[Help] reading USB port

[syeda amna]

hi
i want to read USB port and want to write code in C language. Can anyone guide me or give me the code in C language. plz suggest me any tutorial or refrence.
thanks

 

[samba007]

You cannot directly read from USB like you read from a serial port unless you are using an adapter.

USB uses different types of interfaces.
So you first need to enumerate the interfaces and depending on the type of interfaces, call it differently.

If the USB device uses interrupt interfaces, you can open and read it directly using CreateFile/ReadFile as the drivers are already loaded. If the interface is bulk or isochronous or control you must have/write a driver.

 

[John Connor]

Try libusb-win32 it simplifies the code design...



libusb-win32

 

[syeda amna]

You cannot directly read from USB like you read from a serial port unless you are using an adapter.

USB uses different types of interfaces.
So you first need to enumerate the interfaces and depending on the type of interfaces, call it differently.

If the USB device uses interrupt interfaces, you can open and read it directly using CreateFile/ReadFile as the drivers are already loaded. If the interface is bulk or isochronous or control you must have/write a driver.

thank you very much. very helpful fir me. can you give any tutorial or refrence material??
for writing the driver what will be the requirements?

 

[ckshivaram]

https://www.delcomproducts.com/downloads/USBPRGMNL.pdf

Beyond Logic

 

[syeda amna]

please guide me. can anyone give me the code for usb interrupt interface.

 

[ckshivaram]

what code is required????? which controller or which OS you plan to use.. i my earlier post i have given a pdf file about it

 

[syeda amna]

what code is required????? which controller or which OS you plan to use.. i my earlier post i have given a pdf file about it

i want code in C language for windows.

 

[ckshivaram]

did you anytime check my link in the thread.

https://www.delcomproducts.com/downloads/USBPRGMNL.pdf . i am reposting it

you have the code in this document... Assuming that you know about USB ,, i expect you wont get any simple program to nderstand it because ,, it not like the simple drivers that we write for controllers and its interfaces....

its high level programming concept which may require some expertise to understand.... it took 7 years for me to understand and write code for digital cameras and USB HID's..