CDC.c 11 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
/*
             LUFA Library
     Copyright (C) Dean Camera, 2009.
              
  dean [at] fourwalledcubicle [dot] com
      www.fourwalledcubicle.com
*/

/*
  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, and distribute this software
  and its documentation for any purpose and without fee is hereby
  granted, provided that the above copyright notice appear in all
  copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaim all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

#include "../../HighLevel/USBMode.h"
#if defined(USB_CAN_BE_HOST)

#define  INCLUDE_FROM_CDC_CLASS_HOST_C
#include "CDC.h"

37
uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, uint16_t ConfigDescriptorSize,
38
                                uint8_t* ConfigDescriptorData)
39
{
40
	uint8_t FoundEndpoints = 0;
41

42
43
	memset(&CDCInterfaceInfo->State, 0x00, sizeof(CDCInterfaceInfo->State));

44
	if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
45
	  return CDC_ENUMERROR_InvalidConfigDescriptor;
46
47
48
49
	
	if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
	                              DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
	{
50
		return CDC_ENUMERROR_NoCDCInterfaceFound;
51
	}
52
	
53
	CDCInterfaceInfo->State.ControlInterfaceNumber = DESCRIPTOR_CAST(ConfigDescriptorData, USB_Descriptor_Interface_t).InterfaceNumber;
54

55
	while (FoundEndpoints != (CDC_FOUND_NOTIFICATION_IN | CDC_FOUND_DATAPIPE_IN | CDC_FOUND_DATAPIPE_OUT))
56
57
	{
		if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
58
		                              DComp_CDC_Host_NextCDCInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
59
		{
60
			if (FoundEndpoints & CDC_FOUND_NOTIFICATION_IN)
61
62
63
64
			{
				if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, 
				                              DComp_CDC_Host_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
				{
65
					return CDC_ENUMERROR_NoCDCInterfaceFound;
66
67
68
69
70
71
				}
			}
			else
			{
				FoundEndpoints = 0;

72
				Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
73
				Pipe_DisablePipe();
74
				Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);
75
				Pipe_DisablePipe();
76
				Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipeNumber);
77
78
79
80
81
				Pipe_DisablePipe();
			
				if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
				                              DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
				{
82
					return CDC_ENUMERROR_NoCDCInterfaceFound;
83
84
85
86
				}
			}

			if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
87
			                              DComp_CDC_Host_NextCDCInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
88
			{
89
				return CDC_ENUMERROR_EndpointsNotFound;
90
91
92
93
94
95
96
97
98
			}
		}
		
		USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);

		if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
		{
			if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
			{							   
99
				Pipe_ConfigurePipe(CDCInterfaceInfo->Config.NotificationPipeNumber, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
100
								   EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
101
				CDCInterfaceInfo->State.NotificationPipeSize = EndpointData->EndpointSize;
102
103
104

				Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS);
				
105
				FoundEndpoints |= CDC_FOUND_NOTIFICATION_IN;
106
107
108
109
110
111
			}
		}
		else
		{
			if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
			{
112
				Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataINPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_IN,
113
								   EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
114
				CDCInterfaceInfo->State.DataINPipeSize = EndpointData->EndpointSize;
115

116
				FoundEndpoints |= CDC_FOUND_DATAPIPE_IN;
117
118
119
			}
			else
			{
120
				Pipe_ConfigurePipe(CDCInterfaceInfo->Config.DataOUTPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_OUT,
121
								   EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
122
				CDCInterfaceInfo->State.DataOUTPipeSize = EndpointData->EndpointSize;
123
				
124
				FoundEndpoints |= CDC_FOUND_DATAPIPE_OUT;
125
126
127
128
			}
		}
	}

129
130
	CDCInterfaceInfo->State.ControlLineStates.HostToDevice = (CDC_CONTROL_LINE_OUT_RTS | CDC_CONTROL_LINE_OUT_DTR);
	CDCInterfaceInfo->State.ControlLineStates.DeviceToHost = (CDC_CONTROL_LINE_IN_DCD  | CDC_CONTROL_LINE_IN_DSR);
131
	CDCInterfaceInfo->State.IsActive = true;
132
	return CDC_ENUMERROR_NoError;
133
134
135
136
137
138
}

static uint8_t DComp_CDC_Host_NextCDCControlInterface(void* CurrentDescriptor)
{
	if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
	{
139
140
141
142
143
144
		USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
		                                                                USB_Descriptor_Interface_t);
	
		if ((CurrentInterface->Class    == CDC_CONTROL_CLASS)    &&
		    (CurrentInterface->SubClass == CDC_CONTROL_SUBCLASS) &&
			(CurrentInterface->Protocol == CDC_CONTROL_PROTOCOL))
145
146
147
148
149
150
151
152
153
154
155
156
		{
			return DESCRIPTOR_SEARCH_Found;
		}
	}
	
	return DESCRIPTOR_SEARCH_NotFound;
}

static uint8_t DComp_CDC_Host_NextCDCDataInterface(void* CurrentDescriptor)
{
	if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
	{
157
158
159
160
161
162
		USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
		                                                                USB_Descriptor_Interface_t);
	
		if ((CurrentInterface->Class    == CDC_DATA_CLASS)    &&
		    (CurrentInterface->SubClass == CDC_DATA_SUBCLASS) &&
			(CurrentInterface->Protocol == CDC_DATA_PROTOCOL))
163
164
165
166
167
168
169
170
		{
			return DESCRIPTOR_SEARCH_Found;
		}
	}
	
	return DESCRIPTOR_SEARCH_NotFound;
}

171
static uint8_t DComp_CDC_Host_NextCDCInterfaceEndpoint(void* CurrentDescriptor)
172
173
174
{
	if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
	{
175
		USB_Descriptor_Endpoint_t* CurrentEndpoint = DESCRIPTOR_PCAST(CurrentDescriptor,
176
		                                                              USB_Descriptor_Endpoint_t);
177
178
	
		uint8_t EndpointType = (CurrentEndpoint->Attributes & EP_TYPE_MASK);
179
	
180
181
182
183
184
		if (((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT)) &&
		    !(Pipe_IsEndpointBound(CurrentEndpoint->EndpointAddress)))
		{
			return DESCRIPTOR_SEARCH_Found;
		}
185
186
187
188
189
190
191
192
193
	}
	else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
	{
		return DESCRIPTOR_SEARCH_Fail;
	}

	return DESCRIPTOR_SEARCH_NotFound;
}

194
void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
195
{
196
	if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
197
198
199
200
201
202
203
204
	  return;
	
	Pipe_SelectPipe(CDCInterfaceInfo->Config.NotificationPipeNumber);	
	Pipe_Unfreeze();

	if (Pipe_IsINReceived())
	{
		USB_Request_Header_t Notification;
205
		Pipe_Read_Stream_LE(&Notification, sizeof(USB_Request_Header_t), NO_STREAM_CALLBACK);
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
		
		if ((Notification.bRequest      == NOTIF_SerialState) &&
		    (Notification.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)))
		{
			Pipe_Read_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
			                    sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
			                    NO_STREAM_CALLBACK);
			
		}

		Pipe_ClearIN();

		EVENT_CDC_Host_ControLineStateChanged(CDCInterfaceInfo);
	}
	
	Pipe_Freeze();
222
223
}

224
uint8_t CDC_Host_SetLineEncoding(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
225
226
227
228
{
	USB_ControlRequest = (USB_Request_Header_t)
	{
		.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
229
		.bRequest      = REQ_SetLineEncoding,
230
231
232
233
234
235
236
237
238
239
		.wValue        = 0,
		.wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
		.wLength       = sizeof(CDCInterfaceInfo->State.LineEncoding),
	};

	Pipe_SelectPipe(PIPE_CONTROLPIPE);
	
	return USB_Host_SendControlRequest(&CDCInterfaceInfo->State.LineEncoding);
}

240
uint8_t CDC_Host_SendControlLineStateChange(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
{
	USB_ControlRequest = (USB_Request_Header_t)
	{
		.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
		.bRequest      = REQ_SetControlLineState,
		.wValue        = CDCInterfaceInfo->State.ControlLineStates.HostToDevice,
		.wIndex        = CDCInterfaceInfo->State.ControlInterfaceNumber,
		.wLength       = 0,
	};

	Pipe_SelectPipe(PIPE_CONTROLPIPE);
	
	return USB_Host_SendControlRequest(NULL);
}

256
uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, char* Data, const uint16_t Length)
257
{
258
	if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
259
	  return PIPE_READYWAIT_NoError;
260

261
262
	uint8_t ErrorCode;

263
264
	Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);	
	Pipe_Unfreeze();
265
	ErrorCode = Pipe_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
266
	Pipe_Freeze();
267
268
	
	return ErrorCode;
269
270
}

271
uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, const uint8_t Data)
272
{
273
	if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
274
	  return PIPE_READYWAIT_NoError;;
275
	  
276
	uint8_t ErrorCode;
277
278
279
280
281
282
283

	Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);	
	Pipe_Unfreeze();
	
	if (!(Pipe_IsReadWriteAllowed()))
	{
		Pipe_ClearOUT();
284
285
286

		if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)
		  return ErrorCode;
287
288
289
290
	}

	Pipe_Write_Byte(Data);	
	Pipe_Freeze();
291
	
292
	return PIPE_READYWAIT_NoError;
293
294
}

295
uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
296
297
298
{
	uint16_t BytesInPipe = 0;

299
	if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
300
301
302
303
304
305
306
307
308
309
310
311
312
313
	  return BytesInPipe;
	
	Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);	
	Pipe_Unfreeze();

	if (Pipe_IsINReceived() && !(Pipe_BytesInPipe()))
	  Pipe_ClearIN();
	
	BytesInPipe = Pipe_BytesInPipe();
	Pipe_Freeze();
	
	return BytesInPipe;
}

314
uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
315
316
317
{
	uint8_t ReceivedByte = 0;

318
	if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
	  return ReceivedByte;
	  
	Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);	
	Pipe_Unfreeze();

	ReceivedByte = Pipe_Read_Byte();
	
	if (!(Pipe_BytesInPipe()))
	  Pipe_ClearIN();
	
	Pipe_Freeze();
	
	return ReceivedByte;
}

void CDC_Host_Event_Stub(void)
335
336
337
338
339
{

}

#endif