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AM6548: USB0 Device enumeration issue

Sushruta Shetty
Intellectual 655 points
Part Number: AM6548


Hi Team,

We have designed a board with AM6548 Processor. We are in board bring up stage.

Currently, we are facing an issue with AM6548 USB0 Interface.

USB0 is working fine in Host Mode. However in device mode we are facing an issue with device enumeration.

We have followed EVM as reference for schematic design.

Kindly share your thoughts on this.

Thank you.

Regards,

Sushruta

  • 0
    TI__Guru**** 393215 points

    Please post what software you are using, and which version.

  • 0 in reply to Biser Gatchev-XID
    Intellectual 655 points

    We are using RTOS and below is the file that we are referring to.

    ti-processor-sdk-rtos-am65xx-evm-05.03.00.07-Linux-x86-Install.bin

    Regards,

    Sushruta

  • 0 in reply to Sushruta Shetty
    TI__Guru* 95265 points

    Hi,

    I thought you must be quite familiar with the IDK or GP EVM schematics. And you used the USB_DevMsc_TestApp or the baremetal one? Build by CCS project or gmake? Is the USB instance set to 0? Is USB 3.0 or 2.0 for this test? Have you attached a USB trace analyzer to see what LTSSM state it stuck?

    Regards, Eric  

  • 0 in reply to lding
    TI__Guru* 95265 points

    Hi,

    On the EVM we tested USB port 0 in host mode and USB port 1 in device mode. It seems you need to enable USB Serdes when you using USB port 0 as the device mode.

    So, 

    1. in ti\drv\usb\soc\am65xx\usb_wrapper.c, function void usbClockCfg(uint32_t portNumber) 

    if ((portNumber == 0) && /* only port #0 supports SS */
    //(usbConfig->usb30Enabled == TRUE) /* user asks for USB3.0 */) ======> comment out this line so always enable USB port 0 serdes clock
    {
    if (usbClockSSCfg() != 0)
    {
    debug_printf("Error when enabling Super Speed\n");
    }
    }

    2. ti\drv\usb\example\usb_dev\msc\dev_msc.c, 

    #define USB_DEV_INSTANCE                     1 ========> change this to 0

    Then, rebuild USB library and application, try and let us know if it works.

    Regards, Eric

  • 0 in reply to lding
    Intellectual 655 points

    Thank you for your support.

    This resolved our issue.

    Regards,

    Sushruta