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>Enterpoint Ltd. - Home of Raggedstone3. The Cyclone IV GX Development >Platform. Why I can't find this in Your page?Article: 150726
On 02/06/2011 05:25 PM, Muzaffer Kal wrote: >> I do thank you for your answer, but I thought I was clear that I'm looking for >> a finished product - NOT a chip. The unit I spotted was a PCB roughly the >> size of the Digilent board. It plugged directly into the female header on the >> FPGA board. >> >> I've spent yet another fun-filled 1/2 hour on Google trying to turn up the >> unit I remember seeing - no luck. It was not a Digilent product, that I do >> remember. I fear it may have been from a small firm that doesn't rise >> anywhere near the top of Google search or ones that perhaps has gone out of >> business... > > Try these: > http://www.sparkfun.com/products/8745 > http://www.mikroe.com/eng/products/view/182/5v-3-3v-voltage-translator-board/ Thanks! That mikroe product is a bit closer to the unit I recall. I've seen the little sparkfun boards before and if worse comes to worse, I'll put a bunch of them together to handle wider busses. SteveArticle: 150727
On Sun, 6 Feb 2011 10:33:06 -0800 (PST), Leon <leon355@btinternet.com> wrote: >On Jan 31, 5:08 pm, Axel Mammes <fpgause...@gmail.com> wrote: >> Hi everyone, >> >> I'm looking for someone that can develop an FPGA based multiUART with >> 32 UARTs for me. >> >> My software will run on this board: h**p://www.andahammer.com/mini35- >> sdk. >> >> The mini2440 ARM board has 40 pin system expansion bus connector that >> will connect to the multiuart PCB you develop. >> >> Each UART in the multiUART will connect to a gasoline dispenser using >> optoisolated 20mA, 30 mA, 45mA current loop. I will provide schematics >> for the TTL-current loop conversion. >> >> I was thinking the UARTs could be the 16750 from opencores.org. It's >> supposed to be stable and it works with standard Linux drivers. h**p:// >> opencores.org/project,uart16750 >> >> Check out the schematics of a mini2440 expansion card that Eric >> Brombaugh already developed. >> h**p://members.cox.net/ebrombaugh1/synth/mini_2440_fpga/index.html >> >> Regards >> Axel > >It might be easier and cheaper to use an XMOS device: > >http://www.xmos.com/ What baudrate do you need? The mention of optoisolated current loops suggests fairly low - 32 slow UARTS on something like a low-end ARM should be pretty doable.Article: 150728
"cfelton" <cfelton@n_o_s_p_a_m.n_o_s_p_a_m.ieee.org> writes: > Duration HDL Target Tech > ---------------------------------- > 9 Verilog FPGA > 6 Verilog FPGA > 6 Verilog ASIC > 2 Verilog/SV FPGA > 3 Verilog ASIC > 6 VHDL FPGA > 3 VHDL FPGA > 5 VHDL FPGA > 3 Verilog FPGA > 3 MyHDL FPGA > 3 Verilog FPGA > 3 Verilog ASIC Thanks for that list Chris - would you be able to comment any more on the MyHDL project? What's it (MyHDL) like as a design environment? Cheers, Martin -- martin.j.thompson@trw.com TRW Conekt - Consultancy in Engineering, Knowledge and Technology http://www.conekt.co.uk/capabilities/39-electronic-hardwareArticle: 150729
On Feb 6, 1:00 pm, John Adair <g...@enterpoint.co.uk> wrote: > Cyclone IV is expensive in Digikey at the moment. A lot does depend on > the numbers you are buying and if you need more than 1 or 2 it would > be worth talking to your local distributor. That is quite an understatement. If you can make them believe you are real, you can get a big discount over list prices. FPGA prices are very negotiable if you are buying any real quantity. But the biggest discounts come with the latest parts. If you are designing in an older part, you will only see modest discounts. With the newest parts they are trying hard to get design wins as they know early design wins make or break profits for years to come. So find out what each vendor is pushing hard and pit them against each other regardless of what brand you really want to use. It is amazing how hard they will try to win your design for just a couple 1000 parts per year. RickArticle: 150730
Steve We have a 20 pin DIL module (0.3 inch wide) that does a 5V to 3.3V level shift. Runs from 5V and basically an eight bit bus switch. I don't think it is on our website currently and it should be. I'm believe we do have stock of these but I will need to search our stock room to confirm that. If that is what you were thinking of contact our boardsales email and someone with do the hunting in the stock room. John Adair Enterpoint Ltd. On Feb 6, 8:23=A0pm, Steven Hirsch <snhir...@gmail.com> wrote: > This is driving me nuts... =A0Some months ago I tripped over a company wh= o made > a multi-line level shifter designed for the I/O DIP headers on the Digile= nt > Spartan 3 board. =A0Unfortunately, I lost the link and cannot seem to tur= n it up > in a Google search. =A0There's a lot of information on chips capable of d= oing > this, but I'm looking for a finished product to use in hobby pursuits. > > Is this ringing a bell with anyone on the news group? > > SteveArticle: 150731
It's only out to a very select number of strategic customers at present but that will change shortly. There is a minor revision of our original design in progress and once that is sorted out we will go public with the detail of the new revision board. This board, and a few of our other projects, have slipped as a result of our loading and we are a victim to our own success this year. Our website is also suffering a little due to the same cause. All of this should improve in early Q2 and I will be talking about a number of different and new concepts that we are currently developing and that I hope customers will like. As always we looking to apply common sense to practical problems and I'm hoping to have some of this to show at ESC in San Jose this year. John Adair Enterpoint Ltd. On Feb 6, 11:59=A0pm, "scrts" <mailsoc@[remove@here]gmail.com> wrote: > >Enterpoint Ltd. - Home of Raggedstone3. The Cyclone IV GX Development > >Platform. > > Why I can't find this in Your page?Article: 150732
We will be demonstrating a little of this in a new FPGA coprocessor module that we are doing for our standard development boards in a few weeks time. I'll talk about this one in our newsletter to those that get it in the next few weeks but until then you all just have to wonder. It will be a first come first served offer and when the stock is gone that will be it. John Adair Enterpoint Ltd. On Feb 7, 2:17=A0pm, rickman <gnu...@gmail.com> wrote: > On Feb 6, 1:00 pm, John Adair <g...@enterpoint.co.uk> wrote: > > > Cyclone IV is expensive in Digikey at the moment. A lot does depend on > > the numbers you are buying and if you need more than 1 or 2 it would > > be worth talking to your local distributor. > > That is quite an understatement. =A0If you can make them believe you are > real, you can get a big discount over list prices. =A0FPGA prices are > very negotiable if you are buying any real quantity. =A0But the biggest > discounts come with the latest parts. =A0If you are designing in an > older part, you will only see modest discounts. =A0With the newest parts > they are trying hard to get design wins as they know early design wins > make or break profits for years to come. =A0So find out what each vendor > is pushing hard and pit them against each other regardless of what > brand you really want to use. =A0It is amazing how hard they will try to > win your design for just a couple 1000 parts per year. > > RickArticle: 150733
On 02/07/2011 09:46 AM, John Adair wrote: > Steve > > We have a 20 pin DIL module (0.3 inch wide) that does a 5V to 3.3V > level shift. Runs from 5V and basically an eight bit bus switch. I > don't think it is on our website currently and it should be. I'm > believe we do have stock of these but I will need to search our stock > room to confirm that. If that is what you were thinking of contact our > boardsales email and someone with do the hunting in the stock room. And that's a finished product that's ready to plug in? I don't know where I'm failing to communicate clearly, but I'm not looking for a fabrication adventure. If I'm not able to turn up the product I remember (really p**ses me off that I lost the link) I'll string together a bunch of the little level shifters from SparkFun. Would have been great to have the one that was made to plug into the Spartan 3. SteveArticle: 150734
Steve The one I mentioned is just a bus switch module.If you want something with a Spartan-3 and 5V tolerant I/O have a look at our Craignell1 family http://www.enterpoint.co.uk/component_replacements/craignell.html, Craignell2 http://www.enterpoint.co.uk/component_replacements/craignell2.ht= ml, or Drigmorn2 http://www.enterpoint.co.uk/drigmorn/drigmorn2.html. We have 40 5V tolerant I/O on the Spartan-6 based Drigmorn3 http://www.enterpoint.co.uk/drigmorn/drigmorn3.html and Drigmorn4 http://www.enterpoint.co.uk/drigmorn/drigmorn4.html. All of the above are designed to interface 5V logic over the relevant interfaces. The Craignell parts also have pullup resistor to ensure 5V CMOS compatibility. There optional pullup resistor sites on the Drigmorn2-4 familiesfor the same purpose. John Adair Enterpoint Ltd. On Feb 7, 10:18=A0pm, Steven Hirsch <snhir...@gmail.com> wrote: > On 02/07/2011 09:46 AM, John Adair wrote: > > > Steve > > > We have a 20 pin DIL module (0.3 inch wide) that does a 5V to 3.3V > > level shift. Runs from 5V and basically an eight bit bus switch. I > > don't think it is on our website currently and it should be. I'm > > believe we do have stock of these but I will need to search our stock > > room to confirm that. If that is what you were thinking of contact our > > boardsales email and someone with do the hunting in the stock room. > > And that's a finished product that's ready to plug in? =A0I don't know wh= ere I'm > failing to communicate clearly, but I'm not looking for a fabrication adv= enture. > > If I'm not able to turn up the product I remember (really p**ses me off t= hat I > lost the link) I'll string together a bunch of the little level shifters = from > SparkFun. =A0Would have been great to have the one that was made to plug = into > the Spartan 3. > > SteveArticle: 150735
On 02/07/2011 06:08 PM, John Adair wrote: > Steve > > The one I mentioned is just a bus switch module.If you want something > with a Spartan-3 and 5V tolerant I/O have a look at our Craignell1 > family http://www.enterpoint.co.uk/component_replacements/craignell.html, > Craignell2 http://www.enterpoint.co.uk/component_replacements/craignell2.html, > or Drigmorn2 http://www.enterpoint.co.uk/drigmorn/drigmorn2.html. > > We have 40 5V tolerant I/O on the Spartan-6 based Drigmorn3 > http://www.enterpoint.co.uk/drigmorn/drigmorn3.html and Drigmorn4 > http://www.enterpoint.co.uk/drigmorn/drigmorn4.html. > > All of the above are designed to interface 5V logic over the relevant > interfaces. The Craignell parts also have pullup resistor to ensure 5V > CMOS compatibility. There optional pullup resistor sites on the > Drigmorn2-4 familiesfor the same purpose. Thanks, John. Your stuff looks lovely, but too rich for my poor hobbyist's blood. I own a Spartan 3 board already and was simply looking to interface that with a single expansion board of some sort. I _know_ someone out there offers a multi-line, bidirectional converter that's designed to plug directly to the Spartan board. I've seen the bloody thing on the web with my own eyes, yet cannot turn it up.Article: 150736
"Steven Hirsch" <snhirsch@gmail.com> wrote in message news:1_qdnQHB6ZqYHs3QnZ2dnUVZ_u-dnZ2d@giganews.com... > On 02/07/2011 06:08 PM, John Adair wrote: >> Steve >> >> The one I mentioned is just a bus switch module.If you want something >> with a Spartan-3 and 5V tolerant I/O have a look at our Craignell1 >> family http://www.enterpoint.co.uk/component_replacements/craignell.html, >> Craignell2 http://www.enterpoint.co.uk/component_replacements/craignell2.html, >> or Drigmorn2 http://www.enterpoint.co.uk/drigmorn/drigmorn2.html. >> >> We have 40 5V tolerant I/O on the Spartan-6 based Drigmorn3 >> http://www.enterpoint.co.uk/drigmorn/drigmorn3.html and Drigmorn4 >> http://www.enterpoint.co.uk/drigmorn/drigmorn4.html. >> >> All of the above are designed to interface 5V logic over the relevant >> interfaces. The Craignell parts also have pullup resistor to ensure 5V >> CMOS compatibility. There optional pullup resistor sites on the >> Drigmorn2-4 familiesfor the same purpose. > > Thanks, John. Your stuff looks lovely, but too rich for my poor hobbyist's > blood. I own a Spartan 3 board already and was simply looking to interface > that with a single expansion board of some sort. I _know_ someone out there > offers a multi-line, bidirectional converter that's designed to plug directly > to the Spartan board. I've seen the bloody thing on the web with my own eyes, > yet cannot turn it up. Steven, already offered previously is this, with the reverse direction in the panel to the left of the page. http://www.mikroe.com/eng/products/view/182/5v-3-3v-voltage-translator-board/ They are $19.90 each, but, IMHO, they will do exactly what you want, and can be used in other circuits that you may decide to need them in. 8^) BillArticle: 150737
<snip> > >Thanks for that list Chris - would you be able to comment any more on >the MyHDL project? What's it (MyHDL) like as a design environment? > >Cheers, >Martin > > MyHDL is a Python module/library for Python. It adds RTL to the Python language. You can simulate your RTL design in Python, then convert to Verilog/VHDL for synthesis. You can co-simulate MyHDL (python) with the Verilog/VHDL. You would use the same tools (editors, debugger, etc) that you use with any Python development. I find MyHDL very useful in developing IP. You might have many flavors of a particular IP, Python can be useful for managing it all. Things like managing larger number of registers, in Python you can easily dump all the registers to CVS, HTML, etc. Without having to have an external tool to parse etc. For information see the Why MyHDL http://www.myhdl.org/doku.php/why. Hope that helps, chris --------------------------------------- Posted through http://www.FPGARelated.comArticle: 150738
Looking for a Level shifter to support the following: 1. One side voltage is 3.3. (since I am interfacing with FPGA I am ok if its 2.5V or 1.8V as well) 2.Other side needs to support both 3.3V/2.9/2.8V and 1.8V 3.200MhZ speed support is required on the IOs. Any help will be great. Thanks --------------------------------------- Posted through http://www.FPGARelated.comArticle: 150739
Hello,
I wanted to know the power specification of Spartan-3A
(XC3SD1800A).In the data sheet it does not speak precisely of the power
consumption. How much is the power rating of the board? Also what,s the
maximum current the board needs or withstand -- is less than 4A sufficient
to drive the board safely? Please throw some light on the above queries.
Cheers;
Chethan
---------------------------------------
Posted through http://www.FPGARelated.com
Article: 150740I've been doing digital design for awhile now both in class and in my co-op terms. I work with FPGAs pretty regularly. However, I have some side projects in my head that I want to work on, so I'd like a board for my personal use. Projects that may require a bit more kick. DSP, embedded processor design, maybe even ANN, etc. I don't really want to spend any more than, say, $500. So I've been looking at the following dev kits: DE2-115 (Cyclone IV) http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=139&No=502 and Atlys (Spartan 6) http://digilentinc.com/Products/Detail.cfm?NavPath=2,400,836&Prod=ATLYS I admit I haven't used the Altera tool set, but at the end of the day its the hardware and synthesis quality that matters. I'm also open to other suggestions, of course. Anyone have experience with these low-cost development kits and chips? Any and all help is greatly appreciated! :) --------------------------------------- Posted through http://www.FPGARelated.comArticle: 150741
On 02/07/2011 08:41 PM, Bill Garber wrote: >> Thanks, John. Your stuff looks lovely, but too rich for my poor hobbyist's >> blood. I own a Spartan 3 board already and was simply looking to interface >> that with a single expansion board of some sort. I _know_ someone out there >> offers a multi-line, bidirectional converter that's designed to plug >> directly to the Spartan board. I've seen the bloody thing on the web with my >> own eyes, yet cannot turn it up. > > Steven, already offered previously is this, with the reverse direction in the > panel to the left of the page. > http://www.mikroe.com/eng/products/view/182/5v-3-3v-voltage-translator-board/ > They are $19.90 each, but, IMHO, they will do exactly what you want, and can > be used in other circuits that you may decide to need them in. 8^) <sigh..> Yes, $19.95 with a modest $25 shipping charge, though hopefully that charge would cover multiple units in a single shipment. I have some thinking to do.Article: 150742
On 02/07/2011 08:41 PM, Bill Garber wrote: > Steven, already offered previously is this, with the reverse direction in the > panel to the left of the page. > http://www.mikroe.com/eng/products/view/182/5v-3-3v-voltage-translator-board/ At the risk of appearing naive, what is the difference between those two boards? Both have high and low voltage ports and both can be switched in direction. Isn't the overall functionality thus identical?Article: 150743
"cfelton" <cfelton@n_o_s_p_a_m.n_o_s_p_a_m.ieee.org> writes: > <snip> >> >>Thanks for that list Chris - would you be able to comment any more on >>the MyHDL project? What's it (MyHDL) like as a design environment? >> >>Cheers, >>Martin >> >> > > Hope that helps, Thanks Chris - I should've been clearer in my question, sorry! I have some familiarity with MyHDL, and a lot with Python. FWIW, last time I tried it (for fun, not work - and probably version 0.5), it seemed to me that MyHDL was pretty low-level (on a par with Verilog) at the "synthesisable" end - bags of bits, arithmetic, but not attempting to turn complex data structures into HDL. But you *do* have the benefit of a hugely powerful language at the testbench end. Reading your other post (which I'd missed when I asked the question), it sounds like MyHDL is your preferred design environment - is it the value of Python in the testing phase you see as being paramount? Are there also compelling "RTL-level" benefits also (compared to VHDL)? Thanks, Martin -- martin.j.thompson@trw.com TRW Conekt - Consultancy in Engineering, Knowledge and Technology http://www.conekt.co.uk/capabilities/39-electronic-hardwareArticle: 150744
"Steven Hirsch" <snhirsch@gmail.com> wrote in message news:BrKdnZLU0fEjpczQnZ2dnUVZ_gednZ2d@giganews.com... > On 02/07/2011 08:41 PM, Bill Garber wrote: > >> Steven, already offered previously is this, with the >> reverse direction in the panel to the left of the page. >> http://www.mikroe.com/eng/products/view/182/5v-3-3v-voltage-translator-board/ > > At the risk of appearing naive, what is the difference between those > two boards? Both have high and low voltage ports and both can be > switched in direction. Isn't the overall functionality thus identical? Ok, I will do ALL of the work for you, if I have to. 8^) I am just kidding, of course, you know me Steven. :o) Yes, the manuals both say, at the bottom of page 2, that both boards can be set up to operate in both directions. As I said, I looked them over and I feel that this fills your needs most admirably. Shop around, Sir, you can get them cheaper. :o) BillArticle: 150745
"chethansharma" <chethan.sharma.p@n_o_s_p_a_m.gmail.com> wrote in message news:EO2dnT4WTpEUuMzQnZ2dnUVZ_gednZ2d@giganews.com... > Hello, > I wanted to know the power specification of Spartan-3A > (XC3SD1800A).In the data sheet it does not speak precisely of > the power consumption. How much is the power rating of the board? > Also what's the maximum current the board needs or withstand -- > is less than 4A sufficient to drive the board safely? Please throw > some light on the above queries. > > Cheers; > Chethan I apologize for replying without an answer, but, don't you have a manual or datasheet for this board. Hard to believe if you don't. I suggest that you RTFM or RTFD before you come here asking some questions where the answers should already be supplied by the MFG. BillArticle: 150746
On Feb 8, 6:03=A0am, "kolar" <kamleshrr@n_o_s_p_a_m.n_o_s_p_a_m.gmail.com> wrote: > Looking for a Level shifter to support the following: > 1. One side voltage is 3.3. (since I am interfacing with FPGA I am ok if > its 2.5V or 1.8V as well) > 2.Other side needs to support both 3.3V/2.9/2.8V and 1.8V > 3.200MhZ speed support is required on the IOs. I'm not sure I understand the requirement. When you say that side B has to support multiple levels, do you mean depending on what it is connected to or different inputs need to be individually configured? If the latter, the solution is simple, use a bank of 1 bit translators. If the former then you will need to have some way of setting the level as required. If you use quick switches maybe you can power them from 2.5 volts, set the FPGA to 2.5 volts and the resulting voltage levels will work with the standards you are listing. 3.2 MHz is no problem with quick switches at all. If you are using the convention of using a period instead of a comma to separate thousands from hundreds and mean 3.2 GHz, you may be barking up the wrong tree in general. At 3.2 GHz the entire interface needs to be specially designed including the traces on the PCB. RickArticle: 150747
On 02/08/2011 09:23 AM, Bill Garber wrote: > > "Steven Hirsch" <snhirsch@gmail.com> wrote in message > news:BrKdnZLU0fEjpczQnZ2dnUVZ_gednZ2d@giganews.com... >> On 02/07/2011 08:41 PM, Bill Garber wrote: >> >>> Steven, already offered previously is this, with the reverse direction in >>> the panel to the left of the page. >>> http://www.mikroe.com/eng/products/view/182/5v-3-3v-voltage-translator-board/ >> >> At the risk of appearing naive, what is the difference between those two >> boards? Both have high and low voltage ports and both can be switched in >> direction. Isn't the overall functionality thus identical? > > Ok, I will do ALL of the work for you, if I have to. 8^) > I am just kidding, of course, you know me Steven. :o) Heh - I can take ribbing when it's due me.. > Yes, the manuals both say, at the bottom of page 2, that both boards can be > set up to operate in both directions. > As I said, I looked them over and I feel that this fills your needs most > admirably. Yes, but since they went to so much trouble to design two different products, I cannot help but be curious as to why two distinct designs were necessary. There must be something I'm overlooking... Inquiring minds want to know. Shop around, Sir, you can get them cheaper. :o) I will do so - hopefully they have an importer. SteveArticle: 150748
<snip> > >I have some familiarity with MyHDL, and a lot with Python. > >FWIW, last time I tried it (for fun, not work - and probably version >0.5), it seemed to me that MyHDL was pretty low-level (on a par with >Verilog) at the "synthesisable" end - bags of bits, arithmetic, but >not attempting to turn complex data structures into HDL. But you *do* >have the benefit of a hugely powerful language at the testbench end. > >Reading your other post (which I'd missed when I asked the question), >it sounds like MyHDL is your preferred design environment - is it the >value of Python in the testing phase you see as being paramount? Are >there also compelling "RTL-level" benefits also (compared to VHDL)? > Yes, mainly having Python as an environment and the power it provides for testbenching. As you eluded, MyHDL is an RTL. It is not a higher-level abstraction, it is at the same level as Verilog/VHDL (no intention of being a higher abstraction level). I believe it adds a lot of power (features that are being added in SystemVerilog and VHDL 2008). I also believe that MyHDL, in many cases, combines the best of both words, Verilog and VHDL. In my case, I can directly generate a complex stimulus, send it to my UUT, collect the results, analyze all in the same environment (script). Previously, I would generate this in Matlab, export to a file or try and use the clumsy (and expensive) HDL/sim interfaces, write to a file, import back ... Now I can let my designs simulate and I have all my signal processing analysis waiting for me at the end. Or I can interactively (in a shell) run the simulation. If I have an FFT core, I can call (run x cycles) and get the output, plot the output, etc Hope that helps, Chris --------------------------------------- Posted through http://www.FPGARelated.comArticle: 150749
<snip> > >Yes, mainly having Python as an environment and the power it provides for >testbenching. As you eluded, MyHDL is an RTL. It is not a higher-level >abstraction, it is at the same level as Verilog/VHDL (no intention of being >a higher abstraction level). > Alluded to not "eluded", sorry chris --------------------------------------- Posted through http://www.FPGARelated.com
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