[time-nuts] GPS / GNSS front-end board

Peter Monta pmonta at gmail.com
Wed Jun 6 17:08:58 UTC 2012


On Wed, Jun 6, 2012 at 9:33 AM, Eric Garner <garnere at gmail.com> wrote:
> On Tue, Jun 5, 2012 at 12:53 PM, Attila Kinali <attila at kinali.ch> wrote:
>> On Tue, 05 Jun 2012 15:40:48 -0400
>> Michael Tharp <gxti at partiallystapled.com> wrote:
>>
>>> On 06/05/2012 03:31 PM, Attila Kinali wrote:
>>> > * The XC6SLX9 is<10USD more expensive than the SLX6. I think the added
>>> >    value of having twice as much "real estate" would justify the additional
>>> >    price.
>>>
>>> Some vendors don't even stock the SLX6, including Digi-Key! Agreed
>>> though, it would be neat if a CPU capable of doing fixes could be fit
>>> onto the FPGA alongside. Might be impractical though, a DSP would
>>> probably be more appropriate. Still, from what I can tell a FPGA makes a
>>> decent PPS-level phase comparator. You can even gang them up with a
>>> phase-shifted clock to get finer resolution.
>>
>> Yes, there are at least half a dozen ways i can think of to use this
>> board in combination with other boards or various uC and DSPs. And
>> everyone has their own pet uC/DSP/board that he'd like to use.
>> Thus i think some easily accessible header pins would be better than
>> putting a uC directly on the board.
>>
>>> > How about design tools for the FPGA? As far as i can tell, the ISE WebPack
>>> > does not support the Spartan 6 family.
>>>
>>> WebPack does support XC6, or at least the mid-range parts and below. I
>>> have a XC6SLX45 dev board and have no problems generating bitstreams.
>>
>> Cool. It thought it was strange that the WebPack FAQ listed only spartan3.
>> But i couldnt find any other reference listing the supported FPGAs.
>>
>>                        Attila Kinali
>>
>>
>> --
>> Why does it take years to find the answers to
>> the questions one should have asked long ago?
>>
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>
> I just accessed the book on SpringerLink and it looks fantastic.
> Fortunately my company's library lets me have full access to the text
> of the book. However, it does not appear that they let me download the
> matlab code that comes on the CD that comes with the book. do you know
> if it's available somewhere?
>
>
>
> --
> --Eric
> _________________________________________
> Eric Garner
>
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