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                                 .DataINEndpointDoubleBank  = false,
  52
  53                                 .DataOUTEndpointNumber     = MIDI_STREAM_OUT_EPNUM,
  54                                 .DataOUTEndpointSize       = MIDI_STREAM_EPSIZE,
  55                                 .DataOUTEndpointDoubleBank = false,
  56                         },
  57         };
  58
  59 /** Main program entry point. This routine contains the overall program flow, including initial
  60  *  setup of all components and the main program loop.
  61  */
  62 int main(void)
  63 {
  64         SetupHardware();
  65
  66         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  67
  68         for (;;)
  69         {
  70                 CheckJoystickMovement();
  71
  72                 MIDI_EventPacket_t ReceivedMIDIEvent;
  73                 if (MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &ReceivedMIDIEvent))
  74                 {
  75                         if (ReceivedMIDIEvent.Command == (MIDI_COMMAND_NOTE_ON >> 4))
  76                           LEDs_SetAllLEDs(ReceivedMIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2);
  77                         else
  78                           LEDs_SetAllLEDs(LEDS_NO_LEDS);
  79                 }
  80
  81                 MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
  82                 USB_USBTask();
  83         }
  84 }
  85
  86 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  87 void SetupHardware(void)
  88 {
  89         /* Disable watchdog if enabled by bootloader/fuses */
  90         MCUSR &= ~(1 << WDRF);
  91         wdt_disable();
  92
  93         /* Disable clock division */
  94         clock_prescale_set(clock_div_1);
  95
  96         /* Hardware Initialization */
  97         Joystick_Init();
  98         LEDs_Init();
  99         Buttons_Init();
 100         USB_Init();
 101 }
 102
 103 /** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
 104 void CheckJoystickMovement(void)
 105 {
 106         static uint8_t PrevJoystickStatus;
 107
 108         uint8_t MIDICommand = 0;
 109         uint8_t MIDIPitch;
 110
 111         /* Get current joystick mask, XOR with previous to detect joystick changes */
 112         uint8_t JoystickStatus  = Joystick_GetStatus();
 113         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 114
 115         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 116         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 117
 118         if (JoystickChanges & JOY_LEFT)
 119         {
 120                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 121                 MIDIPitch   = 0x3C;
 122         }
 123
 124         if (JoystickChanges & JOY_UP)
 125         {
 126                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 127                 MIDIPitch   = 0x3D;
 128         }
 129
 130         if (JoystickChanges & JOY_RIGHT)
 131         {
 132                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 133                 MIDIPitch   = 0x3E;
 134         }
 135
 136         if (JoystickChanges & JOY_DOWN)
 137         {
 138                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 139                 MIDIPitch   = 0x3F;
 140         }
 141
 142         if (JoystickChanges & JOY_PRESS)
 143         {
 144                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 145                 MIDIPitch   = 0x3B;
 146         }
 147
 148         if (MIDICommand)
 149         {
 150                 MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 151                         {
 152                                 .CableNumber = 0,
 153                                 .Command     = (MIDICommand >> 4),
 154
 155                                 .Data1       = MIDICommand | Channel,
 156                                 .Data2       = MIDIPitch,
 157                                 .Data3       = MIDI_STANDARD_VELOCITY,
 158                         };
 159
 160                 MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 161         }
 162
 163         PrevJoystickStatus = JoystickStatus;
 164 }
 165
 166 /** Event handler for the library USB Connection event. */
 167 void EVENT_USB_Device_Connect(void)
 168 {
 169         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 170 }
 171
 172 /** Event handler for the library USB Disconnection event. */
 173 void EVENT_USB_Device_Disconnect(void)
 174 {
 175         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 176 }
 177
 178 /** Event handler for the library USB Configuration Changed event. */
 179 void EVENT_USB_Device_ConfigurationChanged(void)
 180 {
 181         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 182
 183         if (!(MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface)))
 184           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 185 }
 186
 187 /** Event handler for the library USB Unhandled Control Request event. */
 188 void EVENT_USB_Device_UnhandledControlRequest(void)
 189 {
 190         MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface);
 191 }