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  • Program LED with just USB port

    - by LifeH2O
    I want to control LED with C# using only USB port. I don't want to attach any other device with USB. I just want to attach LED directly to USB port pins and program it (blink etc). How can i do that? I am new to hardware programming and it will be my first program. EDIT: I can do it already (blink LED) using printer port by attaching one led pin to data pin and other to ground. How can i do the same with USB port? My motherboard does not have a printer port. USB is the only option.

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  • Fast response on first Socket I/O request but slow every other time when communicating with remote serial port

    - by GreenGodot
    I'm using sockets to pass Serial commands to a remote device. And the response to that request is sent back and printed out. However, I am having a problem in that the first time it is instant but the rest of the time it can take up to 20 seconds to receive a reply. I think the problem is with my attempt at threading but I am not entirely sure. new Thread() { @Override public void run() { System.out.println("opened"); try { isSocketRetrieving.setText("Opening Socket"); socket = new Socket(getAddress(), getRemotePort())); DataOutput = new DataOutputStream(socket .getOutputStream()); inFromServer = new BufferedReader( new InputStreamReader(socket .getInputStream())); String line = ""; isSocketRetrieving.setText("Reading Stream......"); while ((line = inFromServer.readLine()) != null) { System.out.println(line); if (line.contains(getHandshakeRequest())) { DataOutput.write((getHandshakeResponse()toString() + "\r").getBytes()); DataOutput.flush(); DataOutput .write((getCommand().toString() + "\r").getBytes()); DataOutput.flush(); int pause = (line.length()*8*1000)/getBaud(); sleep(pause); } else if (line.contains(readingObject .getExpected())) { System.out.println(line); textArea.append("value = " + line + "\n"); textAreaScroll.revalidate(); System.out.println("Got Value"); break; } } System.out.println("Ended"); try { inFromServer.close(); DataOutput.close(); socket.close(); isSocketRetrieving.setText("Socket is inactive..."); rs232Table.addMouseListener(listener); interrupt(); join(); } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { System.out.println("Thread exited"); } } catch (NumberFormatException e1) { e1.printStackTrace(); } catch (UnknownHostException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }.start();

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  • getting usb com port

    - by I__
    i have this function: private string GetUSBComPort() { string[] sPorts = SerialPort.GetPortNames(); foreach (string port in sPorts) { if (port != "COM1" && port != "COM4") { return port; } } return null; } this function is being called from form load: private void Form1_Load(object sender, EventArgs e) { serialPort1 = new SerialPort(GetUSBComPort()); if (serialPort1.IsOpen) { serialPort1.Close(); } serialPort1.Open(); //ThreadStart myThreadDelegate = new ThreadStart(ReceiveAndOutput); //Thread myThread = new Thread(myThreadDelegate); //myThread.Start(); this.serialPort1.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived); } the function is unfortunately returning null how do i get the com port to which my phone is attached to via USB?

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  • Socket c# not listen on port over internet?

    - by Nguy?n Van Th?ng
    Code server I have server listen on port 1450: //Using UDP sockets clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); EndPoint ourEP = new IPEndPoint(IPAddress.Any, 1450); //Listen asynchronously on port 1450 for coming messages (Invite, Bye, etc). clientSocket.Bind(ourEP); //Receive data from any IP. EndPoint remoteEP = (EndPoint)(new IPEndPoint(IPAddress.Any, 0)); byteData = new byte[1024]; //Receive data asynchornously. clientSocket.BeginReceiveFrom(byteData, 0, byteData.Length, SocketFlags.None, ref remoteEP, new AsyncCallback(OnReceive), null); but code on not open port 1450 and client connect: otherPartyIP = new IPEndPoint(IPAddress.Parse(txtCallToIP.Text), 1450); otherPartyEP = (EndPoint)otherPartyIP; When i run code client and server in lan network it's ok. but run over network i check port 1450 in lan not open. tell me how open port 1450 in code server? thanks

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  • How to switch data pins on/off on parallel port?

    - by Matt
    I want to simply switch certain data pins on and off, so that they can control a set of relays. I'm not asking about the hardware bit (should be easy), but I don't know where to begin writing the software. I don't want a high level library that can send bytes to a device - I literally want to switch on/off certain pins. I'm running Linux and I want to do this in Java, so would I just need a library? It would be nice if the library has good documentation and is easy to use, but if not then a short example code will help me get started.

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  • Google I/O 2010: Google TV Keynote - Introducing Google TV

    Google I/O 2010: Google TV Keynote - Introducing Google TV Due to licensing and permissions issues, we are unable to show the full Google TV demonstration from the Day 2 keynote at Google I/O. Until we are able to get these permissions, please check out these clips. For Google I/O session videos, presentations, developer interviews and more, go to: code.google.com/io From: GoogleDevelopers Views: 30 1 ratings Time: 06:55 More in Science & Technology

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  • Google I/O 2010: Google TV Keynote - Android Apps On Google TV

    Google I/O 2010: Google TV Keynote - Android Apps On Google TV Due to licensing and permissions issues, we are unable to show the full Google TV demonstration from the Day 2 keynote at Google I/O. Until we are able to get these permissions, please check out these clips. For Google I/O session videos, presentations, developer interviews and more, go to: code.google.com/io From: GoogleDevelopers Views: 8 0 ratings Time: 03:18 More in Science & Technology

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  • What is PubSubHubbub?

    What is PubSubHubbub? An overview of pubsubhubbub, a simple, open, web-hook-based pubsub protocol & open source reference implementation. Brett Slatkin and Brad Fitzpatrick demonstrate what pubsubhubbub is and how it works. For more information, visit pubsubhubbub.googlecode.com From: GoogleDevelopers Views: 23753 112 ratings Time: 03:20 More in Science & Technology

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  • YouTube Direct: Getting Started Guide

    YouTube Direct: Getting Started Guide Jeff Posnick narrates a screencast detailing all aspects of getting started with youtube Direct, from required downloads to configuration to deployment. For even more information about youtube Direct, see code.google.com From: GoogleDevelopers Views: 9685 32 ratings Time: 19:58 More in Science & Technology

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  • Google I/O 2010: Google TV Keynote - Google TV Developers

    Google I/O 2010: Google TV Keynote - Google TV Developers Due to licensing and permissions issues, we are unable to show the full Google TV demonstration from the Day 2 keynote at Google I/O. Until we are able to get these permissions, please check out these clips. For Google I/O session videos, presentations, developer interviews and more, go to: code.google.com/io From: GoogleDevelopers Views: 1 0 ratings Time: 02:07 More in Science & Technology

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  • Google I/O 2010 - Fireside chat w/ Android handset partners

    Google I/O 2010 - Fireside chat w/ Android handset partners Google I/O 2010 - Fireside chat with Android handset manufacturers Fireside Chats, Android Lori Fraleigh (Motorola), Bill Maggs (Sony Ericsson), Joon Kang (LGE), Ciaran Rochford (Samsung), Eric Chu (Google; moderator) Come join us for a fireside chat with the top Android handset manufacturers. Hear about the types of devices being planned for 2010 and get your device-specific questions answered. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 8 0 ratings Time: 01:02:57 More in Science & Technology

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  • Google I/O 2010 - Fireside chat with the Android team

    Google I/O 2010 - Fireside chat with the Android team Google I/O 2010 - Fireside chat with the Android team Fireside Chats The Android team with Chris DiBona moderating Pull up a chair and join the Android team at Google for a fireside chat. It's your opportunity to ask us about the platform and to tell us where you'd like to see it go in the future. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 303 1 ratings Time: 01:01:39 More in Science & Technology

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  • Google I/O 2012 - Building Web Applications using Google APIs and JavaScript Client for Google APIs

    Google I/O 2012 - Building Web Applications using Google APIs and JavaScript Client for Google APIs Brendan O'Brien In this session, you will learn how to use the features of the Google API client for JavaScript to build rich web applications. Some of the features we will demonstrate include authentication and CORS. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 866 8 ratings Time: 52:00 More in Science & Technology

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  • A conversation with Paul Rademacher and Mano Marks, Google Maps API Office Hours

    A conversation with Paul Rademacher and Mano Marks, Google Maps API Office Hours This is a conversation between Paul Rademacher and Mano Marks on April 24th, 2012. Paul created the first Google Maps Mashup, housingmaps.com, and discusses his latest project, Stratocam, which allows users to find and display beautiful satellite and aerial imagery with the Google Maps API. From: GoogleDevelopers Views: 1199 11 ratings Time: 40:08 More in Science & Technology

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  • App Script Office Hours - August 16, 2012

    App Script Office Hours - August 16, 2012 Eric and Jan from the Apps Script Developer Relations team host another weekly edition of office hours, a chance for developers to ask their questions live or just chat about new features. This week they also highlighted some apps in the Chrome Web Store built on Apps Script: DriveEye, Gmail Meter, Gmail Print All for Chrome, and Drive Forms. To find out when the next office hours are scheduled visit: developers.google.com From: GoogleDevelopers Views: 873 24 ratings Time: 31:31 More in Science & Technology

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  • App Engine & Cloud SQL

    App Engine & Cloud SQL We'll quickly review Cloud SQL and chat with members of the Cloud SQL team about the newest features / tips & tricks. There will also be a Q&A session so please enter any questions you might have for the team in the moderator list for this session at www.google.com From: GoogleDevelopers Views: 1501 26 ratings Time: 36:26 More in Science & Technology

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  • Google+ Platform Office Hours for March 7th 2012: REST API Overview

    Google+ Platform Office Hours for March 7th 2012: REST API Overview We hold weekly Google+ Platform Office Hours using Hangouts On Air most Wednesdays from 11:30 am until 12:15 pm PST. This week we took a step back and looked at the Google+ platform's REST APIs. We explain what they're capable of and show you how to get started using them. Discuss this video on Google+: goo.gl Learn more about our Office Hours: developers.google.com From: GoogleDevelopers Views: 3299 44 ratings Time: 31:45 More in Science & Technology

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  • What is PubSubHubbub?

    What is PubSubHubbub? An overview of pubsubhubbub, a simple, open, web-hook-based pubsub protocol & open source reference implementation. Brett Slatkin and Brad Fitzpatrick demonstrate what pubsubhubbub is and how it works. For more information, visit pubsubhubbub.googlecode.com From: GoogleDevelopers Views: 23753 112 ratings Time: 03:20 More in Science & Technology

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  • Google I/O 2012 - Storing Data in Google Apps Script

    Google I/O 2012 - Storing Data in Google Apps Script Drew Csillag This session covers the different ways in which developers can store data when using Google Script. We'll break things down by use case, and then show examples of how to use the different options: spreadsheet, Script/User Properties, JDBC connector, and distribution. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 24 1 ratings Time: 41:48 More in Science & Technology

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  • Google Chrome Extensions: UI Design

    Google Chrome Extensions: UI Design Erik Kay, an engineer at Google, provides more information about the UI of Google Chrome's extension system. For more information visit code.google.com/chrome/extensions. From: GoogleDevelopers Views: 10120 57 ratings Time: 03:49 More in Science & Technology

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  • The Google Prediction API

    The Google Prediction API The Prediction API enables you to make your smart apps even smarter. The API accesses Google's machine learning algorithms to analyze your historic data and predict likely future outcomes. Using the Google Prediction API, you can build the following intelligence into your applications. Read more at code.google.com From: GoogleDevelopers Views: 15834 113 ratings Time: 01:37 More in Science & Technology

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  • Google Chrome Extensions: Identity, Signing and Auto Update

    Google Chrome Extensions: Identity, Signing and Auto Update Antony Sargent, a software engineer at Google discusses topics related to ids, packaging and distribution of extensions in the Google Chrome Extension system. To get more information, visit code.google.com/chrome/extensions From: GoogleDevelopers Views: 27337 54 ratings Time: 04:08 More in Science & Technology

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  • Google I/O 2012 - The Sensitive Side of Android

    Google I/O 2012 - The Sensitive Side of Android Tony Chan, Ankur Kotwal , Tim Bray, Tony Chan Android has a sensitive side. In this session, we will call out all the Android sensors: accelerometer, gyroscope, light, and more. We'll cover best practices for handling sensor data, with special focus on balancing battery life and usability. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 2157 35 ratings Time: 56:06 More in Science & Technology

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  • Google Python Class Day 2 Part 1

    Google Python Class Day 2 Part 1 Google Python Class Day 2 Part 1: Regular Expressions. By Nick Parlante. Support materials and exercises: code.google.com From: GoogleDevelopers Views: 18 0 ratings Time: 42:00 More in Science & Technology

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