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_ProcessControlPacket(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.ControlLineState = USB_ControlRequest.wValue;
  78
  79                                 EVENT_CDC_Device_ControLineStateChanged(CDCInterfaceInfo);
  80
  81                                 while (!(Endpoint_IsINReady()));
  82                                 Endpoint_ClearIN();
  83                         }
  84
  85                         break;
  86         }
  87 }
  88
  89 bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
  90 {
  91         if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber, EP_TYPE_BULK,
  92                                                                  ENDPOINT_DIR_IN, CDCInterfaceInfo->Config.DataINEndpointSize,
  93                                                                  ENDPOINT_BANK_SINGLE)))
  94         {
  95                 return false;
  96         }
  97
  98         if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber, EP_TYPE_BULK,
  99                                          ENDPOINT_DIR_OUT, CDCInterfaceInfo->Config.DataOUTEndpointSize,
 100                                          ENDPOINT_BANK_SINGLE)))
 101         {
 102                 return false;
 103         }
 104
 105         if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber, EP_TYPE_INTERRUPT,
 106                                          ENDPOINT_DIR_IN, CDCInterfaceInfo->Config.NotificationEndpointSize,
 107                                          ENDPOINT_BANK_SINGLE)))
 108         {
 109                 return false;
 110         }
 111
 112         return true;
 113 }
 114
 115 void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
 116 {
 117         if (!(USB_IsConnected))
 118           return;
 119
 120         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 121
 122         if (!(Endpoint_BytesInEndpoint()))
 123           return;
 124
 125         if (!(Endpoint_IsReadWriteAllowed()))
 126         {
 127                 Endpoint_ClearIN();
 128                 while (!(Endpoint_IsReadWriteAllowed()));
 129         }
 130
 131         Endpoint_ClearIN();
 132 }
 133
 134 void CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, char* Data, uint16_t Length)
 135 {
 136         if (!(USB_IsConnected))
 137           return;
 138
 139         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 140         Endpoint_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
 141 }
 142
 143 void CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, uint8_t Data)
 144 {
 145         if (!(USB_IsConnected))
 146           return;
 147
 148         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 149
 150         if (!(Endpoint_IsReadWriteAllowed()))
 151         {
 152                 Endpoint_ClearIN();
 153                 while (!(Endpoint_IsReadWriteAllowed()));
 154         }
 155
 156         Endpoint_Write_Byte(Data);
 157 }
 158
 159 uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
 160 {
 161         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 162
 163         return Endpoint_BytesInEndpoint();
 164 }
 165
 166 uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
 167 {
 168         if (!(USB_IsConnected))
 169           return 0;
 170
 171         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 172
 173         uint8_t DataByte = Endpoint_Read_Byte();
 174
 175         if (!(Endpoint_BytesInEndpoint()))
 176           Endpoint_ClearOUT();
 177
 178         return DataByte;
 179 }
 180
 181 void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, uint16_t LineStateMask)
 182 {
 183         if (!(USB_IsConnected))
 184           return;
 185
 186         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber);
 187
 188         USB_Request_Header_t Notification = (USB_Request_Header_t)
 189                 {
 190                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
 191                         .bRequest      = NOTIF_SerialState,
 192                         .wValue        = 0,
 193                         .wIndex        = 0,
 194                         .wLength       = sizeof(uint16_t),
 195                 };
 196
 197         Endpoint_Write_Stream_LE(&Notification, sizeof(Notification), NO_STREAM_CALLBACK);
 198         Endpoint_Write_Stream_LE(&LineStateMask, sizeof(LineStateMask), NO_STREAM_CALLBACK);
 199         Endpoint_ClearIN();
 200 }
 201
 202 #endif