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_t Keyboard_MIDI_Interface =
  44         {
  45                 .StreamingInterfaceNumber = 1,
  46
  47                 .DataINEndpointNumber     = MIDI_STREAM_IN_EPNUM,
  48                 .DataINEndpointSize       = MIDI_STREAM_EPSIZE,
  49
  50                 .DataOUTEndpointNumber    = MIDI_STREAM_OUT_EPNUM,
  51                 .DataOUTEndpointSize      = MIDI_STREAM_EPSIZE,
  52         };
  53
  54 /** Main program entry point. This routine contains the overall program flow, including initial
  55  *  setup of all components and the main program loop.
  56  */
  57 int main(void)
  58 {
  59         SetupHardware();
  60
  61         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  62
  63         for (;;)
  64         {
  65                 CheckJoystickMovement();
  66
  67                 USB_MIDI_EventPacket_t DummyMIDIEvent;
  68                 MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &DummyMIDIEvent);
  69
  70                 MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
  71                 USB_USBTask();
  72         }
  73 }
  74
  75 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  76 void SetupHardware(void)
  77 {
  78         /* Disable watchdog if enabled by bootloader/fuses */
  79         MCUSR &= ~(1 << WDRF);
  80         wdt_disable();
  81
  82         /* Disable clock division */
  83         clock_prescale_set(clock_div_1);
  84
  85         /* Hardware Initialization */
  86         Joystick_Init();
  87         LEDs_Init();
  88         Buttons_Init();
  89         USB_Init();
  90 }
  91
  92 /** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
  93 void CheckJoystickMovement(void)
  94 {
  95         static uint8_t PrevJoystickStatus;
  96
  97         uint8_t MIDICommand = 0;
  98         uint8_t MIDIPitch;
  99
 100         /* Get current joystick mask, XOR with previous to detect joystick changes */
 101         uint8_t JoystickStatus  = Joystick_GetStatus();
 102         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 103
 104         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 105         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 106
 107         if (JoystickChanges & JOY_LEFT)
 108         {
 109                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 110                 MIDIPitch   = 0x3C;
 111         }
 112
 113         if (JoystickChanges & JOY_UP)
 114         {
 115                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 116                 MIDIPitch   = 0x3D;
 117         }
 118
 119         if (JoystickChanges & JOY_RIGHT)
 120         {
 121                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 122                 MIDIPitch   = 0x3E;
 123         }
 124
 125         if (JoystickChanges & JOY_DOWN)
 126         {
 127                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 128                 MIDIPitch   = 0x3F;
 129         }
 130
 131         if (JoystickChanges & JOY_PRESS)
 132         {
 133                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 134                 MIDIPitch   = 0x3B;
 135         }
 136
 137         if (MIDICommand)
 138         {
 139                 USB_MIDI_EventPacket_t MIDIEvent = (USB_MIDI_EventPacket_t)
 140                         {
 141                                 .CableNumber = 0,
 142                                 .Command     = MIDICommand,
 143
 144                                 .Data1       = (MIDICommand << 4) | Channel,
 145                                 .Data2       = MIDIPitch,
 146                                 .Data3       = MIDI_STANDARD_VELOCITY,
 147                         };
 148
 149                 MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 150         }
 151
 152         PrevJoystickStatus = JoystickStatus;
 153 }
 154
 155 /** Event handler for the library USB Connection event. */
 156 void EVENT_USB_Connect(void)
 157 {
 158         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 159 }
 160
 161 /** Event handler for the library USB Disconnection event. */
 162 void EVENT_USB_Disconnect(void)
 163 {
 164         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 165 }
 166
 167 /** Event handler for the library USB Configuration Changed event. */
 168 void EVENT_USB_ConfigurationChanged(void)
 169 {
 170         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 171
 172         if (!(MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface)))
 173           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 174 }
 175
 176 /** Event handler for the library USB Unhandled Control Packet event. */
 177 void EVENT_USB_UnhandledControlPacket(void)
 178 {
 179         MIDI_Device_ProcessControlPacket(&Keyboard_MIDI_Interface);
 180 }