IPC@CHIP® RTOS-PPC – API Documentation
This structure represents a device request. Device requests are special packets sent from the host to a device on the default pipe (endpoint 0) with a USB_SPEC_PID_SETUP token. For details please refer to the USB specification.
The device requests described in the USB specification are handled by the USB stack. You only have to use this data structure for class or vendor-protocol-specific requests.