MIDI.c 5.38 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 MIDI demo. This file contains the main tasks of
 *  the demo and is responsible for the initial application hardware configuration.
 */

37
38
#include "MIDI.h"

39
40
41
42
/** LUFA MIDI Class driver interface configuration and state information. This structure is
 *  passed to all MIDI Class driver functions, so that multiple instances of the same class
 *  within a device can be differentiated from one another.
 */
43
USB_ClassInfo_MIDI_Device_t Keyboard_MIDI_Interface =
44
	{
45
46
47
		.Config =
			{
				.StreamingInterfaceNumber = 1,
48

49
50
				.DataINEndpointNumber     = MIDI_STREAM_IN_EPNUM,
				.DataINEndpointSize       = MIDI_STREAM_EPSIZE,
51

52
53
54
				.DataOUTEndpointNumber    = MIDI_STREAM_OUT_EPNUM,
				.DataOUTEndpointSize      = MIDI_STREAM_EPSIZE,
			},
55
	};
56
57
58
59

/** Main program entry point. This routine contains the overall program flow, including initial
 *  setup of all components and the main program loop.
 */
60
int main(void)
61
62
63
64
65
66
67
68
{
	SetupHardware();

	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
	
	for (;;)
	{
		CheckJoystickMovement();
69
		
70
		MIDI_EventPacket_t DummyMIDIEvent;
71
		MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &DummyMIDIEvent);
72
	
73
		MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
74
75
76
77
		USB_USBTask();
	}
}

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

85
86
	/* Disable clock division */
	clock_prescale_set(clock_div_1);
87
88
89
90
	
	/* Hardware Initialization */
	Joystick_Init();
	LEDs_Init();
91
	Buttons_Init();
92
93
94
	USB_Init();
}

95
/** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
96
void CheckJoystickMovement(void)
97
98
99
{
	static uint8_t PrevJoystickStatus;

100
101
102
103
104
105
	uint8_t MIDICommand = 0;
	uint8_t MIDIPitch;
	
	/* Get current joystick mask, XOR with previous to detect joystick changes */
	uint8_t JoystickStatus  = Joystick_GetStatus();
	uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
106
		
107
108
	/* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
	uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
109

110
111
112
113
	if (JoystickChanges & JOY_LEFT)
	{
		MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3C;
114
115
	}

116
117
118
119
120
	if (JoystickChanges & JOY_UP)
	{
		MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3D;
	}
121

122
123
124
125
126
	if (JoystickChanges & JOY_RIGHT)
	{
		MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3E;
	}
127
	
128
129
130
131
132
133
134
	if (JoystickChanges & JOY_DOWN)
	{
		MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3F;
	}

	if (JoystickChanges & JOY_PRESS)
135
	{
136
137
		MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3B;
138
139
	}
	
140
141
	if (MIDICommand)
	{
142
		MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
143
144
			{
				.CableNumber = 0,
145
				.Command     = (MIDICommand >> 4),
146
				
147
				.Data1       = MIDICommand | Channel,
148
149
150
151
				.Data2       = MIDIPitch,
				.Data3       = MIDI_STANDARD_VELOCITY,			
			};
			
152
		MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
153
154
155
	}

	PrevJoystickStatus = JoystickStatus;
156
157
}

158
/** Event handler for the library USB Connection event. */
159
void EVENT_USB_Connect(void)
160
{
161
162
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
}
163

164
/** Event handler for the library USB Disconnection event. */
165
166
167
168
void EVENT_USB_Disconnect(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
}
169

170
/** Event handler for the library USB Configuration Changed event. */
171
172
173
void EVENT_USB_ConfigurationChanged(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_READY);
174
	
175
	if (!(MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface)))
176
	  LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
177
}
178
179
180
181

/** Event handler for the library USB Unhandled Control Packet event. */
void EVENT_USB_UnhandledControlPacket(void)
{
182
	MIDI_Device_ProcessControlPacket(&Keyboard_MIDI_Interface);
183
}