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forcing host mode on USB

brad badke
Intellectual 760 points

Is it possible to force the USB into host mode using the function USBHostMode located in usb.c? From the comments in the code it appears this is not possible. See comments below.

* This function changes the mode of the USB controller to host mode. This

* is only valid on microcontrollers that have the host and device

* capabilities and not the OTG capabilities.

  • 0
    TI__Prodigy 515 points

    Hi Brad,

    The current implementation of the USB Stack is as per TRM (spruh73a.pdf) section ‘16.3.1’ and ‘16.3.7’, the controller assumes host mode when DRVVBUS is driven high using EPC register OR DEVCTL bit is set.

    Please refer to the functions 'USBHostPwrEnable' and 'USBOTGSessionRequest' and 'USBHCDInitInternal' functions.

    ‘USBHostMode’ is currently not used in our stack. This is carried over from legacy code and we will remove it.

    Regards

    Sirish