Hello!!
I'm doing my first experiments with owfs and a few one-wire devices.
I made a simple interface with the DS2490 USB-to-one-wire-bridge
according to the application notes from dallas.
I was impressed that everything seems to work very fine at first.
But when i moved the Interface hardware t
On Mon, 4 Jun 2007 12:29:07 + (UTC)
Sven Geggus <[EMAIL PROTECTED]> wrote:
> Jan Kandziora <[EMAIL PROTECTED]> wrote:
>
> > Your interface may drain too much power on power-on from your notebook's
> > USB port. Try inserting choke coils into the +5V and GND lines (a few µH).
>
> He might als
On Mon, 4 Jun 2007 15:27:13 +0200
Jan Kandziora <[EMAIL PROTECTED]> wrote:
> Am Montag, 4. Juni 2007 14:29 schrieb Sven Geggus:
> > Jan Kandziora <[EMAIL PROTECTED]> wrote:
> > > Your interface may drain too much power on power-on from your notebook's
> > > USB port. Try inserting choke coils into
> I think "OP" is you. Since this is your circuit, it would be hard to have
> prior
> reports.
Oh, i see. Thought you are talking about somebody else :-).
> OWFS certainly doesn't know or care about hubs -- it just uses libusb to
> enumerate USB devices and libusb for all communication.
Yes tha
Hello Jan!
> OP: original posting/poster.
Okok, i see :-).
> Increasing the capacitors make things *worse*, not better! Empty capacitors
> are like short circuits. You have to limit the current flowing into empty
> capacitors by applying a resistor or (better) a choke coil to the supply
> line
Hello!
I investigated the setup again at last weekend.
Somebody on linux-usb Mailinglist explaind the "failed with status
50" message. And so i decided to check the waveforms on D+ and D-.
I've discovered that there is a complete impedance missmatch between
the ds2490 and the usb-port of this
