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                 .State =
  57                         {
  58                                 // Leave all state values to their defaults
  59                         }
  60         };
  61
  62 /** Main program entry point. This routine contains the overall program flow, including initial
  63  *  setup of all components and the main program loop.
  64  */
  65 int main(void)
  66 {
  67         SetupHardware();
  68
  69         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  70
  71         for (;;)
  72         {
  73                 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                 USB_USBTask();
  80         }
  81 }
  82
  83 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  84 void SetupHardware(void)
  85 {
  86         /* Disable watchdog if enabled by bootloader/fuses */
  87         MCUSR &= ~(1 << WDRF);
  88         wdt_disable();
  89
  90         /* Disable clock division */
  91         clock_prescale_set(clock_div_1);
  92
  93         /* Hardware Initialization */
  94         Joystick_Init();
  95         LEDs_Init();
  96         Buttons_Init();
  97         USB_Init();
  98 }
  99
 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         static uint8_t PrevJoystickStatus;
 104
 105         uint8_t MIDICommand = 0;
 106         uint8_t MIDIPitch;
 107
 108         /* Get current joystick mask, XOR with previous to detect joystick changes */
 109         uint8_t JoystickStatus  = Joystick_GetStatus();
 110         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 111
 112         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 113         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 114
 115         if (JoystickChanges & JOY_LEFT)
 116         {
 117                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 118                 MIDIPitch   = 0x3C;
 119         }
 120
 121         if (JoystickChanges & JOY_UP)
 122         {
 123                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 124                 MIDIPitch   = 0x3D;
 125         }
 126
 127         if (JoystickChanges & JOY_RIGHT)
 128         {
 129                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 130                 MIDIPitch   = 0x3E;
 131         }
 132
 133         if (JoystickChanges & JOY_DOWN)
 134         {
 135                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 136                 MIDIPitch   = 0x3F;
 137         }
 138
 139         if (JoystickChanges & JOY_PRESS)
 140         {
 141                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 142                 MIDIPitch   = 0x3B;
 143         }
 144
 145         if (MIDICommand)
 146         {
 147                 USB_MIDI_EventPacket_t MIDIEvent = (USB_MIDI_EventPacket_t)
 148                         {
 149                                 .CableNumber = 0,
 150                                 .Command     = (MIDICommand >> 4),
 151
 152                                 .Data1       = MIDICommand | Channel,
 153                                 .Data2       = MIDIPitch,
 154                                 .Data3       = MIDI_STANDARD_VELOCITY,
 155                         };
 156
 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         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 167 }
 168
 169 /** Event handler for the library USB Disconnection event. */
 170 void EVENT_USB_Disconnect(void)
 171 {
 172         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 173 }
 174
 175 /** Event handler for the library USB Configuration Changed event. */
 176 void EVENT_USB_ConfigurationChanged(void)
 177 {
 178         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 179
 180         if (!(MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface)))
 181           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 182 }
 183
 184 /** Event handler for the library USB Unhandled Control Packet event. */
 185 void EVENT_USB_UnhandledControlPacket(void)
 186 {
 187         MIDI_Device_ProcessControlPacket(&Keyboard_MIDI_Interface);
 188 }