they are very convenient) but I see no way to retrieve data from the LCD's DDRAM. This would be a really useful feature for me.

I would think a function like:

Dim X as Byte
Locate 1,5 ' point to LCD character
X = LCD ' retrieve LCD character

might be a good way to implement such a feature.

What do you think?

bzijlstra · Posted: Tue Mar 07, 2006 6:47 pm Post subject: Reading LCD

Have even seen a program that uses the non-used RAM locations of a LCD. If you use a 16 x 2 LCD, you will have 40 x 2 byte of RAM and only 16 x 2 are used (visible). So you will have 80 - 32 = 48 bytes you can use as pure RAM.

Have fun
Ben Zijlstra

LWesthaver · Joined: 26 Jan 2006 Posts: 11

Exactly! If you have extra RAM available in the LCD, why not put it to use?

Also, I use password protection in my firmware and it bugs me that I have the password the user entered sitting there in the LCD's RAM and yet I can't easily read it. I have to keep another copy of the password in scratch RAM. What a waste.

-wes