Re: [Lcd4linux-devel] WRAP platform and LCD4Linux

[Luis.F.Correia <Lui...@se...>]

Hi, 

> -----Original Message-----
> From: Stefan Krister [mailto:ste...@cr...] 
> > Everything is powered via the USB port and the LCD does have a LCD 
> > backlight.
> 
> O.K. - how much current does it consume?

It reports 74mA to the USB hub.

> > If you want my advice do this, get a standard 7805 voltage 
> regulator, 
> > remove the SMD one (near the power supply behind the minipci socket 
> > card and solder there the wires. Then get a good heatsink 
> and away you go.
> 
> I do not want to directly solder on the WRAP. Nor do the 
> other WRAP users in the fli4l community want to directly 
> solder on the WRAP. The most of them don't have the USB 
> expansion - as a consequence not wanting to solder ...

Ok, while i do not advise the community to change the SMD 7805, the
USB port is a good addition.

But I do understand your concerns.

> I'm trying all the possibillities - I2C, USB and GPIO for the 
> community, not for myself alone. And I'll publish my 
> experiences to give everybody out there the chance to take 
> the best option for themself.
> 
> I'm dreaming on a small PCB, plugged head-over onto the J2 
> (LPC-Expansion), having all needed datalines, a 
> contrast-potentiometer and a (5V) voltage-booster connected 
> to the front-lcd in my enclosure. I wish this dream comes 
> true. And this would be the easiest way to have a LCD 
> connected to a (unsoldered) WRAP - and maybe there are 
> solderers out there which sell ready made PCBs for the community.

Ok, this would be a good project, I think. I can help you with the
GPIO think, but only for 2.4 kernels. Still interested?

> >> 1st - programming the Atmel is a problem for anybody out there who 
> >> hasn't to do anything with Atmels before.
> >
> > It isn't if you can get them already programmed.
> 
> Yes. I hope, Till helps me out of this problem.
> 
> >> 2nd - using GPIO on WRAP enables the possibility to put the LCD in 
> >> the WRAP enclosure. O.K. not into the original one - but 
> my enclosure 
> >> has enough room on the front to put a 16x2 LCD in.
> >
> > Not really, although i've chosen to have mine externally, 
> it would fit 
> > in any enclosure that is bigger then the original (which to 
> me is kind 
> > of useless since you can't even remove the CF card without 
> having to 
> > unscrew the board...)
> 
> I've a Powertip PC1602-E (measures 66mm x 23mm, datasheet:
> http://www.powertipusa.com/pdf/pc1602e.pdf ) - it will fit 
> into my front panel. Stay tuned, this week I'll order new 
> panels with cutouts for that LCD.
> 
> > As you wish, Lcd4linux is working perfectly with LCD2USB 
> and I2C, no 
> > need to make any further programming.
> 
> Sorry Luis, as mentioned weeks before, the DOG-M modules need 
> special initializing. And they have software controlled 
> contrast-settings. I want to make this modules usable by 
> lcd4linux - not for I2C alone.

Well, i can't really help, as I don't have any DOG-M module.
Send me a PM about this, please.

Luis