Demos/Device/MIDI/MIDI.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #include "MIDI.h"
  32
  33 USB_ClassInfo_MIDI_t Keyboard_MIDI_Interface =
  34         {
  35                 .InterfaceNumber       = 0,
  36
  37                 .DataINEndpointNumber  = MIDI_STREAM_IN_EPNUM,
  38                 .DataINEndpointSize    = MIDI_STREAM_EPSIZE,
  39
  40                 .DataOUTEndpointNumber = MIDI_STREAM_OUT_EPNUM,
  41                 .DataOUTEndpointSize   = MIDI_STREAM_EPSIZE,
  42         };
  43
  44 int main(void)
  45 {
  46         SetupHardware();
  47
  48         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  49
  50         for (;;)
  51         {
  52                 CheckJoystickMovement();
  53
  54                 USB_USBTask();
  55         }
  56 }
  57
  58 void SetupHardware(void)
  59 {
  60         /* Disable watchdog if enabled by bootloader/fuses */
  61         MCUSR &= ~(1 << WDRF);
  62         wdt_disable();
  63
  64         /* Disable clock division */
  65         clock_prescale_set(clock_div_1);
  66
  67         /* Hardware Initialization */
  68         Joystick_Init();
  69         LEDs_Init();
  70         Buttons_Init();
  71         USB_Init();
  72 }
  73
  74 void CheckJoystickMovement(void)
  75 {
  76         static uint8_t PrevJoystickStatus;
  77
  78         uint8_t MIDICommand = 0;
  79         uint8_t MIDIPitch;
  80
  81         /* Get current joystick mask, XOR with previous to detect joystick changes */
  82         uint8_t JoystickStatus  = Joystick_GetStatus();
  83         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
  84
  85         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
  86         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
  87
  88         if (JoystickChanges & JOY_LEFT)
  89         {
  90                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
  91                 MIDIPitch   = 0x3C;
  92         }
  93
  94         if (JoystickChanges & JOY_UP)
  95         {
  96                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
  97                 MIDIPitch   = 0x3D;
  98         }
  99
 100         if (JoystickChanges & JOY_RIGHT)
 101         {
 102                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 103                 MIDIPitch   = 0x3E;
 104         }
 105
 106         if (JoystickChanges & JOY_DOWN)
 107         {
 108                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 109                 MIDIPitch   = 0x3F;
 110         }
 111
 112         if (JoystickChanges & JOY_PRESS)
 113         {
 114                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 115                 MIDIPitch   = 0x3B;
 116         }
 117
 118         if (MIDICommand)
 119         {
 120                 USB_MIDI_EventPacket_t MIDIEvent = (USB_MIDI_EventPacket_t)
 121                         {
 122                                 .CableNumber = 0,
 123                                 .Command     = MIDICommand,
 124
 125                                 .Data1       = (MIDICommand << 4) | Channel,
 126                                 .Data2       = MIDIPitch,
 127                                 .Data3       = MIDI_STANDARD_VELOCITY,
 128                         };
 129
 130                 USB_MIDI_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 131         }
 132
 133         PrevJoystickStatus = JoystickStatus;
 134 }
 135
 136 void EVENT_USB_Connect(void)
 137 {
 138         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 139 }
 140
 141 void EVENT_USB_Disconnect(void)
 142 {
 143         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 144 }
 145
 146 void EVENT_USB_ConfigurationChanged(void)
 147 {
 148         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 149
 150         if (!(USB_MIDI_ConfigureEndpoints(&Keyboard_MIDI_Interface)))
 151           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 152 }