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Note for libusbd_arm-none-eabi.a usage:
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Make sure the following files are linked to the user project.
    • lib\libusbd_arm-none-eabi.a
    • cfg\phUsbd_Cfg.c

Default values for the interface(USB_APP_IF_NUM) and end point numbers(USB_APP_EP_NUM) are 3 and 6, respectively.
User can configure these values based on application requirement.
Maximum allowed values: USB_APP_IF_NUM --> 3
                        USB_APP_EP_NUM --> 6
