Mouse.c 14.9 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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
/*
             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.
*/

/** \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"

/* Project Tags, for reading out using the ButtLoad project */
BUTTLOADTAG(ProjName,    "LUFA Mouse App");
BUTTLOADTAG(BuildTime,   __TIME__);
BUTTLOADTAG(BuildDate,   __DATE__);
BUTTLOADTAG(LUFAVersion, "LUFA V" LUFA_VERSION_STRING);

/* Scheduler Task List */
TASK_LIST
{
48
	#if !defined(INTERRUPT_CONTROL_ENDPOINT)
49
	{ Task: USB_USBTask          , TaskStatus: TASK_STOP },
50
51
52
	#endif
	
	#if !defined(INTERRUPT_DATA_ENDPOINT)
53
	{ Task: USB_Mouse_Report     , TaskStatus: TASK_STOP },
54
	#endif
55
56
57
58
59
60
61
62
63
64
65
66
67
68
};

/* Global Variables */
/** 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).
 */
uint8_t IdleCount = 0;

/** Current Idle period remaining. When the IdleCount value is set, this tracks the remaining number of idle
69
 *  milliseconds. This is separate to the IdleCount timer and is incremented and compared as the host may request 
70
71
72
73
74
75
76
77
78
79
80
81
82
83
 *  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
 *  starts the scheduler to run the application tasks.
 */
int main(void)
{
	/* Disable watchdog if enabled by bootloader/fuses */
	MCUSR &= ~(1 << WDRF);
	wdt_disable();

84
85
	/* Disable clock division */
	clock_prescale_set(clock_div_1);
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115

	/* Hardware Initialization */
	Joystick_Init();
	LEDs_Init();
	HWB_Init();
	
	/* Millisecond timer initialization, with output compare interrupt enabled for the idle timing */
	OCR0A  = 0x7D;
	TCCR0A = (1 << WGM01);
	TCCR0B = ((1 << CS01) | (1 << CS00));
	TIMSK0 = (1 << OCIE0A);

	/* Indicate USB not ready */
	UpdateStatus(Status_USBNotReady);
	
	/* Initialize Scheduler so that it can be used */
	Scheduler_Init();

	/* Initialize USB Subsystem */
	USB_Init();

	/* Scheduling - routine never returns, so put this last in the main function */
	Scheduler_Start();
}

/** 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.
 */
EVENT_HANDLER(USB_Connect)
{
116
	#if !defined(INTERRUPT_CONTROL_ENDPOINT)
117
118
	/* Start USB management task */
	Scheduler_SetTaskMode(USB_USBTask, TASK_RUN);
119
120
	#endif
	
121
122
	/* Indicate USB enumerating */
	UpdateStatus(Status_USBEnumerating);
123
124
125

	/* Default to report protocol on connect */
	UsingReportProtocol = true;
126
127
}

128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/** Event handler for the USB_Reset event. This fires when the USB interface is reset by the USB host, before the
 *  enumeration process begins, and enables the control endpoint interrupt so that control requests can be handled
 *  asynchronously when they arrive rather than when the control endpoint is polled manually.
 */
EVENT_HANDLER(USB_Reset)
{
	#if defined(INTERRUPT_CONTROL_ENDPOINT)
	/* Select the control endpoint */
	Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);

	/* Enable the endpoint SETUP interrupt ISR for the control endpoint */
	USB_INT_Enable(ENDPOINT_INT_SETUP);
	#endif
}

143
144
145
146
147
/** 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.
 */
EVENT_HANDLER(USB_Disconnect)
{
148
149
	/* Stop running keyboard reporting and USB management tasks */
	#if !defined(INTERRUPT_DATA_ENDPOINT)
150
	Scheduler_SetTaskMode(USB_Mouse_Report, TASK_STOP);
151
152
153
	#endif

	#if !defined(INTERRUPT_CONTROL_ENDPOINT)
154
	Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);
155
	#endif
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170

	/* Indicate USB not ready */
	UpdateStatus(Status_USBNotReady);
}

/** 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.
 */ 
EVENT_HANDLER(USB_ConfigurationChanged)
{
	/* Setup Mouse Report Endpoint */
	Endpoint_ConfigureEndpoint(MOUSE_EPNUM, EP_TYPE_INTERRUPT,
		                       ENDPOINT_DIR_IN, MOUSE_EPSIZE,
	                           ENDPOINT_BANK_SINGLE);

171
172
173
174
175
	#if defined(INTERRUPT_DATA_ENDPOINT)
	/* Enable the endpoint IN interrupt ISR for the report endpoint */
	USB_INT_Enable(ENDPOINT_INT_IN);
	#endif

176
177
178
	/* Indicate USB connected and ready */
	UpdateStatus(Status_USBReady);

179
	#if !defined(INTERRUPT_DATA_ENDPOINT)
180
181
	/* Start running mouse reporting task */
	Scheduler_SetTaskMode(USB_Mouse_Report, TASK_RUN);
182
	#endif
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
}

/** Event handler for the USB_UnhandledControlPacket event. This is used to catch standard and class specific
 *  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.
 */
EVENT_HANDLER(USB_UnhandledControlPacket)
{
	/* Handle HID Class specific requests */
	switch (bRequest)
	{
		case REQ_GetReport:
			if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				USB_MouseReport_Data_t MouseReportData;

				/* Create the next mouse report for transmission to the host */
200
				CreateMouseReport(&MouseReportData);
201
202
203
204
205
206
207
208
209
210
211
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

				/* Ignore report type and ID number value */
				Endpoint_Discard_Word();
				
				/* Ignore unused Interface number value */
				Endpoint_Discard_Word();

				/* Read in the number of bytes in the report to send to the host */
				uint16_t wLength = Endpoint_Read_Word_LE();
				
				/* If trying to send more bytes than exist to the host, clamp the value at the report size */
				if (wLength > sizeof(MouseReportData))
				  wLength = sizeof(MouseReportData);

				Endpoint_ClearSetupReceived();
	
				/* Write the report data to the control endpoint */
				Endpoint_Write_Control_Stream_LE(&MouseReportData, wLength);
				
				/* 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_ClearSetupOUT();
			}
		
			break;
		case REQ_GetProtocol:
			if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSetupReceived();
				
				/* Write the current protocol flag to the host */
				Endpoint_Write_Byte(UsingReportProtocol);
				
				/* Send the flag to the host */
				Endpoint_ClearSetupIN();
238
239
240
241

				/* Acknowledge status stage */
				while (!(Endpoint_IsSetupOUTReceived()));
				Endpoint_ClearSetupOUT();
242
243
244
245
246
247
248
249
250
251
252
253
254
255
			}
			
			break;
		case REQ_SetProtocol:
			if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				/* Read in the wValue parameter containing the new protocol mode */
				uint16_t wValue = Endpoint_Read_Word_LE();
				
				Endpoint_ClearSetupReceived();
				
				/* Set or clear the flag depending on what the host indicates that the current Protocol should be */
				UsingReportProtocol = (wValue != 0x0000);
				
256
257
				/* Acknowledge status stage */
				while (!(Endpoint_IsSetupINReady()));
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
				Endpoint_ClearSetupIN();
			}
			
			break;
		case REQ_SetIdle:
			if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				/* Read in the wValue parameter containing the idle period */
				uint16_t wValue = Endpoint_Read_Word_LE();
				
				Endpoint_ClearSetupReceived();
				
				/* Get idle period in MSB */
				IdleCount = (wValue >> 8);
				
273
274
				/* Acknowledge status stage */
				while (!(Endpoint_IsSetupINReady()));
275
276
277
278
279
280
281
282
283
284
285
286
287
288
				Endpoint_ClearSetupIN();
			}
			
			break;
		case REQ_GetIdle:
			if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{		
				Endpoint_ClearSetupReceived();
				
				/* Write the current idle duration to the host */
				Endpoint_Write_Byte(IdleCount);
				
				/* Send the flag to the host */
				Endpoint_ClearSetupIN();
289
290
291
292

				/* Acknowledge status stage */
				while (!(Endpoint_IsSetupOUTReceived()));
				Endpoint_ClearSetupOUT();
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
			}

			break;
	}
}

/** ISR for the timer 0 compare vector. This ISR fires once each millisecond, and increments the
 *  scheduler elapsed idle period counter when the host has set an idle period.
 */
ISR(TIMER0_COMPA_vect, ISR_BLOCK)
{
	/* 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.
 *
 *  \param ReportData  Pointer to a HID report data structure to be filled
 */
313
void CreateMouseReport(USB_MouseReport_Data_t* ReportData)
314
{
315
	uint8_t JoyStatus_LCL = Joystick_GetStatus();
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
	
	/* 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;

	if (JoyStatus_LCL & JOY_RIGHT)
	  ReportData->X =  1;
	else if (JoyStatus_LCL & JOY_LEFT)
	  ReportData->X = -1;

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

337
338
339
/** Sends the next HID report to the host, via the keyboard data endpoint. */
static inline void SendNextReport(void)
{
340
341
342
	static USB_MouseReport_Data_t PrevMouseReportData;
	USB_MouseReport_Data_t        MouseReportData;
	bool                          SendReport = true;
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
	
	/* Create the next mouse report for transmission to the host */
	CreateMouseReport(&MouseReportData);
	
	/* Check if the idle period is set*/
	if (IdleCount)
	{
		/* Determine if the idle period has elapsed */
		if (!(IdleMSRemaining))
		{
			/* Reset the idle time remaining counter, must multiply by 4 to get the duration in milliseconds */
			IdleMSRemaining = (IdleCount << 2);		
		}
		else
		{
358
359
			/* Idle period not elapsed, indicate that a report must not be sent unless the report has changed */
			SendReport = (memcmp(&PrevMouseReportData, &MouseReportData, sizeof(USB_MouseReport_Data_t)) != 0);
360
361
		}
	}
362
363
364

	/* Save the current report data for later comparison to check for changes */
	PrevMouseReportData = MouseReportData;
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
	
	/* 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_ReadWriteAllowed() && SendReport)
	{
		/* Write Mouse Report Data */
		Endpoint_Write_Stream_LE(&MouseReportData, sizeof(MouseReportData));
		
		/* Finalize the stream transfer to send the last packet */
		Endpoint_ClearCurrentBank();
	}
}

380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to
 *  log to a serial port, or anything else that is suitable for status updates.
 *
 *  \param CurrentStatus  Current status of the system, from the Mouse_StatusCodes_t enum
 */
void UpdateStatus(uint8_t CurrentStatus)
{
	uint8_t LEDMask = LEDS_NO_LEDS;
	
	/* Set the LED mask to the appropriate LED mask based on the given status code */
	switch (CurrentStatus)
	{
		case Status_USBNotReady:
			LEDMask = (LEDS_LED1);
			break;
		case Status_USBEnumerating:
			LEDMask = (LEDS_LED1 | LEDS_LED2);
			break;
		case Status_USBReady:
			LEDMask = (LEDS_LED2 | LEDS_LED4);
			break;
	}
	
	/* Set the board LEDs to the new LED mask */
	LEDs_SetAllLEDs(LEDMask);
}

407
#if !defined(INTERRUPT_DATA_ENDPOINT)
408
409
410
/** Task to manage HID report generation and transmission to the host, when in report mode. */
TASK(USB_Mouse_Report)
{
411
412
	/* Check if the USB system is connected to a host */
	if (USB_IsConnected)
413
	{
414
415
		/* Send the next mouse report to the host */
		SendNextReport();
416
	}
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
}
#endif

/** ISR for the general Pipe/Endpoint interrupt vector. This ISR fires when an endpoint's status changes (such as
 *  a packet has been received) on an endpoint with its corresponding ISR enabling bits set. This is used to send
 *  HID packets to the host each time the HID interrupt endpoints polling period elapses, as managed by the USB
 *  controller. It is also used to respond to standard and class specific requests send to the device on the control
 *  endpoint, by handing them off to the LUFA library when they are received.
 */
ISR(ENDPOINT_PIPE_vect, ISR_BLOCK)
{
	#if defined(INTERRUPT_CONTROL_ENDPOINT)
	/* Check if the control endpoint has received a request */
	if (Endpoint_HasEndpointInterrupted(ENDPOINT_CONTROLEP))
	{
		/* Clear the endpoint interrupt */
		Endpoint_ClearEndpointInterrupt(ENDPOINT_CONTROLEP);

		/* Process the control request */
		USB_USBTask();

		/* Handshake the endpoint setup interrupt - must be after the call to USB_USBTask() */
		USB_INT_Clear(ENDPOINT_INT_SETUP);
	}
	#endif
442
	
443
444
445
	#if defined(INTERRUPT_DATA_ENDPOINT)
	/* Check if mouse endpoint has interrupted */
	if (Endpoint_HasEndpointInterrupted(MOUSE_EPNUM))
446
447
448
449
	{
		/* Select the Mouse Report Endpoint */
		Endpoint_SelectEndpoint(MOUSE_EPNUM);

450
451
452
453
454
455
456
457
		/* Clear the endpoint IN interrupt flag */
		USB_INT_Clear(ENDPOINT_INT_IN);

		/* Clear the Mouse Report endpoint interrupt and select the endpoint */
		Endpoint_ClearEndpointInterrupt(MOUSE_EPNUM);

		/* Send the next mouse report to the host */
		SendNextReport();
458
	}
459
	#endif
460
}