LUFA/Drivers/USB/Class/Device/CDC.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 "../../HighLevel/USBMode.h"
  32 #if defined(USB_CAN_BE_DEVICE)
  33
  34 #define  INCLUDE_FROM_CDC_CLASS_DEVICE_C
  35 #include "CDC.h"
  36
  37 void CDC_Device_Event_Stub(void)
  38 {
  39
  40 }
  41
  42 void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
  43 {
  44         if (!(Endpoint_IsSETUPReceived()))
  45           return;
  46
  47         if (USB_ControlRequest.wIndex != CDCInterfaceInfo->Config.ControlInterfaceNumber)
  48           return;
  49
  50         switch (USB_ControlRequest.bRequest)
  51         {
  52                 case REQ_GetLineEncoding:
  53                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
  54                         {
  55                                 Endpoint_ClearSETUP();
  56                                 Endpoint_Write_Control_Stream_LE(&CDCInterfaceInfo->State.LineEncoding, sizeof(CDCInterfaceInfo->State.LineEncoding));
  57                                 Endpoint_ClearOUT();
  58                         }
  59
  60                         break;
  61                 case REQ_SetLineEncoding:
  62                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  63                         {
  64                                 Endpoint_ClearSETUP();
  65                                 Endpoint_Read_Control_Stream_LE(&CDCInterfaceInfo->State.LineEncoding, sizeof(CDCInterfaceInfo->State.LineEncoding));
  66                                 Endpoint_ClearIN();
  67
  68                                 EVENT_CDC_Device_LineEncodingChanged(CDCInterfaceInfo);
  69                         }
  70
  71                         break;
  72                 case REQ_SetControlLineState:
  73                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  74                         {
  75                                 Endpoint_ClearSETUP();
  76
  77                                 CDCInterfaceInfo->State.ControlLineStates.HostToDevice = USB_ControlRequest.wValue;
  78
  79                                 EVENT_CDC_Device_ControLineStateChanged(CDCInterfaceInfo);
  80
  81                                 Endpoint_ClearStatusStage();
  82                         }
  83
  84                         break;
  85         }
  86 }
  87
  88 bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
  89 {
  90         memset(&CDCInterfaceInfo->State, 0x00, sizeof(CDCInterfaceInfo->State));
  91
  92         if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber, EP_TYPE_BULK,
  93                                                                  ENDPOINT_DIR_IN, CDCInterfaceInfo->Config.DataINEndpointSize,
  94                                                                  ENDPOINT_BANK_SINGLE)))
  95         {
  96                 return false;
  97         }
  98
  99         if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber, EP_TYPE_BULK,
 100                                          ENDPOINT_DIR_OUT, CDCInterfaceInfo->Config.DataOUTEndpointSize,
 101                                          ENDPOINT_BANK_SINGLE)))
 102         {
 103                 return false;
 104         }
 105
 106         if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber, EP_TYPE_INTERRUPT,
 107                                          ENDPOINT_DIR_IN, CDCInterfaceInfo->Config.NotificationEndpointSize,
 108                                          ENDPOINT_BANK_SINGLE)))
 109         {
 110                 return false;
 111         }
 112
 113         return true;
 114 }
 115
 116 void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
 117 {
 118         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 119           return;
 120
 121         CDC_Device_Flush(CDCInterfaceInfo);
 122 }
 123
 124 void CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, char* const Data, const uint16_t Length)
 125 {
 126         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 127           return;
 128
 129         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 130         Endpoint_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
 131 }
 132
 133 void CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Data)
 134 {
 135         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 136           return;
 137
 138         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 139
 140         if (!(Endpoint_IsReadWriteAllowed()))
 141         {
 142                 Endpoint_ClearIN();
 143                 Endpoint_WaitUntilReady();
 144         }
 145
 146         Endpoint_Write_Byte(Data);
 147 }
 148
 149 void CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 150 {
 151         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 152           return;
 153
 154         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 155
 156         if (Endpoint_BytesInEndpoint())
 157         {
 158                 Endpoint_ClearIN();
 159                 Endpoint_WaitUntilReady();
 160         }
 161
 162         Endpoint_ClearIN();
 163         Endpoint_WaitUntilReady();
 164 }
 165
 166 uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 167 {
 168         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 169
 170         if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))
 171           Endpoint_ClearOUT();
 172
 173         return Endpoint_BytesInEndpoint();
 174 }
 175
 176 uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
 177 {
 178         if (USB_DeviceState != DEVICE_STATE_Configured)
 179           return 0;
 180
 181         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 182
 183         uint8_t DataByte = Endpoint_Read_Byte();
 184
 185         if (!(Endpoint_BytesInEndpoint()))
 186           Endpoint_ClearOUT();
 187
 188         return DataByte;
 189 }
 190
 191 void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 192 {
 193         if (USB_DeviceState != DEVICE_STATE_Configured)
 194           return;
 195
 196         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber);
 197
 198         USB_Request_Header_t Notification = (USB_Request_Header_t)
 199                 {
 200                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
 201                         .bRequest      = NOTIF_SerialState,
 202                         .wValue        = 0,
 203                         .wIndex        = 0,
 204                         .wLength       = sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
 205                 };
 206
 207         Endpoint_Write_Stream_LE(&Notification, sizeof(Notification), NO_STREAM_CALLBACK);
 208         Endpoint_Write_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
 209                                  sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
 210                                  NO_STREAM_CALLBACK);
 211         Endpoint_ClearIN();
 212 }
 213
 214 #endif