How to send Clear Port Feature to TUSB2046 from windows without changing the default windows driver

Michael Coutlakis

Hi there,

According to the TUSB2046 Errata it may sometimes be necessary to send a ClearPortFeature as per chapter 11 of the usb specification. Could you please give me some guidance on how to do this from a windows system. Ideally I would want to do this without installing a different driver for the hub.

Basically what functions could I use from a C++ program.

over 9 years ago

0 Elias Villegas M. over 9 years ago

TI__Guru* 76130 points

Hello,
Unfortunately we don't have example code, there are some tools available that can send specific commands (EHSETT), the probability of this issue to happen is very low, you could also workaround this by sending a GRST# to the hub.
Regards

0 Michael Coutlakis over 9 years ago in reply to Elias Villegas M.

Prodigy 50 points

Hi Thanks very much for the reply.
I downloaded the EHSETT. Sending a RESET from the EHSETT to the hub or downstream device fixes my problem.

Do you have any idea how the EHSETT sends the RESET (so I could use this functionality from a program?). Sending a reset using libusb, restarting using devcon, ejecting using windows do not have the same effect as the RESET from EHSETT.

0 Elias Villegas M. over 9 years ago in reply to Michael Coutlakis

TI__Guru* 76130 points

I don't, you may want to contact the usb-if, they made that tool.
www.usb.org

Regards

Interface

Interface forum

How to send Clear Port Feature to TUSB2046 from windows without changing the default windows driver