I can sympathize.  We just use an HP logic analyzer here.  It
works OK, but it would be nice to be able to at least log it.

Another suggestion would be to find a protocol analyzer capable of
showing you signal-level USB.  There's a German firm who's name
I'm sorry to say I can't recall that has USB, 1394, and at least
one other protocol analyzer-- they might have something that
would work for you.  The devices they DO have log to a fair chunk
of internal RAM and then dump it back to a host PC.

Check www.usb.org and see if you can find a link to people making
protocol analyzers; they should be listed in there somewhere.

--Matt

> -----Original Message-----
> From: Doug Hewett [mailto:DHewett@STARTRAC.COM]
> Sent: Friday, October 11, 2002 11:43 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [EE]: SPI protocol analyzer
>=20
>=20
> I want to monitor the bi-directional messages on an SPI=20
> interface and record them.
>=20
> As an example from the RS232 environment, I have used an HP=20
> (Agilent) protocol analyzer to show asynchronous,=20
> bi-directional messages.  (In one of the modes, the 'to'=20
> characters displayed in 'white on black' on the even-numbered=20
> lines and 'black on white' on the odd-numbered lines.)  The=20
> operator had the option to save the information to diskette,=20
> which could then be inserted into a PC.
>=20
> I last contacted Agilent about an equivalent product for=20
> Microwire about three years ago.  At that time they did not=20
> offer such a product.
>=20
> My current options are to build or buy.  (We could build one=20
> here, but I would prefer to buy.)
>=20
> Thanks,
>=20
> Doug Hewett
> Software engineer
>=20
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.
>=20
>=20
>=20

--
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