CDC.c 9.64 KB
Newer Older
1
2
3
/*
             LUFA Library
     Copyright (C) Dean Camera, 2010.
4

5
  dean [at] fourwalledcubicle [dot] com
6
           www.lufa-lib.org
7
8
9
10
11
*/

/*
  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)

12
  Permission to use, copy, modify, distribute, and sell this
13
  software and its documentation for any purpose is hereby granted
14
  without fee, provided that the above copyright notice appear in
15
  all copies and that both that the copyright notice and this
16
17
18
  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
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
  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.
*/

#define  __INCLUDE_FROM_USB_DRIVER
#include "../../HighLevel/USBMode.h"
#if defined(USB_CAN_BE_DEVICE)

#define  __INCLUDE_FROM_CDC_DRIVER
36
#define  __INCLUDE_FROM_CDC_DEVICE_C
37
38
39
40
41
42
43
#include "CDC.h"

void CDC_Device_Event_Stub(void)
{

}

44
void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
45
46
47
{
	if (!(Endpoint_IsSETUPReceived()))
	  return;
48

49
50
51
52
53
	if (USB_ControlRequest.wIndex != CDCInterfaceInfo->Config.ControlInterfaceNumber)
	  return;

	switch (USB_ControlRequest.bRequest)
	{
54
		case CDC_REQ_GetLineEncoding:
55
56
57
58
59
60
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
				Endpoint_Write_Control_Stream_LE(&CDCInterfaceInfo->State.LineEncoding, sizeof(CDCInterfaceInfo->State.LineEncoding));
				Endpoint_ClearOUT();
			}
61

62
			break;
63
		case CDC_REQ_SetLineEncoding:
64
65
66
67
68
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
				Endpoint_Read_Control_Stream_LE(&CDCInterfaceInfo->State.LineEncoding, sizeof(CDCInterfaceInfo->State.LineEncoding));
				Endpoint_ClearIN();
69
70

				EVENT_CDC_Device_LineEncodingChanged(CDCInterfaceInfo);
71
			}
72

73
			break;
74
		case CDC_REQ_SetControlLineState:
75
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
76
			{
77
78
				Endpoint_ClearSETUP();
				Endpoint_ClearStatusStage();
79

80
81
				CDCInterfaceInfo->State.ControlLineStates.HostToDevice = USB_ControlRequest.wValue;

82
				EVENT_CDC_Device_ControLineStateChanged(CDCInterfaceInfo);
83
			}
84

85
			break;
86
		case CDC_REQ_SendBreak:
87
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
88
			{
89
90
				Endpoint_ClearSETUP();
				Endpoint_ClearStatusStage();
91
92

				EVENT_CDC_Device_BreakSent(CDCInterfaceInfo, (uint8_t)USB_ControlRequest.wValue);
93
94
95
96
97
98
			}

			break;
	}
}

99
bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
100
101
102
{
	memset(&CDCInterfaceInfo->State, 0x00, sizeof(CDCInterfaceInfo->State));

103
	for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
104
	{
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
		uint16_t Size;
		uint8_t  Type;
		uint8_t  Direction;
		bool     DoubleBanked;

		if (EndpointNum == CDCInterfaceInfo->Config.DataINEndpointNumber)
		{
			Size         = CDCInterfaceInfo->Config.DataINEndpointSize;
			Direction    = ENDPOINT_DIR_IN;
			Type         = EP_TYPE_BULK;
			DoubleBanked = CDCInterfaceInfo->Config.DataINEndpointDoubleBank;
		}
		else if (EndpointNum == CDCInterfaceInfo->Config.DataOUTEndpointNumber)
		{
			Size         = CDCInterfaceInfo->Config.DataOUTEndpointSize;
			Direction    = ENDPOINT_DIR_OUT;
			Type         = EP_TYPE_BULK;
			DoubleBanked = CDCInterfaceInfo->Config.DataOUTEndpointDoubleBank;
		}
		else if (EndpointNum == CDCInterfaceInfo->Config.NotificationEndpointNumber)
		{
			Size         = CDCInterfaceInfo->Config.NotificationEndpointSize;
			Direction    = ENDPOINT_DIR_IN;
			Type         = EP_TYPE_INTERRUPT;
			DoubleBanked = CDCInterfaceInfo->Config.NotificationEndpointDoubleBank;
		}
		else
		{
			continue;
		}
135

136
		if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
137
		                                 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
138
139
140
		{
			return false;
		}
141
	}
142

143
144
145
	return true;
}

146
void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
147
148
149
{
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
	  return;
150

151
	#if !defined(NO_CLASS_DRIVER_AUTOFLUSH)
152
	CDC_Device_Flush(CDCInterfaceInfo);
153
	#endif
154
155
}

156
uint8_t CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
157
                              const char* const Data,
158
                              const uint16_t Length)
159
160
161
{
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
	  return ENDPOINT_RWSTREAM_DeviceDisconnected;
162

163
164
165
166
	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
	return Endpoint_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
}

167
168
uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
                            const uint8_t Data)
169
170
171
172
173
174
175
{
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
	  return ENDPOINT_RWSTREAM_DeviceDisconnected;

	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);

	if (!(Endpoint_IsReadWriteAllowed()))
176
	{
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
		Endpoint_ClearIN();

		uint8_t ErrorCode;

		if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
		  return ErrorCode;
	}

	Endpoint_Write_Byte(Data);
	return ENDPOINT_READYWAIT_NoError;
}

uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
	  return ENDPOINT_RWSTREAM_DeviceDisconnected;

	uint8_t ErrorCode;

	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);

	if (!(Endpoint_BytesInEndpoint()))
	  return ENDPOINT_READYWAIT_NoError;
200

201
	bool BankFull = !(Endpoint_IsReadWriteAllowed());
202

203
	Endpoint_ClearIN();
204

205
206
207
208
209
210
211
	if (BankFull)
	{
		if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
		  return ErrorCode;

		Endpoint_ClearIN();
	}
212

213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
	return ENDPOINT_READYWAIT_NoError;
}

uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
	  return 0;

	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);

	if (Endpoint_IsOUTReceived())
	{
		if (!(Endpoint_BytesInEndpoint()))
		{
			Endpoint_ClearOUT();
			return 0;
		}
		else
		{
			return Endpoint_BytesInEndpoint();
		}
	}
	else
	{
		return 0;
	}
}

241
int16_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
242
243
{
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
244
245
246
	  return -1;

	int16_t ReceivedByte = -1;
247
248

	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
249

250
251
252
253
	if (Endpoint_IsOUTReceived())
	{
		if (Endpoint_BytesInEndpoint())
		  ReceivedByte = Endpoint_Read_Byte();
254

255
256
257
		if (!(Endpoint_BytesInEndpoint()))
		  Endpoint_ClearOUT();
	}
258

259
	return ReceivedByte;
260
261
262
263
264
265
266
267
}

void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
	  return;

	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber);
268

269
270
271
	USB_Request_Header_t Notification = (USB_Request_Header_t)
		{
			.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
272
			.bRequest      = CDC_NOTIF_SerialState,
273
274
275
276
277
278
279
280
281
282
283
284
			.wValue        = 0,
			.wIndex        = 0,
			.wLength       = sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
		};

	Endpoint_Write_Stream_LE(&Notification, sizeof(USB_Request_Header_t), NO_STREAM_CALLBACK);
	Endpoint_Write_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
	                         sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
	                         NO_STREAM_CALLBACK);
	Endpoint_ClearIN();
}

285
286
void CDC_Device_CreateStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
                             FILE* const Stream)
287
288
289
290
291
{
	*Stream = (FILE)FDEV_SETUP_STREAM(CDC_Device_putchar, CDC_Device_getchar, _FDEV_SETUP_RW);
	fdev_set_udata(Stream, CDCInterfaceInfo);
}

292
293
void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
                                     FILE* const Stream)
294
295
296
297
298
{
	*Stream = (FILE)FDEV_SETUP_STREAM(CDC_Device_putchar, CDC_Device_getchar_Blocking, _FDEV_SETUP_RW);
	fdev_set_udata(Stream, CDCInterfaceInfo);
}

299
300
static int CDC_Device_putchar(char c,
                              FILE* Stream)
301
302
303
304
305
306
{
	return CDC_Device_SendByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;
}

static int CDC_Device_getchar(FILE* Stream)
{
307
308
309
	int16_t ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));

	if (ReceivedByte < 0)
310
311
	  return _FDEV_EOF;

312
	return ReceivedByte;
313
314
315
316
}

static int CDC_Device_getchar_Blocking(FILE* Stream)
{
317
	int16_t ReceivedByte;
318

319
	while ((ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))) < 0)
320
321
322
	{
		if (USB_DeviceState == DEVICE_STATE_Unattached)
		  return _FDEV_EOF;
323

324
		CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
325
		USB_USBTask();
326
327
	}

328
	return ReceivedByte;
329
330
331
}

#endif
332