MIDI.c 5.47 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
55
56
57
58
59
				.DataOUTEndpointNumber    = MIDI_STREAM_OUT_EPNUM,
				.DataOUTEndpointSize      = MIDI_STREAM_EPSIZE,
			},
			
		.State =
			{
				// Leave all state values to their defaults			
			}
60
	};
61
62
63
64

/** Main program entry point. This routine contains the overall program flow, including initial
 *  setup of all components and the main program loop.
 */
65
int main(void)
66
67
68
69
70
71
72
73
{
	SetupHardware();

	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
	
	for (;;)
	{
		CheckJoystickMovement();
74
75
		
		USB_MIDI_EventPacket_t DummyMIDIEvent;
76
		MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &DummyMIDIEvent);
77
	
78
		MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
79
80
81
82
		USB_USBTask();
	}
}

83
/** Configures the board hardware and chip peripherals for the demo's functionality. */
84
void SetupHardware(void)
85
86
87
88
89
{
	/* Disable watchdog if enabled by bootloader/fuses */
	MCUSR &= ~(1 << WDRF);
	wdt_disable();

90
91
	/* Disable clock division */
	clock_prescale_set(clock_div_1);
92
93
94
95
	
	/* Hardware Initialization */
	Joystick_Init();
	LEDs_Init();
96
	Buttons_Init();
97
98
99
	USB_Init();
}

100
/** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
101
void CheckJoystickMovement(void)
102
103
104
{
	static uint8_t PrevJoystickStatus;

105
106
107
108
109
110
	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);
111
		
112
113
	/* 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));
114

115
116
117
118
	if (JoystickChanges & JOY_LEFT)
	{
		MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3C;
119
120
	}

121
122
123
124
125
	if (JoystickChanges & JOY_UP)
	{
		MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3D;
	}
126

127
128
129
130
131
	if (JoystickChanges & JOY_RIGHT)
	{
		MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3E;
	}
132
	
133
134
135
136
137
138
139
	if (JoystickChanges & JOY_DOWN)
	{
		MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3F;
	}

	if (JoystickChanges & JOY_PRESS)
140
	{
141
142
		MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
		MIDIPitch   = 0x3B;
143
144
	}
	
145
146
147
148
149
	if (MIDICommand)
	{
		USB_MIDI_EventPacket_t MIDIEvent = (USB_MIDI_EventPacket_t)
			{
				.CableNumber = 0,
150
				.Command     = (MIDICommand >> 4),
151
				
152
				.Data1       = MIDICommand | Channel,
153
154
155
156
				.Data2       = MIDIPitch,
				.Data3       = MIDI_STANDARD_VELOCITY,			
			};
			
157
		MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
158
159
160
	}

	PrevJoystickStatus = JoystickStatus;
161
162
}

163
/** Event handler for the library USB Connection event. */
164
void EVENT_USB_Connect(void)
165
{
166
167
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
}
168

169
/** Event handler for the library USB Disconnection event. */
170
171
172
173
void EVENT_USB_Disconnect(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
}
174

175
/** Event handler for the library USB Configuration Changed event. */
176
177
178
void EVENT_USB_ConfigurationChanged(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_READY);
179
	
180
	if (!(MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface)))
181
	  LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
182
}
183
184
185
186

/** Event handler for the library USB Unhandled Control Packet event. */
void EVENT_USB_UnhandledControlPacket(void)
{
187
	MIDI_Device_ProcessControlPacket(&Keyboard_MIDI_Interface);
188
}