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• Ubuntu: What gcc to use when crosscompiling for the STM32 (Cortex-M3)?

  - by Johan

  Hi I'm trying to get started with the STM32 (Cortex-M3) and my plan is get this working from Ubuntu (9.04 / AMD64). To start with I got the Olimex stm32-h103 header board and the Olimex ARM-USB-OCD jtag, and on to of that I will probably use OpenOCD, gcc and Eclipse. But right now I'm looking into what version of gcc to use and how to setup that to be able to crosscompile the code. There seem to be some arm projects out there but I don't know what to start with, can somebody push me in the right direction? Thanks Johan Update: There seems almost to be what I want from codesourcery, but they seem to focus on IA32 and not AMD64. However in the supported devices I find the Cortex-M3 ARM EABI, ARM M-profile Simulator -mcpu=cortex-m3 -mthumb Update: There is a possibility to install IA32 on AMD64, so maybe the marked answer is obsolete already. Update: Found this link about crosscompile for the Cortex-M3. http://www.eluaproject.net/en_tc_cortex.html http://fanplastic.org/gcc-for-arm-eabi/

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• How do continuously update data to an asp page?

  - by Lori

  Hi, I have an asp page based on a very simple database. It references a single table of probably 30 records and maybe 12 data fields and everything works great as I am only uploading a new database every week or so. I have a special circumstance where I would like upload new data to the database and display automatically on the page every 20 to 30 seconds without the user having to refresh their screen. I would expect up to 1000 concurrent users accessing the data. I have been manually uploading the database via ftp, which will obviously not work on this timeline and would also run the risk of error pages as the database is being replaced. So, can anyone point me the right direction to setup this scenario? Other details that might be helpful: The database is an Access database (but I could change to another format if needed) Running on Windows platform hosted by an ISP, not my own server Thanks in advance for any help on this! Lori

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• Refernce platform specific System.Data.SQLite

  - by Dmitriy Nagirnyak

  Hi, I am using SQLite for the unit testing and might use it as a database for local development/staging. The System.Data.SQLite has basically 2 versions: x86 and x64. Correct one should be used for the specific platform. I have 64 bit Win7, other guys in the team might use 32-bit OSs. The server's platform is not known at this stage. If I use 32-bit version of the assembly on 64-bit platform I get BadImageFormatException: Could not load file or assembly 'System.Data.SQLite'. I believe similar will happen trying to use 64-bit assembly on 32-bit platform. So my question is what is the best way to reference the SQLite assembly so that it does not depend on the platform and people can just use it? It is ok to use 32-bit version of assembly on a 64-bit platform (Maybe there is a switch for that somewhere?). Thanks, Dmitriy.

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• Any good card game AI strategies?

  - by Mark

  What would be strategies for writing a good computer opponent for a card game? Most card games are games of incomplete information, so simply mapping out and traversing the game tree as one could do with a board game does not seem too promising. Maybe one could track what open cards are in the game (as soon as they are revealed) and assign probabilities to certain events (e.g. opponent still has 2 cards of clubs). Does anyone have experience with this? Links and directions greatly appreciated. Thanks! -Mark

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• Quaddratic Bezier Curve: Calculate Tangent

  - by stefan.at.wpf

  Hello, I have have a quadratic bezier curve and I want to calculate the slope of the tangent in a given point. For example, let it be the middlepoint of the quadratic bezier curve, therefore t=0.5 (please see the link below for a picture of this). I've calculated the first derivation of the formula for the quadratic bezier curve, however I get 400 as value for the slope, though it should be 0. Maybe I'm using the first derivation in a wrong way? I know I could also calculate the tangents using trigonometric functions, however I'd like to do it using the first derivation, shouldn't this be possible? Thanks for any hint! For clarification / please note: I'm interested in a general way to get the slope in a arbitrary given point on a quadratic bezier curve, not only to get the tangent in the start- and end point. A picture of my problem including the text above: http://cid-0432ee4cfe9c26a0.skydrive.live.com/self.aspx/%c3%96ffentlich/Quadratic%20Bezier%20Curve.pdf Thank you very much for any hint!

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• ASP.NET remote debugging using Visual Studio 2008

  - by schmoopy

  Im having issues getting this to work, maybe its not even possible? I have a PUBLIC Server http://publicserver.com I want to debug using my laptop from my home (for instance) I run msvsmon.exe on the public server, it starts up fine. On my local machine, i have my code open and in VS, i choose Debug-Attach for Qualifier i enter publicserver.com, but it tells me it cannot find it Questions: 1.) What port does remote debugging use? If i port sniff i dont see msvsmon.exe opening any new port ... Does it use 4015 by default? I dont think its a security thing, so please dont point me to the articles, i have followed them as much as i can, but they dont work for my scenerio (unless you find one i havent seen) Thanks :-)

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• MYSQL: Like Method, Similar Words - But Don't Show the Searched Word

  - by elmaso

  Hello, actually i use this method to show similar words for a search request.. $query = "SELECT * FROM searches WHERE Query LIKE '%$search%' ORDER BY Query"; if someone searches for "nelly" it looks up in the database for similar words "nelly furtado, nelly ft. kelly"... but i dont want to show up the searched word.. example: you've searched for nelly - try this too: nelly, nelly furtado, nelly ft., the bold word should not showed up again, because it's the searched word.. is there maybe a method with MATCH AGAINST? thank you!

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• Mapping table and a simple view with Fluent NHibernate

  - by adrin

  I have mapped a simple entity, let's say an invoice using Fluent NHibernate, everything works fine... after a while it turns out that very frequently i need to process 'sent invoices' (by sent invoices we mean all entities that fulfill invoice.sent==true condition)... is there a way to easily abstract 'sent invoices' in terms of my data access layer? I dont like the idea of having aforementioned condition repeated in half of my repository methods. I thought that using a simple filtering view would be optimal, but how could it be done? Maybe I am doing it terribly wrong and someone would help me realize it :)?

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• [WPF] Format datagrid row foreground depends on data

  - by ktutnik

  Hi everyone, Im new in wpf, i though it was an easy task. i searched in the internet but not lucky to found any help regarding this problem. <Style TargetType="{x:Type DataGridRow}"> <Setter Property="Foreground" Value="{Binding Converter=conditionToColorConverter}"/> </Style> the problem is how to pass the row data to the value.. the converter will return RED or BLACK color when specified properties of the row data match some category. or maybe there is an easy way to do that? Thanks in advance Kin

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• TIdTCPClient to SSL

  - by waza123

  When I connect to 80 port, plain text web site using TIdTCPClient component, all works fine, data is received without a problem, but, when I connect to 443 port, SSL web site, data not always came. Maybe something with my receive data block ? Need advice. while not Terminated do begin SetLength(data, 0); ws.IOHandler.ReadBytes(data, -1); if Length(data) = 0 then break; // processing_my(data); end; Thanks

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• Twitter Oauth Strategy with Warden + Devise Authentication Gems for Ruby

  - by Michael Waxman

  Devise, the authentication gem for Ruby based on Warden (another auth gem) does not support Twitter Oauth as an authentication strategy, BUT Warden does. There is a way to use the Warden Twitter Oauth strategy within Devise, but I cannot figure it out. I'm using the following block in the devise config file: config.warden do |manager| manager.oauth(:twitter) do |twitter| twitter.consumer_secret = <SECRET> twitter.consumer_key = <KEY> twitter.options :site => 'http://twitter.com' end manager.default_strategies.unshift :twitter_oauth end But I keep on getting all sorts of error messages. Does anyone know how to make this work? I'm assuming there is more to do here (configuring a new link/route to talk to Warden, maybe adding attributes to the Devise User model, etc.), but I can't figure out what they are. Please help.

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• How to query the like count of a facebook object such as a album or photo via fql?

  - by hip10

  Hi, Here is a tricky question, how do you get the like count of a facebook object such as an album or a photo? I know that facebook has a fql table called link_stat that allow you to get the like count for an external url, but it does not seem to work if the object is within facebook. If you access the likes via the opengraph api on a particular object, it will only return a maximum of 4 users that like the object, even though there maybe a few thousand users that like it. Any clues?

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• Throw exception from initializer list

  - by aaa

  hello. what is the best way to throw exception from initializer list? for example: class C { T0 t0; // can be either valid or invalid, but does not throw directly T1 t1; // heavy object, do not construct if t0 is invalid, by throwing before C(int n) : t0(n), // throw exception if t0(n) is not valid t1() {} }; I thought maybe making wrapper, e.g. t0(throw_if_invalid(n)). What is the practice to handle such cases? Thanks

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• Singleton again, but with multi-thread and Objective-C

  - by Tonny Xu

  I know Singleton pattern has been discussed so much. But because I'm not fully understand the memory management mechanism in Objective-C, so when I combined Singleton implementation with multithreading, I got a big error and cost me a whole day to resolve it. I had a singleton object, let's call it ObjectX. I declared an object inside ObjectX that will detach a new thread, let's call that object objectWillSpawnNewThread, when I called [[ObjectX sharedInstance].objectWillSpawnNewThread startNewThread]; The new thread could not be executed correctly, and finally I found out that I should not declare the object objectWillSpawnNewThread inside the singleton class. Here are my questions: How does Objective-C allocate static object in the memory? Where does Objective-C allocate them(Main thread stack or somewhere else)? Why would it be failed if we spawn a new thread inside the singleton object? I had searched the Objective-C language [ObjC.pdf] and Objective-C memory management document, maybe I missed something, but I currently I could not find any helpful information.

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• Use a "x-dom-event-stream" stream in javascript ?

  - by rnaud

  Hello, HTML5 draft contains an API called EventSource to stream data (notifications) trough javascript using only one server call. Looking it up, I found an exemple on Opera Labs of the javascript part : document.getElementsByTagName("event-source")[0] .addEventListener("server-time", eventHandler, false); function eventHandler(event) { // Alert time sent by the server alert(event.data); } and the server side part : <?php header("Content-Type: application/x-dom-event-stream"); while(true) { echo "Event: server-time\n"; $time = time(); echo "data: $time\n"; echo "\n"; flush(); sleep(3); } ?> But as of today, it seems only Opera has implemented the API, neither Chrome nor Safari have a working version (Am I wrong here ?) So my question is, is there any other way in javascript, maybe more complex, to use this one stream to get data ?

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• Install app on Motorola Backflip from AT&T

  - by eric

  I'm trying to test an app out on the Motorola Backflip with AT&T as the carrier. I checked USB debugging on the phone's Development screen. Using Eclipse, how do I get the app to load on the Backflip so I can test it? DDMS shows a device with a bunch of question marks and unkown. Seems that it only gives me the option to load the app on the SD card which doesn't do me any good. I searched and found a Motorola driver which I'm supposed to install to the adb folder. Where is that folder? I've checked the phone and on my development machine. Maybe I need new glasses?

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• Navigate between screens in WPF

  - by Greg R

  This should be a very basic design question, but for some reason it doesn't seem to be well documented (maybe due to its simplicity?). If I'm building a dashboard application in WPF that brig up different CRM tasks and I want to navigate between screens, is this the best way to do this, or is there a better way? So for example I have Log In Screen - Main Menu Screen - Screen to one of different utilities var orderManagerWindow = new MyXamlView(); var loginWindow = Application.Current.MainWindow; orderManagerWindow.Left = loginWindow.Left; orderManagerWindow.Top = loginWindow.Top; Application.Current.MainWindow = orderManagerWindow; orderManagerWindow.Show(); loginWindow.Close(); I would really appreciate help and suggestions!

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• OOP Design of items in a Point-of-Sale system

  - by Jonas

  I am implementing a Point-of-Sale system. In the system I represent an Item in three places, and I wounder how I should represent them in OOP. First I have the WarehouseItem, that contains price, purchase price, info about the supplier, suppliers price, info about the product and quantity in warehouse. Then I have CartItem, which contains the same fields as WarehouseItem, but adds NrOfItems and Discount. And finally I have ReceiptItem, thats contains an item where I have stripped of info about the supplier, and only contains the price that was payed. Are there any OOP-recommendations, best-practices or design patterns that I could apply for this? I don't really know if CartItem should contain (wrap) an WarehouseItem, or extend it, or if I just should copy the fields that I need. Maybe I should create an Item-class where I keep all common fields, and then extend it to WarehouseItem, CartItem and ReceiptItem. Sometimes I think that it is good to keep the field of the item and just display the information that is needed.

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• Windows Live Writer plugin with .NET 4

  - by Steve Dunn

  Has anyone written a plugin for Windows Live Writer that runs against .NET 4? I've read the .NET 4 introduces side-by-side running, so one part of the app can target .NET x and another part can target .NET 4. I thought WLW would be a good starting point to try this as previously it only supported plugins up to .NET 2. But my .NET 4 plugin never shows. Maybe they test dependencies before loading the plugins? Anyone else got this working?

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• Why do people still use Vi and Emacs?

  - by mawg

  This is not a subjective question. I am genuinely looking for techinccal reasons to do so. I will risk offending some folks (not intended as an offence – maybe as a goad) by saying that I have been coding for 30+ years and used to be religously attched to each of them, but as soone as I saw editor-cum-IDE which seemed to offer more, I moved on. Is there any compelling reason, in this day and age, to choose Vi / Emacs over – say- Eclipse for code editing? Even Notepad++ for win-doze users seems to offer more. Just sayin'

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• Best practices for defining and initializing variables in web.xml and then accessing them from Java

  - by DutrowLLC

  I would like to define and initialize some variables in web.xml and the access the values of these variables inside my Java application. The reason I want to do this is because I would like to be able to change the values of these variables without having to recompile the code. What is the best practice for doing this? Most of the variables are just strings, maybe some numbers as well. Does the class that accesses the variables have to be a servlet? Thanks! Chris

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• CUDA compare arrays

  - by user315511

  Hello. Trying to make an app that will compare 1-to-multiple bitmaps. there is one reference bitmap and multiple other bitmaps. Result from each compare should be new bitmap with diffs. Maybe comparing bitmaps rather as textures than arrays? My biggest problem is making kernel accept more than one input pointer, and how to compare the data.. extern "C" __global__ void compare(float *odata, float *idata, int width, int height) works and following does not (i call the function with enough params) extern "C" __global__ void compare(float *odata, float *idata, float *idata2, int width, int height)

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• Runing directx samples on a Windows Mobile 6.1 device

  - by Sil

  Hi, I tried to run the directx samples from ..\Windows Mobile 6 SDK\Samples\PocketPC\CPP\win32\directx\d3dm\tutorials on m Samsung Omnia and on the emulator and it doesn't work because a deployment error. I am using Microsoft Visual Studio 2008 and have installed Windows Mobile SDK Standard and Professional refresh. The device is correctly plugged in and set up for active sync(I know this because other samples work, also a creating Win32 smart device and running it works) When I try to run the application it compiles without errors but the message: " There were deployment errors, Continue? Yes/No" appears If I manually copy the application from the debug folder to the device and run it from there, it works. The same deployment error message appears if I try it on an emulator. Other applications are deploying successfully. Is there any way to make the deployment work? Maybe there is an obscure option I need to set... Thank you

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• Having problems with a mask in C#

  - by Nard Dog

  I guess this would be a DevExpress mask, but here is what I have: var dlEdit = new DevExpress.XtraEditors.Repository.RepositoryItemTextEdit(); dlEdit.Mask.MaskType = MaskType.RegEx; dlEdit.Mask.EditMask = "\\d{1,10}"; I'm trying to get a number that can be up to 10 digits in length that WILL accept leading 0's, as it is now it will show the leading 0's (ex. 0032421243) until the field is clicked off in which case it removes them. I tried a numeric masktype but same thing only it wouldn't let me enter the 0's to start with at all. I thought this would be my answer but this custom type isn't. Can someone point me in the right direction for what I need? Maybe a different type of mask or something?

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• Survey on logging classes / frameworks / writers

  - by ts

  I am curious what writers (handlers, loggers) are you using. Text file and db its quite obvious, but what are other possibilities ? Firephp maybe (as in Zend_Log), mail, jabber, url ? Is anyone using syslog() or error_log() ? Are you using streams (especially custom ones) ? Are you using custom error levels or you limit yourself to predefined values? Are you logging common php errors / warning / notices? And last question - is there anything new in the town, worth consideration, apart of Zend_Log ? Or are you using your homebrew class?

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