How to read/write data from/to USB port ?

Cedric Moonen

You have to open (using CreateFile) the driver that is associated with the device. Then you can use ReadFile and WriteFile to read or write data to the driver. But it depends also of the kind of device you are using. Can you provide more information ?

Cédric Moonen Software developer
Charting control [v1.2 - Updated]

GuyM

Well, that depends on the driver for your specific device. If your device's USB driver acts like a serial-port then you need the ReadFile() and WriteFile() (just like in a serial port) Otherwise, you'll have to refer to the documentation/spec of your device ...

ashokbngr

can u please send sample code for this. Thanks In Advance Ashok.

ashokbngr

I am very new to this USB communication. can u please send sample code for this or any links???????? Thanks In Advance Ashok.

Cedric Moonen

ashokbngr wrote:

can u please send sample code for this or any links????????

No, because I don't have any information to give a piece of code. What device are you trying to communicate with ?

Cédric Moonen Software developer
Charting control [v1.2 - Updated]

GuyM

Again, assuming your device's USB driver acts like a regular serial-port : http://www.codeproject.com/system/chaiyasit_t.asp[^] Otherwise ... :confused:

David Crow

Cedric Moonen wrote:

What device are you trying to communicate with ?

Come on, Cedric, it's a universal serial device!

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Mark Salsbery

Cedric Moonen wrote:

What device are you trying to communicate with ?

This[^] device!

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Hamid Taebi

But which Blue or White!

WhiteSky

Rajesh R Subramanian

LOL. 5.

Mark Salsbery

:doh: Still not enough info! Or yellow...

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder