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From: Dhawal Kadao<dhawal.kadao@g...>
Date: Wed Sep 19 06:03:12 CEST 2007
Subject: [oc] Who is going to work on cores?
Thanks Balaji,

I will read the documents related to number representations. But one small
question if I need to input the value -0.9425 to my fft core in 16 bit
format what should be my approach.
the twos complement representation of -0.9425 in binary format is
1000011101011100 while 0.9425 in binary format is 0111100010100100. From
this I understand that first bit is the sign bitand rest of the bits
represent the fractional value of the number.

Now the problem is how should I represent 1 and -1.

On 9/18/07, attachment.htm
> > Take a good look at it and it'll answer your question. By the way,
> > integers are integer numbers.... that is: they don't ever have a
> > fractional part.
> > Regards,
> > Víctor López
> > Dhawal Kadao escribió:
> > >
> > > Thanks Balaji,
> > >
> > > I have a problem in deciding the format of the input data
> > stream. How
> > > to set the format while i input the data through Test bench. I
> > am
> > > using twos complement format to input negative numbers.
> > > For example: My data word is 16 bits. So how are the bits
> > assigned?
> > > What I understand is 1 bit is sign bit, one bit for intefer
> > and rest
> > > 14 bits for fractional value. Is this format correct or is
> > there a way
> > > to define the input sequence.
> > >
> > > Regards,
> > > Dhawal.
> > >
> > > On 9/15/07, *rbala4ums at hotmail.com <mailto:rbala4ums at
> > hotmail.com>*
> > > <rbala4ums at hotmail.com <mailto:rbala4ums at
> > hotmail.com>> wrote:
> > >
> > > Hi Kadao,
> > >
> > > Xilinx's IP cores are made so easy that it is very much
> > explanatory on
> > > its own. You can get reference materials on IP cores by doing
> > a
> > > google
> > > search like "Xilinx IP Coregen Memory cores" or blah
> > blah blah....
> > >
> > > if you need info on any particular or specific core, you could
> > > actually open a Xilinx project in ISE, add the core as a
> > component,
> > > and while generating the core using Xilinx's Coregen Wizard,
> > you will
> > > actually see a tab or link stating "More info on the
> > core" if you
> > > click that, the wizard directly opens the pdf doc about the
> > specific
> > > coregen component on a new browser. That is the best way to
> > get info
> > > on any particular core. If you need help on instantiating any
> > core,
> > > you will have to do a google search on some examples.
> > >
> > > There are lots and lots of tutorials written by xilinx, and by
> > > students of many many research groups from various
> > universities that > > > are openly available on the internet, it just matters on what > > kind of > > > key words that you use in google. Better you use, more results > > you > > > get. > > > > > > As i said FFT's and Memory cores are the most popular cores > > that are > > > being used by so many people, so it should be easier to find, > > also you > > > might want to do a search in "Google's Code Search" > > also, you will > > > find so many examples(though most results are from the > > projects of > > > open cores) but you will get some good results on that too. > > > > > > Thanks. > > > > > > Balaji R > > > > > > > > > ----- Original Message ----- > > > From: Dhawal Kadao< dhawal.kadao at g...> > > > To: > > > Date: Fri Sep 14 16:34:56 CEST 2007 > > > Subject: [oc] Who is going to work on cores? > > > > > > > Asim, > > > > > > > > I am working on Xilinx ip cores. I have to use fftcore > > and memory > > > > cores in > > > > my project. I need some reference material and help woth > > my core. > > > > Thanks, > > > > Dhawal. > > > > On 9/13/07, asim shehzad <attachment-0001.html > > > > > > > > > > > _______________________________________________ > > > attachment.htm > > > > > > > > > > > > ------------------------------------------------------------------------ > > > > > > _______________________________________________ > > > attachment.htm > > > > > _______________________________________________ > attachment.htm > -------------- next part -------------- An HTML attachment was scrubbed... URL: attachment.htm

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[oc] Who is going to work on cores?	Rbala4ums