CDC.c 9.06 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
/*
             LUFA Library
     Copyright (C) Dean Camera, 2009.
              
  dean [at] fourwalledcubicle [dot] com
      www.fourwalledcubicle.com
*/

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

12
13
14
15
16
17
18
  Permission to use, copy, modify, distribute, and sell this 
  software and its documentation for any purpose is hereby granted
  without fee, 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 
19
20
21
22
23
24
25
26
27
28
29
30
  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.
*/

31
32
33
34
#include "../../HighLevel/USBMode.h"
#if defined(USB_CAN_BE_DEVICE)

#define  INCLUDE_FROM_CDC_CLASS_DEVICE_C
35
36
#include "CDC.h"

37
void CDC_Device_Event_Stub(void)
38
39
40
41
{

}

42
void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
43
44
45
46
{
	if (!(Endpoint_IsSETUPReceived()))
	  return;
	  
47
	if (USB_ControlRequest.wIndex != CDCInterfaceInfo->Config.ControlInterfaceNumber)
48
49
50
51
52
53
54
55
	  return;

	switch (USB_ControlRequest.bRequest)
	{
		case REQ_GetLineEncoding:
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
56
				Endpoint_Write_Control_Stream_LE(&CDCInterfaceInfo->State.LineEncoding, sizeof(CDCInterfaceInfo->State.LineEncoding));
57
58
59
60
61
62
63
64
				Endpoint_ClearOUT();
			}
			
			break;
		case REQ_SetLineEncoding:
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
65
				Endpoint_Read_Control_Stream_LE(&CDCInterfaceInfo->State.LineEncoding, sizeof(CDCInterfaceInfo->State.LineEncoding));
66
67
				Endpoint_ClearIN();

68
				EVENT_CDC_Device_LineEncodingChanged(CDCInterfaceInfo);
69
70
71
72
73
74
75
76
			}
	
			break;
		case REQ_SetControlLineState:
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{				
				Endpoint_ClearSETUP();
				
77
				CDCInterfaceInfo->State.ControlLineStates.HostToDevice = USB_ControlRequest.wValue;
78
				
79
				EVENT_CDC_Device_ControLineStateChanged(CDCInterfaceInfo);
80

81
				Endpoint_ClearStatusStage();
82
83
84
85
86
87
			}
	
			break;
	}
}

88
bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
89
{
90
91
	memset(&CDCInterfaceInfo->State, 0x00, sizeof(CDCInterfaceInfo->State));

92
93
	if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber, EP_TYPE_BULK,
							         ENDPOINT_DIR_IN, CDCInterfaceInfo->Config.DataINEndpointSize,
94
							         CDCInterfaceInfo->Config.DataINEndpointDoubleBank ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
95
96
97
98
	{
		return false;
	}

99
100
	if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber, EP_TYPE_BULK,
	                                 ENDPOINT_DIR_OUT, CDCInterfaceInfo->Config.DataOUTEndpointSize,
101
	                                 CDCInterfaceInfo->Config.DataOUTEndpointDoubleBank ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
102
103
104
105
	{
		return false;
	}

106
107
	if (!(Endpoint_ConfigureEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber, EP_TYPE_INTERRUPT,
	                                 ENDPOINT_DIR_IN, CDCInterfaceInfo->Config.NotificationEndpointSize,
108
	                                 CDCInterfaceInfo->Config.NotificationEndpointDoubleBank ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
109
110
111
112
113
114
115
	{
		return false;
	}

	return true;
}

116
void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
117
{
118
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
119
120
	  return;

121
122
123
124
125
	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);

	if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))
	  Endpoint_ClearOUT();
	  
126
	CDC_Device_Flush(CDCInterfaceInfo);
127
128
}

129
uint8_t CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, char* const Data, const uint16_t Length)
130
{
131
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
132
	  return ENDPOINT_RWSTREAM_DeviceDisconnected;
133
	
134
	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
135
	return Endpoint_Write_Stream_LE(Data, Length, NO_STREAM_CALLBACK);
136
137
}

138
uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Data)
139
{
140
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
141
	  return ENDPOINT_RWSTREAM_DeviceDisconnected;
142

143
	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
144
145

	if (!(Endpoint_IsReadWriteAllowed()))
146
	{	
147
		Endpoint_ClearIN();
148

149
150
		uint8_t ErrorCode;

151
152
		if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
		  return ErrorCode;
153
154
	}

155
156
	Endpoint_Write_Byte(Data);
	return ENDPOINT_READYWAIT_NoError;
157
158
}

159
uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
160
161
{
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
162
	  return ENDPOINT_RWSTREAM_DeviceDisconnected;
163

164
165
	uint8_t ErrorCode;

166
	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
167
168
169
170
171

	if (!(Endpoint_BytesInEndpoint()))
	  return ENDPOINT_READYWAIT_NoError;
	
	bool BankFull = !(Endpoint_IsReadWriteAllowed());
172
	
173
174
175
	Endpoint_ClearIN();
	
	if (BankFull)
176
	{
177
178
		if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
		  return ErrorCode;
179
180

		Endpoint_ClearIN();
181
182
	}
	
183
	return ENDPOINT_READYWAIT_NoError;
184
185
}

186
uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
187
{
188
189
190
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
	  return 0;

191
	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
192

193
194
195
	if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))
	  Endpoint_ClearOUT();

196
197
198
	return Endpoint_BytesInEndpoint();
}

199
uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
200
{
201
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
202
203
	  return 0;

204
	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
205
206
207
208
209
210
211
212
213
	
	uint8_t DataByte = Endpoint_Read_Byte();
	
	if (!(Endpoint_BytesInEndpoint()))
	  Endpoint_ClearOUT();
	  
	return DataByte;
}

214
void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
215
{
216
	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
217
218
	  return;

219
	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber);
220
221
222
223
224
225
226
	
	USB_Request_Header_t Notification = (USB_Request_Header_t)
		{
			.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
			.bRequest      = NOTIF_SerialState,
			.wValue        = 0,
			.wIndex        = 0,
227
			.wLength       = sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
228
229
		};

230
	Endpoint_Write_Stream_LE(&Notification, sizeof(USB_Request_Header_t), NO_STREAM_CALLBACK);
231
232
233
	Endpoint_Write_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
	                         sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
	                         NO_STREAM_CALLBACK);
234
235
	Endpoint_ClearIN();
}
236

237
238
239
240
241
242
void CDC_Device_CreateStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream)
{
	*Stream = (FILE)FDEV_SETUP_STREAM(CDC_Device_putchar, CDC_Device_getchar, _FDEV_SETUP_RW);
	fdev_set_udata(Stream, CDCInterfaceInfo);
}

243
244
245
246
247
248
void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream)
{
	*Stream = (FILE)FDEV_SETUP_STREAM(CDC_Device_putchar, CDC_Device_getchar_Blocking, _FDEV_SETUP_RW);
	fdev_set_udata(Stream, CDCInterfaceInfo);
}

249
250
static int CDC_Device_putchar(char c, FILE* Stream)
{
251
	return CDC_Device_SendByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;
252
253
254
255
256
}

static int CDC_Device_getchar(FILE* Stream)
{
	if (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))
257
	  return _FDEV_EOF;
258
259
260
261

	return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
}

262
263
264
265
266
267
268
269
270
271
272
static int CDC_Device_getchar_Blocking(FILE* Stream)
{
	while (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))
	{
		CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
		USB_USBTask();
	}

	return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
}

273
#endif