LUFA/Drivers/USB/Core/XMEGA/Endpoint_XMEGA.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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_USB_DRIVER
  32 #include "../USBMode.h"
  33
  34 #if defined(USB_CAN_BE_DEVICE)
  35
  36 #include "../Endpoint.h"
  37
  38 #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
  39 uint8_t USB_Device_ControlEndpointSize = ENDPOINT_CONTROLEP_DEFAULT_SIZE;
  40 #endif
  41
  42 volatile uint8_t   Endpoint_SelectedEndpoint;
  43 volatile USB_EP_t* Endpoint_SelectedEndpointHandle;
  44
  45 void Endpoint_ClearEndpoints(void)
  46 {
  47         for (uint8_t EPNum = 0; EPNum < (ENDPOINT_TOTAL_ENDPOINTS * 2); EPNum++)
  48           ((USB_EP_t*)&USB_EndpointTable)[EPNum].CTRL = 0;
  49 }
  50
  51 void Endpoint_ClearStatusStage(void)
  52 {
  53         while (!(Endpoint_IsOUTReceived()))
  54         {
  55                 if (USB_DeviceState == DEVICE_STATE_Unattached)
  56                   return;
  57         }
  58
  59         Endpoint_ClearOUT();
  60 }
  61
  62 #if !defined(CONTROL_ONLY_DEVICE)
  63 uint8_t Endpoint_WaitUntilReady(void)
  64 {
  65         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
  66         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
  67         #else
  68         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
  69         #endif
  70
  71         uint16_t PreviousFrameNumber = USB_Device_GetFrameNumber();
  72
  73         for (;;)
  74         {
  75                 if (Endpoint_IsOUTReceived())
  76                   return ENDPOINT_READYWAIT_NoError;
  77
  78                 uint8_t USB_DeviceState_LCL = USB_DeviceState;
  79
  80                 if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
  81                   return ENDPOINT_READYWAIT_DeviceDisconnected;
  82                 else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
  83                   return ENDPOINT_READYWAIT_BusSuspended;
  84                 else if (Endpoint_IsStalled())
  85                   return ENDPOINT_READYWAIT_EndpointStalled;
  86
  87                 uint16_t CurrentFrameNumber = USB_Device_GetFrameNumber();
  88
  89                 if (CurrentFrameNumber != PreviousFrameNumber)
  90                 {
  91                         PreviousFrameNumber = CurrentFrameNumber;
  92
  93                         if (!(TimeoutMSRem--))
  94                           return ENDPOINT_READYWAIT_Timeout;
  95                 }
  96         }
  97 }
  98 #endif
  99
 100 #endif
 101