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I would like to store user data or configuration data+user data in a PROM that supports a JTAG interface. Do Xilinx PROMs allow one to read back user data using TDO and parse the readback data for useful information? What is the procedure? My application could either have an FPGA associated with the PROM or it could exist standalone, in which case only user data would be programmed into the PROM. Thanks.Article: 95076
Guys, I'm using ISE 7.1.04i . In PAR I get this error:- ERROR:Par:228 - At least one timing constraint is impossible to meet because component delays alone exceed the constraint. A physical timing constraint summary follows. This summary will show a MINIMUM net delay for the paths. The "Actual" delays listed in this summary are the UNROUTED delays with a 100ps timing budget for each route, NOT the achieved timing. However, it's only failing because the tool thinks there's 100ps delay between each element in the carry chains. So, for a 32 bit carry chain the damn thing's subtracting 3.2ns from my timing budget. ISTR having this problem before and fixing it, can anyone remind me, Google couldn't. Similar stuff in another project is fine. TIA, Syms.Article: 95077
Hello everyone While I was browsing the newsgroup, I noticed a lot of junk messages all over the place. Maybe we could get rid of some of them by setting up a newsgroup FAQ. This will hopefully makes things (a little) easier for those of us who use this newsgroup on a daily basis. The topics I had in mind were things like 1. what to NOT post here. you know, things like this hi, my name is XXX and bla bla bla....what is wrong with me code: <followed by 300 lines of badly written poorly formatted brain dead VHDL> 2. how to NOT write your messages. things like "can u ppl help me? cuz i have no time 4 doing it myself" 3. post you should NOT answer (most of the posts in point one plus some stuff that leads to flamewars, you known which ones) 4. most often requested information (good books, links and so on) 5. technical stuff that is good to know for the old and new visitors. so what do you think? your anonymous Dr FAQ PS. we probably need one for the VHDL and Verilog groups too :(Article: 95078
http://www.fpga-faq.org/Article: 95079
On Fri, 20 Jan 2006 10:35:43 PST, mojaveg@mojaveg.iwvisp.com (Everett
M. Greene) wrote:
>Jim Thompson <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> writes:
>> Sheeeesh! If you count the breaks it's even less than 30 hours.
>>
>> When I was doing the big motor control project at Bosch in Bühlertal,
>> Germany, I'd barely get in the door and they'd break for "breakfast".
>
>I would think you should have gone with the flow. If you
>were staying at a hotel, you couldn't get a decent breakfast,
You know not of what you speak. The breakfast buffet at the hotel was
fabulous! In fact all the inns in Bühlertal had great breakfasts.
>so the zweite fruhstuck was needed to get you to lunchtime.
>
>> I finally shamed them into working American hours by walking into the
>> lab and picking up a soldering iron and doing the tech work myself ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
It's what you learn, after you know it all, that counts.
Article: 95080Yes, I KNOW about that one. Do you really think our first time visitors visit that site before doing their first post? Just cross-check the newsgroup and the FAQ and you will notice that people does not seem to care much about that site.Besides, it's on Fliptronics site. They can take it down when ever they want. In any case, you guys could come with comments and suggestions. We could even send them to http://www.fpga-faq.org, if you like that better. By the way, your post reminded me of another thing in this newsgroup I find VERY annoying: people that write you a response that contains a link with no explanation at all. And most of the responses are completely off topic or at best they have misunderstood the question. Is it too much to ask for a decent answer? Did my questions really sound that stupid or do you think I don't know how to use google? (this was a general observation and not really about your post)Article: 95081
In article <dqmerv$c04@xco-news.xilinx.com>, Austin Lesea wrote: > > Not that we will not do what you suggest (someday), but reverse > engineering OTP memory is very cheap, and is considered quite insecure. Sure, a ROM may be such. I dont really care how it's implemented, but if done as a "persistant write-only" area of the FPGA (from a user's point of view)... if that is battery backed ram, flash, whatever. I'll leave the finer details to the VLSI designers... :) > The one time programmable key might be sufficient as a deterrent, and > will certainly slow down the process of ripping off the design. I > agree. But please do not put it forth as being "secure." Ok, more resistant. :) -- [100~Plax]sb16i0A2172656B63616820636420726568746F6E61207473754A[dZ1!=b]salaxArticle: 95082
Peter Alfke wrote: > > Tobias, we love universities and their students and faculty for their > uninhibited free thinking, unburdened by mundane practicality. Ouch. Unfortunately, this is not for university business. > But beware that some of your sentences sound not just enthusiastic and > uninhibited, but also ill informed. Life would be easy if the world > were a simple as you see it. Life can be as simple as you make it. > Of course we have evaluated non-volatile storage on an FPGA, and we > offer a decryption engine in every Virtex-4 device that we ship. With > battery-backed-up SRAM key storage, because we know that Flash storage > offers no security worth talking about. So what you're saying is that for Virtex-4 devices the reason to keep the bitstream format closed has been reduced by one hurdle. :) > And several smart people at Xilinx (and surely also in Altera) are > still thinking very hard about a technically and economically viable > solution. We gladly take advice. But it has to be more substantial than > what you seem to offer. The only advice I was hoping to offer was one of "please reconsider opening the bitstream format". -- [100~Plax]sb16i0A2172656B63616820636420726568746F6E61207473754A[dZ1!=b]salaxArticle: 95083
Hello Chris, > >>I'm not suggesting this is a bad thing - after five years in the US I am >>actively looking for opportunities elsewhere - I just thought it was an >>interesting question. > > It is an interesting question. Part of the answer is to certify or > license engineers the same as in other professions. IE like the PE in > the US and other countries and the C.Eng in the UK and Eur. Ing in > Europe. > That would diminish the talent pool and be a very efficient method to drive the last employer out of the country. BTW most if not all of Europe has no license laws. Hardly anyone over there knows what a Eur.Ing is, nor do they care about that. Old rule: The more bureacratic hurdles, the less jobs there will be. Proven time and again. > This means like Doctors, architects civil engineers there is a minimum > standard for embedded Engineers. IT also means the salary will stabilise > at a reasonable rate and be less effected by sweat shops and unqualified > people. > > There are similar qualifications for technicians. This will help remove > the unqualified and raise the standard of the profession in general. The > problem is that there will be losers in the west as well. There are > probably as many unqualified hackers here as there. > So, a university degree is worthless and only some bureaucrats get to decide who will have a job and who doesn't? IMHO, if someone has a degree from a university that shall be enough of a qualification. What difference would some license make? Regards, Joerg http://www.analogconsultants.comArticle: 95084
On Fri, 20 Jan 2006 20:40:48 +0100, Blade <hun@hun.kom> wrote: >Strange. I always thought that Europe is declining because we are trying >to follow the foolish american social model. Europe is declining because Europeans aren't breeding. So far, we don't have that problem in the USA. JohnArticle: 95085
On 20 Jan 2006 11:19:19 -0800, fpga_toys@yahoo.com wrote: > >Antonio Pasini wrote: >> > http://www.newhomes.com/homedetail.jsp?regionid=1374&homeid=31352&siteid=1 >> > >> > Compare that to a $250,000 home in east Palo Alto or Oakland. >> >> Is that a joke ? I saw the home ad... I could never afford something >> remotely similar, here. > >It's not a joke, In the US all that is required is get off either >coast. The guy who started this thread I assume is in Huston, similar >"relatively low" prices there too. What I sometimes think is a joke are >the young engineers struggling with a family trying to pay for a >$500,000-600,000 home in Calif. Some I used to work with literally >bussed an hour and half each way morning and night to cut the home >costs. Another group bought a four place plane, and flew 45min, with >the office right next to the airport. Some of the most interesting >engineering businesses I've met in the US are in little farming towns >across the midwest ... 15-20 people making a killer wage competing with >low dollar bids against the big city coastal folks. > >I know of a two story 30,000 square foot doubly reinforced (for atomic >blasts) concrete building (with fall out shelter) and 250KW 480V/3PH >gensets, well, cistern, etc out in the middle of a no where that sold >for about $80,000 not long a go. I'm told that there are a hundred of >these across >the midwest -- former AT&T microwave relay facilities from the 50's. >The farms around them can frequently be had for nearly nothing to, a >half section or so ... build 40-200 large homes, and move your company. Do you know of any examples of high-tech electronics companies who have done this? I just bought a building in downtown San Francisco, a few blocks from City Hall, for about 75 times the square-foot cost you cite above. One reason is that this is where the talent likes to live. JohnArticle: 95086
<comp.arch.fpga.FAQ@gmail.com> wrote in message news:1137789842.944573.325940@g14g2000cwa.googlegroups.com... > Yes, I KNOW about that one. > Sorry, I just wondered why you didn't mention it! > > Do you really think our first time visitors visit that site before > doing their first post? > I curious as to how a FAQ++ solves this problem. > > Just cross-check the newsgroup and the FAQ and > you will notice that people does not seem to care much about that > site.Besides, it's on Fliptronics site. They can take it down when ever > they want. > Good point. I wouldn't trust them either. Probably run by some dodgy fly-by-night bloke. Good luck, Syms.Article: 95087
OK, I'm getting somewhere. It seems there's a REAL impossible timing error in there somewhere. Trouble is, when I run the timing analyser in the MAP stage, I see all the carry chain errors with longer delays first, even though they're not real errors. I now remember this is what happened last time. Next time I'll be able to find this post! Cheers, Syms. "Symon" <symon_brewer@hotmail.com> wrote in message news:43d141f8$0$15794$14726298@news.sunsite.dk... > Guys, > I'm using ISE 7.1.04i . In PAR I get this error:- > > ERROR:Par:228 - At least one timing constraint is impossible to meet > because component delays alone exceed the constraint. A physical timing > constraint summary follows. This summary will show a MINIMUM net delay for > the paths. The "Actual" delays listed in this summary are the UNROUTED > delays with a 100ps timing budget for each route, NOT the achieved timing. > However, it's only failing because the tool thinks there's 100ps delay > between each element in the carry chains. So, for a 32 bit carry chain the > damn thing's subtracting 3.2ns from my timing budget. ISTR having this > problem before and fixing it, can anyone remind me, Google couldn't. > > Similar stuff in another project is fine. > > TIA, Syms. > >Article: 95088
On Fri, 20 Jan 2006 13:13:20 -0800, John Larkin wrote: > I just bought a building in downtown San Francisco, a few blocks from > City Hall, for about 75 times the square-foot cost you cite above. One > reason is that this is where the talent likes to live. > > John On Larkin St.? Nicely done. BobArticle: 95089
Antti Lukats wrote: > "Neil Glenn Jacobson" <n.e.i.l.j.a.c.o.b.s.o.n@x.i.l.i.n.x.c.o.m> schrieb im > Newsbeitrag news:dqjseg$flv1@cliff.xsj.xilinx.com... >> Gentlemen, >> >> The issue that Antti is complaining about is indeed an issue but not one >> related to the ability of iMPACT to program CPLDs (which it can do just >> fine, thank you) but due to a bug (yes, a bug) that was revealed when the >> JEDEC file used was named "bypass.jed". It so happens that that name (for >> no good reason - that's why it's a bug) indicated that iMPACT should treat >> that device as if no JEDEC file was assigned and therefore only allowed >> the erase, readback and other functions associated with only BSDL files. >> We will fix that problem - but for now, avoid using JEDEC files named >> "bypass" > > > Hi Neil, > > I can not confirm that is was all about the 'bypass' - but my first attempt > to > workaround was unsuccesful as both the file name and folder name included > bypass so > > ../LEEB_bypass/top.jed > > is also causing problems - so just need to make sure that the file/path > doesnt contain ..bypass... > > It is consistent with the code in question that bypass anywhere in the full pathname or the file name would cause a problem. The code was fixed and will be released in service pack 3 of 8.1i Thanks for your help in identifying this issue, Antti.Article: 95090
<comp.arch.fpga.FAQ@gmail.com> wrote in message news:1137789842.944573.325940@g14g2000cwa.googlegroups.com... > Yes, I KNOW about that one. > > Do you really think our first time visitors visit that site before > doing their first post? Just cross-check the newsgroup and the FAQ and > you will notice that people does not seem to care much about that > site.Besides, it's on Fliptronics site. They can take it down when ever > they want. > > In any case, you guys could come with comments and suggestions. We > could even send them to http://www.fpga-faq.org, if you like that > better. > > > By the way, your post reminded me of another thing in this newsgroup I > find VERY annoying: people that write you a response that contains a > link with no explanation at all. And most of the responses are > completely off topic or at best they have misunderstood the question. > Is it too much to ask for a decent answer? Did my questions really > sound that stupid or do you think I don't know how to use google? > > (this was a general observation and not really about your post) Would you prefer "This is the site for an existing fpga faq: www.fpga-faq.org" ? If it's not obvious by context, don't bother with the link - the information's not very useful so don't use it. I also don't understand how a different FAQ would help out because there is no "must view this FAQ before posting" capability here. It's become obvious to me that things are much better here at comp.arch.fpga. I'v started looking in on sci.electronics.design and can't stand the unrelated chatter, insults, and mindnumbing topics that show up there. We've got it good here.Article: 95091
Joerg wrote:
>So, a university degree is worthless and only some bureaucrats get to
>decide who will have a job and who doesn't? IMHO, if someone has a
>degree from a university that shall be enough of a qualification. What
>difference would some license make?
I do not know if licensing/certification is
the answer, but I wish there was a way to weed
out the type of "professionals" that seem to
be appearing more and more often in the
newsgroups I frequent, with posts along the
lines of:
Hi group!! I'm a surgeon and will
be performing open chest surgery
on one of my patients tomorrow.
I have a few questions:
What is an hemorrhage, when do
you use it?
What is a suture?
What is coagulation,
What is an antibiotic?
What is anesthesia, do you implant
it before or after the coagulation?
Where exactly is the heart?
Can you help me? Please email
the answer directly to the
operating room.
Yes, I am exaggerating.
No, I am not exaggerating a lot.
Roberto Waltman
[ Please reply to the group, ]
[ return address is invalid. ]
Article: 95092Joerg wrote: > Hello Chris, > >> >>> I'm not suggesting this is a bad thing - after five years in the US I >>> am actively looking for opportunities elsewhere - I just thought it >>> was an interesting question. >> >> >> It is an interesting question. Part of the answer is to certify or >> license engineers the same as in other professions. IE like the PE in >> the US and other countries and the C.Eng in the UK and Eur. Ing in >> Europe. >> > > That would diminish the talent pool and be a very efficient method to > drive the last employer out of the country. BTW most if not all of > Europe has no license laws. Hardly anyone over there knows what a > Eur.Ing is, nor do they care about that. > > Old rule: The more bureacratic hurdles, the less jobs there will be. > Proven time and again. > > >> This means like Doctors, architects civil engineers there is a minimum >> standard for embedded Engineers. IT also means the salary will stabilise >> at a reasonable rate and be less effected by sweat shops and unqualified >> people. >> There are similar qualifications for technicians. This will help remove >> the unqualified and raise the standard of the profession in general. The >> problem is that there will be losers in the west as well. There are >> probably as many unqualified hackers here as there. > > > So, a university degree is worthless and only some bureaucrats get to > decide who will have a job and who doesn't? IMHO, if someone has a > degree from a university that shall be enough of a qualification. What > difference would some license make? So just what does "a degree from a university" really mean? Yesterday I heard a news report that questioned whether or not average US college graduates were even literate -- their test criterion was related to reading product labels/instructions [I was driving at time so I was paying attention to other things ;] I remember a sophomore EE lab requiring us to design a 1 transistor amp. MANY of my classmates were going to supply tech requesting better than 1% tolerance on bias resistors. Had reason to suspect they had similar problems later. I had an informative experience interviewing for a student position as electronics tech for university's chemistry department. The intended result of one of my (then future) boss's questions was either a half wave or full wave rectifier. I automatically went from fused connection to wall outlet to filtered DC out. He was surprised. I later was a tech for the "Power Supply Engineering" dept of a mini-computer manufacturer. A fresh EE grad was assigned to "design" a new AC power control panel (basically cord, fuses, relay, transformer, and distribution of fused AC to convince outlets). Said BSEE had not the foggiest of what to do. Decades later, between jobs, I applied for a temp position with a community college to pull computer cable for their *TEMPORARY* expansion into new facilities. It was admitted that I was more qualified than many of their permanent staff, but I didn't have letters after my name. As to PE license, it's irrelevant to reality if not legality. I don't know how it is now. But when I was a BSEE student in 60's, an EE interested in medical monitoring [which I was] was required to be competent to design bridges to receive a PE license. Did they know an aorta from a neuron was irrelevant. > > Regards, Joerg > > http://www.analogconsultants.comArticle: 95093
Neil Glenn Jacobson wrote: >> >> is also causing problems - so just need to make sure that the file/path >> doesnt contain ..bypass... >> >> > It is consistent with the code in question that bypass anywhere in the > full pathname or the file name would cause a problem. What were they thinking... ? > The code was fixed and will be released in service pack 3 of 8.1i That's Spac 3 ?! - did I miss Spac 1 and Spac 2 ? - and 8.1i is only days old.... -jgArticle: 95094
"Lanarcam" <lanarcam1@yahoo.fr> wrote in message news:1137776981.290724.299580@f14g2000cwb.googlegroups.com... > > Bryan Hackney wrote: > > SioL wrote: > > > "Lanarcam" <lanarcam1@yahoo.fr> wrote in message news:1137771805.545861.31220@g49g2000cwa.googlegroups.com... > > > > > >>Bryan Hackney wrote: > > >> > > >>>And, um, what has Africa ever contributed to the world? > > >> > > >>No idea? > > > > > > > > > Homo Sapiens? > > > > > > Supposedly the first man or woman came from there. > > > > > > > That's not certain, but we do know where Newton, Galileo > > and Chebyshev are from. > > And you know where the '0' comes from? > Imagine a memory filled with only '1' ;-) > >From India of course :-) same with the numbers we now use :-) SimonArticle: 95095
Jim Thompson wrote: > On Fri, 20 Jan 2006 15:26:43 +0000, Pooh Bear > <rabbitsfriendsandrelations@hotmail.com> wrote: > > > > > > >Bryan Hackney wrote: > > > >> bill.sloman@ieee.org wrote: > >> > Bryan Hackney wrote: > >> > > >> >>Europe is declining. > >> > > >> > Why do you think that? > >> ............................... > >> declining productivity (30 hour week) > > > >Where do you get the idea Europeans work a 30 hr week ? > > > >Another rabid right wing bags of lies publication ? > > > >Graham > > Sheeeesh! If you count the breaks it's even less than 30 hours. Not over here Jim. > When I was doing the big motor control project at Bosch in Bühlertal, > Germany, I'd barely get in the door and they'd break for "breakfast". Meal breaks aren't paid time IME. > I finally shamed them into working American hours by walking into the > lab and picking up a soldering iron and doing the tech work myself ;-) There's something to be said for that ! GrahamArticle: 95096
John Larkin wrote: > I'm working on a couple of projects with Brit and Irish companies, but > they seem to take years to get anything done. Would that be on account of (mis) 'management' influence by any chance ? GrahamArticle: 95097
"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message news:3p12t1tq1vqg98k7uf8o53e709irleahj6@4ax.com... > On 20 Jan 2006 05:44:00 -0800, "Noway2" <no_spam_me2@hotmail.com> > wrote: > > >> The current US administration seems to be > >> obsessed with investing in military adventures, while places like India have > >> decided to invest in educating their people - which investment do you think > >> will pay off better in 20 years? It's all a matter of priorities. > > > >It is no secrete that the US, both the mass populace and the government > >administrations put far too little emphasis on education and this is > >causing a declining society. > > How is US society declining? Incomes, health, longevity, education > levels have been increasing steadily for 200 years, even while we have > admitted tens of millions of immigrants. > > >There is no way that as a society that > >the people will be able to compete with anybody when they have the > >highest illiteracy rate of the industrialized world. > > Any country that admits as many immigrants as we do, will have a high > illiteracy rate. Besides, some countries just lie about it. Do you > really think Cuba's literacy rate is 99%? > > John > One of the problems is the level of literacy.. can you read a university level book or Doctor Sues.. both are levels of literacy (if at the extreme) SimonArticle: 95098
Jim Thompson wrote: > On 20 Jan 2006 08:46:19 -0800, amyler@eircom.net wrote: > > >Xenophobia eh, don't you just love it on a friday afternoon.... > > > >:-) > > You having some problem quoting pertinent text from the previous post? > > Makes you hard enough to follow to warrant plonk consideration. > > Plus you're a dumb shit. WHAT xenophobia? It's a socialism issue. > > ...Jim Thompson If you understood socialism you'd see that it isn't that either ! Laziness isn't determined by political affiliation. GrahamArticle: 95099
"Chris Hills" <chris@phaedsys.org> wrote in message news:v5jpNqAeeM0DFAhk@phaedsys.demon.co.uk... > In article <20Zzf.22772$SD1.13868@tornado.texas.rr.com>, HoustonEngineer > <xxx@yyy.com> writes > >Here is an observation - what do y'all think ? > > > >1 - Indian / Chinese / East European /etc people are at least as smart and > >hardworking as Westerner's / Japanese > > Interesting mix. > The groupings I would have thought should be > Indian/Chinese/Japanese > US/Europe (east and west) > > The innovations have come from all over. Just because there is a good > business climate for high tech in California does not mean the things > developed and produced there are necessarily invented there. > > >2 - However, they work for something like $10% of what we will (or could > >live on) > > Who is they? If you mean the Indians, Chinese and Taiwanese the answer > is : was yes, is yes and no in that order. Salaries in India are I > believe rising and they are being under cut by China. > > >3 - Our major advantage (in terms of these newsgroups) is our experience > >with these subjects/technologies/methods/products > > Who is "our" this is an international NG. The experience global. > Perhaps it is just that the Indian students are smarter and realise > there is much experience on this NG and hang out here. US student could > too. > > >4 - On these newsgroups, many of the questions originate from people in > >India, China or Eastern Europe and are answered by Westerners > > No. Many of the questions are answered by Eastern Europeans as well. I > know of several tools that are developed in Eastern Europe. They some > very good people. The Eastern Europeans have some of the best > mathematical and computing brains on the planet. > > >5 - Are we shooting ourselves in the foot ? > > who is "ourselves"? > > >I'm not suggesting this is a bad thing - after five years in the US I am > >actively looking for opportunities elsewhere - I just thought it was an > >interesting question. > > It is an interesting question. Part of the answer is to certify or > license engineers the same as in other professions. IE like the PE in > the US and other countries and the C.Eng in the UK and Eur. Ing in > Europe. > > This means like Doctors, architects civil engineers there is a minimum > standard for embedded Engineers. IT also means the salary will stabilise > at a reasonable rate and be less effected by sweat shops and unqualified > people. > > There are similar qualifications for technicians. This will help remove > the unqualified and raise the standard of the profession in general. The > problem is that there will be losers in the west as well. There are > probably as many unqualified hackers here as there. > > So who is unqualified? I have no degree or formal university training. I went to a polytech and studied electrical. Now I design radios and interface them to a digital world. Simon
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