USB CDC Windows drivers

Vishwanatha Manevarthe

Other Parts Discussed in Thread: CONTROLSUITE

Hello,

I am using the CDC lib from controlSuite for F28069U.

After my short research into CDC and its usage on Windows, I found that it is seen as a Virtual COM port and that there is no specific driver required to be loaded.

My question is this:

if I want to access the data over USB (from a CDC device) - without using a terminal software, how do I do?

(I know that it is possible to access COM ports using Windows APIs; I want to avoid this).

Regards,

Vishwanatha

over 13 years ago

0 Vishwanatha Manevarthe over 12 years ago

Expert 1080 points

hello,

anyone out there to help me?

Regards,

Vishwanatha

0 Trey German289 over 12 years ago in reply to Vishwanatha Manevarthe

TI__Mastermind 22025 points

Vishwanatha,

Sorry I hadn't seen your original post. I was on vacation.

You ought to be able to open the COM port in software just as you would a file using f_open. I think instead of a filename you just specify the com port like "COM3". There are a lot of resources out there that describe how to do this, just google "open COM port in C".

Does that answer your question?

Trey

0 Vishwanatha Manevarthe over 12 years ago in reply to Trey German289

Expert 1080 points

Hi Trey,

In DFUProg tool, USB port is accessed from the tool. likewise, is it possible to access the USB port using CDC driver?

(this is all in PC-side)

Regards,

Vishwanatha

0 Trey German289 over 12 years ago in reply to Vishwanatha Manevarthe

TI__Mastermind 22025 points

You are correct the the DFUProg Tool uses DLLs to talk to the device, but in this case the device is a DFU class device.

I took a look at the lmusb/tiusb dll and you ought to be able to access a CDC device using this. A CDC device is just another collection of endpoints so communicating with it is just a matter of transmitting and receiving data through the pipes. I'm not sure the tiusbdll code is specifically setup for a CDC class device but you can definitely access it using winUSB. I would recommend you read up on the information here:

http://msdn.microsoft.com/en-us/library/windows/hardware/ff540196%28v=vs.85%29.aspx

Trey

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USB CDC Windows drivers