Mouse.c 10.1 KB
Newer Older
1
2
/*
             LUFA Library
Dean Camera's avatar
Dean Camera committed
3
     Copyright (C) Dean Camera, 2010.
4
5
6
7
8
9
              
  dean [at] fourwalledcubicle [dot] com
      www.fourwalledcubicle.com
*/

/*
Dean Camera's avatar
Dean Camera committed
10
  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
11

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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
  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.
*/

/** \file
 *
 *  Main source file for the Mouse demo. This file contains the main tasks of the demo and
 *  is responsible for the initial application hardware configuration.
 */
 
#include "Mouse.h"

/** Indicates what report mode the host has requested, true for normal HID reporting mode, false for special boot
 *  protocol reporting mode.
 */
bool UsingReportProtocol = true;

/** Current Idle period. This is set by the host via a Set Idle HID class request to silence the device's reports
 *  for either the entire idle duration, or until the report status changes (e.g. the user moves the mouse).
 */
uint16_t IdleCount = HID_IDLE_CHANGESONLY;

/** Current Idle period remaining. When the IdleCount value is set, this tracks the remaining number of idle
 *  milliseconds. This is separate to the IdleCount timer and is incremented and compared as the host may request 
 *  the current idle period via a Get Idle HID class request, thus its value must be preserved.
 */
uint16_t IdleMSRemaining = 0;


/** Main program entry point. This routine configures the hardware required by the application, then
57
 *  enters a loop to run the application tasks in sequence.
58
59
 */
int main(void)
60
61
62
63
64
65
66
67
68
69
70
71
72
73
{
	SetupHardware();
	
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);

	for (;;)
	{
		Mouse_Task();
		USB_USBTask();
	}
}

/** Configures the board hardware and chip peripherals for the demo's functionality. */
void SetupHardware(void)
74
75
76
77
78
79
80
81
82
83
84
85
{
	/* Disable watchdog if enabled by bootloader/fuses */
	MCUSR &= ~(1 << WDRF);
	wdt_disable();

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

	/* Hardware Initialization */
	Joystick_Init();
	LEDs_Init();
	Buttons_Init();
86
	USB_Init();
87
88
89
90
91
}

/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
 *  starts the library USB task to begin the enumeration and USB management process.
 */
92
void EVENT_USB_Device_Connect(void)
93
94
{
	/* Indicate USB enumerating */
95
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
96
97
98
99
100
101
102
103

	/* Default to report protocol on connect */
	UsingReportProtocol = true;
}

/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
 *  the status LEDs and stops the USB management and Mouse reporting tasks.
 */
104
void EVENT_USB_Device_Disconnect(void)
105
106
{
	/* Indicate USB not ready */
107
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
108
109
110
111
112
}

/** Event handler for the USB_ConfigurationChanged event. This is fired when the host sets the current configuration
 *  of the USB device after enumeration - the device endpoints are configured and the mouse reporting task started.
 */ 
113
void EVENT_USB_Device_ConfigurationChanged(void)
114
115
{
	/* Indicate USB connected and ready */
116
	LEDs_SetAllLEDs(LEDMASK_USB_READY);
117
118
119
120
121
122
123
124
	
	/* Setup Mouse Report Endpoint */
	if (!(Endpoint_ConfigureEndpoint(MOUSE_EPNUM, EP_TYPE_INTERRUPT,
		                             ENDPOINT_DIR_IN, MOUSE_EPSIZE,
	                                 ENDPOINT_BANK_SINGLE)))
	{
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
	}
125
126

	USB_Device_EnableSOFEvents();
127
128
}

129
/** Event handler for the USB_UnhandledControlRequest event. This is used to catch standard and class specific
130
131
132
 *  control requests that are not handled internally by the USB library (including the HID commands, which are
 *  all issued via the control endpoint), so that they can be handled appropriately for the application.
 */
133
void EVENT_USB_Device_UnhandledControlRequest(void)
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
{
	/* Handle HID Class specific requests */
	switch (USB_ControlRequest.bRequest)
	{
		case REQ_GetReport:
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				USB_MouseReport_Data_t MouseReportData;

				Endpoint_ClearSETUP();

				/* Create the next mouse report for transmission to the host */
				CreateMouseReport(&MouseReportData);
	
				/* Write the report data to the control endpoint */
				Endpoint_Write_Control_Stream_LE(&MouseReportData, sizeof(MouseReportData));
				
				/* Clear the report data afterwards */
				memset(&MouseReportData, 0, sizeof(MouseReportData));

				/* Finalize the stream transfer to send the last packet or clear the host abort */
				Endpoint_ClearOUT();
			}
		
			break;
		case REQ_GetProtocol:
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
				
				/* Write the current protocol flag to the host */
				Endpoint_Write_Byte(UsingReportProtocol);
				
				/* Send the flag to the host */
				Endpoint_ClearIN();

170
				Endpoint_ClearStatusStage();
171
172
173
174
175
176
177
178
179
180
181
			}
			
			break;
		case REQ_SetProtocol:
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
				
				/* Set or clear the flag depending on what the host indicates that the current Protocol should be */
				UsingReportProtocol = (USB_ControlRequest.wValue != 0);
				
182
				Endpoint_ClearStatusStage();
183
184
185
186
187
188
189
190
			}
			
			break;
		case REQ_SetIdle:
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
				
191
192
				/* Get idle period in MSB, must multiply by 4 to get the duration in milliseconds */
				IdleCount = ((USB_ControlRequest.wValue & 0xFF00) >> 6);
193
				
194
				Endpoint_ClearStatusStage();
195
196
197
198
199
200
201
202
			}
			
			break;
		case REQ_GetIdle:
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{		
				Endpoint_ClearSETUP();
				
203
204
				/* Write the current idle duration to the host, must be divided by 4 before sent to host */
				Endpoint_Write_Byte(IdleCount >> 2);
205
206
207
208
				
				/* Send the flag to the host */
				Endpoint_ClearIN();

209
				Endpoint_ClearStatusStage();
210
211
212
213
214
215
			}

			break;
	}
}

216
217
/** Event handler for the USB device Start Of Frame event. */
void EVENT_USB_Device_StartOfFrame(void)
218
219
220
221
222
223
224
225
{
	/* One millisecond has elapsed, decrement the idle time remaining counter if it has not already elapsed */
	if (IdleMSRemaining)
	  IdleMSRemaining--;
}

/** Fills the given HID report data structure with the next HID report to send to the host.
 *
226
 *  \param[out] ReportData  Pointer to a HID report data structure to be filled
227
228
229
230
231
232
233
234
235
236
237
238
239
240
 */
void CreateMouseReport(USB_MouseReport_Data_t* ReportData)
{
	uint8_t JoyStatus_LCL    = Joystick_GetStatus();
	uint8_t ButtonStatus_LCL = Buttons_GetStatus();
	
	/* Clear the report contents */
	memset(ReportData, 0, sizeof(USB_MouseReport_Data_t));

	if (JoyStatus_LCL & JOY_UP)
	  ReportData->Y = -1;
	else if (JoyStatus_LCL & JOY_DOWN)
	  ReportData->Y =  1;

241
	if (JoyStatus_LCL & JOY_LEFT)
242
	  ReportData->X = -1;
243
244
	else if (JoyStatus_LCL & JOY_RIGHT)
	  ReportData->X = 1;
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273

	if (JoyStatus_LCL & JOY_PRESS)
	  ReportData->Button  = (1 << 0);
	  
	if (ButtonStatus_LCL & BUTTONS_BUTTON1)
	  ReportData->Button |= (1 << 1);
}

/** Sends the next HID report to the host, via the keyboard data endpoint. */
void SendNextReport(void)
{
	static USB_MouseReport_Data_t PrevMouseReportData;
	USB_MouseReport_Data_t        MouseReportData;
	bool                          SendReport;
	
	/* Create the next mouse report for transmission to the host */
	CreateMouseReport(&MouseReportData);
	
	/* Check to see if the report data has changed - if so a report MUST be sent */
	SendReport = (memcmp(&PrevMouseReportData, &MouseReportData, sizeof(USB_MouseReport_Data_t)) != 0);
	
	/* Override the check if the Y or X values are non-zero - we want continuous movement while the joystick
	 * is being held down (via continuous reports), otherwise the cursor will only move once per joystick toggle */
	if ((MouseReportData.Y != 0) || (MouseReportData.X != 0))
	  SendReport = true;
	
	/* Check if the idle period is set and has elapsed */
	if ((IdleCount != HID_IDLE_CHANGESONLY) && (!(IdleMSRemaining)))
	{
274
275
		/* Reset the idle time remaining counter */
		IdleMSRemaining = IdleCount;
276
277
278
279
280
281
282
283
284
285
		
		/* Idle period is set and has elapsed, must send a report to the host */
		SendReport = true;
	}
	
	/* Select the Mouse Report Endpoint */
	Endpoint_SelectEndpoint(MOUSE_EPNUM);

	/* Check if Mouse Endpoint Ready for Read/Write and if we should send a new report */
	if (Endpoint_IsReadWriteAllowed() && SendReport)
286
287
288
289
	{	
		/* Save the current report data for later comparison to check for changes */
		PrevMouseReportData = MouseReportData;

290
291
292
293
294
295
296
297
298
		/* Write Mouse Report Data */
		Endpoint_Write_Stream_LE(&MouseReportData, sizeof(MouseReportData));
		
		/* Finalize the stream transfer to send the last packet */
		Endpoint_ClearIN();
	}
}

/** Task to manage HID report generation and transmission to the host, when in report mode. */
299
void Mouse_Task(void)
300
{
301
	/* Device must be connected and configured for the task to run */
302
	if (USB_DeviceState != DEVICE_STATE_Configured)
303
304
305
306
	  return;
	  
	/* Send the next mouse report to the host */
	SendNextReport();
307
}