Re: [Gumstix-users] USB Client from power up

[Grahame J. <gj...@ge...>]

Hi Leigh,

I am using the stock standard GPIO35 and GPIO41. However I think it looks like 
I do need the MAX323 to detect that it is plugged in.

Cheers

Grahame


On Thu, 30 Mar 2006 02:15, Leigh Wells wrote:
> I too have created an external board for USB, and am struggling to get
> it to work at all.  I'm actually trying to use two different pins for
> GPIOx and GPIOn.  According to the wiki, Gumstix uses GPIO35 for GPIOn
> and GPIO41 for GPIOx. I'm using GPIO71 for GPIOn and GPIO70 for GPIOx,
> and can't seem to get it to recognize at all.  I copied the schematic
> pretty much exactly, including a TPS3823 to take the place of the MAX
> 323 (it should have the same affect).
>
> Sorry I can't answer your question about the MAX323, but I'm wondering
> if you used the same GPIO 35 and 41 or did you successfully use others?
> If not has anyone else out there done this?  I've got usbnet set up on
> both a Linux box and a Win box, and it works fine with the Waysmall, but
> when I use these different GPIOs on my board I can't get it to work.
> All I did software-wise is change gumstix.h to reflect the new #defines
> for GPIOn and GPIOx, and rebuild. Craig seemed to think that this was
> all that was necessary.
>
> Thanks!
>
> 	 Leigh W. Wells
>
> -----Original Message-----
> From: gum...@li...
> [mailto:gum...@li...] On Behalf Of Grahame
> Jordan
> Sent: Wednesday, March 29, 2006 1:08 AM
> To: gum...@li...
> Subject: [Gumstix-users] USB Client from power up
>
> Hi,
>
>  From information from
> http://www.gumstix.org/tikiwiki/tiki-index.php?page=USB_Client
> I have created a prototype circuit that the gumstix plugs into.  I
> thought that the MAX 323 was only for detecting USB power so I did not
> include it.
>
> However the USB is not detecting from power up with the USB plugged in.
> I need to replug the USB after the gumstix has booted - then the USB
> detects OK.
>
> Is the MAX323 used to detect that the USB is plugged in at power up?
>
> Thanks
>
> Grahame Jordan
>
>
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Grahame Jordan
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