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Hi Dhawal,

Hi Dhawal,
"How to set the format while i input the data through Test bench?"
What do you mean by that? I don't understand the question.

And yes, in fixed point system, if you use signed convention, usually
"MSB" is the sign bit, and you can set the convention for the input
data, that the core should use, while generating the core.

Your test bench should be the numbers that you want to test, what do
you mean by inputting fractional part? I guess you are getting
confused with number representations, i would suggest reading some
digital systems book, and you would get a better understanding.

Thanks

Balaji R

----- Original Message ----- 
From: Víctor López<victor.lopez@o...> 
To: 
Date: Tue Sep 18 16:33:29 CEST 2007 
Subject: [oc] Who is going to work on cores? 

> Hi Dhawal, 
> 
>  I really do think you should study more carefully the different 
> signed integer notations. For example, just googling for 
> "two's 
> compliment" I found this fairly well explained link: 
> http://en.wikipedia.org/wiki/Two's_complement 
> 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 
> > > 
> > > 
> > _______________________________________________ 
> > http://www.opencores.org/mailman/listinfo/cores 
> > 
> > 
> > 
>
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> > 
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> 
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