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Guest
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 Posted:
Mon Dec 12, 2005 9:15 am Post subject:
who can help me? i want to know the bitsream format of Virte |
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| if anyone know and is going to give me a hand, many thanks here! |
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Frank
Guest
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| Posted:
Mon Dec 12, 2005 9:15 am Post subject:
Re: who can help me? i want to know the bitsream format of V |
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<lioupayphone@gmail.com> wrote in message
news:1134363621.432976.167570@g44g2000cwa.googlegroups.com...
| Quote: | if anyone know and is going to give me a hand, many thanks here!
|
It's binary format, but you can see the design file name, chip ID and date &
time of creation in the first
64 bytes if you open it in winhex editor. |
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GaLaKtIkUs™
Guest
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| Posted:
Mon Dec 12, 2005 5:15 pm Post subject:
Re: who can help me? i want to know the bitsream format of V |
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Binary format and secret!
Good for protecting designs against piracy but too many problems for
those who want to do dynamic reconf :-(
Mehdi |
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Frank
Guest
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| Posted:
Tue Dec 13, 2005 9:15 am Post subject:
Re: who can help me? i want to know the bitsream format of V |
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"GaLaKtIkUsT" <taileb.mehdi@gmail.com> wrote in message
news:1134403664.635669.155490@f14g2000cwb.googlegroups.com...
| Quote: | Binary format and secret!
Good for protecting designs against piracy but too many problems for
those who want to do dynamic reconf :-(
Mehdi
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Yeah I was aware of that, dynamic reconf is a nightmare. Worked on that
thingy before and never again. |
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Javier Castillo
Guest
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| Posted:
Tue Dec 13, 2005 9:15 am Post subject:
Re: who can help me? i want to know the bitsream format of V |
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On Tue, 13 Dec 2005 15:54:27 +0800, "Frank"
<Francis.invalid@hotmail.com> wrote:
| Quote: |
"GaLaKtIkUsT" <taileb.mehdi@gmail.com> wrote in message
news:1134403664.635669.155490@f14g2000cwb.googlegroups.com...
Binary format and secret!
Good for protecting designs against piracy but too many problems for
those who want to do dynamic reconf :-(
Mehdi
Yeah I was aware of that, dynamic reconf is a nightmare. Worked on that
thingy before and never again.
Is not so difficult, is question of patiente and experience and know |
very well what you are doing.
Javier |
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Ray Andraka
Guest
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| Posted:
Tue Dec 13, 2005 5:16 pm Post subject:
Re: who can help me? i want to know the bitsream format of V |
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Javier Castillo wrote:
| Quote: |
Is not so difficult, is question of patiente and experience and know
very well what you are doing.
Javier
Patience is an understatement. The tools for partial reconfiguration |
are virtually non-existent. Without suitable tools, using dynamic
partial reconfiguration in a design is a lot of painstaking work, and
with the size of the devices available today is not economically
justified in the vast majority of applications. A comprehensive set of
tools for working with partial reconfiguration could easily change that,
but I don't expect to see the necessary extensions to the tools any time
soon. |
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Antti Lukats
Guest
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| Posted:
Tue Dec 13, 2005 11:49 pm Post subject:
Re: who can help me? i want to know the bitsream format of V |
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"GaLaKtIkUsT" <taileb.mehdi@gmail.com> schrieb im Newsbeitrag
news:1134403664.635669.155490@f14g2000cwb.googlegroups.com...
| Quote: | Binary format and secret!
Good for protecting designs against piracy but too many problems for
those who want to do dynamic reconf :-(
Mehdi
there is some info about the format available :) |
and a utility
http://xilant.com/component/option,com_remository/Itemid,53/func,fileinfo/id,6/
bit2frames can be used to find some bit locations, etc...
supports spartan3 converts .BIT file to redable "frames dump"
antti |
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Symon
Guest
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| Posted:
Wed Dec 14, 2005 1:15 am Post subject:
Re: who can help me? i want to know the bitsream format of V |
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Hi Ray,
I thought you said you already had ISE 8.1? From the press release,
http://www.xilinx.com/prs_rls/software/05114ise8_1i.htm
Industry's Only Partial Reconfiguration Solution
With the 8.1i release, Xilinx has added a new methodology to enhance the
industry's first and only partial reconfiguration solution. Partial
reconfiguration reduces system cost, size, device count, and power
consumption, useful for a wide variety of applications, such as Software
Defined Radio (SDR) and high performance computing. Designers can now
dynamically load different hardware configurations into the same area of the
FPGA while the rest of the device continues running. This real-time
dimension to programmability builds upon field upgradeability and multi-boot
approaches that have enabled many Xilinx customers to boost system
reliability with real-time diagnostics, lower field service costs and extend
the lifespan of existing products in the marketplace.
I fully expect that ISE8.1 has a "comprehensive set of tools for working
with partial reconfiguration" and encourage as many C.A.F. readers as
possible to try it out. I'd appreciate it that if, by any chance, you should
happen to find any slight problems, please report them to Xilinx ASAP so
they're fixed by the time I come to try it.
With apologies for my terrible cynicism, Syms. ;-)
"Ray Andraka" <ray@andraka.com> wrote in message
news:NgAnf.17577$Mi5.17387@dukeread07...
| Quote: | Javier Castillo wrote:
Is not so difficult, is question of patiente and experience and know
very well what you are doing.
Javier
Patience is an understatement. The tools for partial reconfiguration are
virtually non-existent. Without suitable tools, using dynamic partial
reconfiguration in a design is a lot of painstaking work, and with the
size of the devices available today is not economically justified in the
vast majority of applications. A comprehensive set of tools for working
with partial reconfiguration could easily change that, but I don't expect
to see the necessary extensions to the tools any time soon. |
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Ray Andraka
Guest
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| Posted:
Wed Dec 14, 2005 8:49 am Post subject:
Re: who can help me? i want to know the bitsream format of V |
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Symon wrote:
won't until I get the current projects out the door.
As far as the marketing fluff, well, it remains to be seen. Partial
reconfiguration, especially while the clock is running is a can full of
worms. I touch on some of the issues in my 1998 paper on a dynamically
reconfigured video processor. I've tangled with that tough nut. I've
been around the block enough times to know that ver 0.1 of a tool NEVER
hits the mark even though it is ALWAYS touted as the last tool you'll
ever need etc.
If it does half of what it is being touted as doing, it will be a huge
step in the right direction, but even if the tool is perfect I doubt it
will make partial reconfiguration a reality in the vast majority of the
applications out there. Moore's law is making it economically
unjustified in most cases. The engineering time to successfully pull
off partial reconfiguration is quite a bit more expensive than the delta
cost to get into a bigger device. A lot of that is the current state of
the tools for PR, but there is an equally big piece due to the adding
the time dimension to the circuit architecture that makes managing the
PR design considerably harder to do tools or not. Based on the static
designs I have seen turned out by FPGA designers who ought to know
better, I don't see freshly debuted tool taking up enough slack to make
it suddenly easy. Heck, there are enough bugs in the tools for static
designs to keep the hotline employed without introducing the complexity
of a self-modifying design.
OK, time to take off the cynical hat. Yes, partial reconfiguration does
have merit, and there are some applications where it can pay off.
However, anyone planning to do so should take a long hard honest look at
the effort involved before signing up to a budget and schedule to make
it happen. |
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