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Re: [Xylo-SDR] Xylo
Folks
Every day I carry my Xylo around and pop it out when I have time. Yesterday
I got the Wolfson parts and DANG this is gonna be a problem! These things
are SMALL! How in the heck are we going to prototype these things? I grew up
in a world of leads and vacuum tubes! (smile). I searched around for
carriers and stuff and everything seems pretty expensive for these small
parts. We could produce a run of inexpensive carriers with caps and critical
lead length components on the carrier. We gotta do something to make it a
little easier to handle these itty bitty peppercorns! I know that Bill -
KD5TFD has done a lot of this and has some small prototype board sources.
I like the idea of soldering the headers to the bottom of the board. Think
I'll do that on the Saxo.
I suggest a Teamspeak session on Saturday night for anyone interested in
discussing how we get started experimenting! Same time as on Friday's
Flex-Radio-Friends Forum.
I think if we brainstorm this we can get something going, which helps
everyone in the group.
Thanks
Eric
-----Original Message-----
From: xylo-sdr-bounces@lists.ae5k.us [mailto:xylo-sdr-bounces@lists.ae5k.us]
On Behalf Of Phil Harman
Sent: Wednesday, December 14, 2005 6:20 AM
To: Xylo-SDR Discussion
Subject: Re: [Xylo-SDR] Xylo
Cecil,
Please add a few LEDs, I find them invaluable for debugging the Xylo (rather
like watching the heaters in a tube - lets you know that at least something
is working!)
Phil... VK6APH
----- Original Message -----
From: "ecellison" <ecellison@comcast.net>
To: "'Xylo-SDR Discussion'" <xylo-sdr@lists.ae5k.us>
Sent: Wednesday, December 14, 2005 7:03 AM
Subject: Re: [Xylo-SDR] Xylo
> Cecil
>
> Yes, depending on how and when we actually define the project and what we
> expect to accomplish, the I2C port, and the high speed usb port is all we
> need in development. We realy only need a few pins on the Altera (at this
> point for what has been suggested) Probably for the GPS input and 200 mhz
> clock counter from the SDR - 1000. The Microchip I2C 16 bit I/O ports
> about
> a buck are all the I/O I think we will need on a designed board. This is
> just assuming the SDR-1000 but obviously we can do a lot more with this
> development system.
>
> Eric
>
>
> -----Original Message-----
> From: xylo-sdr-bounces@lists.ae5k.us
> [mailto:xylo-sdr-bounces@lists.ae5k.us]
> On Behalf Of KD5NWA
> Sent: Tuesday, December 13, 2005 1:07 PM
> To: Xylo-SDR Discussion
> Subject: Re: [Xylo-SDR] Xylo
>
> A USB2 port to talk to the PC, a I2C port to talk to the A/D and D/A
> chips, and a bunch of I/O pins, what else do we need?
>
> Maybe a second I2C header (2 bits + header), one for A/D the other
> for slower peripheral I/O scattered through a system? That doesn't
> cost much. Or perhaps a I2S interface (3 bits + header), some A/D and
> codec devices require I2S instead of I2C. These items are mostly
> implemented in the FPGA but it would be nice to have the connector on
> board.
>
> A Ethernet 100T port? That would be nice, but can be added in
> afterwards (2 bits + magnetic jack or a add-on board) at slightly
> more expense compared to built in.
>
> Let us not forget a program to make the thing do something useful.
>
> I've been reading up on Verilog, the language is starting to make
> sense, scary thought. Too bad it didn't exist when I was working as a
> Engineer (up to 1983) it would have made life easier.
>
>
> At 11:05 AM 12/13/2005, you wrote:
>>----- Original Message -----
>>From: <mailto:kd5nwa@cox.net>KD5NWA
>>To: <mailto:xylo-sdr@lists.ae5k.us>Xylo-SDR Discussion
>>Sent: Tuesday, December 13, 2005 4:30 PM
>>Subject: Re: [Xylo-SDR] Xylo
>>
>>By the way the Saxo board uses the Altera's Cyclone FPGA EP1C3T100
>>so your board with the Cyclone II will be the developers hot-rod.
>>
>>I just noticed that. The Saxo appears to be more of a basic system
>>than the Xylo board, with much less stuff on it, and a lot cheaper.
>>
>>I've got one of the Xilinx/Digilent Spartan 3 kits with a -400 part.
>>It was only $125 from Digilent. It's better in some ways than the
>>Xylo board, but doesn't have USB.
>>
>>My Cyclone II chips have been shipped, according to FedEx. They
>>haven't left Memphis, yet, so I probably won't get them for a couple of
> days.
>>
>>Leon
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>
>
> Cecil Bayona
> KD5NWA
> www.qrpradio.com
>
> I fail to see why doing the same thing over and over and getting the
> same results every time is insanity: I've almost proved it isn't;
> only a few more tests now and I'm sure results will differ this time ...
>
>
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