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Articles indexed Thursday June 3 2010

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  • How to write configurable Embedded C code which can run on multihardware platform

    - by Adnan
    Hello all , What are the techniques used to write an embedded C software which has multi features. Features can be configurable for multi-hardware platform. I have developed a firmware based on a RTOS for ARM7. Now i want to make it a baseline firmware which can be used with similar, more or less features (configurable) on different microcontrollers, like MSP, or AVR etc. Being more specific, if i want to change different features of firmware for one hardware and others for the second. What technique should i adopt and is there any study material available. Regards

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  • Explanation of WCF application life cycle in IIS 6 hosting environment.

    - by David Christiansen
    Hi all and thanks for reading, I have a delay issue where my application takes a long time to start up when first called after an determinate period since the last call. The web application is a WCF service and we are talking about a delay of ~18seconds before the actual processing starts. Now, I believe I know how to reduce this delay so that is not my question (it's more a stackoverflow deal anyway) My question is, Can anyone explain to me why is it that despite me disabling worker process shutdown, and worker process recycling the application still 'winds down' after a indeterminate period of time of inactivity? To understand this I need to know more about the innerworkings of WCF services hosted in IIS. I fully expect there to be a straight forward answer to this. Thank you v. much for any help you may offer, DC

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  • Making Wix uninstall an old plug-in when performing an upgrade

    - by IanM
    I have a main product which is installed using Wix and has its own UpgradeCode In between releases of the main product we sometimes release plug-ins which add or patch some functionality. The plug-ins are packaged in their own Wix generated .msi files with their own UpgradeCodes and generally install addition files is a separate folder from the main product. I want to create a new version of the main product which includes the functionality which was previously available in a plug-in. A user upgrading to the new version will no longer need the plug-in so it would be nice to uninstall it as part of the upgrade. Is there a way of making Wix uninstall a product with UpgradeCode2 when it is upgrading product with UpgradeCode1?

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  • Cracking the Playfair cipher

    - by wwrob
    I have the ciphertext and an encrypting program (with the key hardcoded in). How would I go about finding the key? Surely the availability of the encryptor must open up possibilities beyond brute-forcing it.

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  • How to calculate a RTOS task's time

    - by Adnan
    Hello all, I have written a code in c for Arm7 using RTOS. There are multiple tasks who's priority is set to same level. So the tasks executes on round-robin base. There is an exception that one task (Default) has set to lower priority then the other task in rtos. So that if no task is running, the default or lower priority task runs. Now i want to calculate the exact total timing (time duration) for that default task runs. Can any one give some idea what to do .... and how to do in code.. Regards Dani

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  • COM/DCOM problem when hosting executable is run as a service

    - by Mitch
    I am struggling for days now with the following problem: We have an executable that hosts a COM server, say x.exe. The COM object is instantiated as follows on the calling site: hRes = CoCreateInstance(CLSID_InterceptX, NULL, CLSCTX_SERVER, IID_IInterceptX, (void**)&pInterceptX); It all works fine when x runs as an regular application. We have a tool (I don't know how it works) that encapsulates x.exe so that it runs as a service under Windows (x.exe is a running process). In this case, we never receive a COM call in x.exe (validated by logging). Here is the weird part: From logging the calling site, I can tell that the COM object has been successfully instantiated and also the call to an interface function does not produce an error (SUCEEDED(hres) is true). Any ideas?

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  • How to get value of href in Jquery

    - by user342391
    I am trying to grab the value of my href in jquery how is it done'? This is what I have done: $('#playbackbutton').click( function() { $("#playbackdiv").load("$('a:href').val();", [], function(){ $("#playbackdiv").dialog("open"); } ); return false; } I need to get the value of the href in my a tag. here is the html: <a href="/record/123.wav">play</a>

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  • jquery load data

    - by nabizan
    dumbest question ever... but I want to somehow fill 'gid' value in data load gid = 123; from = 33; to = 44; $('#x').load('y', {'range['+gid+'][]' : [from , to]}); so I could get [range] => Array ( [123] => Array ( [0] => 33 [1] => 44 ) ) but with this syntax 'range['+gid+'][]' I get 'missing : after property id'. I'm desperate...

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  • Compile MvcContrib Portable Area with aspnet_compiler

    - by isuruceanu
    Hi I have a .net mvc 2 web application. I deployed this application using aspnet_compiler and a nant build file like <target name="deploy.advance.application"> <exec program="${aspnet.compiler}" commandline='-f -u -c -p ${dir.website.advance.application} -v temp ${dir.publish.advance.application}' /> <mkdir dir="${dir.publish.advance.application}\App_Data" /> </target> Now I started to implment PortableArea, at least LoginArea with all pages embedded, required by the MvcContrib PA. On my local machine works fine, but on testing environment (when I deploy the application with aspnet_compiler) the application could not found Login.aspx view. So the question is how to deploy such applications? There is a directive from aspnet_compiler to tell the compiler that there are some embedded resources? Thanks

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  • Deserialize Xml with empty elements in C#

    - by user204086
    Trying to deserialize some xml snippits into objects. The problem is that I'm getting an invalid format on every empy element tag. I can deserialize the object no problem when all of the elements have values. Or the empty elements are ommitted. Xml Snippit: <foo><propOne>1</propOne><propTwo /></foo> C# Class: [Serialilbe()] public class foo { public foo(){} [XmlElementAttribute(IsNullable = true)] public int? propOne {get;set;} [XmlElementAttribute(IsNullable = true)] public int? propTwo {get;set;} } Is there a setting on the class I can make to adjust the parsing? or Is there an easy way I can apply xsl to remove these elements? or Should I use regEx to remove the empty elements be fore desrializing? or an even better way?

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  • why headers of query results display sometimes in button sometimes in links format ?

    - by I Like PHP
    Hello All, it's just my curiosity to know that why phpmyadmin behavior in different manner when we modify query a bit( putting extra space) then headers of query results, sometime comes in Button format( on hover it say sort, but sorting not working at all) and sometimes in blue link is there any difference for this or it just causing by some othe reason? i m attaching both images. Button headers Link headers

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  • apache solr : sum of data resulted from group by

    - by Terance Dias
    Hi, We have a requirement where we need to group our records by a particular field and take the sum of a corresponding numeric field e.x. select userid, sum(click_count) from user_action group by userid; We are trying to do this using apache solr and found that there were 2 ways of doing this: Using the field collapsing feature (http://blog.jteam.nl/2009/10/20/result-grouping-field-collapsing-with-solr/) but found 2 problems with this: 1.1. This is not part of release and is available as patch so we are not sure if we can use this in production. 1.2. We do not get the sum back but individual counts and we need to sum it at the client side. Using the Stats Component along with faceted search (http://wiki.apache.org/solr/StatsComponent). This meets our requirement but it is not fast enough for very large data sets. I just wanted to know if anybody knows of any other way to achieve this. Appreciate any help. Thanks, Terance.

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  • Xcode Code Sense horribly broken?

    - by Philippe Leybaert
    Ever since I started using Xcode, I've experienced extremely annoying problems using Xcode and Code Sense. The problem is that when Code Sense kicks in for code completion, sometimes the source code text below the line I'm working on goes "crazy". If I continue typing, the problem gets worse, and after a while the source code is completely screwed up (funny colors, missing lines and characters, ...). Strange enough, the source code itself is unaffected, because when I select another source file and then go back to the one I was working on, everything looks fine again. The problem can be seen in this screencast: http://www.screencast.com/t/OGY3NWE5 Interesting facts: This problem has occurred on 3 different machines, so it's not related to a corrupt installation. Sometimes it's fine for a while (up to one hour) after launching Xcode, but once it starts happening, it's getting worse and worse, until Xcode is restarted. Then it's fine again (for a while) I've searched the web for similar experiences, and I can't find anything. I would think that it is a known problem, since it occurs on 3 different Macs here (both running 10.5 and 10.6). Anyone having the same problems? Or a suggestion for fixing this?

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  • Enterprise library not responding.

    - by Costa
    Hi I spent a day trying to make Ent Lib Logging work and log anything into database or event log, I have a web application and console application withe the same Ent Lib config, only the console is capable to log into the Event Log, I tried everything with permissions, but I don't know what exactly I am doing, which services should have what, It does not work!! HELP This is the config file which is automatically generated from Ent Lib utility and it works only on App.config, not on web.config <loggingConfiguration name="Logging Application Block" tracingEnabled="true" defaultCategory="General" logWarningsWhenNoCategoriesMatch="true" revertImpersonation="false"> <listeners> <add source="Logger" formatter="Text Formatter" log="Application" machineName="" listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FormattedEventLogTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" traceOutputOptions="None" filter="All" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FormattedEventLogTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="Formatted EventLog TraceListener" /> </listeners> <formatters> <add template="Timestamp: {timestamp}&#xD;&#xA;Message: {message}&#xD;&#xA;Category: {category}&#xD;&#xA;Priority: {priority}&#xD;&#xA;EventId: {eventid}&#xD;&#xA;Severity: {severity}&#xD;&#xA;Title:{title}&#xD;&#xA;Machine: {machine}&#xD;&#xA;Application Domain: {appDomain}&#xD;&#xA;Process Id: {processId}&#xD;&#xA;Process Name: {processName}&#xD;&#xA;Win32 Thread Id: {win32ThreadId}&#xD;&#xA;Thread Name: {threadName}&#xD;&#xA;Extended Properties: {dictionary({key} - {value}&#xD;&#xA;)}" type="Microsoft.Practices.EnterpriseLibrary.Logging.Formatters.TextFormatter, Microsoft.Practices.EnterpriseLibrary.Logging, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="Text Formatter" /> </formatters> <categorySources> <add switchValue="All" name="General"> <listeners> <add name="Formatted EventLog TraceListener" /> </listeners> </add> </categorySources> <specialSources> <allEvents switchValue="All" name="All Events" /> <notProcessed switchValue="All" name="Unprocessed Category" /> <errors switchValue="All" name="Logging Errors &amp; Warnings"> <listeners> <add name="Formatted EventLog TraceListener" /> </listeners> </errors> </specialSources> </loggingConfiguration> thanks

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  • AJAX get data from large HTML page as the large HTML page loads

    - by Ed
    Not entirely sure whether this has a name but basically I have a large HTML page that is generated from results in a db. So viewing the HTML page (which is a report) in a browser directly does not display all contents immediately but displays what it has and additional HTML is added as the results from the DB are retrieved... Is there a way I can make an AJAX request to this HTML page and as opposed to waiting until the whole page (report) is ready, I can start processing the response as the HTML report is loaded? Or is there another way of doing it? Atm I make my AJAX response it just sits there for a minute or two until the HTML page is complete... If context is of any use: The HTML report is generated by a Java servlet and the page making the AJAX call is a JSP page. Unfortunately I can't very easily break the report up because it is generated by BIRT (Eclipse reporting extension). Thanks in advance.

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  • Exchange 2007 Backup - For a newbie

    - by mew3900
    I am trying to setup an exchange 2007 backup solution. After doing a lot of reading, Microsoft have decided in server 2008 unless you are willing to spend a great deal on a 3rd party solution you are pretty stuck! Essentially what I have been asked to do is perform an off-line file backup of our current exchange server and replicate this onto a new 2nd server. The reasoning behind this is that we need to upgrade our current installation of exchange 2007 to SP2 so that the exchange plug-in for windows server backup will be available to us. From this I can then actually take an exchange aware backup weekly and take it off site. Ideally then also we can migrate to this new server and keep the old one as a fail over. Is there a way I can copy across the files required onto a second server, although I doubt very much it is that simple. I may be barking up completely the wrong tree, however I have very limited knowledge with Exchange and any help and advice on how I would resolve this would be much appreciated. Thanks in advance

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  • Firewall for internal networks

    - by Cylindric
    I have a virtualised infrastructure here, with separated networks (some physically, some just by VLAN) for iSCSI traffic, VMware management traffic, production traffic, etc. The recommendations are of course to not allow access from the LAN to the iSCSI network for example, for obvious security and performance reasons, and same between DMZ/LAN, etc. The problem I have is that in reality, some services do need access across the networks from time to time: System monitoring server needs to see the ESX hosts and the SAN for SNMP VSphere guest console access needs direct access to the ESX host the VM is running on VMware Converter wants access to the ESX host the VM will be created on The SAN email notification system wants access to our mail server Rather than wildly opening up the entire network, I'd like to place a firewall spanning these networks, so I can allow just the access required For example: SAN SMTP Server for email Management SAN for monitoring via SNMP Management ESX for monitoring via SNMP Target Server ESX for VMConverter Can someone recommend a free firewall that will allow this kind of thing without too much low-level tinkering of config files? I've used products such as IPcop before, and it seems to be possible to achieve this using that product if I re-purpose their ideas of "WAN", "WLAN" (the red/green/orange/blue interfaces), but was wondering if there were any other accepted products for this sort of thing. Thanks.

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  • Implementing the procducer-consumer with .NET 4.0 new

    - by bitbonk
    With alle the new paralell programming features in .NET 4.0, what would be a a simple and fast way to implement the producer-consumer pattern (where at least one thread is producing and enqueuing task items and one other thread executes (dequeues) these tasks). Can we benfit from all these new APIs? What is your preferred implementation of this pattern?

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