LUFA/Drivers/USB/HighLevel/USBTask.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 #include "USBMode.h"
  32
  33 #define  INCLUDE_FROM_USBTASK_C
  34 #include "USBTask.h"
  35
  36 volatile bool        USB_IsSuspended;
  37 volatile bool        USB_IsConnected;
  38 volatile bool        USB_IsInitialized;
  39 USB_Request_Header_t USB_ControlRequest;
  40
  41 #if defined(USB_CAN_BE_HOST)
  42 volatile uint8_t   USB_HostState;
  43 #endif
  44
  45 void USB_USBTask(void)
  46 {
  47         #if defined(USB_HOST_ONLY)
  48                 USB_HostTask();
  49         #elif defined(USB_DEVICE_ONLY)
  50                 USB_DeviceTask();
  51         #else
  52                 if (USB_CurrentMode == USB_MODE_DEVICE)
  53                   USB_DeviceTask();
  54                 else if (USB_CurrentMode == USB_MODE_HOST)
  55                   USB_HostTask();
  56         #endif
  57 }
  58
  59 #if defined(USB_CAN_BE_DEVICE)
  60 static void USB_DeviceTask(void)
  61 {
  62         if (USB_IsConnected)
  63         {
  64                 uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();
  65
  66                 Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
  67
  68                 if (Endpoint_IsSETUPReceived())
  69                 {
  70                         ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
  71                         {
  72                                 USB_Device_ProcessControlPacket();
  73                         }
  74                 }
  75
  76                 Endpoint_SelectEndpoint(PrevEndpoint);
  77         }
  78 }
  79 #endif
  80
  81 #if defined(USB_CAN_BE_HOST)
  82 static void USB_HostTask(void)
  83 {
  84         uint8_t PrevPipe = Pipe_GetCurrentPipe();
  85
  86         Pipe_SelectPipe(PIPE_CONTROLPIPE);
  87
  88         USB_Host_ProcessNextHostState();
  89
  90         Pipe_SelectPipe(PrevPipe);
  91 }
  92 #endif