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DM8168 USB Issue

Shareef
Expert 1985 points

Dear All,

We are using DM8168 silicon revision A chip in our custom board. We are facing USB issue where the USB VBUS supply is reading 0V. When we probe the DRVVBUS signal is reading 0V (LOW) always. It momentarily goes HIGH when the kernel is coming up, but stays low after that.

Could you please help us in resolving this issue? 

Regards,

Khader Shareef

  • 0
    Expert 1985 points

    Hello All,

    We have been able to resolve the USB VBUS issue. Now the USB VBUS supply is present and our USB interface is same as that of DM8168 EVM but still I am not able to mount my USB Flash pendrive. I am getting a invalid media value (0xb9) error message when I connect my Pendrive. Could anybody please help me in resolving this issue. The kernel prints are as shown below:

    sd 2:0:0:0: Attached scsi generic sg0 type 0
    sd 2:0:0:0: [sda] 3915776 512-byte logical blocks: (2.00 GB/1.86 GiB)
    sd 2:0:0:0: [sda] Write Protect is off
    sd 2:0:0:0: [sda] Assuming drive cache: write through
    sd 2:0:0:0: [sda] Assuming drive cache: write through
     sda: sda1
    sd 2:0:0:0: [sda] Assuming drive cache: write through
    sd 2:0:0:0: [sda] Attached SCSI removable disk
    FAT: invalid media value (0xb9)
    VFS: Can't find a valid FAT filesystem on dev sda.

    Regards,

    Khader Shareef

  • 0 in reply to Shareef
    TI__Expert 7885 points

    Khader

    It seems USB device has been enumerated properly but there could be issue with FS present on the device, FS would have corrupted. Use fdisk to format the device again for FAT/EXT2 file ssytem.

    Regards

    Ravi B