GenericHID.c 5.8 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
/*
             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.
*/

31
32
33
34
35
36
/** \file
 *
 *  Main source file for the GenericHID demo. This file contains the main tasks of
 *  the demo and is responsible for the initial application hardware configuration.
 */

37
38
#include "GenericHID.h"

39
40
41
/** Buffer to hold the previously generated HID report, for comparison purposes inside the HID class driver. */
uint8_t PrevHIDReportBuffer[GENERIC_REPORT_SIZE];

42
43
44
45
46
47
48
49
/** Structure to contain reports from the host, so that they can be echoed back upon request */
struct
{
	uint8_t ReportID;
	uint16_t ReportSize;
	uint8_t ReportData[GENERIC_REPORT_SIZE];
} HIDReportEcho;

50
51
52
53
/** LUFA HID Class driver interface configuration and state information. This structure is
 *  passed to all HID Class driver functions, so that multiple instances of the same class
 *  within a device can be differentiated from one another.
 */
54
USB_ClassInfo_HID_Device_t Generic_HID_Interface =
55
	{
56
57
58
59
60
61
		.Config =
			{
				.InterfaceNumber         = 0,

				.ReportINEndpointNumber  = GENERIC_IN_EPNUM,
				.ReportINEndpointSize    = GENERIC_EPSIZE,
62
63
64
				
				.PrevReportINBuffer      = PrevHIDReportBuffer,
				.PrevReportINBufferSize  = sizeof(PrevHIDReportBuffer),
65
			},
66
	};
67

68
69
70
/** Main program entry point. This routine contains the overall program flow, including initial
 *  setup of all components and the main program loop.
 */
71
int main(void)
72
73
74
75
76
77
78
{
	SetupHardware();
	
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
	
	for (;;)
	{
79
		HID_Device_USBTask(&Generic_HID_Interface);
80
81
82
83
		USB_USBTask();
	}
}

84
/** Configures the board hardware and chip peripherals for the demo's functionality. */
85
void SetupHardware(void)
86
87
88
89
90
91
92
93
{
	/* Disable watchdog if enabled by bootloader/fuses */
	MCUSR &= ~(1 << WDRF);
	wdt_disable();

	/* Disable clock division */
	clock_prescale_set(clock_div_1);

94
95
	/* Hardware Initialization */
	LEDs_Init();
96
97
98
	USB_Init();
}

99
/** Event handler for the library USB Connection event. */
100
void EVENT_USB_Device_Connect(void)
101
{
102
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);	
103
104
}

105
/** Event handler for the library USB Disconnection event. */
106
void EVENT_USB_Device_Disconnect(void)
107
{
108
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
109
110
}

111
/** Event handler for the library USB Configuration Changed event. */
112
void EVENT_USB_Device_ConfigurationChanged(void)
113
{
114
	LEDs_SetAllLEDs(LEDMASK_USB_READY);
115

116
	if (!(HID_Device_ConfigureEndpoints(&Generic_HID_Interface)))
117
	  LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
118
119

	USB_Device_EnableSOFEvents();
120
121
}

122
123
/** Event handler for the library USB Unhandled Control Request event. */
void EVENT_USB_Device_UnhandledControlRequest(void)
124
{
125
	HID_Device_ProcessControlRequest(&Generic_HID_Interface);
126
127
}

128
129
/** Event handler for the USB device Start Of Frame event. */
void EVENT_USB_Device_StartOfFrame(void)
130
{
131
	HID_Device_MillisecondElapsed(&Generic_HID_Interface);
132
133
}

134
135
/** HID class driver callback function for the creation of HID reports to the host.
 *
136
137
138
 *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 *  \param[in,out] ReportID  Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID
 *  \param[out] ReportData  Pointer to a buffer where the created report should be stored
139
 *  \param[out] ReportSize  Number of bytes written in the report (or zero if no report is to be sent
140
 *
141
 *  \return Boolean true to force the sending of the report, false to let the library determine if it needs to be sent
142
 */
143
144
bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,
                                         void* ReportData, uint16_t* ReportSize)
145
{
146
147
148
149
	if (HIDReportEcho.ReportID)
	  *ReportID = HIDReportEcho.ReportID;

	memcpy(ReportData, HIDReportEcho.ReportData, HIDReportEcho.ReportSize);
150
	
151
	*ReportSize = HIDReportEcho.ReportSize;
152
	return true;
153
154
}

155
156
/** HID class driver callback function for the processing of HID reports from the host.
 *
157
158
159
160
 *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 *  \param[in] ReportID  Report ID of the received report from the host
 *  \param[in] ReportData  Pointer to a buffer where the created report has been stored
 *  \param[in] ReportSize  Size in bytes of the received HID report
161
 */
162
163
void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, const uint8_t ReportID,
                                          const void* ReportData, const uint16_t ReportSize)
164
{
165
166
167
	HIDReportEcho.ReportID   = ReportID;
	HIDReportEcho.ReportSize = ReportSize;
	memcpy(HIDReportEcho.ReportData, ReportData, ReportSize);
168
}