User`s manual

RSK+ RX62N Applications
3.2 USBCore
The USBCore layer handles standard USB requests common to all USB devices during the enumeration stage. This
means that a developer can concentrate on any class or vendor specific implementation. The USBCore requires
initialising with the descriptors specific to the device being implemented. It uses the USBHAL, which it initialises, to
access the particular HW.
The following Standard Requests are handled:
• Get_Status
• Clear_Feature
• Set_Feature
• Get_Descriptor (See below for details.)
• Get_Configuration
• Set_Configuration
• Get_Interface
• Set_Interface
The following Get_Descriptor requests are handled:
 Device
 Configuration
 String
o Language ID (Only a single language ID is supported and this is currently English)
o Manufacturer
o Product
o Serial Number
The USBCDC API consists of a single function called ‘USBCORE_Init’. This initialises the USBCore and the HAL. In
addition to passing device descriptors to this function it also requires call back functions for the following conditions:
 A Setup packet has been received that this layer can’t handle. This enables a higher layer to handle class or vender specific
requests.
 A Control Data Out has completed following a setup packet that is being handled by the layer above.
 The USB cable has been connected or disconnected.
 An unhandled error has occurred.
The HAL module consists of the following files:-
¾ usb_core.c
¾ usb_core.h.
¾ usb_common.h
R20UT0255EG0100 Page 11 of 11
August 26, 2010