On Monday 06 December 2004 05:37, Wookey wrote:
> +++ Glen VanMilligan [04-12-01 10:21 -0800]:
> > Here is my USB power issue, this was sent to the Balloon list.
>
> OK - this (list) message doesn't seen to have made it to me yet. I wonder
> where it has got to.
>
> > ----------  Forwarded Message  ----------
> >
> > Subject: How do I test the USB ports?
> > Date: Tuesday 30 November 2004 10:38
> > From: Glen VanMilligan <glenv@vpcvalley.com>
> > To: Balloon <Balloon@balloonboard.org>
> >
> > I made a cable with a A-type usb connector on it to plug into J16 and
> > J15.  I put a scope on the lines on J16 and find no +5 volts, although I
> > find it on J15.
>
> Hmm -there may be some number confusion here. Looking at the
> top_compnents.pdf  layout diag then the 3 USB connectors on the top are:
> J15, J7, J16 (closest to J1 - serial/Jtag)
>
> This is different to the numbering on the clickable image map pic of the
> board on balloonboard.org/hardware/205/index.html (which numbers them
> J20,J18,J19 (which are the equivalent duplicate sockets)
>
> In fact I can't find J20,18 and 19 at all on the layout files - steve
> -where are they supposed to be - do they in fact exist?
>
> If someone (steve/dave?) can tell me which doc is correct, I'll try and
> make sure they all match up.
>
> Anyway, to get to the substantive issue:
>
> OK - yes, I am only seeing +5V on the two outer conectors - J15 and J16,
> but not he middle (slave) one - J7. That appears to be correct from the
> circuit diagram, and makes sense - slave devices (can) take power from the
> host.
>
> IS that the same as you are finding Glen?

exactly.  Could this be cause from not having a module installed or one 
installed incorrectly.  I mean the fact that the USB device isn't recognized?
>
> > When I plug a memory stick into the J15 (A type connector) I was
> > expecting to see data toggling on the +data and -data  lines, but only
> > see between 3.0 and 3.8 volts on the +data line (tried 2 different memory
> > sticks).  Is there a software test I can run to see if those ports are
> > actually working?
>
> I can't replicate this as I don't have an inline USB socket to make up a
> suitable cable with. I'll get one.
>
> Who else has used the USB host functionality on balloon?
>
> Dave your hyra hsa a USB webcam does it not?
>
> > Will the A-type USB port support a USB keyboard as a test?
>
> It should do. It's just a matter of installing the right modules. As even I
> think nick is person who has actually used this most.
>
> > Other suggestions for debugging the USB ports?
>
> For the USB host stuff I can't help much until I sort out a cable.
>
> I'm goingto experiement with the slave stuff some more right now.
>
> Wookey