Re: [Gumstix-users] 16bit consolelcd-vx

[Marc H. <mhu...@lo...>]

The first time I powered mine up it was not responding. I then logged in on
the regular console port and reran the ts_calibrate utility. After that
touch screen worked like a charm. No pullups or mods done to the
consoleLCD16-vx.

-----Original Message-----
From: gum...@li...
[mailto:gum...@li...] On Behalf Of Neil Brown
Sent: Friday, March 28, 2008 8:28 AM
To: General mailing list for gumstix users.
Subject: Re: [Gumstix-users] 16bit consolelcd-vx


Is everyone who has a ConsoleLCD16 seeing their touchscreen fail to 
respond without these pullups?  I know mine doesn't work.

-o-
Neil

David Vescovi wrote:
> Marq Rasmussen <marq84004 <at> yahoo.com> writes:
>
>   
>> Does this board fix a lot of the problems that people were having with
the 18
>> bit version? 
>>
>>     
>
> Looks like the ConsoleLCD16 fixed the problem with the not connected touch

> interrupt line.
> I have a brand new ConsoleLCD16 board that will not commuicate with the
touch 
> controller chip. (even tho it has a QA stamp on it)
>
> There are no pullups on the I2C SDA and SCL lines.
>
> I added 20k pullups to these two lines and it started working.
> The PXA270 has very weak pullups when GPIO configured as input.
> This seems to be marginal at best. Definitely not ideal. 
>
>
>
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