USB for Qt Application

[dheeraj]

Hi every one. I am using Qt to develop my application. I need to communicate with a remote system and acquire data on USB cable. I found QExtserialport but there is nothing about USB in it. Is it possible to use USB communication in my application. I searched a lot on internet about USB with Qt but din find any.


Thank You

[marcel]

No support for that in Qt. Depending the platform used, you can either use a library or directly the OS API.
On Win you can dig in the win ddk, or use http://libusb-win32.sourceforge.net/.
libusb is available for linux too.

[dheeraj]

Hi marcel thankx a lot for the reply. It helped me. I downloaded the libusb-0.1.12.tar.gz file. Hey can you please tell me how i should use this library in the application i am going to make. How do i connect this to my Application. !! This is the first time i am doing something like this so i don't have any idea on how to use it. I am using Window's Xp ,Qt4.3.3 with VS2005.net


Thank You

[dheeraj]

Hey i am sorry .i downloaded LibUSB-Win32 file now. The previous one libusb-0.1.12.tar.gz which i did was for Linux i realized it only later.

[AlphaWolfXV]

Have you had any chance to use the libusb-win32? I have downloaded it and would also like to use it for a simple HID application. Please advise if you had any success with it so far. I am running Windows Vista Business (32bit) with QT4.5.0 with QtCreator 1.0.0.
Thanks!

[arunpk]

hi friends
I am developing qt application for usb Relay board through qt application only i need to control all the 8 relay, but the problem is i am understanding how to approach it. if you guys have any idea regarding these please let me know, and send example application as per these requirment concern.

[ChrisW67]

Here are some ideas:

• Determine how your relays are accessed by reading the documentation that comes with them or their controller board.
• Choose a library or programming interface to access them (if one is not provided with the devices). This will involve some research on your part but this thread already contains viable methods.
• Write your code

This is not a Qt problem, there is no Qt support for accessing USB devices, and you are very unlikely to have someone write your code for you (even with a less vague specification). If you come across a Qt related question while doing this feel free to come back, but please refrain from resurrecting four-year-old threads to post vague "me too" questions.

[arunpk]

Thanx Chris...... I have idea about how am going to access...... From thsi forum i got USB Example application...... Now am trying with that application to connect my relay board..... i have given the exact VID & PID but still its not detecting the board..... Now i need clarification regarding this.... Hope you can do..... ...