4x20 with Joe Daltons HD44780 no backlight

Balatron · 2008-01-04, 15:13

Hi,

i managed to get my 4x20 LCD working with Joe Daltons HD44780 Driver. Unfortunately the backlight keeps turning of after i start MP. With LCD smartie everything works fine. Has anybody got an idea?

Regards, B:

chemelli · 2008-01-04, 15:24

Balatron,

you can ask Cybrmage to check this, he is the only guy working on ExternalDisplay stuff as JoeDalton has left...
and he did a so good job with other drivers...

Simone

Balatron · 2008-01-04, 15:47

Ok thanks, i´ll try to reach him. The funny thing is it worked at the beginning. Now the backlight only flickers slightly in the beginning and if i close MP - strange...

Corn · 2008-03-10, 16:47

I'm new to Media Portal, have been using GBPVR but prefer Medial Portal.

Back on topic.

I have a H44780 and have tried all the H44780 type none of them display anything except for Joe Daltons driver, but I have the same problem, the back light flickers then turns off, making reading the display impossible.

Hope this can be fixed soon.

@Balatron, you mentioned that it did work. Would it be possible to get an older version of the LCD plugin and Joe Daltons H44780 driver and use it with the current release of Media Portal.

Balatron · 2008-03-10, 17:48

Hello,

sorry i could´nt solve the problem in MP. I have just put the backlight on "always on". so its permanently on (A swich on the lights PCB).

If you figure out how it goes let me know.

Corn · 2008-03-10, 19:04

Have found some old LCD drivers, but did not work.

How do you permanently turn on the back light ????

Corn · 2008-03-11, 08:16

Have rolled back to the previous version with the same results.

So with Joe Dalton's retirement from maintain the LCD plugin, my best option is to get a different LCD display or some how turn the back light permamently on, which I don't know how to do.

Corn · 2008-03-11, 22:04

Well I got around the problem with the HD44780. I've changed the LCD device to Clipboard. Then I wrote a program that outputs the info to the LCD when the clipboard datachanges. I already had written a program to interface with the HD44780 so was not difficult.

Just need to tweak the application. So if media portal is not running the LCD turns off and when running LCD turns on. Plus some other tweaks.

2008-01-04, 15:13	#1 (permalink)
Balatron Portal Member Join Date: Oct 2007 Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts Country:	4x20 with Joe Daltons HD44780 no backlight Hi, i managed to get my 4x20 LCD working with Joe Daltons HD44780 Driver. Unfortunately the backlight keeps turning of after i start MP. With LCD smartie everything works fine. Has anybody got an idea? Regards, B:

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2008-01-04, 15:24	#2 (permalink)
chemelli Portal Developer Join Date: Sep 2006 Location: Italy - Padova Age: 34 Posts: 1,094 Thanks: 50 Thanked 48 Times in 39 Posts Country: My System	Balatron, you can ask Cybrmage to check this, he is the only guy working on ExternalDisplay stuff as JoeDalton has left... and he did a so good job with other drivers... Simone

2008-01-04, 15:47	#3 (permalink)
Balatron Portal Member Join Date: Oct 2007 Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts Country:	Ok thanks, i´ll try to reach him. The funny thing is it worked at the beginning. Now the backlight only flickers slightly in the beginning and if i close MP - strange...

2008-03-10, 16:47	#4 (permalink)
Corn Portal User Join Date: Mar 2008 Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	I'm new to Media Portal, have been using GBPVR but prefer Medial Portal. Back on topic. I have a H44780 and have tried all the H44780 type none of them display anything except for Joe Daltons driver, but I have the same problem, the back light flickers then turns off, making reading the display impossible. Hope this can be fixed soon. @Balatron, you mentioned that it did work. Would it be possible to get an older version of the LCD plugin and Joe Daltons H44780 driver and use it with the current release of Media Portal.

2008-03-10, 17:48	#5 (permalink)
Balatron Portal Member Join Date: Oct 2007 Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts Country:	Hello, sorry i could´nt solve the problem in MP. I have just put the backlight on "always on". so its permanently on (A swich on the lights PCB). If you figure out how it goes let me know.

2008-03-10, 19:04	#6 (permalink)
Corn Portal User Join Date: Mar 2008 Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Have found some old LCD drivers, but did not work. How do you permanently turn on the back light ????

2008-03-11, 08:16	#7 (permalink)
Corn Portal User Join Date: Mar 2008 Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Have rolled back to the previous version with the same results. So with Joe Dalton's retirement from maintain the LCD plugin, my best option is to get a different LCD display or some how turn the back light permamently on, which I don't know how to do.

2008-03-11, 22:04	#8 (permalink)
Corn Portal User Join Date: Mar 2008 Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Well I got around the problem with the HD44780. I've changed the LCD device to Clipboard. Then I wrote a program that outputs the info to the LCD when the clipboard datachanges. I already had written a program to interface with the HD44780 so was not difficult. Just need to tweak the application. So if media portal is not running the LCD turns off and when running LCD turns on. Plus some other tweaks.