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 #define  INCLUDE_FROM_CDC_CLASS_C
  32 #include "CDC.h"
  33
  34 void USB_CDC_Event_Stub(void)
  35 {
  36
  37 }
  38
  39 void USB_CDC_ProcessControlPacket(USB_ClassInfo_CDC_t* CDCInterfaceInfo)
  40 {
  41         if (!(Endpoint_IsSETUPReceived()))
  42           return;
  43
  44         if (USB_ControlRequest.wIndex != CDCInterfaceInfo->ControlInterfaceNumber)
  45           return;
  46
  47         switch (USB_ControlRequest.bRequest)
  48         {
  49                 case REQ_GetLineEncoding:
  50                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
  51                         {
  52                                 Endpoint_ClearSETUP();
  53                                 Endpoint_Write_Control_Stream_LE(&CDCInterfaceInfo->LineEncoding, sizeof(CDCInterfaceInfo->LineEncoding));
  54                                 Endpoint_ClearOUT();
  55                         }
  56
  57                         break;
  58                 case REQ_SetLineEncoding:
  59                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  60                         {
  61                                 Endpoint_ClearSETUP();
  62                                 Endpoint_Read_Control_Stream_LE(&CDCInterfaceInfo->LineEncoding, sizeof(CDCInterfaceInfo->LineEncoding));
  63                                 Endpoint_ClearIN();
  64
  65                                 EVENT_USB_CDC_LineEncodingChanged(CDCInterfaceInfo);
  66                         }
  67
  68                         break;
  69                 case REQ_SetControlLineState:
  70                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  71                         {
  72                                 Endpoint_ClearSETUP();
  73
  74                                 CDCInterfaceInfo->ControlLineState = USB_ControlRequest.wValue;
  75
  76                                 EVENT_USB_CDC_ControLineStateChanged(CDCInterfaceInfo);
  77
  78                                 while (!(Endpoint_IsINReady()));
  79                                 Endpoint_ClearIN();
  80                         }
  81
  82                         break;
  83         }
  84 }
  85
  86 bool USB_CDC_ConfigureEndpoints(USB_ClassInfo_CDC_t* CDCInterfaceInfo)
  87 {
  88         if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->DataINEndpointNumber, EP_TYPE_BULK,
  89                                                                  ENDPOINT_DIR_IN, CDCInterfaceInfo->DataINEndpointSize,
  90                                                                  ENDPOINT_BANK_SINGLE)))
  91         {
  92                 return false;
  93         }
  94
  95         if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->DataOUTEndpointNumber, EP_TYPE_BULK,
  96                                          ENDPOINT_DIR_OUT, CDCInterfaceInfo->DataOUTEndpointSize,
  97                                          ENDPOINT_BANK_SINGLE)))
  98         {
  99                 return false;
 100         }
 101
 102         if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->NotificationEndpointNumber, EP_TYPE_INTERRUPT,
 103                                          ENDPOINT_DIR_IN, CDCInterfaceInfo->NotificationEndpointSize,
 104                                          ENDPOINT_BANK_SINGLE)))
 105         {
 106                 return false;
 107         }
 108
 109         return true;
 110 }
 111
 112 void USB_CDC_USBTask(USB_ClassInfo_CDC_t* CDCInterfaceInfo)
 113 {
 114         if (!(USB_IsConnected))
 115           return;
 116
 117         Endpoint_SelectEndpoint(CDCInterfaceInfo->DataINEndpointNumber);
 118
 119         if (!(Endpoint_BytesInEndpoint()))
 120           return;
 121
 122         if (!(Endpoint_IsReadWriteAllowed()))
 123         {
 124                 Endpoint_ClearIN();
 125                 while (!(Endpoint_IsReadWriteAllowed()));
 126         }
 127
 128         Endpoint_ClearIN();
 129 }
 130
 131 void USB_CDC_SendString(USB_ClassInfo_CDC_t* CDCInterfaceInfo, char* Data, uint16_t Length)
 132 {
 133         if (!(USB_IsConnected))
 134           return;
 135
 136         Endpoint_SelectEndpoint(CDCInterfaceInfo->DataINEndpointNumber);
 137         Endpoint_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
 138 }
 139
 140 void USB_CDC_SendByte(USB_ClassInfo_CDC_t* CDCInterfaceInfo, uint8_t Data)
 141 {
 142         if (!(USB_IsConnected))
 143           return;
 144
 145         Endpoint_SelectEndpoint(CDCInterfaceInfo->DataINEndpointNumber);
 146
 147         if (!(Endpoint_IsReadWriteAllowed()))
 148         {
 149                 Endpoint_ClearIN();
 150                 while (!(Endpoint_IsReadWriteAllowed()));
 151         }
 152
 153         Endpoint_Write_Byte(Data);
 154 }
 155
 156 uint16_t USB_CDC_BytesReceived(USB_ClassInfo_CDC_t* CDCInterfaceInfo)
 157 {
 158         Endpoint_SelectEndpoint(CDCInterfaceInfo->DataOUTEndpointNumber);
 159
 160         return Endpoint_BytesInEndpoint();
 161 }
 162
 163 uint8_t USB_CDC_ReceiveByte(USB_ClassInfo_CDC_t* CDCInterfaceInfo)
 164 {
 165         if (!(USB_IsConnected))
 166           return 0;
 167
 168         Endpoint_SelectEndpoint(CDCInterfaceInfo->DataOUTEndpointNumber);
 169
 170         uint8_t DataByte = Endpoint_Read_Byte();
 171
 172         if (!(Endpoint_BytesInEndpoint()))
 173           Endpoint_ClearOUT();
 174
 175         return DataByte;
 176 }
 177
 178 void USB_CDC_SendSerialLineStateChange(USB_ClassInfo_CDC_t* CDCInterfaceInfo, uint16_t LineStateMask)
 179 {
 180         if (!(USB_IsConnected))
 181           return;
 182
 183         Endpoint_SelectEndpoint(CDCInterfaceInfo->NotificationEndpointNumber);
 184
 185         USB_Request_Header_t Notification = (USB_Request_Header_t)
 186                 {
 187                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
 188                         .bRequest      = NOTIF_SerialState,
 189                         .wValue        = 0,
 190                         .wIndex        = 0,
 191                         .wLength       = sizeof(uint16_t),
 192                 };
 193
 194         Endpoint_Write_Stream_LE(&Notification, sizeof(Notification), NO_STREAM_CALLBACK);
 195         Endpoint_Write_Stream_LE(&LineStateMask, sizeof(LineStateMask), NO_STREAM_CALLBACK);
 196         Endpoint_ClearIN();
 197 }