Revision 6ebafa20 Descriptors.c

View differences:

Descriptors.c
1
/*
2
             LUFA Library
3
     Copyright (C) Dean Camera, 2011.
4

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

  
9
/*
10
  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
11
  Copyright 2010  Denver Gingerich (denver [at] ossguy [dot] com)
12

  
13
  Permission to use, copy, modify, distribute, and sell this
14
  software and its documentation for any purpose is hereby granted
15
  without fee, provided that the above copyright notice appear in
16
  all copies and that both that the copyright notice and this
17
  permission notice and warranty disclaimer appear in supporting
18
  documentation, and that the name of the author not be used in
19
  advertising or publicity pertaining to distribution of the
20
  software without specific, written prior permission.
21

  
22
  The author disclaim all warranties with regard to this
23
  software, including all implied warranties of merchantability
24
  and fitness.  In no event shall the author be liable for any
25
  special, indirect or consequential damages or any damages
26
  whatsoever resulting from loss of use, data or profits, whether
27
  in an action of contract, negligence or other tortious action,
28
  arising out of or in connection with the use or performance of
29
  this software.
30
*/
31

  
32
/** \file
33
 *
34
 *  USB Device Descriptors, for library use when in USB device mode. Descriptors are special
35
 *  computer-readable structures which the host requests upon device enumeration, to determine
36
 *  the device's capabilities and functions.
37
 */
38

  
39
#include "Descriptors.h"
40

  
41
/** HID class report descriptor. This is a special descriptor constructed with values from the
42
 *  USBIF HID class specification to describe the reports and capabilities of the HID device. This
43
 *  descriptor is parsed by the host and its contents used to determine what data (and in what encoding)
44
 *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
45
 *  more details on HID report descriptors.
46
 */
47
const USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
48
{
49
	HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
50
	HID_RI_USAGE(8, 0x06), /* Keyboard */
51
	HID_RI_COLLECTION(8, 0x01), /* Application */
52
	    HID_RI_USAGE_PAGE(8, 0x07), /* Key Codes */
53
	    HID_RI_USAGE_MINIMUM(8, 0xE0), /* Keyboard Left Control */
54
	    HID_RI_USAGE_MAXIMUM(8, 0xE7), /* Keyboard Right GUI */
55
	    HID_RI_LOGICAL_MINIMUM(8, 0x00),
56
	    HID_RI_LOGICAL_MAXIMUM(8, 0x01),
57
	    HID_RI_REPORT_SIZE(8, 0x01),
58
	    HID_RI_REPORT_COUNT(8, 0x08),
59
	    HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
60
	    HID_RI_REPORT_COUNT(8, 0x01),
61
	    HID_RI_REPORT_SIZE(8, 0x08),
62
	    HID_RI_INPUT(8, HID_IOF_CONSTANT),
63
	    HID_RI_USAGE_PAGE(8, 0x08), /* LEDs */
64
	    HID_RI_USAGE_MINIMUM(8, 0x01), /* Num Lock */
65
	    HID_RI_USAGE_MAXIMUM(8, 0x05), /* Kana */
66
	    HID_RI_REPORT_COUNT(8, 0x05),
67
	    HID_RI_REPORT_SIZE(8, 0x01),
68
	    HID_RI_OUTPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE | HID_IOF_NON_VOLATILE),
69
	    HID_RI_REPORT_COUNT(8, 0x01),
70
	    HID_RI_REPORT_SIZE(8, 0x03),
71
	    HID_RI_OUTPUT(8, HID_IOF_CONSTANT),
72
	    HID_RI_LOGICAL_MINIMUM(8, 0x00),
73
	    HID_RI_LOGICAL_MAXIMUM(8, 0x65),
74
	    HID_RI_USAGE_PAGE(8, 0x07), /* Keyboard */
75
	    HID_RI_USAGE_MINIMUM(8, 0x00), /* Reserved (no event indicated) */
76
	    HID_RI_USAGE_MAXIMUM(8, 0x65), /* Keyboard Application */
77
	    HID_RI_REPORT_COUNT(8, 0x06),
78
	    HID_RI_REPORT_SIZE(8, 0x08),
79
	    HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_ARRAY | HID_IOF_ABSOLUTE),
80
	HID_RI_END_COLLECTION(0),
81
};
82

  
83
/** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
84
 *  device characteristics, including the supported USB version, control endpoint size and the
85
 *  number of device configurations. The descriptor is read out by the USB host when the enumeration
86
 *  process begins.
87
 */
88
const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
89
{
90
	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
91

  
92
	.USBSpecification       = VERSION_BCD(01.10),
93
	.Class                  = USB_CSCP_NoDeviceClass,
94
	.SubClass               = USB_CSCP_NoDeviceSubclass,
95
	.Protocol               = USB_CSCP_NoDeviceProtocol,
96

  
97
	.Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
98

  
99
	.VendorID               = 0x03EB,
100
	.ProductID              = 0x2042,
101
	.ReleaseNumber          = VERSION_BCD(00.01),
102

  
103
	.ManufacturerStrIndex   = 0x01,
104
	.ProductStrIndex        = 0x02,
105
	.SerialNumStrIndex      = NO_DESCRIPTOR,
106

  
107
	.NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
108
};
109

  
110
/** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
111
 *  of the device in one of its supported configurations, including information about any device interfaces
112
 *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
113
 *  a configuration so that the host may correctly communicate with the USB device.
114
 */
115
const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
116
{
117
	.Config =
118
		{
119
			.Header                 = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
120

  
121
			.TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),
122
			.TotalInterfaces        = 1,
123

  
124
			.ConfigurationNumber    = 1,
125
			.ConfigurationStrIndex  = NO_DESCRIPTOR,
126

  
127
			.ConfigAttributes       = (USB_CONFIG_ATTR_BUSPOWERED | USB_CONFIG_ATTR_SELFPOWERED),
128

  
129
			.MaxPowerConsumption    = USB_CONFIG_POWER_MA(100)
130
		},
131

  
132
	.HID_Interface =
133
		{
134
			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
135

  
136
			.InterfaceNumber        = 0x00,
137
			.AlternateSetting       = 0x00,
138

  
139
			.TotalEndpoints         = 2,
140

  
141
			.Class                  = HID_CSCP_HIDClass,
142
			.SubClass               = HID_CSCP_BootSubclass,
143
			.Protocol               = HID_CSCP_KeyboardBootProtocol,
144

  
145
			.InterfaceStrIndex      = NO_DESCRIPTOR
146
		},
147

  
148
	.HID_KeyboardHID =
149
		{
150
			.Header                 = {.Size = sizeof(USB_HID_Descriptor_HID_t), .Type = HID_DTYPE_HID},
151

  
152
			.HIDSpec                = VERSION_BCD(01.11),
153
			.CountryCode            = 0x00,
154
			.TotalReportDescriptors = 1,
155
			.HIDReportType          = HID_DTYPE_Report,
156
			.HIDReportLength        = sizeof(KeyboardReport)
157
		},
158

  
159
	.HID_ReportINEndpoint =
160
		{
161
			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
162

  
163
			.EndpointAddress        = (ENDPOINT_DIR_IN | KEYBOARD_IN_EPNUM),
164
			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
165
			.EndpointSize           = KEYBOARD_EPSIZE,
166
			.PollingIntervalMS      = 0x01
167
		},
168

  
169
	.HID_ReportOUTEndpoint =
170
		{
171
			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
172

  
173
			.EndpointAddress        = (ENDPOINT_DIR_OUT | KEYBOARD_OUT_EPNUM),
174
			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
175
			.EndpointSize           = KEYBOARD_EPSIZE,
176
			.PollingIntervalMS      = 0x01
177
		}
178
};
179

  
180
/** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
181
 *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
182
 *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
183
 */
184
const USB_Descriptor_String_t PROGMEM LanguageString =
185
{
186
	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
187

  
188
	.UnicodeString          = {LANGUAGE_ID_ENG}
189
};
190

  
191
/** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
192
 *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
193
 *  Descriptor.
194
 */
195
const USB_Descriptor_String_t PROGMEM ManufacturerString =
196
{
197
	.Header                 = {.Size = USB_STRING_LEN(8), .Type = DTYPE_String},
198

  
199
	.UnicodeString          = L"imp tech"
200
};
201

  
202
/** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
203
 *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
204
 *  Descriptor.
205
 */
206
const USB_Descriptor_String_t PROGMEM ProductString =
207
{
208
	.Header                 = {.Size = USB_STRING_LEN(10), .Type = DTYPE_String},
209

  
210
	.UnicodeString          = L"tasta v0.2"
211
};
212

  
213
/** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
214
 *  documentation) by the application code so that the address and size of a requested descriptor can be given
215
 *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
216
 *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
217
 *  USB host.
218
 */
219
uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
220
                                    const uint8_t wIndex,
221
                                    const void** const DescriptorAddress)
222
{
223
	const uint8_t  DescriptorType   = (wValue >> 8);
224
	const uint8_t  DescriptorNumber = (wValue & 0xFF);
225

  
226
	const void* Address = NULL;
227
	uint16_t    Size    = NO_DESCRIPTOR;
228

  
229
	switch (DescriptorType)
230
	{
231
		case DTYPE_Device:
232
			Address = &DeviceDescriptor;
233
			Size    = sizeof(USB_Descriptor_Device_t);
234
			break;
235
		case DTYPE_Configuration:
236
			Address = &ConfigurationDescriptor;
237
			Size    = sizeof(USB_Descriptor_Configuration_t);
238
			break;
239
		case DTYPE_String:
240
			switch (DescriptorNumber)
241
			{
242
				case 0x00:
243
					Address = &LanguageString;
244
					Size    = pgm_read_byte(&LanguageString.Header.Size);
245
					break;
246
				case 0x01:
247
					Address = &ManufacturerString;
248
					Size    = pgm_read_byte(&ManufacturerString.Header.Size);
249
					break;
250
				case 0x02:
251
					Address = &ProductString;
252
					Size    = pgm_read_byte(&ProductString.Header.Size);
253
					break;
254
			}
255

  
256
			break;
257
		case HID_DTYPE_HID:
258
			Address = &ConfigurationDescriptor.HID_KeyboardHID;
259
			Size    = sizeof(USB_HID_Descriptor_HID_t);
260
			break;
261
		case HID_DTYPE_Report:
262
			Address = &KeyboardReport;
263
			Size    = sizeof(KeyboardReport);
264
			break;
265
	}
266

  
267
	*DescriptorAddress = Address;
268
	return Size;
269
}
270

  
1
/*
2
             LUFA Library
3
     Copyright (C) Dean Camera, 2011.
4

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

  
9
/*
10
  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
11
  Copyright 2010  Denver Gingerich (denver [at] ossguy [dot] com)
12

  
13
  Permission to use, copy, modify, distribute, and sell this
14
  software and its documentation for any purpose is hereby granted
15
  without fee, provided that the above copyright notice appear in
16
  all copies and that both that the copyright notice and this
17
  permission notice and warranty disclaimer appear in supporting
18
  documentation, and that the name of the author not be used in
19
  advertising or publicity pertaining to distribution of the
20
  software without specific, written prior permission.
21

  
22
  The author disclaim all warranties with regard to this
23
  software, including all implied warranties of merchantability
24
  and fitness.  In no event shall the author be liable for any
25
  special, indirect or consequential damages or any damages
26
  whatsoever resulting from loss of use, data or profits, whether
27
  in an action of contract, negligence or other tortious action,
28
  arising out of or in connection with the use or performance of
29
  this software.
30
*/
31

  
32
/** \file
33
 *
34
 *  USB Device Descriptors, for library use when in USB device mode. Descriptors are special
35
 *  computer-readable structures which the host requests upon device enumeration, to determine
36
 *  the device's capabilities and functions.
37
 */
38

  
39
#include "Descriptors.h"
40

  
41
/** HID class report descriptor. This is a special descriptor constructed with values from the
42
 *  USBIF HID class specification to describe the reports and capabilities of the HID device. This
43
 *  descriptor is parsed by the host and its contents used to determine what data (and in what encoding)
44
 *  the device will send, and what it may be sent back from the host. Refer to the HID specification for
45
 *  more details on HID report descriptors.
46
 */
47
const USB_Descriptor_HIDReport_Datatype_t PROGMEM KeyboardReport[] =
48
{
49
	HID_RI_USAGE_PAGE(8, 0x01), /* Generic Desktop */
50
	HID_RI_USAGE(8, 0x06), /* Keyboard */
51
	HID_RI_COLLECTION(8, 0x01), /* Application */
52
	    HID_RI_USAGE_PAGE(8, 0x07), /* Key Codes */
53
	    HID_RI_USAGE_MINIMUM(8, 0xE0), /* Keyboard Left Control */
54
	    HID_RI_USAGE_MAXIMUM(8, 0xE7), /* Keyboard Right GUI */
55
	    HID_RI_LOGICAL_MINIMUM(8, 0x00),
56
	    HID_RI_LOGICAL_MAXIMUM(8, 0x01),
57
	    HID_RI_REPORT_SIZE(8, 0x01),
58
	    HID_RI_REPORT_COUNT(8, 0x08),
59
	    HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
60
	    HID_RI_REPORT_COUNT(8, 0x01),
61
	    HID_RI_REPORT_SIZE(8, 0x08),
62
	    HID_RI_INPUT(8, HID_IOF_CONSTANT),
63
	    HID_RI_USAGE_PAGE(8, 0x08), /* LEDs */
64
	    HID_RI_USAGE_MINIMUM(8, 0x01), /* Num Lock */
65
	    HID_RI_USAGE_MAXIMUM(8, 0x05), /* Kana */
66
	    HID_RI_REPORT_COUNT(8, 0x05),
67
	    HID_RI_REPORT_SIZE(8, 0x01),
68
	    HID_RI_OUTPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE | HID_IOF_NON_VOLATILE),
69
	    HID_RI_REPORT_COUNT(8, 0x01),
70
	    HID_RI_REPORT_SIZE(8, 0x03),
71
	    HID_RI_OUTPUT(8, HID_IOF_CONSTANT),
72
	    HID_RI_LOGICAL_MINIMUM(8, 0x00),
73
	    HID_RI_LOGICAL_MAXIMUM(8, 0x65),
74
	    HID_RI_USAGE_PAGE(8, 0x07), /* Keyboard */
75
	    HID_RI_USAGE_MINIMUM(8, 0x00), /* Reserved (no event indicated) */
76
	    HID_RI_USAGE_MAXIMUM(8, 0x65), /* Keyboard Application */
77
	    HID_RI_REPORT_COUNT(8, 0x06),
78
	    HID_RI_REPORT_SIZE(8, 0x08),
79
	    HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_ARRAY | HID_IOF_ABSOLUTE),
80
	HID_RI_END_COLLECTION(0),
81
};
82

  
83
/** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
84
 *  device characteristics, including the supported USB version, control endpoint size and the
85
 *  number of device configurations. The descriptor is read out by the USB host when the enumeration
86
 *  process begins.
87
 */
88
const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
89
{
90
	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
91

  
92
	.USBSpecification       = VERSION_BCD(01.10),
93
	.Class                  = USB_CSCP_NoDeviceClass,
94
	.SubClass               = USB_CSCP_NoDeviceSubclass,
95
	.Protocol               = USB_CSCP_NoDeviceProtocol,
96

  
97
	.Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
98

  
99
	.VendorID               = 0x03EB,
100
	.ProductID              = 0x2042,
101
	.ReleaseNumber          = VERSION_BCD(00.01),
102

  
103
	.ManufacturerStrIndex   = 0x01,
104
	.ProductStrIndex        = 0x02,
105
	.SerialNumStrIndex      = NO_DESCRIPTOR,
106

  
107
	.NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
108
};
109

  
110
/** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
111
 *  of the device in one of its supported configurations, including information about any device interfaces
112
 *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
113
 *  a configuration so that the host may correctly communicate with the USB device.
114
 */
115
const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
116
{
117
	.Config =
118
		{
119
			.Header                 = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
120

  
121
			.TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),
122
			.TotalInterfaces        = 1,
123

  
124
			.ConfigurationNumber    = 1,
125
			.ConfigurationStrIndex  = NO_DESCRIPTOR,
126

  
127
			.ConfigAttributes       = (USB_CONFIG_ATTR_BUSPOWERED | USB_CONFIG_ATTR_SELFPOWERED),
128

  
129
			.MaxPowerConsumption    = USB_CONFIG_POWER_MA(100)
130
		},
131

  
132
	.HID_Interface =
133
		{
134
			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
135

  
136
			.InterfaceNumber        = 0x00,
137
			.AlternateSetting       = 0x00,
138

  
139
			.TotalEndpoints         = 2,
140

  
141
			.Class                  = HID_CSCP_HIDClass,
142
			.SubClass               = HID_CSCP_BootSubclass,
143
			.Protocol               = HID_CSCP_KeyboardBootProtocol,
144

  
145
			.InterfaceStrIndex      = NO_DESCRIPTOR
146
		},
147

  
148
	.HID_KeyboardHID =
149
		{
150
			.Header                 = {.Size = sizeof(USB_HID_Descriptor_HID_t), .Type = HID_DTYPE_HID},
151

  
152
			.HIDSpec                = VERSION_BCD(01.11),
153
			.CountryCode            = 0x00,
154
			.TotalReportDescriptors = 1,
155
			.HIDReportType          = HID_DTYPE_Report,
156
			.HIDReportLength        = sizeof(KeyboardReport)
157
		},
158

  
159
	.HID_ReportINEndpoint =
160
		{
161
			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
162

  
163
			.EndpointAddress        = (ENDPOINT_DIR_IN | KEYBOARD_IN_EPNUM),
164
			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
165
			.EndpointSize           = KEYBOARD_EPSIZE,
166
			.PollingIntervalMS      = 0x01
167
		},
168

  
169
	.HID_ReportOUTEndpoint =
170
		{
171
			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
172

  
173
			.EndpointAddress        = (ENDPOINT_DIR_OUT | KEYBOARD_OUT_EPNUM),
174
			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
175
			.EndpointSize           = KEYBOARD_EPSIZE,
176
			.PollingIntervalMS      = 0x01
177
		}
178
};
179

  
180
/** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
181
 *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
182
 *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
183
 */
184
const USB_Descriptor_String_t PROGMEM LanguageString =
185
{
186
	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
187

  
188
	.UnicodeString          = {LANGUAGE_ID_ENG}
189
};
190

  
191
/** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
192
 *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
193
 *  Descriptor.
194
 */
195
const USB_Descriptor_String_t PROGMEM ManufacturerString =
196
{
197
	.Header                 = {.Size = USB_STRING_LEN(8), .Type = DTYPE_String},
198

  
199
	.UnicodeString          = L"imp tech"
200
};
201

  
202
/** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
203
 *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
204
 *  Descriptor.
205
 */
206
const USB_Descriptor_String_t PROGMEM ProductString =
207
{
208
	.Header                 = {.Size = USB_STRING_LEN(10), .Type = DTYPE_String},
209

  
210
	.UnicodeString          = L"tasta v0.2"
211
};
212

  
213
/** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
214
 *  documentation) by the application code so that the address and size of a requested descriptor can be given
215
 *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
216
 *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
217
 *  USB host.
218
 */
219
uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
220
                                    const uint8_t wIndex,
221
                                    const void** const DescriptorAddress)
222
{
223
	const uint8_t  DescriptorType   = (wValue >> 8);
224
	const uint8_t  DescriptorNumber = (wValue & 0xFF);
225

  
226
	const void* Address = NULL;
227
	uint16_t    Size    = NO_DESCRIPTOR;
228

  
229
	switch (DescriptorType)
230
	{
231
		case DTYPE_Device:
232
			Address = &DeviceDescriptor;
233
			Size    = sizeof(USB_Descriptor_Device_t);
234
			break;
235
		case DTYPE_Configuration:
236
			Address = &ConfigurationDescriptor;
237
			Size    = sizeof(USB_Descriptor_Configuration_t);
238
			break;
239
		case DTYPE_String:
240
			switch (DescriptorNumber)
241
			{
242
				case 0x00:
243
					Address = &LanguageString;
244
					Size    = pgm_read_byte(&LanguageString.Header.Size);
245
					break;
246
				case 0x01:
247
					Address = &ManufacturerString;
248
					Size    = pgm_read_byte(&ManufacturerString.Header.Size);
249
					break;
250
				case 0x02:
251
					Address = &ProductString;
252
					Size    = pgm_read_byte(&ProductString.Header.Size);
253
					break;
254
			}
255

  
256
			break;
257
		case HID_DTYPE_HID:
258
			Address = &ConfigurationDescriptor.HID_KeyboardHID;
259
			Size    = sizeof(USB_HID_Descriptor_HID_t);
260
			break;
261
		case HID_DTYPE_Report:
262
			Address = &KeyboardReport;
263
			Size    = sizeof(KeyboardReport);
264
			break;
265
	}
266

  
267
	*DescriptorAddress = Address;
268
	return Size;
269
}
270

  

Also available in: Unified diff