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  • Serial Mac OS X constantly freezes/locks/dissappears for USB to Arduino

    - by Niraj D
    I have a problem with my C++ code running in Xcode with both the AMSerial library as well as the generic C (ioctl, termios). After a fresh restart, my application works well but after I "kill" the program the Serial (I think) is not released. I have checked my open files under /dev and have killed the connection to serial USB from there, but my C++ still can't open the USB port. I have narrowed this down to being a low level Mac OS X issue, regarding blocking the port indefinitely, regardless of closing it using the aforementioned libraries. Just for context, I'm trying to send numbers through my USB port, serially to an Arduino Duemilanove at 9600 baud. Running Serial Monitor in Arduino is perfectly fine, however, running through a C++ application it freezes up my computer, occasionally, my mouse/keyboard freeze up: requiring a hard reset. How can this problem be fixed? It seems like Mac OS X is not USB friendly!

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  • Switching from MDI to SDI and Back Again

    - by Mike Hofer
    This sounds like it would be a simple task, but I'm running into some issues. I have some fairly straightforward code for my C# application: private void SwitchToSdi() { MainWindow mainWindow = GetMainWindow(); for (int index = mainWindow.MdiChildren.Length - 1; index >= 0; index--) { Form form = mainWindow.MdiChildren[index]; if (!(form is MainWindow)) { form.Visible = false; form.MdiParent = null; form.Visible = true; mainWindow.MdiChildren[index] = null; } } mainWindow.IsMdiContainer = false; } And then, private void SwitchToMdi() { MainWindow mainWindow = GetMainWindow(); mainWindow.IsMdiContainer = true; for (int index = Application.OpenForms.Count - 1; index >= 0; index--) { Form form = Application.OpenForms[index]; if (!(form is MainWindow)) { form.Visible = false; form.MdiParent = mainWindow; form.Visible = true; } } } Note that MainWindow is an MDI parent window, with its IsMdiContainer property set to True. The user can toggle between MDI and SDI in the Options dialog. That much works beautifully. If I switch to SDI, the new windows open up OUTSIDE the main window, which is great. Similarly, if I switch to MDI, they open up inside the container. However, I've noticed a few things. Open MDI child windows don't become SDI windows as I would have expected them to. Open SDI windows don't become MDI child windows as I would have expected them to. Even after I set IsMdiContainer to true in the call to SwitchToMdi(), if I try to open a new window, I get an exception that tells me that the main window isn't an MDI container. o_O Someone please throw me a bone here. This shouldn't be rocket science. But I'm not finding a whole lot of useful help out there on the Intarwebs (read: g00gle is fairly useless). Has anyone actually implemented this behavior in .NET before? How did you achieve it? What am I missing here? Halp!

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  • VB6 App + .Net component working as compiled app but not in VB6 IDE

    - by Craig Johnston
    I have a VB6 App that uses a .Net component (via a .tlb reference in the VB6 app) which is working fine when executed as a compiled app, but it produces an error from the VB6 IDE a certain point when it is trying to use the .NET component. I should note that the error occurs when the .NET component is meant to be invoking a third party reporting component. What could the problem be? Could the VB6 IDE be looking in a different location for certain DLLs? The .tlb is in the same location as the application executable so I don't why there should be a problem. I need to have the application running in the IDE in order to debug and step through the code.

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  • java.net.SocketTimeoutException: Read timed out

    - by Rafael Soto
    Hi Folks, I have an application with client server architecture. The client use Java Web Start with Java Swing / AWT and the sert uses HTTP server / Servlet with Tomcat. The communication is made from the serialization of objects, create a ObjectOutput serializes a byte array and send to the server respectively called the ObjectInputStream and deserializes. The application follows communicating correctly to a certain time of concurrency where starting to show error "SocketException read timeout". The erro happens when the server invoke the method ObjectInputStream.getObject() in my servlet doPost method. The tomcat will come slow and the errors start to decrease server response time until the crash time where i must restart the server and after everything works. Someone went through this problem ?

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  • Logging strategy vs. performance

    - by vtortola
    Hi, I'm developing a web application that has to support lots of simultaneous requests, and I'd like to keep it fast enough. I have now to implement a logging strategy, I'm gonna use log4net, but ... what and how should I log? I mean: How logging impacts in performance? is it possible/recomendable logging using async calls? Is better use a text file or a database? Is it possible to do it conditional? for example, default log to the database, and if it fails, the switch to a text file. What about multithreading? should I care about synchronization when I use log4net? or it's thread safe out of the box? In the requirements appear that the application should cache a couple of things per request, and I'm afraid of the performance impact of that. Cheers.

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  • com.sun.management.OperatingSystemMXBean use in an OSGi bundle

    - by Paul Whelan
    I have some legacy code that was used to monitor my applications cpu,memory etc that I want to convert to a bundle. Now when i start this bundle its complaining Missing Constraint: Import-Package: com.sun.management; version="0.0.0" I had used the OperatingSystemMXBean to get access to stats on the JVM. My question is can I use this class inside an OSGI container and if so how? Or should I use some other way to monitor my application. I was making an RMI call to the application from a web frontend to get the nodes performance figures pre OSGi.

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  • MissingMethodException ( Can`t find PInvoke DLL 'sqlceme30.dll ' ) for Windows Mobile

    - by anyinfonet
    Hello. I have developed a win mobile (v5.0) application and I use ONLY 1 database SQLITE with these references: System.Data.SQLite.dll (assembly version & product version : 1.0.65.0); SQLite.Interop.065.DLL (product version : 1.0 and is a c++ lib for first dll ). After 5 weeks of using of this application, I get today a weird exception and I dont understand what it is? Exception is: MissingMethodException Can`t find PInvoke DLL 'sqlceme30.dll ' at System.Data.SqlServerCe.SqlCeCommand.ReleaseNativeInterfaces() at System.Data.SqlServerCe.SqlCeCommand.Dispose(Boolean disposing) ...... What`s wrong? Anyone know about this to explain me please? By the way : until now I delevoped 3-4 applications (1 year ago )using these references and everything worked fine.

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  • Cannot get Google Analytics API to register page views on iPhone

    - by Sebastien
    I would like to gather usage statistics for my iPhone app using Google Analytics so I'm trying to configure it using the following tutorial: http://code.google.com/intl/fr-FR/apis/analytics/docs/tracking/mobileAppsTracking.html I think I did everything they indicate in the documentation, and I get no error on the iPhone side, but I don't see any visits in Google Analytics. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{ [self initGoogleAnalytics]; //... } -(void)initGoogleAnalytics{ [[GANTracker sharedTracker] startTrackerWithAccountID:[[NSBundle mainBundle] objectForInfoDictionaryKey:@"GoogleAnalyticsCode"] dispatchPeriod:-1 delegate:nil NSError *error; if(![[GANTracker sharedTracker] trackPageview:@"/home" withError:&error]){ NSLog(@"%@", [error localizedDescription], nil); } [[GANTracker sharedTracker] dispatch]; } Any idea why this is not working?

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  • Wireframe mock-up software

    - by Dave Jarvis
    Requirements Looking for wireframe mock-up software for web apps with the following constraints: Desktop application (supports Linux) (can be online) Export all pages to separate image files (PNG or SVG preferred) Template for all pages Drag and drop standard HTML widgets for <forms> Tabbed panels (that allow content on the different tabs) Shuttle controls Saves in an XML format (XSLT could convert to HTML) Widget alignment and resizing (relative to other widgets) Under $100.00 USD Examples That come close: Cacoo - Not a desktop application; does not have a true tabbed panel widget Pencil - Export feature has serious bugs (missing text); no template? Balsamiq - Installation proved cantankerous on Linux (due to Adobe AIR) Mockingbird - No shuttle controls; no auto-resize of widgets Pencil & paper - Not a good look for a formal document presented to clients Any others that meet the requirements?

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  • Service and Web Reference crashes Visual Studio

    - by CatZ
    When I move the mouse over any of these two or right click any of them Visual Studio crashes with the following message in the event log: Felet uppstod i programmet med namn: devenv.exe, version 9.0.30729.1, tidsstämpel 0x488f2b50 , felet uppstod i modulen med namn: ntdll.dll, version 6.1.7600.16385, tidsstämpel 0x4a5bdb3b Undantagskod: 0xc0000374 Felförskjutning: 0x000cdcbb Process-ID: 0xef4 Programmets starttid: 0x01cb07b7f1bd036d Sökväg till program: C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\devenv.exe Sökväg till modul: C:\Windows\SysWOW64\ntdll.dll Rapport-ID: 46c92fc7-73ab-11df-b110-002481038dc3 Unfortunately it's the same thing in Visual Studio 2010 as it is in Visual Studio 2008. I have tried to repair the installation, reset all settings to default and Uninstall all plugins I have without any noticable results. Does anyone have any clue to what is going on? Salient part in English: Faulting application devenv.exe, version 9.0.30729.1, time stamp 0x488f2b50, faulting module ntdll.dll, version 6.1.7600.16385, time stamp 0x4a5bdb3b, exception code 0xc0000374, fault offset 0x000cdcbb, process id 0xef4, application start time 0x01cb07b7f1bd036d.

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  • Dynamically generate PDF and email it using django

    - by Shane
    I have a django app that dynamically generates a PDF (using reportlab + pypdf) from user input on an HTML form, and returns the HTTP response with an application/pdf MIMEType. I want to have the option between doing the above, or emailing the generated pdf, but I cannot figure out how to use the EmailMessage class's attach(filename=None, content=None, mimetype=None) method. The documentation doesn't give much of a description of what kind of object content is supposed to be. I've tried a file object and the above application/pdf HTTP response. I currently have a workaround where my view saves a pdf to disk, and then I attach the resulting file to an outgoing email using the attach_file() method. This seems wrong to me, and I'm pretty sure there is a better way.

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  • How to check a print job status with C#

    - by Saab
    I'm printing a PDF file by executing a commandline application from within my C# application. Now I wanna know when this job is printed. I was hoping there would be some kind of event I could subscribe to, and handle it. But I couldn't find it. So now I'm resorting to polling. And checking the JobStatus of a PrinterSystemJobInfo object. But in my case this either gives me JobStatus = None or JobStatus = Printing. PrinterSystemJobInfo.JobStatus Can someone tell me how to reliably check a print job status using C#?

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  • silverlight 3.0 communication with winforms

    - by abusemind
    I would like to create a winform on the client side for interaction with Silverlight 3.0. The basic idea is using the winform browser. I definitely need both the directions of communication. Would it be impossible by using JavaScript as a midware for the interaction or some better ways? Or is there any new features of Silverlight 3.0 supported for this kind of winform application communication? The original one is one the client's browser to run but now I would like to migrate it to the winform application. For the sake of time-saving, please don't mention about the WPF because of the gap between WPF and the Silverlight.

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  • What are the "allowedTypes" for .rar file (interceptor "fileUpload") in struts2?

    - by Tr.Crab
    <package name="my-default" extends="struts-default" namespace="/"> <interceptors> <interceptor-stack name="globalInterceptor"> ..... <interceptor-ref name="fileUpload"> <param name="maximumSize">1048576</param> <param name="allowedTypes">application/x-rar-compressed</param> </interceptor-ref> ..... </interceptor-stack> </interceptors> .... </struts> I want to mine type for .rar file in struts2 which interceptor "fileUpload", but when I define "allowedTypes" which "application/x-rar-compressed", It doesn't work. How can I resolve this?

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  • Visual Studio: How to protect file from removal on uninstall

    - by raj.tiwari
    Folks, I am creating an installer project in Visual Studio. This is done using a project of type "Setup and Deployment". I lay out the file structure of my final install in the "File System" View of the project. Now, some of the files I create as part of my install are updated while my application is used. I would like these files to not be removed during an uninstall of my application. Is there any way in Visual Studio to designate a file as "protected from uninstall"? Thanks for your help.

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  • How can I update information in an Android Activity from a background Service

    - by tmm
    Hello, I am trying to create a simple Android application that has a ActivityList of information, when the application starts, I plan to start a Service that will be constantly calculating the data (it will be changing) and I want the ActivityList to be in sync with the data that the service is calculating for the life of the app. How can I set up my Activity to be listening to the Service? Is this the best way to approach this problem? For example, if you imagine a list of stock prices - the data would be being changed regularly and need to be in sync with the (in my case) Service that is calculating/fetching the data constantly. Thanks in advance

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  • Find coordinate by angle

    - by George Johnston
    I am developing in application in XNA which draws random paths. Unfortunately, I'm out of touch with graphing, so I'm a bit stuck. My application needs to do the following: Pick a random angle from my origin (0,0), which is simple. Draw a circle in relation to that origin, 16px away (or any distance I specify), at the angle found above. (Excuse my horrible photoshoping) The second circle at (16,16) would represent a 45 degree angle 16 pixels away from my origin. I would like to have a method in which I pass in my distance and angle that returns a point to graph at. i.e. private Point GetCoordinate(float angle, int distance) { // Do something. return new Point(x,y); } I know this is simple, but agian, I'm pretty out of touch with graphing. Any help? Thanks, George

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  • Core data and special characters (UTF-8)

    - by MW
    I have an iPhone application using Core Data with an SQLite database in the bottom. I'm writing some text content from the database to a file, but special characters such as Å, Ä and Ö are corrupted in the file (they show up just fine in the application). When creating and inserting data, I am not using any special encoding. I'm just taking the NSString (entered by the user in a UITextField) and putting it in my persistent objects. When saving the file, I use the following code: [csvString writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:&error]; I tried adding a BOM to the beginning of the text ("\xef\xbb\xbf") but it is still corrupted. Anyone has any ideas where the problem might be? Examples of corrupted characters: å becomes ö, ä becomes ä

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  • XAML Serialization object not using asp.net shadow copy

    - by mrwayne
    Hi, I'm having a problem where i use the XAML serializer / deserializer for a configuration type file that i have. The problem that i'm getting, is that the XAML serializer is returning objects from the assembly in the /Bin directory, while the rest of the web application is using assembly's stored in the ..../Temporary Files/.. directory. Is there any way to prevent this from happening? Is this a bug in the XAML serializer / assembly loading routines? Every time i compile i need to stop and start the asp.net application so the shadow copy and the bin are exactly the same file. Even when not making a change to the dll and recompiling still causes the problem. Any thoughts on how to get around this problem? Currently i've tried turning shadow copy off, but then i have the same problem of needing to shut down / start up the web app every time i compile. Help!

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  • Facebook Connect 'next' error

    - by Mark
    I am trying to experiment with the new facebook authentication system, and I can't getthe login to work. I'm getting the following error message: API Error Code: 100 API Error Description: Invalid parameter Error Message: next is not owned by the application. The url that is being sent to facebook is: http://www.facebook.com/connect/uiserver.php?app_id=444444444444444&next=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%23%3F%3D%26cb%3Df357eceb0361a8a%26origin%3Dhttp%253A%252F%252Fwww.mysite.com%252Ff38fea4f9ea573%26relation%3Dopener%26transport%3Dpostmessage%26frame%3Df23b800f8a78%26result%3DxxRESULTTOKENxx&display=popup&channel=http%3A%2F%2Fwww.mysite.com%2Ffbtester.php&cancel=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%23%3F%3D%26cb%3Df6095a98598be8%26origin%3Dhttp%253A%252F%252Fwww.mysite.com%252Ff38fea4f9ea573%26relation%3Dopener%26transport%3Dpostmessage%26frame%3Df23b800f8a78%26result%3DxxRESULTTOKENxx&locale=en_US&return_session=1&session_version=3&fbconnect=1&canvas=0&legacy_return=1&method=permissions.request Note that the 'Next' variable in the url is: next=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%23%3F%3D%26cb%3Df357eceb0361a8a%26origin%3Dhttp%253A%252F%252Fwww.mysite.com%252Ff38fea4f9ea573%26relation%3Dopener%26transport%3Dpostmessage%26frame%3Df23b800f8a78%26result%3DxxRESULTTOKENxx Any ideas what could be going wrong? All I've done is copy and paste the facebook login demo code from facebook's website: <?php define('FACEBOOK_APP_ID', 'your application id'); define('FACEBOOK_SECRET', 'your application secret'); function get_facebook_cookie($app_id, $application_secret) { $args = array(); parse_str(trim($_COOKIE['fbs_' . $app_id], '\\"'), $args); ksort($args); $payload = ''; foreach ($args as $key => $value) { if ($key != 'sig') { $payload .= $key . '=' . $value; } } if (md5($payload . $application_secret) != $args['sig']) { return null; } return $args; } $cookie = get_facebook_cookie(FACEBOOK_APP_ID, FACEBOOK_SECRET); ?> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml"> <body> <?php if ($cookie) { ?> Your user ID is <?= $cookie['uid'] ?> <?php } else { ?> <fb:login-button></fb:login-button> <?php } ?> <div id="fb-root"></div> <script src="http://connect.facebook.net/en_US/all.js"></script> <script> FB.init({appId: '<?= FACEBOOK_APP_ID ?>', status: true, cookie: true, xfbml: true}); FB.Event.subscribe('auth.login', function(response) { window.location.reload(); }); </script> </body> </html> Thanks for the help!

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  • Accessing Content from MDF after attached to SQL

    - by Fidelis
    Hello, I am using WSS 3.0 and trying to restore a mdf. I attached the database in SQL Management Studio, created a new web application, and associated the database to it. When I go into Central Administration- Application Management - Content Databases I see the WSS_Content and it says Sites: 2. One of the sites looks more similar to the other. I was able to log into the Sharepoint web app that has the db attached to it, and while it gives me the basic structure of the backed up site, the content of lists is blank, that was the data I was really after (Announcements, tasks, etc exist as lists but are empty). How do I get access to this?

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  • How safe am I singing into Google Spreadsheets with yeroon.net/ggplot2

    - by Farrel
    I am impressed by what I have seen of yeroon.net/ggplot2 which is a web interface for Hadley Wickham's R package ggplot2. I want to try it out on my own data. The part that has me very excited is that one can use data stored in one's own Google spreadsheet as the data. One just signs into their Google Account so that yeroon.net/ggplot2 can access the spreadsheet list. I have been hesitant to do it. If I sign in whilst on yeroon.net am I handing over my username and password to a third party? It would not be wise of me to divulge my google password to third parties since Google is fast becoming my repository of everything. How do I know if Jeroon's application is using ClientLogin or OAuth? My understanding is very basic and may be wrong but nevertheless here it is. OAuth would be better since it does not actually pass the password onto the third party application.

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  • Cant delete more than 200 contacts in HTC HERO

    - by rahul
    I'm working on security application which will copy all contacts to some other database and delete all contacts from phonebook. I'm testing this on android HTC HERO. I'm successful to delete contacts from phonebook and create new contact info database, Till 200 it is working, but after 200 contacts its not working properly. After tht application starts throwing error. There is one Sync with Google Option in MenuSettingData Sync, I think that is creating problem. There is notification that "Too many contacts deleted" n if i click tht there will b a dialog with title "Delete Limit exceeded". Is there anything i can do to stop syncronization or any other ideas by which i can achieve required output? Please Help me on this

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  • Asynchronous readback from opengl front buffer using multiple PBO's

    - by KillianDS
    I am developing an application that needs to read back the whole frame from the front buffer of an openGL application. I can hijack the application's opengl library and insert my code on swapbuffers. At the moment I am successfully using a simple but excruciating slow glReadPixels command without PBO's. Now I read about using multiple PBO's to speed things up. While I think I've found enough resources to actually program that (isn't that hard), I have some operational questions left. I would do something like this: create a series (e.g. 3) of PBO's use glReadPixels in my swapBuffers override to read data from front buffer to a PBO (should be fast and non-blocking, right?) Create a seperate thread to call glMapBufferARB, once per PBO after a glReadPixels, because this will block until the pixels are in client memory. Process the data from step 3. Now my main concern is of course in steps 2 and 3. I read about glReadPixels used on PBO's being non-blocking, will this be an issue if I issue new opengl commands after that very fast? Will those opengl commands block? Or will they continue (my guess), and if so, I guess only swapbuffers can be a problem, will this one stall or will glReadPixels from front buffer be many times faster than swapping (about each 15-30ms) or, worst case scenario, will swapbuffers be executed while glReadPixels is still reading data to the PBO? My current guess is this logic will do something like this: copy FRONT_BUFFER - generic place in VRAM, copy VRAM-RAM. But I have no idea which of those 2 is the real bottleneck and more, what the influence on the normal opengl command stream is. Then in step 3. Is it wise to do this asynchronously in a thread separated from normal opengl logic? At the moment I think not, It seems you have to restore buffer operations to normal after doing this and I can't install synchronization objects in the original code to temporarily block those. So I think my best option is to define a certain swapbuffer delay before reading them out, so e.g. calling glReadPixels on PBO i%3 and glMapBufferARB on PBO (i+2)%3 in the same thread, resulting in a delay of 2 frames. Also, when I call glMapBufferARB to use data in client memory, will this be the bottleneck or will glReadPixels (asynchronously) be the bottleneck? And finally, if you have some better ideas to speed up frame readback from GPU in opengl, please tell me, because this is a painful bottleneck in my current system. I hope my question is clear enough, I know the answer will probably also be somewhere on the internet but I mostly came up with results that used PBO's to keep buffers in video memory and do processing there. I really need to read back the front buffer to RAM and I do not find any clear explanations about performance in that case (which I need, I cannot rely on "it's faster", I need to explain why it's faster). Thank you

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