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 uint8_t 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 ENDPOINT_READYWAIT_NoError;
 128
 129         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 130         return Endpoint_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
 131 }
 132
 133 uint8_t 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 ENDPOINT_READYWAIT_NoError;
 137
 138         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 139
 140         if (!(Endpoint_IsReadWriteAllowed()))
 141         {
 142                 uint8_t ErrorCode;
 143
 144                 Endpoint_ClearIN();
 145
 146                 if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
 147                   return ErrorCode;
 148         }
 149
 150         Endpoint_Write_Byte(Data);
 151         return ENDPOINT_READYWAIT_NoError;
 152 }
 153
 154 uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 155 {
 156         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 157           return ENDPOINT_READYWAIT_NoError;
 158
 159         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 160
 161         if (Endpoint_BytesInEndpoint())
 162         {
 163                 uint8_t ErrorCode;
 164
 165                 Endpoint_ClearIN();
 166
 167                 if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
 168                   return ErrorCode;
 169         }
 170
 171         Endpoint_ClearIN();
 172         return Endpoint_WaitUntilReady();
 173 }
 174
 175 uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 176 {
 177         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 178           return 0;
 179
 180         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 181
 182         if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))
 183           Endpoint_ClearOUT();
 184
 185         return Endpoint_BytesInEndpoint();
 186 }
 187
 188 uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
 189 {
 190         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 191           return 0;
 192
 193         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 194
 195         uint8_t DataByte = Endpoint_Read_Byte();
 196
 197         if (!(Endpoint_BytesInEndpoint()))
 198           Endpoint_ClearOUT();
 199
 200         return DataByte;
 201 }
 202
 203 void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 204 {
 205         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 206           return;
 207
 208         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber);
 209
 210         USB_Request_Header_t Notification = (USB_Request_Header_t)
 211                 {
 212                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
 213                         .bRequest      = NOTIF_SerialState,
 214                         .wValue        = 0,
 215                         .wIndex        = 0,
 216                         .wLength       = sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
 217                 };
 218
 219         Endpoint_Write_Stream_LE(&Notification, sizeof(Notification), NO_STREAM_CALLBACK);
 220         Endpoint_Write_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
 221                                  sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
 222                                  NO_STREAM_CALLBACK);
 223         Endpoint_ClearIN();
 224 }
 225
 226 #endif