The function usbh_hid_data_in retrieves the data sent by an
USB HID device. The argument ctrl is the index of USB Host
Controller. The argument dev_idx is the index of device
instance. The argument ptr_data is a pointer where data will
be returned.
The usbh_hid_data_in function is part of the RL-USB Host
Class Driver software layer.
Return Value
A integer value indicating number of received data bytes.
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