USB double trouble

Hello,

I have a LPC2478 than I can address via 2 data sources: A CDC device and a USB to RS-485 converter. I see something very strange: If I try to use them in parallel, the USB CDC transfers are starting to logged by my sniffer as "canceled" - it is then required to unplug and re-plug the USB cable (of the CDC device). What is happening here?

Thanks in advance!

Parents
  • here is a log of the moment it goes wrong:

    URB        0124    13:28:16.611    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h
    URB     0125    13:28:16.611    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h
    URB     0126-0125       13:28:16.611    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h       Success (Success)
    URB     0127-0124       13:28:16.611    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h       Success (Success)
    URB     0128-0123       13:28:16.611    Bulk or Interrupt Transfer      174     in      01:01:82        82F58B60h       USBPDO-15       usbhub  FC5AD368h       Success (Success)
    URB     0129-0122       13:28:16.611    Bulk or Interrupt Transfer      174     in      01:01:82        8350A030h       00000132        ACPI    FC5AD368h       Success (Success)
    URB     0130    13:28:16.611    Bulk or Interrupt Transfer      4096    in      01:01:82        8350A030h       00000132        ACPI    FC5AD368h
    URB     0131    13:28:16.611    Bulk or Interrupt Transfer      4096    in      01:01:82        82F58B60h       USBPDO-15       usbhub  FC5AD368h
    URB     0132    13:28:16.861    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h
    URB     0133    13:28:16.861    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h
    URB     0134-0133       13:28:16.861    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h       Success (Success)
    URB     0135-0132       13:28:16.861    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h       Success (Success)
    URB     0136    13:28:17.111    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h
    URB     0137    13:28:17.111    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h
    URB     0138-0137       13:28:17.111    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h       Success (Success)
    URB     0139-0136       13:28:17.111    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h       Success (Success)
    URB     0140    13:28:17.361    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h
    URB     0141    13:28:17.361    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h
    URB  0142-0141       13:28:17.611    Bulk or Interrupt Transfer      0       out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h       Cancelled (Canceled)
    URB     0143-0140       13:28:17.611    Bulk or Interrupt Transfer      0       out     01:01:02        8350A030h       00000132        ACPI    FC795660h       Cancelled (Canceled)
    URB     0144    13:28:17.861    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC5ACA38h
    URB     0145    13:28:17.861    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC5ACA38h 
    

Reply
  • here is a log of the moment it goes wrong:

    URB        0124    13:28:16.611    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h
    URB     0125    13:28:16.611    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h
    URB     0126-0125       13:28:16.611    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h       Success (Success)
    URB     0127-0124       13:28:16.611    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h       Success (Success)
    URB     0128-0123       13:28:16.611    Bulk or Interrupt Transfer      174     in      01:01:82        82F58B60h       USBPDO-15       usbhub  FC5AD368h       Success (Success)
    URB     0129-0122       13:28:16.611    Bulk or Interrupt Transfer      174     in      01:01:82        8350A030h       00000132        ACPI    FC5AD368h       Success (Success)
    URB     0130    13:28:16.611    Bulk or Interrupt Transfer      4096    in      01:01:82        8350A030h       00000132        ACPI    FC5AD368h
    URB     0131    13:28:16.611    Bulk or Interrupt Transfer      4096    in      01:01:82        82F58B60h       USBPDO-15       usbhub  FC5AD368h
    URB     0132    13:28:16.861    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h
    URB     0133    13:28:16.861    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h
    URB     0134-0133       13:28:16.861    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h       Success (Success)
    URB     0135-0132       13:28:16.861    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h       Success (Success)
    URB     0136    13:28:17.111    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h
    URB     0137    13:28:17.111    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h
    URB     0138-0137       13:28:17.111    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h       Success (Success)
    URB     0139-0136       13:28:17.111    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h       Success (Success)
    URB     0140    13:28:17.361    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC795660h
    URB     0141    13:28:17.361    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h
    URB  0142-0141       13:28:17.611    Bulk or Interrupt Transfer      0       out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC795660h       Cancelled (Canceled)
    URB     0143-0140       13:28:17.611    Bulk or Interrupt Transfer      0       out     01:01:02        8350A030h       00000132        ACPI    FC795660h       Cancelled (Canceled)
    URB     0144    13:28:17.861    Bulk or Interrupt Transfer      91      out     01:01:02        8350A030h       00000132        ACPI    FC5ACA38h
    URB     0145    13:28:17.861    Bulk or Interrupt Transfer      91      out     01:01:02        82F58B60h       USBPDO-15       usbhub  FC5ACA38h 
    

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