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Forum Post: AM335x USB HUB can not be detecetd

Hi Ti

We use psp kernel 3.2, and the config is tisdk_am335x-evm_defconfig. usb hub 2-0 cant be detected.

We hope the the message "hub 2-0:1.0: USB hub found" appeared

I check we follow this shema:

   Typical connections for a USB host with USB hub:

  • USBx_DP and USBx_DM are connected directly to the USB hub upstream port. The hub then distributes these signals to the downstream ports as needed.
  • USBx_CE is typically not used and can be left unconnected
  • USDx_ID should be grounded to enable host mode.
  • USBx_DRVVBUS should be connected to the enable of the 5V VBUS power source.
  • USBx_VBUS should be connected to the output of the 5V VBUS power source. It is also connected to the VBUS detect on the hub, which then allows the hub to selectively enable/disable typically through a power switch to each downstream port.

USB0_DRVVBUS have signal and USB0_VBUS have 5V, but usb can not work...

(Please visit the site to view this file)

BestRegards

Bernie


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