[Nut-upsuser] HID PDU implementation [WAS: 24V DC ATX PSU with limited UPS functionality over USB]

Charles Lepple clepple at gmail.com
Wed Apr 30 20:46:43 UTC 2008

On Tue, Apr 29, 2008 at 3:33 PM, Michelle Konzack
<linux4michelle at freenet.de> wrote:
> Hello Charles,
>  Am 2008-03-13 19:27:27, schrieb Charles Lepple:
>  > Another advantage of going the HID PDC route (regardless of whether
>  > NUT is involved) is that the device is essentially self-describing. If
>  > the first version does not have a shutdown flag, but later versions
>  > do, then very little driver code needs to change - just device
>  > firmware.
>  >
>  > Also, I believe that GNOME has a power monitor that works with HID PDC
>  > devices out-of-the-box, which would be another bonus feature if you go
>  > down the USB route.
>  Now I have read Tonns of documents and i am puzzeling  arround,  HOW  to
>  implement the HID PDC stuff in my PDU.  Can you tell  me,  where  I  can
>  find documents and maybe example source codes for the implementation?

The PDC spec: http://www.usb.org/developers/devclass_docs/pdcv10.pdf

Not sure where to find source examples - of course, it would depend on
the microcontroller. There was a SourceForge project a while back for
adapting old Sun keyboards and mice to HID input devices, though -- if
you can't find it, let me know, but I don't have it bookmarked

- Charles Lepple

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