LeafLabs Garden » User Favorites: josheeg

LeafLabs Garden » User Favorites: josheeg 85 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:03:33 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php gbulmer on "Oak FPGA Toolchain" http://forums.leaflabs.com/topic.php?id=62&page=5#post-105766 Thu, 06 Aug 2015 04:58:12 +0000 gbulmer 105766@http://forums.leaflabs.com/ @mian2zi3 - Sorry for the slow response, and big thanks to you and Clifford Wolf for the wonderful work, and you for the Update. I had pretty much assumed there wouldn't be an Open Source FPGA toolchain in the near future, so this is a very pleasant surprise. Even better, the <a href="http://www.latticesemi.com/icestick">iCEstick Evaluation Kit</a> FPGA development hardware is quite reasonably priced, with <a href="http://www.latticestore.com/searchresults/tabid/463/searchid/1/searchvalue/ice40hx1k-stick-evn/default.aspx">Lattice selling it at $21.86</a> For anyone interested, I did a quick check, and it is available in the UK at: <a href="http://uk.mouser.com/ProductDetail/Lattice/ICE40HX1K-STICK-EVN/?qs=%2fha2pyFadugY4woXwsBFcG4ricvRE8gsBJ8rWqbssc4%3d">Mouser UK for £14.54+VAT</a> <a href="http://uk.farnell.com/lattice-semiconductor/ice40hx1k-stick-evn/ice40-hx1k-icestick-eval-kit/dp/2355207?ost=iCEstick">Farnell UK for £19.22+VAT</a> Thank you very much for the Update. (Full disclosure: I am not a member of LeafLabs staff.) mian2zi3 on "Oak FPGA Toolchain" http://forums.leaflabs.com/topic.php?id=62&page=5#post-105764 Sun, 26 Jul 2015 22:57:58 +0000 mian2zi3 105764@http://forums.leaflabs.com/ This isn't directly relevant to Oak, but my be interesting in the larger context of the conversation. There is now a complete, open source, Verilog-to-bitstream toochain for one family of FPGAs, the Lattice iCE40. Reverse engineering and tools to generate bistreams was done by the IceStorm project. Yosys is an open source Verilog synthesis tool. (Both done by Clifford Wolf.) I wrote a place and route tool (simulated annealing placement with multi-pass congestion aware routing) targeting IceStorm and the iCE40. Here are some links: <a href="http://www.clifford.at/icestorm/" rel="nofollow">http://www.clifford.at/icestorm/</a> <a href="https://github.com/cseed/arachne-pnr" rel="nofollow">https://github.com/cseed/arachne-pnr</a> <a href="http://www.clifford.at/yosys/" rel="nofollow">http://www.clifford.at/yosys/</a> DenisErharts on "Low Frequency Noise USB Power source:" http://forums.leaflabs.com/topic.php?id=695#post-105457 Mon, 30 Jun 2014 06:20:58 +0000 DenisErharts 105457@http://forums.leaflabs.com/ This could be neat for a maple or lillypad arduino or for sensors. The systems here work good for 3v charging 5v would be awsome for a USB jack that charges itself and will discharge in your mp3 player when it is low. I have seen buck boost chips and energy harvesters... Now a TI Low Frequency Transever that can charge lipol batteries looks very interesting. I am allready building parts of it in kicad. Most of the examples show 3.3v what should be done to allow for 5v battery output for a 5v system 3.3v is most of my equipment but if it was to charge things that had a usb connector like cellphones mp3 players etc. how should that be done any sugjestions? TMS37157 LTC3108 linear design note 483 LTC3109 LTC3588-1 LTC4070 So what chip combination would work best what about allowing for a solar panel and pizio wind vibrated generator to be plugged in and charge a lipol so 5v could come out when someone plugs in their usb device? So which chip combination you have tried.. I am working on similar sort of USB power source and need a perfect chip system..Hope you will be able to help me out.. codelectron on "Oak FPGA Toolchain" http://forums.leaflabs.com/topic.php?id=62&page=5#post-105276 Tue, 11 Mar 2014 15:27:41 +0000 codelectron 105276@http://forums.leaflabs.com/ Hi Guys, This post is about open source fpga toolchain. I have been searching about this topic for many months or years and I found a solution which should work although I havent tested it myself. I have written about it in my blog <a href="http://www.codelectron.blogspot.de/2014/03/open-source-fpga-tool-chain.html" rel="nofollow">http://www.codelectron.blogspot.de/2014/03/open-source-fpga-tool-chain.html</a> .I know that the last post was two years back but I wanted to continue that from here rather than creating a new topic. May be this is useful for Oak or may be its not. let me know about your opinions on my findings. Krishna <a href="http://www.codelectron.com" rel="nofollow">http://www.codelectron.com</a> iainism on "eigan matrix math has header files for c++ intigration and duo examples i would" http://forums.leaflabs.com/topic.php?id=10261#post-22682 Wed, 27 Feb 2013 09:37:53 +0000 iainism 22682@http://forums.leaflabs.com/ I should add that I'm not sure that Octave would be able to be ported to the Maple without a lot of work (or even at all)! iainism on "eigan matrix math has header files for c++ intigration and duo examples i would" http://forums.leaflabs.com/topic.php?id=10261#post-22678 Wed, 27 Feb 2013 07:59:31 +0000 iainism 22678@http://forums.leaflabs.com/ Do you mean this project? <a href="http://eigen.tuxfamily.org/index.php?title=Main_Page" rel="nofollow">http://eigen.tuxfamily.org/index.php?title=Main_Page</a> If you know that you will only use small matrices (4x4 or less) then you may also want to consider: <a href="http://www.trenki.net/content/view/16/36/" rel="nofollow">http://www.trenki.net/content/view/16/36/</a> However, if you want to really go for it then GNU Octave provides an API: <a href="http://octave.sourceforge.net/doxygen/html/" rel="nofollow">http://octave.sourceforge.net/doxygen/html/</a> This would also allow you access to other Octave functions which may (or may not) be useful for you, but also may be providing a 747 when really you just need a bicycle (<a href="http://aboutawebmaster.com/articles/build-a-cms-1.php)" rel="nofollow">http://aboutawebmaster.com/articles/build-a-cms-1.php)</a>! josheeg on "eigan matrix math has header files for c++ intigration and duo examples i would" http://forums.leaflabs.com/topic.php?id=10261#post-22444 Sun, 24 Feb 2013 10:11:26 +0000 josheeg 22444@http://forums.leaflabs.com/ eigan matrix math has header files for c++ intigration and duo examples i would like to try it on the maple. the mini is nice and minimalistic for breadboards. So it should be good for getting large math projects started in maple mini matrix inverse multiplication addition multiplication. Then maby linear discriminent analisis pattern matching. josheeg on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20316 Tue, 16 Oct 2012 20:03:25 +0000 josheeg 20316@http://forums.leaflabs.com/ It worked I did that. example. void setup() { } void loop() { SerialUSB.println("Hello World!"); ufsum=12.04l; SerialUSB.println(ufsum,5); } gbulmer on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20285 Sat, 13 Oct 2012 13:13:43 +0000 gbulmer 20285@http://forums.leaflabs.com/ josheeg - have you looked in your distribution to find the file "Print.cpp"? Does that contain this code: <pre><code>void Print::print(double n, int digits) { printFloat(n, digits); }</code></pre> If it does, then HardwareSerial has a version of <code>print</code> which takes two parameters. The first parameter is the double to be printed. The second parameter is the number of digits after the decimal point, so set this value to be the number of decimal places you want to print. josheeg on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20282 Fri, 12 Oct 2012 22:33:20 +0000 josheeg 20282@http://forums.leaflabs.com/ A second parameter? I looked where double was defined and still do not know what to modify to make it print further than 2 digits past the decimal. gbulmer on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20264 Thu, 11 Oct 2012 12:05:04 +0000 gbulmer 20264@http://forums.leaflabs.com/ josheeg - have a look in the file "Print.cpp". In my distribution, the function to print a double has the prototype: <code>void Print::print(double n, int digits)</code> so if you have that version in your installation, try supplying a second parameter to set the number of digits. josheeg on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20263 Thu, 11 Oct 2012 11:11:06 +0000 josheeg 20263@http://forums.leaflabs.com/ The version of my maple ide is around "maple-ide-0.0.9-linux64.tgz" because I installed 64 bit ubuntu on my laptop and all sort of errors happen trying to get a new one and windows 7 on the other boot. josheeg on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20262 Thu, 11 Oct 2012 11:07:23 +0000 josheeg 20262@http://forums.leaflabs.com/ I learned some linear algebra from the manga guide to linear algebra and used the excel spread sheet tutorial sample data to guide me through it. So I was able to do that example on paper with a simple hand calculator the ones without all the functions. I have had the maple print to the terminal in linux Hello World. Now I am trying to print a floating point doulble. The number is 33.33333. I get back 33.33 or 33.34 or something like that. I looked in the documentation here: <a href="http://leaflabs.com/docs/lang/api/serialusb.html#lang-serialusb" rel="nofollow">http://leaflabs.com/docs/lang/api/serialusb.html#lang-serialusb</a> It said this "USBSerial::print(double n) Print n, accurate to 2 digits after the decimal point. " how do I get it to print more after the decimal point? josheeg on "Help me use SVM Light to recognize patterns it is in c" http://forums.leaflabs.com/topic.php?id=1979#post-20261 Thu, 11 Oct 2012 11:01:07 +0000 josheeg 20261@http://forums.leaflabs.com/ I have worked through a spread sheet example with a hand calculator the simple ones with just add subtract multiply and divide and maby it will work I guess I wondered if someone else already looked at the problem in the past and did it. Sometimes resources or knowing terms that I might not could have shown a result I apologize for inconveniencing people. gbulmer on "I create a double n=3.33333 how do I have that printed out on the serial port?" http://forums.leaflabs.com/topic.php?id=9164#post-20244 Tue, 09 Oct 2012 20:59:40 +0000 gbulmer 20244@http://forums.leaflabs.com/ @josheeg - Have you taken mbolivar's advice? <a href="http://forums.leaflabs.com/topic.php?id=1979#post-11457" rel="nofollow">http://forums.leaflabs.com/topic.php?id=1979#post-11457</a>