USB: VID=000 & PID=000

[fluiss]

Hi all,

     When booting up a custom made board with iMX280 in USB Boot Mode is suposed that -when connected to a PC- Windows should recognize the board as a USB Device. The thing is that a pop-up message appears saying 'Unknown Device'. After using a USB Sniffer I noticed that the micro is sending the Vendor ID and the Product ID as zeros, whey it should be sending VID=0x15A2 and PID=0x004F.

     I also checked the D+ and D- signal with a Logic Analyzer and both are correct.

     Why the micro is sending the VID and PID as zeros??

     Thank you very much in advance. BR,

     Fernando

[jimmychan]

I assume your board is similar the i.MX28EVK design.

Attached is the BSP user guide. You can try the steps mentioned in " 5.2.1 USB Boot".

[fluiss]

Hi Jimmy,

  Yes, my board is similar the EVK. I have read that guide, and (I think) all that I can read about an i.MX microcontroller.

  When connected to Windows or Linux both see a 'Hub' (bDeviceClass=9), when they should see a 'HID Device' (bDeviceClass=3).

   On the other hand, I can't enter in Recovery Mode. I press the key connected to the PSWITCH pin but nothing happens.

    I assume the micro is not entering in the USB Boot Mode properly but I don't understand why because I have the resistors to ground (LCD_0/3) and the LCD_RS pin to VDDIO.

  Many thx. BR.

[YixingKong]

Fernando

This discussion is closed since no activity. If you still need help, please feel free to reply with an update to this discussion, or create another discussion.

Thanks,

Yixing

[YixingKong]

Fernando

Is your issue resolved? If yes, we will close your request.

Thanks,

Yixing