protocol/lufa/LUFA-120730/LUFA/Drivers/USB/Core/USBTask.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #define  __INCLUDE_FROM_USBTASK_C
  32 #define  __INCLUDE_FROM_USB_DRIVER
  33 #include "USBTask.h"
  34
  35 volatile bool        USB_IsInitialized;
  36 USB_Request_Header_t USB_ControlRequest;
  37
  38 #if defined(USB_CAN_BE_HOST) && !defined(HOST_STATE_AS_GPIOR)
  39 volatile uint8_t     USB_HostState;
  40 #endif
  41
  42 #if defined(USB_CAN_BE_DEVICE) && !defined(DEVICE_STATE_AS_GPIOR)
  43 volatile uint8_t     USB_DeviceState;
  44 #endif
  45
  46 void USB_USBTask(void)
  47 {
  48         #if defined(USB_HOST_ONLY)
  49                 USB_HostTask();
  50         #elif defined(USB_DEVICE_ONLY)
  51                 USB_DeviceTask();
  52         #else
  53                 if (USB_CurrentMode == USB_MODE_Device)
  54                   USB_DeviceTask();
  55                 #if defined(USB_CAN_BE_HOST)
  56                 else if (USB_CurrentMode == USB_MODE_Host)
  57                   USB_HostTask();
  58                 #endif
  59         #endif
  60 }
  61
  62 #if defined(USB_CAN_BE_DEVICE)
  63 static void USB_DeviceTask(void)
  64 {
  65         if (USB_DeviceState != DEVICE_STATE_Unattached)
  66         {
  67                 uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();
  68
  69                 Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
  70
  71                 if (Endpoint_IsSETUPReceived())
  72                   USB_Device_ProcessControlRequest();
  73
  74                 Endpoint_SelectEndpoint(PrevEndpoint);
  75         }
  76 }
  77 #endif
  78
  79 #if defined(USB_CAN_BE_HOST)
  80 static void USB_HostTask(void)
  81 {
  82         uint8_t PrevPipe = Pipe_GetCurrentPipe();
  83
  84         Pipe_SelectPipe(PIPE_CONTROLPIPE);
  85
  86         USB_Host_ProcessNextHostState();
  87
  88         Pipe_SelectPipe(PrevPipe);
  89 }
  90 #endif
  91