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                 Endpoint_WaitUntilReady();
 130         }
 131
 132         Endpoint_ClearIN();
 133 }
 134
 135 void CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, char* const Data, const uint16_t Length)
 136 {
 137         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 138           return;
 139
 140         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 141         Endpoint_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
 142 }
 143
 144 void CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Data)
 145 {
 146         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 147           return;
 148
 149         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
 150
 151         if (!(Endpoint_IsReadWriteAllowed()))
 152         {
 153                 Endpoint_ClearIN();
 154                 Endpoint_WaitUntilReady();
 155         }
 156
 157         Endpoint_Write_Byte(Data);
 158 }
 159
 160 uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 161 {
 162         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 163
 164         if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))
 165           Endpoint_ClearOUT();
 166
 167         return Endpoint_BytesInEndpoint();
 168 }
 169
 170 uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
 171 {
 172         if (USB_DeviceState != DEVICE_STATE_Configured)
 173           return 0;
 174
 175         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 176
 177         uint8_t DataByte = Endpoint_Read_Byte();
 178
 179         if (!(Endpoint_BytesInEndpoint()))
 180           Endpoint_ClearOUT();
 181
 182         return DataByte;
 183 }
 184
 185 void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 186 {
 187         if (USB_DeviceState != DEVICE_STATE_Configured)
 188           return;
 189
 190         Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber);
 191
 192         USB_Request_Header_t Notification = (USB_Request_Header_t)
 193                 {
 194                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
 195                         .bRequest      = NOTIF_SerialState,
 196                         .wValue        = 0,
 197                         .wIndex        = 0,
 198                         .wLength       = sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
 199                 };
 200
 201         Endpoint_Write_Stream_LE(&Notification, sizeof(Notification), NO_STREAM_CALLBACK);
 202         Endpoint_Write_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
 203                                  sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
 204                                  NO_STREAM_CALLBACK);
 205         Endpoint_ClearIN();
 206 }
 207
 208 #endif