FPGA Central

hi....I want to implement Sigma Delta ADC in Spartan 3E starter
kit....i have implemented it as xilinx's xapp-155.....in ise it works
well for 8 bit....but give problem for 16 bit.....When i open it in
sysgen it now work.......actually in program the dac.v is
included......i dont know how to open that include file in
sysgen....please help........if any one have verilog or vhdl code for
that please send me........and i want to interface the exeternal ADC
also.....so please help me......

krunal wrote:
> hi....I want to implement Sigma Delta ADC in Spartan 3E starter
> kit....i have implemented it as xilinx's xapp-155.....in ise it works
> well for 8 bit....but give problem for 16 bit.....When i open it in
> sysgen it now work.......actually in program the dac.v is
> included......i dont know how to open that include file in
> sysgen....please help........if any one have verilog or vhdl code for
> that please send me........and i want to interface the exeternal ADC
> also.....so please help me......

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?

Syms,

Morose vode?

Austin

austin wrote:
> Syms,
>
> Morose vode?
>
> Austin

I was inspired by this:-
http://www.youtube.com/watch?v=q9v3C08oLqA

Sorry!
Syms.

Syms,

Thanks! Wonderful.

In all seriousness, I would suggest we treat the newbies with a little
more patience. It isn't easy starting out in this field. I know these
folks will not become your customers, but they might someday be mine.

Austin

austin wrote:
> Syms,
>
> Morose vode?
>
> Austin
Your code says newsgrouop. I always thought that
we spelled things the same in morse and in english.

I got my license fifty years ago next month but it
has been a long time since I received code.

None,

I can proficiently miss-spell at close to 18 WPM!

My wife and I got our licenses not long after October 17, 1989...

The Loma Prieta earthquake fault line is ~ 1.5 miles due south of my house.

I didn't get home for 12 hours, and then once home, the secondary
faulting and collapse of roads and bridges left us alone for five days.

No electricity (no water, no heat, no A/C).

I just told the kids it was an extended camping trip (kerosene lanterns,
picnic table in the garage, along with the white gas camp stove). My
wife's parents sent by UPS bottled water, tp, and some other incidentals
(remember UPS and FedEx are allowed through to deliver in a disaster
zone, and they will deliver if they can!).

1 in 5 of my neighbors lost their homes.

We just lost all the dishes.

My wife's description was "first the wall hit me, then the floor hit me,
and then the wall hit me again."

So, a ham license had been on my list since I was 14, and I finally
learned the code, and got it. My wife got the "tech Plus" no-code
license (now code is not required for any license class).

Where we live, we get 'Biblical' proportion disasters: fire, flood
(mud-slide), windstorm (127 MPH this last January), snow (since it
hardly ever snows, this can be a disaster), earthquake, ... let's see,
so far no plague, and no pestilence. Maybe next year?

Just remember: the first thing to go out in ANY emergency, is the cell
phone system. The Department of Homeland Defense strongly recommends a
ham license, for anyone serious about being ready for a disaster (or
working with disaster response professionals). The DHS has provided
funds for local repeaters, training, etc. They certainly recognize a
good thing when they see it.

http://www.arrl.org/FandES/field/pscm/sec1-ch1.html

Hams aren't stupid, we know we get our many MHz of spectrum at the
pleasure of our country, so many of us actively give back by
volunteering for emergencies, and supporting our local agencies.

In my "ham life" I have trained people to be professional communicators
in the event of an emergency for Santa Cruz ARES, and I have volunteered
for the County Sheriff's Department since I was licensed as a "Net
Command" (what they call their radio dispatch for an "incident").

I encourage everyone to think about a ham license, anywhere you are in
the world, as when all else fails, we get through.

http://norfolk-ares.org/news.htm

(typical of what hams do every time the lights and phones go out)

Austin, AB6VU (QTH: CM97fb)

Austin,

It's great the things that you do outside Xilinx (also). I just feel
for anyone trying to understand your dots and dashes since you
corrected your "neusgrouop" to "neusgruop." :-)

Your wife's description of that quake was hysterical!

..... .- .--. .--. -.--
...-. .-. .. -.. .- -.--
- John_H

John,

Thanks. My point (to anyone who cares) is that in the event of an
emergency, even Morse code still has a real place in the world (not just
in the movies).

And, yes, getting the Morse right in the subject box is tough, on my
monitor it is 8pt font, and hence unreadable.

So, no more Morse (except on my keyboard and computer at home).

Did you know that S.F.B. Morse himself was unable to decode his own code
by ear? He had to see it on a printed strip of paper.


Keyboard? Computer? Morse?

Yup, hams have made it to the 21st century. Most hams use an ascii
keyboard to Morse code generator, so I can type as I am typing now, and
send the code (without mistakes).

And, at the other end, the sound-card in the PC has a nice program that
slices and dices the received audio, and provides the ascii right back
out. Now the receiver program is not as good as the human brain-ear,
but the programmers get better all the time, and before long, there will
be a "Morse code" MODEM that is as good as the human, or better.

Already we hams have 'digital' modes, such as PSK31, which is able to
receive below the signal to noise ratio of the human ear-brain!

http://en.wikipedia.org/wiki/PSK31

However, you can't decode it without a computer and sound-card. Morse
does have the advantage that when the computers won't or don't work,
your brain still is working.

The '31' is the 31Hz wide spectrum the signal occupies, so it is
efficient, too.

Austin

austin wrote:
> Syms,
>
> Thanks! Wonderful.
>
> In all seriousness, I would suggest we treat the newbies with a little
> more patience. It isn't easy starting out in this field. I know
> these folks will not become your customers, but they might someday be
> mine.
>
> Austin

Austin,

I gratefully accept the rebuke.

In mitigation for my actions, I worry this newsgroup could turn into
something as useless as sci.whatever.idiots which I occasionally get
subjected to because of thoughtless cross postings.

I've personally learnt a lot through this newsgroup over the years, from
some very smart folks. I've learnt from you too. (Kidding!) It would be a
terrible shame if smart folks stopped contributing because of people who
can't even take the courtesy to post coherently.

So, try this link, but, at the end, substitute 'comp.arch.fpga' for 'New
Scientist' and 'FPGAs' for 'science'!
http://www.youtube.com/watch?v=-_2xGIwQfik

Cheers, Syms.

p.s. Are you any good on an Aldiss Lamp?

Symon,

I sometimes feel impatient, and react poorly to posts where 10 minutes
with Google, and the poster would have their answer.

However, I feel that we should all be patient. We were all ignorant at
one time.

There is no supported forum for students, and those wishing to learn
about FPGAs. One of their only resources is this newsgroup.

As for semaphores and Aldiss Lamps, no, I am not proficient in either.
But we did use an AM modulated laser pens one field day to communicate a
few Km between hilltops (with 1 cm^2 solar cell demodulators).

Austin

"austin" <[email protected]> wrote in message
news:futloc$[email protected]..
> Keyboard? Computer? Morse?
>
> Yup, hams have made it to the 21st century. Most hams use an ascii
> keyboard to Morse code generator, so I can type as I am typing now, and
> send the code (without mistakes).

.....

And to bring it back on topic, FPGA use in ham specific software defined
radio (SDR) is gaining ground and momentum. There's already evidence of that
here on this group.

Mike.
N9XI

MikeWhy wrote:
> "austin" <[email protected]> wrote in message
> news:futloc$[email protected]..
>
>> Keyboard? Computer? Morse?
>>
>> Yup, hams have made it to the 21st century. Most hams use an ascii
>> keyboard to Morse code generator, so I can type as I am typing now, and
>> send the code (without mistakes).
>
>
> ....
>
> And to bring it back on topic, FPGA use in ham specific software defined
> radio (SDR) is gaining ground and momentum. There's already evidence of
> that here on this group.
>
> Mike.
> N9XI
>

Well, does this http://www.andraka.com/shortwave.htm demo project count?
I did it as a demo back in early 2003. It worked surprisingly well
considering there is no analog front end.

"Ray Andraka" <[email protected]> wrote in message
news:3RG%j.77$[email protected]..
> MikeWhy wrote:
>> "austin" <[email protected]> wrote in message
>> news:futloc$[email protected]..
>>
>>> Keyboard? Computer? Morse?
>>>
>>> Yup, hams have made it to the 21st century. Most hams use an ascii
>>> keyboard to Morse code generator, so I can type as I am typing now, and
>>> send the code (without mistakes).
>>
>>
>> ....
>>
>> And to bring it back on topic, FPGA use in ham specific software defined
>> radio (SDR) is gaining ground and momentum. There's already evidence of
>> that here on this group.
>>
>> Mike.
>> N9XI
>>
>
> Well, does this http://www.andraka.com/shortwave.htm demo project count? I
> did it as a demo back in early 2003. It worked surprisingly well
> considering there is no analog front end.

Whoa. What's really impressive is there looks to be room left on that -100
device for a HT and PSK decoder. Or is that block RAM showing in the
FloorPlanner?

Ray wrote:
>
> Well, does this http://www.andraka.com/shortwave.htmdemo project count?
> I did it as a demo back in early 2003. It worked surprisingly well
> considering there is no analog front end.
>

FYI, TI now makes a nifty eval board for their ADS554x family
that includes a 3S250E on board, about $300 USD, that makes for
a great low budget 'SDR' platform:

http://focus.ti.com/docs/toolsw/fold...ds5547evm.html

14-bit, 210 MSPS ADC
XC3S250E with config flash
expansion connectors for spare FPGA I/O

Brian

On Apr 24, 10:40 pm, krunal <krunal.c...@gmail.com> wrote:
> hi....I want to implement Sigma Delta ADC in Spartan 3E starter
> kit....i have implemented it as xilinx's xapp-155.....in ise it works
> well for 8 bit....but give problem for 16 bit.....When i open it in
> sysgen it now work.......actually in program the dac.v is
> included......i dont know how to open that include file in
> sysgen....please help........if any one have verilog or vhdl code for
> that please send me........and i want to interface the exeternal ADC
> also.....so please help me......

Hi Krunal,
I understood you. English is a second language for me as well... Send
me the files or links to them and I can see if I can make any sense
for you... btw a tip... I would try to learn Mandarin instead of
perfecting English.
-sanjay

MikeWhy wrote:
> "Ray Andraka" <[email protected]> wrote in message
> news:3RG%j.77$[email protected]..
>
>> MikeWhy wrote:
>>
>>> "austin" <[email protected]> wrote in message
>>> news:futloc$[email protected]..
>>>
>>>> Keyboard? Computer? Morse?
>>>>
>>>> Yup, hams have made it to the 21st century. Most hams use an ascii
>>>> keyboard to Morse code generator, so I can type as I am typing now, and
>>>> send the code (without mistakes).
>>>
>>>
>>>
>>> ....
>>>
>>> And to bring it back on topic, FPGA use in ham specific software
>>> defined radio (SDR) is gaining ground and momentum. There's already
>>> evidence of that here on this group.
>>>
>>> Mike.
>>> N9XI
>>>
>>
>> Well, does this http://www.andraka.com/shortwave.htm demo project
>> count? I did it as a demo back in early 2003. It worked surprisingly
>> well considering there is no analog front end.
>
>
> Whoa. What's really impressive is there looks to be room left on that
> -100 device for a HT and PSK decoder. Or is that block RAM showing in
> the FloorPlanner?
>
>

Thanks. There are 6 of the Block Rams unused, and a few slices scattered
around. With some thought and a little more optimization work I'm
pretty sure I could get a PSK decoder in there. If I take out the
programmable filters, I could do FM demodulation too (which doesn't need
the programmable filters). It was a fun project. We had a good time
with it at FCCM that year too, tuning broadcasts from Asia with a
long-wire antenna strung out over the courtyard.

Brian Davis wrote:

> Ray wrote:
>
>>Well, does this http://www.andraka.com/shortwave.htmdemo project count?
>> I did it as a demo back in early 2003. It worked surprisingly well
>>considering there is no analog front end.
>>
>
>
> FYI, TI now makes a nifty eval board for their ADS554x family
> that includes a 3S250E on board, about $300 USD, that makes for
> a great low budget 'SDR' platform:
>
> http://focus.ti.com/docs/toolsw/fold...ds5547evm.html
>
> 14-bit, 210 MSPS ADC
> XC3S250E with config flash
> expansion connectors for spare FPGA I/O
>
> Brian


Cool! That would have been nice to have back then. I spent about $400
between the burr brown eval and insight spartanII boards. Having the
whole thing on one board would have been nice.

I did that design in about 3 weeks right before FCCM so that I'd have it
for the demo night. Had I had more time, I was planning to optimize the
design some more so that I could get a frequency display on the LCD on
the board and some sort of interface (I was thinking a computer mouse)
to tune it so that I could do without the laptop. I never got that far
though.

Ray Andraka wrote:
> Well, does this http://www.andraka.com/shortwave.htm demo project
> count? I did it as a demo back in early 2003. It worked surprisingly
> well considering there is no analog front end.

Very cool! Any plans to publish more details of the design?

Best regards,
Eric

Eric Smith wrote:
> Ray Andraka wrote:
>
>>Well, does this http://www.andraka.com/shortwave.htm demo project
>>count? I did it as a demo back in early 2003. It worked surprisingly
>>well considering there is no analog front end.
>
>
> Very cool! Any plans to publish more details of the design?
>
> Best regards,
> Eric


I had been working on a chapter for it in my book. I gave up the book
project because I was finding I couldn't dedicate enough time to it. I
may eventually post more details on that page on my website. I kind of
want to avoid putting the whole thing up there and giving college
students a ready-made project.