Flex_LCD - Question for PCM

Guest · Posted: Wed Jan 31, 2007 10:28 am

Hi PCM,

I'd like to use the Flex_LCD driver with a 4 line LCD. I see references in the code library to a 'beta' version of this driver that you created for the 4 line LCD but were unable to test. You apparently sent the modified version to a couple of users for evaluation, but I don't see any evidence that there was any closure on this issue. At the moment, I'm using the 2 line version, but need to update my design with a 4 line LCD. Can you help? If the modified version was never tested to your satisfaction, I'd be happy to do that!

John

jecottrell · Joined: 16 Jan 2005 Posts: 559 Location: Tucson, AZ

John,

I just modified the driver to work with a 20x4 display (HD66712U) controller. Figure out what controller the LCD that you would like to implement has and I can help a little.

John

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

It's in the code library as a separate topic on the first page:
Flexible LCD driver for 20x4 LCDs
Here's the link:
http://www.ccsinfo.com/forum/viewtopic.php?t=28268

I will go edit my old posts in the 16x2 driver topic, and provide
a link to the 20x4 driver.

Guest · Posted: Wed Jan 31, 2007 12:52 pm

Hi John & PCM,

Thanks guys, I got the 4 X 20 driver and it works fine! Sorry for the trouble, I should have looked further, but the comments in the origianl driver thread threw me off....

John

Guest · Posted: Thu Feb 01, 2007 3:22 pm

Hi,

One oddity I have observed is that when the data is too long for the 1st line, it wraps to line 3. If I send the same data again, it wraps to line 2, and finally, line 2 wraps to line 4. So it goes like this:

Line1: 123456789ABCDEFGHIJK <----- Displayed 1st
Line2: KL123456789ABCDEFGHI <----- Displayed 3rd
Line3: L123456789ABCDEFGHIJ <----- Displayed 2nd
Line4: JKL123456789ABCDEFGH <----- Displayed 4th

I'm not sure what to make of this?

John