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LUFA/Drivers/USB/Core/USBTask.c 2.38 KB
c9b6255a   dmohamed   ajout de la bibli...
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  /*
               LUFA Library
       Copyright (C) Dean Camera, 2017.
  
    dean [at] fourwalledcubicle [dot] com
             www.lufa-lib.org
  */
  
  /*
    Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  
    Permission to use, copy, modify, distribute, and sell this
    software and its documentation for any purpose is hereby granted
    without fee, provided that the above copyright notice appear in
    all copies and that both that the copyright notice and this
    permission notice and warranty disclaimer appear in supporting
    documentation, and that the name of the author not be used in
    advertising or publicity pertaining to distribution of the
    software without specific, written prior permission.
  
    The author disclaims all warranties with regard to this
    software, including all implied warranties of merchantability
    and fitness.  In no event shall the author be liable for any
    special, indirect or consequential damages or any damages
    whatsoever resulting from loss of use, data or profits, whether
    in an action of contract, negligence or other tortious action,
    arising out of or in connection with the use or performance of
    this software.
  */
  
  #define  __INCLUDE_FROM_USBTASK_C
  #define  __INCLUDE_FROM_USB_DRIVER
  #include "USBTask.h"
  
  volatile bool        USB_IsInitialized;
  USB_Request_Header_t USB_ControlRequest;
  
  #if defined(USB_CAN_BE_HOST) && !defined(HOST_STATE_AS_GPIOR)
  volatile uint8_t     USB_HostState;
  #endif
  
  #if defined(USB_CAN_BE_DEVICE) && !defined(DEVICE_STATE_AS_GPIOR)
  volatile uint8_t     USB_DeviceState;
  #endif
  
  void USB_USBTask(void)
  {
  	#if defined(USB_CAN_BE_BOTH)
  		if (USB_CurrentMode == USB_MODE_Device)
  		  USB_DeviceTask();
  		else if (USB_CurrentMode == USB_MODE_Host)
  		  USB_HostTask();
  	#elif defined(USB_CAN_BE_HOST)
  		USB_HostTask();
  	#elif defined(USB_CAN_BE_DEVICE)
  		USB_DeviceTask();
  	#endif
  }
  
  #if defined(USB_CAN_BE_DEVICE)
  static void USB_DeviceTask(void)
  {
  	if (USB_DeviceState == DEVICE_STATE_Unattached)
  	  return;
  
  	uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();
  
  	Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
  
  	if (Endpoint_IsSETUPReceived())
  	  USB_Device_ProcessControlRequest();
  
  	Endpoint_SelectEndpoint(PrevEndpoint);
  }
  #endif
  
  #if defined(USB_CAN_BE_HOST)
  static void USB_HostTask(void)
  {
  	uint8_t PrevPipe = Pipe_GetCurrentPipe();
  
  	Pipe_SelectPipe(PIPE_CONTROLPIPE);
  
  	USB_Host_ProcessNextHostState();
  
  	Pipe_SelectPipe(PrevPipe);
  }
  #endif