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Can anyone supply me or direct me to a source that has a 24-bit comparator(GT or LT output) in schematic format for FPGA? I use Xilinx. ThanksArticle: 31226
hamish@cloud.net.au wrote: > > Rick Filipkiewicz <rick@algor.co.uk> wrote: > > extends to V2-4 <=> V-E-7 then I'll gladly pay the extra price. > > Is that roughly right? Virtex-II -4 equivalent to a Virtex-E -7? > > Hamish > -- > Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au> If you look back in this thread you'll see Ausin Lesea saying that the V-2 -5 speed is ``faster'' than the V-E -8 so I extrapolated downwards [destrapolated ?] to the equivalence above. Don't worry Austin we won't absolutely hold you to your statement, we're grown-ups around here - excepting any lawyers who might have wandered in off the playground.Article: 31227
--_NextPart_000090A2-00001B1E-36559C2B-62CF Content-Type: text/plain Content-Transfer-Encoding: 7bit --_NextPart_000090A2-00001B1E-36559C2B-62CF Content-Type: text/plain; name="personalemail.txt" Content-Transfer-Encoding: 8bit Content-Disposition: Attachment; filename=personalemail.txt; size=984 Hi, My name is Nick, I shop on the internet allot! I noticed that I have to go through 20 to 30 links before I can even find the product I am looking for! Then when I find the product I don't even know if it really is a bargain or not! There for I designed a web site that will save you and me hours of time on the Internet to find REAL bargains. Would you be interested to receive a FREE newsletter that will tell you where the REAL bargains are on-line? Interested? Yes, I want to subscribe! visit: http://www.bargainshotline.com Not? Please remove my name from your mailing list. Visit: http://www.bargainshotline.com/unsubscribe.asp Disclaimer ########## Our research indicates the following material is of interest to you. If you prefer not to be on this mailing list, please let us knows, and you will be promptly removed. ************************** Nick@bargainshotline.com Lake Forest,CA 92630 Tel 949.598.0078 Fax 949.598.0585 --_NextPart_000090A2-00001B1E-36559C2B-62CF--Article: 31228
Peter Alfke <peter.alfke@xilinx.com> writes: >This is really a moot discussion. >There is no exact scientific relationship between an ASIC gate count >and the logic implemented on a LUT-based FPGA. The value of a LUT >can vary from 0 to 20 gates! And what's the value of a RAM bit? >And what if it's dual-ported? No, I mean True Dual-Ported ! >And there are lots of things ( DLLs, carry logic, multipliers, >Clock multiplexers etc ) that would not show up in any "gate count". >This leaves the field wide open to Creative Marketing, and the >two main players try to outdo each other. I mostly agree with this. The gate count, as I know it for ASICs, is the number of transistors divided by the number of transistors in a NAND gate. This is hard to apply to an FPGA. The number, though, should fairly represent the number of equivalent gates one might be able to use for a typical design. I don't think the problem is much worse than benchmark speeds for processors. Both depend on the specific application that one is using. Maybe someone (like SPEC) could make a set of benchmark designs that one could synthesize, place, and route. Maybe scalable designs so one could adjust the scale factor to find the largest such design that would fit. -- glenArticle: 31229
Neil Franklin <neil@franklin.ch.remove> writes: >Eric Smith <eric-no-spam-for-me@brouhaha.com> writes: >> Neil Franklin <neil@franklin.ch.remove> writes: >> > Methinks, you do not know, that you can still get TOPS-20 v7.xx >> > together with fitting hardware TOAD-1 [1] (an KL-10 clone with 30bit >> > extended addressing) from XKL (http://www.xkl.com/). >> >> Bzzzt! No longer commercially available. >Not any more? Bummer. >All the more reason for me to get on with my clone then. :-) There is now a software emulator that runs under most unix systems. The remaining bugs are rapidly being worked out. I forget if they have TOPS-20 running yet. Maybe only TOPS-10. See the pdp10 newsgroup. -- glenArticle: 31230
I've got a stupid problem with a counter. The code is written in Altera's AHDL language, and an older version of the code works just fine. I have the feeling that I'm doing something really stupid to cause this problem, and if anyone could point me in the right direction of a solution to it, I'd really appreciate it. The problem is that the FAD outputs seem to glitch a lot. I've only seen single bit glitches. Basically, the counter will do something like count from 1E to 1F, then 3/4 of the way until it should count to 20, it becomes 3F. When the time comes, it then correctly becomes 20. The problem lies in that the rams are always enabled, so these address glitches cause glitches in the ram outputs, which is a BIG problem for the rest of our product. I've attempted adding an extra registration step after the counter (FADCNT_R[].clk = 17_5MHz; FADCNT_R[].d = FADCNT[].q;) but that had NO effect on the problem. As near as I can tell from the timing analysis, there shouldn't be a timing issue (that's why we went with the -1 version of the 10K250). Any and all help GREATLY appreciated. Thanks! Target is an EPF10K250ABC600-1. I've got EPC1 roms in the board, but I'm loading new code via a byteblaster. Software is MAX+plus II version 10.0 9/14/2000 (2000.09) I'm NOT using the quartus fitter. That is because this design has a very bad pin layout and the use of Cliques in the older fitter allows me to get the fits to meet timing much better. I have several Cliques defined, including one that contains all the FAD and FADCNT signals. Here's the relevant parts of the code: (the FAD output runs to the address lines of a set of rams. When it's in count mode, it's clocking pre-loaded data out of the rams). FAD[18..0] : OUTPUT; FADCNT[18..0] : DFF; FADCNT[18..0].clk = 17_5MHZ; -- 17_5MHZ is a 35 MHZ input divided -- by two FADCNT[18..0].clrn = WOODGATE_RR; -- when this signal is not active, -- we don't want to run IF (XMTN_R63) THEN -- XMTN_R63 is a registered copy of an input FADCNT[18..0].d = 0; ELSE FADCNT[18..0].d = FADCNT[18..0].q + 1; END IF; Michael Kohne mhkohne@discordia.org 3000 pound of wood moving at 300 feet per minute. Don't get in the way...Article: 31231
glen herrmannsfeldt wrote: > > Peter Alfke <peter.alfke@xilinx.com> writes: > > >This is really a moot discussion. > >There is no exact scientific relationship between an ASIC gate count > >and the logic implemented on a LUT-based FPGA. The value of a LUT > >can vary from 0 to 20 gates! And what's the value of a RAM bit? > >And what if it's dual-ported? No, I mean True Dual-Ported ! > >And there are lots of things ( DLLs, carry logic, multipliers, > >Clock multiplexers etc ) that would not show up in any "gate count". > >This leaves the field wide open to Creative Marketing, and the > >two main players try to outdo each other. > > I mostly agree with this. The gate count, as I know it for ASICs, > is the number of transistors divided by the number of transistors in > a NAND gate. This is hard to apply to an FPGA. The number, though, > should fairly represent the number of equivalent gates one might be > able to use for a typical design. I don't think the problem is much > worse than benchmark speeds for processors. Both depend on the specific > application that one is using. > > Maybe someone (like SPEC) could make a set of benchmark designs that > one could synthesize, place, and route. Maybe scalable designs so > one could adjust the scale factor to find the largest such design > that would fit. About a decade ago there was a benchmark called "Prep" but it isn't used anymore. I'm not quite sure why, but I think it had something to do with Prep not being a realistic measure of the performance of a part. IIRC, one of the measures was the number of 16 bit counters that would fit. Obviously, this mapped quite well to one particular vendor's part that has groupings of 16 flip flops. I propose a new benchmark: the number of traffic light or vending machine controllers that will fit in the FPGA. :) Regards, Allan.Article: 31232
On Tue, 15 May 2001 16:33:36 +0200, "Noddy" <g9731642@campus.ru.ac.za> wrote: >Hi, > >Sorry, new at designing on FPGA's. I have made a design with two macro >symbols, the first driving the second. Simulation by themselves works fine, >but as soon as I connect the first macro to the second, it appears the the >outputs of the first symbol can't drive the second - could be due to excess >circuitry etc. Thus, the outputs just go to X when they are supposed to go >high. > >What is the most common technique on FPGA's to rectify this problem? > >adrian > > Usually there is no limit for how many signals can be driven by a signal during simulation. I think you must have done a mistake elsewhere. If you give us more information maybe someone can help you better. Best regards Falser Klaus R&D Electronics Department Company : Durst Phototechnik AG Vittorio Veneto Str. 59 I-39042 Brixen Voice : +0472/810235 : +0472/810111 FAX : +0472/830980 Email : kfalser@IHATESPAMdurst.itArticle: 31233
Brian, I am not an FPGA expert, but was rather interested in this discussion. Brian Philofsky wrote: > > Meelis, > <SNIP> > As far as I know, > VHDL attributes are ignored by most simulators and therefore can not pass > information to simulation models however generics can. I think you are correct, but why can't a simulator "understand" attributes - I remember reading that attributes are mainly used by Synthesis tools, but essentially it is a VHDL compiler's job to interpret these attributes - am I right? If so IMHO a simulator in principle *CAN* understand attributes. They don't is a different issue. Could someone explain if there is any problem with this? TIA Srini -- Srinivasan Venkataramanan (Srini) ASIC Design Engineer, Chennai (Madras), IndiaArticle: 31234
In article <3B02220A.790435AC@realchip.co.in>, Srinivasan Venkataramanan <srini@realchip.co.in> writes >Brian, > I am not an FPGA expert, but was rather interested in this >discussion. > >Brian Philofsky wrote: >> >> Meelis, >> ><SNIP> > >> As far as I know, >> VHDL attributes are ignored by most simulators and therefore can not pass >> information to simulation models however generics can. > > I think you are correct, but why can't a simulator "understand" >attributes - I remember reading that attributes are mainly used by >Synthesis tools, but essentially it is a VHDL compiler's job to >interpret these attributes - am I right? If so IMHO a simulator in >principle *CAN* understand attributes. They don't is a different >issue. > >Could someone explain if there is any problem with this? > >TIA > >Srini > My guess is that (as Microsoft always say) "this behaviour is by design", i.e. attributes are intended for annotating arbitrary information on to objects in VHDL, but are not intended for altering the behaviour of simulation. Though when you read the standard, it doesn't say that, and clearly the built-in attributes *do* have an effect on simulatin. I suppose simulators could look at attributes, but if they did it would be nice to have a standard so that all simulators understood the same attributes! regards Alan -- Alan Fitch DOULOS Ltd. Church Hatch, 22 Market Place, Ringwood, Hampshire BH24 1AW, United Kingdom Tel: +44 1425 471223 Email: alan.fitch@doulos.com Fax: +44 1425 471573 Web: http://www.doulos.com ********************************** ** Developing design know-how ** ********************************** This e-mail and any attachments are confidential and Doulos Ltd. reserves all rights of privilege in respect thereof. It is intended for the use of the addressee only. If you are not the intended recipient please delete it from your system, any use, disclosure, or copying of this document is unauthorised. The contents of this message may contain personal views which are not the views of Doulos Ltd., unless specifically stated.Article: 31235
In article <2kn2gt8nnns5hat9q5bsaqseo2t4vll9aq@4ax.com>, Muzaffer Kal <muzaffer@dspia.com> writes >On Tue, 15 May 2001 11:21:33 +0200, Roy Shoshani <roy@harmonic.co.il> >wrote: > >>What is the difference between Level 1 and Level 3 Version in Leonardo >>Spectrum (Exemplar Logic)? > >Level 3 has asic synthesis option. Level 1 & 2 are for strictly fpga. >1&2 probably has optimization capability differences. > >Muzaffer > >FPGA DSP Consulting >http://www.dspia.com Also Level 1 is the "OEM" version, and is limited to target just one technology (depending on who the OEM is of course!) Alan -- Alan Fitch DOULOS Ltd. Church Hatch, 22 Market Place, Ringwood, Hampshire BH24 1AW, United Kingdom Tel: +44 1425 471223 Email: alan.fitch@doulos.com Fax: +44 1425 471573 Web: http://www.doulos.com ********************************** ** Developing design know-how ** ********************************** This e-mail and any attachments are confidential and Doulos Ltd. reserves all rights of privilege in respect thereof. It is intended for the use of the addressee only. If you are not the intended recipient please delete it from your system, any use, disclosure, or copying of this document is unauthorised. The contents of this message may contain personal views which are not the views of Doulos Ltd., unless specifically stated.Article: 31236
Hi. I'm evaluating Handel C, (DK1 eval), and believe one of the Tutorial Examples is being simulated wrongly. I'm playing with example 3, (queue), and am seeing the following in simulation: State 0 State 1 State 2 State 3 Clk 1 0 0 0 0 2 0 0 0 0 3 0 0 0 0 4 97 0 0 0 5 97 0 0 0 6 97 0 0 0 7 97 97 97 97 (please excuse the shabby table!) Would I be right in thinking that this is wrong? I assumed that the 'state' variables map to registers, and the channels map to drivers. Any help appreciated, BrenArticle: 31237
Hi I am trying to build a functionality around xc9500xv family of CPLDs. It requires interfacing the CPLD to keyboard and seven segment displays. If anyone has a prior experience interfacing a keyboard and/or seven segment display to this family of CPLDs, I am looking forward to your advice Thanking you in anticipation bhupesh bhupeshr@softhome.netArticle: 31238
Please ignore the above post - my mistake! "Brendan Lynskey" <brendan.lynskey@pace.co.uk> wrote in message news:9dti6a$abc$1@nh.pace.co.uk... > Hi. > > I'm evaluating Handel C, (DK1 eval), and believe one of the Tutorial > Examples is being simulated wrongly. > > I'm playing with example 3, (queue), and am seeing the following in > simulation: > > State 0 State 1 State 2 State 3 > Clk > > 1 0 0 0 0 > 2 0 0 0 0 > 3 0 0 0 0 > 4 97 0 0 0 > 5 97 0 0 0 > 6 97 0 0 0 > 7 97 97 97 97 > > (please excuse the shabby table!) > > Would I be right in thinking that this is wrong? I assumed that the 'state' > variables map to registers, and the channels map to drivers. > > Any help appreciated, > > Bren > > > >Article: 31239
Rick Filipkiewicz wrote: > For some time now I've noticed that every now & again PAR would hang up > in the ``route PWR/GND'' phase of iteration 2. Or, at least, progress > would slow to a crawl. Since I've only got 722 such connections none of > the answers on the web seemed at all relevant. Rick, If I remember correctly, there was a discussion on PWR/GND distribution at this newsgroup long ago (I don't know if you can find these postings in http://groups.google.com (formerly http://www.deja.com) since they lost old mails or whatever). Can it be the problem how PWR/GND is modelled in HDL? Maybe 722 PWR/GND connections is used from only one Verilog assignment. Or, are these potentially unroutable connections centralized within some small region (module) of the chip? Maybe warning/errors of unrouted PWR/GND might inform on it. UtkuArticle: 31240
Allan Herriman wrote: > > glen herrmannsfeldt wrote: > > > I propose a new benchmark: the number of traffic light or vending > machine controllers that will fit in the FPGA. :) > > Regards, > Allan. Nice idea &, since we are now in the 21st century, I propose that this becomes a multi-media benchmark. So that it can be easily determined if anyone's faking it (1) Each of the traffic light controllers should be connected to an output that drives one of those combined red/yellow/green LEDs. (2) Each vending machine should have a simple audio synthesiser to give realistic sounds of coins going in, the item required falling into the out tray, the item shooting out of the slot & smashing on the floor because the flap had stuck open, the machine having the ^%$*& kicked out of it when the coins jam due to a metastability error in the code. This last should also apply to the traffic light controller with sounds of multiple pile-ups and agruments between drivers ending in outbursts of mindless violence.Article: 31241
Utku Ozcan wrote: > > Rick Filipkiewicz wrote: > > > For some time now I've noticed that every now & again PAR would hang up > > in the ``route PWR/GND'' phase of iteration 2. Or, at least, progress > > would slow to a crawl. Since I've only got 722 such connections none of > > the answers on the web seemed at all relevant. > > Rick, > > If I remember correctly, there was a discussion on PWR/GND distribution > at this newsgroup long ago (I don't know if you can find these postings > in http://groups.google.com (formerly http://www.deja.com) since they lost > old mails or whatever). > > Can it be the problem how PWR/GND is modelled in HDL? Maybe 722 PWR/GND > connections is used from only one Verilog assignment. Or, are these > potentially unroutable connections centralized within some small region > (module) of the chip? Maybe warning/errors of unrouted PWR/GND might > inform on it. > > Utku But, Utku, why only on a Sunday ?Article: 31242
cyber_spook wrote: > > I have a question regarding the bit of PCI outside the chip - the bus!? > > I know that running at 33/66 Mhz is entering the RF range of problems - > but how far can I push it, and it still work? > > It should reay have a short bus with minimal stubs to each card / device > as you see in a standard pc, with good grouding and tracks layed > correctly. corret? > > But..... > > and here are my questions:- > > How long can the bus be at 66Mhz? > How much veriation in track length can I have? (1 inch, 5 inch, 10inch > difference?) > How long can a stub be? (1 inch, 5 inch?) > How close can I lay tracks to each other or other data lines without > cross talk? > What problems am I ligthy to see? bit errors, parity etc? > > also... If I have one device that is 32bit and three that are 64bit - > should the 32bit device sit in the middle or can it sit off one end (ie > extending the lower part of the bus beond the top 32bits)? > > And lastly - is there somwhere I can find this information? > > Many - Many thanks > > cyber_spook_man Hi, my PCI specs are gone walking so I can't check right now. You can buy them from www.pcisig.org. IIRC, the tracks on your card should be routed above a continuos power plane and must be shorter than 1 inch. The PCI clock signal must be 1.5 inches long. All signals drive exactly one CMOS input. I might be completely wrong. Regards, IwoArticle: 31243
Hi, I have to use a FPGA on an industrial card ( production : 1500 per year ). I have the following choice : - 1 Altera's APEX 200KE in BGA - 2 Altera's APEX 100KE in PQFP. My main constraint is the cost and i'm wondering for the total cost of the project : - Is the total card surface of the BGA chip equivalent to the 2 PQFP card surface ( due to signal dispatchment ) - Is the card fabrication more expensive due to BGA use ( process, tools, mount, etc .... ) - Is the card's test more expensive due to BGA use ( tools, measures etc.... ) With my client's negociated prices, the APEX 200 is 30% more expensive than the total cost of the 2 APEX 100 !!!! If anyone has some knowledge on BGA industrialisation ! S.JArticle: 31244
Thank you to all who offered feedback regarding my original Web Page. All your comments were justified. The one thing I've learnt from this exercise is that if you post to newsgroups you must expect to be crucified if you 'do' or 'say' anything slightly wrong. I feel that it's unlikely that good comments are ever made through this type of media. It's a bit like newspapers, they print more 'bad news' than 'good' - it sells more copies. People get more enjoyment out of 'critism' than 'praise'. So I've taken onboard all your comments and have revised the original Web Page at: http://www.Twyman.org.uk/PL-Sequencer Comments again please... Thanks everybody. Harvey Twyman __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/ -- Posted from web3501.mail.yahoo.com [204.71.203.68] via Mailgate.ORG Server - http://www.Mailgate.ORGArticle: 31245
Hi Michael, Why you just don't use the lpm_counter megafunction? Simple example is listed below. -------- include "lpm_counter"; variable FADCNT : lpm_counter with (lpm_width=19); RESULT[18..0] : node; begin FADCNT.clock=17_5MHZ; FADCNT.aclr=not WOODGATE_RR; FADCNT.sclr=XMTN_R63; RESULT[18..0]=FADCNT.q[18..0]; end; Valeri Serebrianski. >===== Original Message From Michael Kohne <mhkohne@discordia.org> ===== >I've got a stupid problem with a counter. The code is written in >Altera's AHDL language, and an older version of the code works just >fine. I have the feeling that I'm doing something really stupid to >cause this problem, and if anyone could point me in the right >direction of a solution to it, I'd really appreciate it. > >The problem is that the FAD outputs seem to glitch a lot. I've only >seen single bit glitches. Basically, the counter will do something >like count from 1E to 1F, then 3/4 of the way until it should count to >20, it becomes 3F. When the time comes, it then correctly becomes 20. >The problem lies in that the rams are always enabled, so these address >glitches cause glitches in the ram outputs, which is a BIG problem for >the rest of our product. > >I've attempted adding an extra registration step after the counter >(FADCNT_R[].clk = 17_5MHz; FADCNT_R[].d = FADCNT[].q;) but that had NO >effect on the problem. > > >As near as I can tell from the timing analysis, there shouldn't be a >timing issue (that's why we went with the -1 version of the 10K250). > >Any and all help GREATLY appreciated. > >Thanks! > > > > >Target is an EPF10K250ABC600-1. I've got EPC1 roms in the board, but >I'm loading new code via a byteblaster. > > >Software is MAX+plus II version 10.0 9/14/2000 (2000.09) >I'm NOT using the quartus fitter. That is because this design has a >very bad pin layout and the use of Cliques in the older fitter allows >me to get the fits to meet timing much better. I have several Cliques >defined, including one that contains all the FAD and FADCNT signals. > >Here's the relevant parts of the code: >(the FAD output runs to the address lines of a set of rams. When it's >in count mode, it's clocking pre-loaded data out of the rams). > >FAD[18..0] : OUTPUT; > >FADCNT[18..0] : DFF; > >FADCNT[18..0].clk = 17_5MHZ; -- 17_5MHZ is a 35 MHZ input divided > -- by two > >FADCNT[18..0].clrn = WOODGATE_RR; -- when this signal is not active, > -- we don't want to run > >IF (XMTN_R63) THEN -- XMTN_R63 is a registered copy of an input > FADCNT[18..0].d = 0; >ELSE > FADCNT[18..0].d = FADCNT[18..0].q + 1; >END IF; > > > >Michael Kohne >mhkohne@discordia.org >3000 pound of wood moving at 300 feet per minute. Don't get in the >way... ------------------------------------------------------------ Get your FREE web-based e-mail and newsgroup access at: http://MailAndNews.com Create a new mailbox, or access your existing IMAP4 or POP3 mailbox from anywhere with just a web browser. ------------------------------------------------------------Article: 31246
I'm trying to use a dual port RAM generated by the Xilinx Core Generator for a Spartan-II. Does anybody knows how to create a component from the VHO file with Renoir (I use Leonardo for synthesis)? Thanks, Jean-Pierre Gehrig Design Engineer HEVs SwitzerlandArticle: 31247
On Wed, 16 May 2001 09:03:30 -0400, Valeri Serebrianski <serebr@MailAndNews.com> wrote: >Hi Michael, >Why you just don't use the lpm_counter megafunction? >Simple example is listed below. >-------- >include "lpm_counter"; > >variable >FADCNT : lpm_counter with (lpm_width=19); >RESULT[18..0] : node; > >begin >FADCNT.clock=17_5MHZ; >FADCNT.aclr=not WOODGATE_RR; >FADCNT.sclr=XMTN_R63; >RESULT[18..0]=FADCNT.q[18..0]; >end; > >Valeri Serebrianski. > >>===== Original Message From Michael Kohne <mhkohne@discordia.org> ===== >>I've got a stupid problem with a counter. <snip> Well, the code was originally written by a contractor who didn't have much knowledge of LPM, so he didn't use the lpm functions. I have (just a few minutes ago) converted to using an LPM counter, as a test to see if it makes things any better. Thanks! Michael Kohne mhkohne@discordia.orgArticle: 31248
Dear All, I have been asked by the FPGA developers at my company to recommend a suitable platform and configuration to minimise the time they have to spend waiting for XILINX compilations. They currently have to wait around 8 hours. We tried a P4 with RAMBUS memory, but the performance increase over a P3 wasn't that great. Any ideas ... my boss gave me this brief. Thanks, Andrew Webb Thales Defence ...... Our Software Xilinx Foundation 3.1I with SP7 Devices Devices are xcv1000, xcv1600e-6 The Problem Our iteration cycles can take up to 8 hours (includes our final timing constraints). We currently use Intel PIII 800MHz to 1GHz PCs. Our Initial Solution Part 1 We purchased a HP Vectra 800VL which is an Intel 1.5GHz P4, 0.5GB RAM (400MHz Front Side Bus), SCSI 160 Controller. The initial installation was a problem but we found the fix on your Web Site (java error) and then found that our expectation of much reduced compilation times was not met. Design 1 (See Mapping Report File) took 3 hours 18min on a PIII and 2 hours 40min on a P4. We were hoping for much more as we were assuming the 400MHz FSB would improve CPU to Memory operations during compilation. We now understand that you are releasing a new version of Xilinx that will be optimised for P4 architectures in August. Part 2 We have since been steered towards the AMD processors, which we are testing today. Our Aim We need to reduce this iteration time to allow us to make more changes to our designs within one day. Currently we are relaxing the timing constraints during the initial stages, but having to then place our final constraints within the design to meet the overall system requirements. This is where the compile time increases to 8 hours. Our Questions Can you advise on the compilation platforms to yield the best performance, short and long term. Have you any hint or tips on Operating System optimisation or choice of O.S. I want to take a more strategic view of this issue and formulate plan for when we begin using even bigger gate Arrays.Article: 31249
Hello everyone! Open cores group has published a design guideline document, to help members of the group code HDL in similar fashion. Any comments on it would be appreciated: http://www.opencores.org/guidelines.shtml Anyone with experience in HDL design is welcome to comment on this, so we can prepare a solid and good design guideline document and minimize problems that come up with different approaches to HDL coding. That document is important to us, since many people with different backgrounds participate in same design, so we have to standardize HDL coding somehow (easier simulation, implementation etc.). Thanks for your help, Miha Dolenc
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