4x40 LCD?

ELCouz · Joined: 18 Jul 2007 Posts: 427 Location: Montreal,Quebec

Hi,

I have a few 4x40 LCD displays.

I know they are different than their little brothers (2x16, 2x20, 4x20).

They require a second enable pin because being 2 LCD driver inside on the same board.

Do anyone have successfully make them work with a PIC?

The only real post I've seen on this forum for a 4x40 LCD is a code library tested only in Proteus.

Thank you very much!
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Regards,
Laurent

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Ttelmah · Joined: 11 Mar 2010 Posts: 19510

They literally are 2* 40x2.

Have a look at this thread:

<http://www.ccsinfo.com/forum/viewtopic.php?t=52606>

The code mods done here, I originally did to drive a 40x2....

The only extra bits you have to add if you want to be really tidy, are to encapsulate the switching, so that (for instance) if you do a goto, it automatically switches to the second display for the high two lines, and when you line feed at the bottom of the first display it again automatically switches.

Best Wishes

ertansuluagac · Joined: 13 Jul 2017 Posts: 135 Location: IZMIR

Hello everyone
I did an application with 4x40 character lcd working just fine. It will require some modification for it to work on a 4x40 character LCD. It looks like the main difference is that the 4x40 has two enable pins one for the controller used to display characters on the top two lines, and one for the controller used to display character on the bottom two lines.

https://onedrive.live.com/?cid=37A815E27F350BC9&id=37A815E27F350BC9%2131139&parId=root&o=OneUp[/url]
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Es