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• Controlling the USB from Windows

  - by b-gen-jack-o-neill

  Hi, I know this probably is not the easiest thing to do, but I am trying to connect Microcontroller and PC using USB. I dont want to use internal USART of Microcontroller or USB to RS232 converted, its project indended to help me understand various principles. So, getting the communication done from the Microcontroller side is piece of cake - I mean, when I know he protocol, its relativelly easy to implement it on Micro, becouse I am in direct control of evrything, even precise timing. But this is not the case of PC. I am not very familiar with concept of Windows handling the devices connected. In one of my previous question I ask about how Windows works with devices thru drivers. I understood that for internal use of Windows, drivers must have some default set of functions available to OS. I mean, when OS wants to access HDD, it calls HDD driver (which is probably internal in OS), with specific "questions" so that means that HDD driver has to be written to cooperate with Windows, to have write function in the proper place to be called by the OS. Something similiar is for GPU, Even DirectX, I mean DirectX must call specific functions from drivers, so drivers must be written to work with DX. I know, many functions from WinAPI works on their own, but even "simple" window must be in the end written into framebuffer, using MMIO to adress specified by drivers. Am I right? So, I expected that Windows have internal functions, parts of WinAPI designed to work with certain comonly used things. To call manufacturer-designed drivers. But this seems to not be entirely true becouse Windows has no way to communicate thru Paralel port. I mean, there is no function in the WinAPI to work with serial port, but there are funcions to work with HDD,GPU and so. But now there comes the part I am getting very lost at. So, I think Windows must have some built-in functions to communicate thru USB, becouse for example it handles USB flash memory. So, is there any WinAPI function designed to let user to operate USB thru that function, or when I want to use USB myself, do I have to call desired USB-driver function myself? Becouse all you need to send to USB controller is device adress and the infromation right? I mean, I don´t have to write any new drivers, am I right? Just to call WinAPI function if there is such, or directly call original USB driver. Does any of this make some sense?

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• Can I store arbitrary text information in a .avi file?

  - by dronad

  I would like to add some test annotations (xml file) into an avi file as food for a later program that will process it. Is this done/doable ... ideally like a c# library to help me access and read/write the avis. ?

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• As a web developer, which browser do you prefer, and why? [closed]

  - by Scott Ferguson

  If you are a web developer: Which web browser do you use as your primary development tool. Why? What killer feature(s) does your browser of choice give you that helps you write better web applications?

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• Which logging library to use for cross-language (Java, C++, Python) system

  - by recipriversexclusion

  I have a system where a central Java controller launches analysis processes, which may be written in C++, Java, or Python (mostly they are C++). All these processes currently run on the same server. What are you suggestions to Create a central log to which all processes can write to What if in the future I push some processes to another server. How can I support distributed logging? Thanks!

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• Skip first letters of all values returned from a sql server database

  - by Peter

  Hi, as topic says, I don't want to return the first two letters in the return values just an example: select companyname from companies returns companyX Can I write a query that returns panyX instead? Thanks in advance

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• Bash:Redirection Halts

  - by user365828

  I have a command e.g. ls-l file.txt When there is insufficient space on my drive, the above command just stalls waiting for something to happen. Does anyone know about a code that I could write enabling me to display a message about the lack of space on my drive? E.g. could I use IPC or do you have any other ideas? Thanks in advance.

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• What are some good programming practice to use to keep your code clean and readable?

  - by ggfan

  I am still relatively new to programming and as I start to write longer and more complex codes, it gets very confusing and hard to reread. Are there some general good practices that every programmer should use?

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• Http download stream in PHP and MySQL

  - by Vishal

  Hello, How can I read from mysql and write the same in http output stream. So its like if send a request http://www.xyz.com/download/A it should return me data for A from mysql through php. The data is plain text. Thanks PS: I am new to php.

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• Getting a count of users each day in Mondrian MDX

  - by user1874144

  I'm trying to write a query to give me the total number of users for each customer per day. Here is what I have so far, which for each customer/day combination is giving the total number of user dimension entries without splitting them up by customer/day. WITH MEMBER [Measures].[MyUserCount] AS COUNT(Descendants([User].CurrentMember, [User].[User Name]), INCLUDEEMPTY) SELECT NON EMPTY CrossJoin([Date].[Date].Members, [Customer].[Customer Name].Members) ON ROWS, {[Measures].[MyUserCount]} on COLUMNS FROM [Users]

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• permutation of array

  - by davit-datuashvili

  for example i have array int a[]=new int[]{3,4,6,2,1}; I need list of all permutation such that if one is like this, {3,2,1,4,6}, others must not be the same i know that if length of array=n then there is n! possible combination please help me to write this algortihm what to do?

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• Any way to automatically run some script/EXE when exiting from the VB6 IDE?

  - by Clay Nichols

  I'd like to run a script to do a SVN checkin automatically when exiting the VB6 IDE. Is there any easy way to do that from within the IDE? (I guess I could write a script that launches the vb6 ide, waits for it to exit, then runs the script, but I'm hoping for something simpler).

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• Visual Studio solution parser

  - by gsirianni

  I'm looking for a tool that reads a .sln file and parses out all the sub projects and then parses all the sub project files into a list so that I can write a build list for a release? I just want the directory structure of the entier solution minus any excess that may exist in the solution's directory structure.

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• Is it possible to color-code and format an XML document using XSLT?

  - by Eric

  Has this ever been done before? Is it possible to write an XSLT that will turn an XML document into color-coded, formatted, HTML?

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• Can I use an abstract class instead of a private __construct() when creating a singleton in PHP?

  - by Pheter

  When creating a Singleton in PHP, I ensure that it cannot be instantiated by doing the following: class Singleton { private function __construct() {} private function __clone() {} public static function getInstance() {} } However, I realised that defining a class as 'abstract' means that it cannot be instantiated. So is there anything wrong with doing the following instead: abstract class Singleton { public static function getInstance() {} } The second scenario allows me to write fewer lines of code which would be nice. (Not that it actually makes much of a difference.)

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• I can't see any trace output in ASP.NET

  - by asksuperuser

  In Visual Studio 2010 I added Trace to Page_Load as explained here http://www.asp101.com/articles/robert/tracing/default.asp but I can't see any Trace output, why ? public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Trace.IsEnabled = true; Trace.Write("Hello World"); } }

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• Is it possible to make svn execute a script each time when someone commited something?

  - by user198729

  I've install subversion, and want to write my own script to automate the web deployment. Is it possible to trigger the script when commiting? It's neither ssh nor apache based, only rely on svnserve.

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• Query scope within a table trigger in an Oracle database

  - by sisslack

  I'm been trying to write a table trigger the queries another table that is outside the schema where the trigger will reside. Is this possible? It seems like I have no problem querying tables in my schema but I get: Error: ORA-00942: table or view does not exist when trying trying to query tables outside my schema. The documentation seems to elude to this notion, but it's not 100% clear to me.

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• ReSharper show warning with SqlDataReader

  - by Belousov Pavel

  When I write something like this: using (var connection = new SqlConnection("ConnectionString")) { using(var cmd= new SqlCommand("Command")) { using (var reader = cmd.ExecuteReader()) { while (reader.Read()) { } } } } ReSharper shows warning on reader.Read(), and tells that reader can be null. But in what cases can it be null? As I know if command returns nothing reader is not null, it only have nothing.

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• Make sure bad patterns don't come back after refactoring

  - by Let_Me_Be

  I'm refactoring an old C code. The code has absolutely no layered architecture (everything is being accessed by everything) and I'm trying to change that. I would like to cut direct access to structure members (at least write for now) and only allow access through access functions. Is there some tool (or perhaps directly the compiler) that could check this rule for me? I need this since I'm maintaining a fork and the upstream isn't very concerned with code quality.

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• Managing trace files on Sql Server 2005

  - by Sophtware

  I need to manage the trace files for a database on Sql Server 2005 Express Edition. The C2 audit logging is turned on for the database, and the files that it's creating are eating up a lot of space. Can this be done from within Sql Server, or do I need to write a service to monitor these files and take the appropriate actions? I found the [master].[sys].[trace] table with the trace file properties. Does anyone know the meaning of the fields in this table?

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• How can I validate a "does not match" type using CodeIgniter's Form Validation class?

  - by Shamoon

  I want to ensure that a certain text field does not contain a specific value. Is there any way for me to do this using CI's Form Validation class or do I have to write my own extension for it?

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• Git: submodule init and update from different folder

  - by jmccartie

  Trying to write a deployment script, working on a repo in a different path. The "git-dir" flag seems to work fine for most commands, but not for submodule work. Am I missing a path directive? Works: git --git-dir=/tmp/repo_path/.git log Doesn't work: git --git-dir=/tmp/repo_path/.git submodule init Error: No submodule mapping found in .gitmodules for path 'path_to/submodule' Much thanks for any help.

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• onclick event in combo box

  - by raam

  function ram(){ document.write("Hello World!") alert("ok"); } India Autralia England Ameriaca Pakistan In this above code the event will not fire for combo box ..i try by using focus and click event....i can i do this....and i want 1 more thing if i select combo box value as India,i want to create a combo box with state(elements are TN,DL..) updation...

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• Should I use Java for a custom Swing component designed for a clojure app?

  - by nansen

  I want a simple timeline component (like in video editing software) for a clojure/seesaw app and I am wondering if it is a good approach to implement this directly with clojure and seesaw or if I should write it in java and make my clojure wrapper around it. Or more generally: is a functional programming language optimal for writing UI widgets? I cannot imagine doing that without a lot of state involved. And wasn't OO invented for UI-development in the first place?

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• home directory and .emacs file in Windows 7

  - by prosseek

  I installed emacs 23.3.1 in c:/emacs-23.3. Following the hints in this page, I updated the site-start.el to set HOME environment variable. (setenv "HOME" "c:/users/USER/emacs") And I made c:/users/USER/.emacs (like I did in unix/mac) to write the code for using slime, but it doesn't seem to start slime correctly. Is this a correct way of setting emacs in Windows 7? Where do I put the .emacs file?

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