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)
 119           return;
 120
 121         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 122
 123         if (!(Endpoint_BytesInEndpoint()))
 124           return;
 125
 126         if (!(Endpoint_IsReadWriteAllowed()))
 127         {
 128                 Endpoint_ClearIN();
 129
 130                 while (!(Endpoint_IsReadWriteAllowed()))
 131                 {
 132                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 133                           return;
 134                 }
 135         }
 136
 137         Endpoint_ClearIN();
 138 }
 139
 140 void CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, char* const Data, const uint16_t Length)
 141 {
 142         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 143           return;
 144
 145         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 146         Endpoint_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
 147 }
 148
 149 void CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Data)
 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_IsReadWriteAllowed()))
 157         {
 158                 Endpoint_ClearIN();
 159
 160                 while (!(Endpoint_IsReadWriteAllowed()))
 161                 {
 162                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 163                           return;
 164                 }
 165         }
 166
 167         Endpoint_Write_Byte(Data);
 168 }
 169
 170 uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 171 {
 172         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 173
 174         return Endpoint_BytesInEndpoint();
 175 }
 176
 177 uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
 178 {
 179         if (USB_DeviceState != DEVICE_STATE_Configured)
 180           return 0;
 181
 182         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 183
 184         uint8_t DataByte = Endpoint_Read_Byte();
 185
 186         if (!(Endpoint_BytesInEndpoint()))
 187           Endpoint_ClearOUT();
 188
 189         return DataByte;
 190 }
 191
 192 void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 193 {
 194         if (USB_DeviceState != DEVICE_STATE_Configured)
 195           return;
 196
 197         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber);
 198
 199         USB_Request_Header_t Notification = (USB_Request_Header_t)
 200                 {
 201                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
 202                         .bRequest      = NOTIF_SerialState,
 203                         .wValue        = 0,
 204                         .wIndex        = 0,
 205                         .wLength       = sizeof(uint16_t),
 206                 };
 207
 208         Endpoint_Write_Stream_LE(&Notification, sizeof(Notification), NO_STREAM_CALLBACK);
 209         Endpoint_Write_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost, sizeof(uint8_t), NO_STREAM_CALLBACK);
 210         Endpoint_ClearIN();
 211 }
 212
 213 #endif