-               void EVENT_USB_Host_HostError(uint8_t ErrorCode);
-               void EVENT_USB_Host_DeviceEnumerationFailed(uint8_t ErrorCode, uint8_t SubErrorCode);
-
-               void SetupHardware(void);
-
-               void USB_Printer_Host(void);
+               void EVENT_USB_Host_HostError(const uint8_t ErrorCode);
+               void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
+                                                           const uint8_t SubErrorCode);