Demos/Device/ClassDriver/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 /** \file
  32  *
  33  *  Main source file for the MIDI demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "MIDI.h"
  38
  39 /** LUFA MIDI Class driver interface configuration and state information. This structure is
  40  *  passed to all MIDI Class driver functions, so that multiple instances of the same class
  41  *  within a device can be differentiated from one another.
  42  */
  43 USB_ClassInfo_MIDI_Device_t Keyboard_MIDI_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .StreamingInterfaceNumber = 1,
  48
  49                                 .DataINEndpointNumber     = MIDI_STREAM_IN_EPNUM,
  50                                 .DataINEndpointSize       = MIDI_STREAM_EPSIZE,
  51
  52                                 .DataOUTEndpointNumber    = MIDI_STREAM_OUT_EPNUM,
  53                                 .DataOUTEndpointSize      = MIDI_STREAM_EPSIZE,
  54                         },
  55         };
  56
  57 /** Main program entry point. This routine contains the overall program flow, including initial
  58  *  setup of all components and the main program loop.
  59  */
  60 int main(void)
  61 {
  62         SetupHardware();
  63
  64         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  65
  66         for (;;)
  67         {
  68                 CheckJoystickMovement();
  69
  70                 /* Must acknowedge MIDI packets from the host even though they aren't used, or the host locks up */
  71                 MIDI_EventPacket_t DummyMIDIEvent;
  72                 MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &DummyMIDIEvent);
  73
  74                 MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
  75                 USB_USBTask();
  76         }
  77 }
  78
  79 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  80 void SetupHardware(void)
  81 {
  82         /* Disable watchdog if enabled by bootloader/fuses */
  83         MCUSR &= ~(1 << WDRF);
  84         wdt_disable();
  85
  86         /* Disable clock division */
  87         clock_prescale_set(clock_div_1);
  88
  89         /* Hardware Initialization */
  90         Joystick_Init();
  91         LEDs_Init();
  92         Buttons_Init();
  93         USB_Init();
  94 }
  95
  96 /** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
  97 void CheckJoystickMovement(void)
  98 {
  99         static uint8_t PrevJoystickStatus;
 100
 101         uint8_t MIDICommand = 0;
 102         uint8_t MIDIPitch;
 103
 104         /* Get current joystick mask, XOR with previous to detect joystick changes */
 105         uint8_t JoystickStatus  = Joystick_GetStatus();
 106         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 107
 108         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 109         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 110
 111         if (JoystickChanges & JOY_LEFT)
 112         {
 113                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 114                 MIDIPitch   = 0x3C;
 115         }
 116
 117         if (JoystickChanges & JOY_UP)
 118         {
 119                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 120                 MIDIPitch   = 0x3D;
 121         }
 122
 123         if (JoystickChanges & JOY_RIGHT)
 124         {
 125                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 126                 MIDIPitch   = 0x3E;
 127         }
 128
 129         if (JoystickChanges & JOY_DOWN)
 130         {
 131                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 132                 MIDIPitch   = 0x3F;
 133         }
 134
 135         if (JoystickChanges & JOY_PRESS)
 136         {
 137                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 138                 MIDIPitch   = 0x3B;
 139         }
 140
 141         if (MIDICommand)
 142         {
 143                 MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 144                         {
 145                                 .CableNumber = 0,
 146                                 .Command     = (MIDICommand >> 4),
 147
 148                                 .Data1       = MIDICommand | Channel,
 149                                 .Data2       = MIDIPitch,
 150                                 .Data3       = MIDI_STANDARD_VELOCITY,
 151                         };
 152
 153                 MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 154         }
 155
 156         PrevJoystickStatus = JoystickStatus;
 157 }
 158
 159 /** Event handler for the library USB Connection event. */
 160 void EVENT_USB_Connect(void)
 161 {
 162         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 163 }
 164
 165 /** Event handler for the library USB Disconnection event. */
 166 void EVENT_USB_Disconnect(void)
 167 {
 168         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 169 }
 170
 171 /** Event handler for the library USB Configuration Changed event. */
 172 void EVENT_USB_ConfigurationChanged(void)
 173 {
 174         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 175
 176         if (!(MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface)))
 177           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 178 }
 179
 180 /** Event handler for the library USB Unhandled Control Packet event. */
 181 void EVENT_USB_UnhandledControlPacket(void)
 182 {
 183         MIDI_Device_ProcessControlPacket(&Keyboard_MIDI_Interface);
 184 }