Demos/Device/ClassDriver/MIDI/MIDI.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all 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
  60 /** Main program entry point. This routine contains the overall program flow, including initial
  61  *  setup of all components and the main program loop.
  62  */
  63 int main(void)
  64 {
  65         SetupHardware();
  66
  67         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  68         sei();
  69
  70         for (;;)
  71         {
  72                 CheckJoystickMovement();
  73
  74                 MIDI_EventPacket_t ReceivedMIDIEvent;
  75                 while (MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &ReceivedMIDIEvent))
  76                 {
  77                         if ((ReceivedMIDIEvent.Command == (MIDI_COMMAND_NOTE_ON >> 4)) && (ReceivedMIDIEvent.Data3 > 0))
  78                           LEDs_SetAllLEDs(ReceivedMIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2);
  79                         else
  80                           LEDs_SetAllLEDs(LEDS_NO_LEDS);
  81                 }
  82
  83                 MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
  84                 USB_USBTask();
  85         }
  86 }
  87
  88 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  89 void SetupHardware(void)
  90 {
  91         /* Disable watchdog if enabled by bootloader/fuses */
  92         MCUSR &= ~(1 << WDRF);
  93         wdt_disable();
  94
  95         /* Disable clock division */
  96         clock_prescale_set(clock_div_1);
  97
  98         /* Hardware Initialization */
  99         Joystick_Init();
 100         LEDs_Init();
 101         Buttons_Init();
 102         USB_Init();
 103 }
 104
 105 /** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
 106 void CheckJoystickMovement(void)
 107 {
 108         static uint8_t PrevJoystickStatus;
 109
 110         uint8_t MIDICommand = 0;
 111         uint8_t MIDIPitch;
 112
 113         /* Get current joystick mask, XOR with previous to detect joystick changes */
 114         uint8_t JoystickStatus  = Joystick_GetStatus();
 115         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 116
 117         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 118         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 119
 120         if (JoystickChanges & JOY_LEFT)
 121         {
 122                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 123                 MIDIPitch   = 0x3C;
 124         }
 125
 126         if (JoystickChanges & JOY_UP)
 127         {
 128                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 129                 MIDIPitch   = 0x3D;
 130         }
 131
 132         if (JoystickChanges & JOY_RIGHT)
 133         {
 134                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 135                 MIDIPitch   = 0x3E;
 136         }
 137
 138         if (JoystickChanges & JOY_DOWN)
 139         {
 140                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 141                 MIDIPitch   = 0x3F;
 142         }
 143
 144         if (JoystickChanges & JOY_PRESS)
 145         {
 146                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 147                 MIDIPitch   = 0x3B;
 148         }
 149
 150         if (MIDICommand)
 151         {
 152                 MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 153                         {
 154                                 .CableNumber = 0,
 155                                 .Command     = (MIDICommand >> 4),
 156
 157                                 .Data1       = MIDICommand | Channel,
 158                                 .Data2       = MIDIPitch,
 159                                 .Data3       = MIDI_STANDARD_VELOCITY,
 160                         };
 161
 162                 MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 163                 MIDI_Device_Flush(&Keyboard_MIDI_Interface);
 164         }
 165
 166         PrevJoystickStatus = JoystickStatus;
 167 }
 168
 169 /** Event handler for the library USB Connection event. */
 170 void EVENT_USB_Device_Connect(void)
 171 {
 172         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 173 }
 174
 175 /** Event handler for the library USB Disconnection event. */
 176 void EVENT_USB_Device_Disconnect(void)
 177 {
 178         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 179 }
 180
 181 /** Event handler for the library USB Configuration Changed event. */
 182 void EVENT_USB_Device_ConfigurationChanged(void)
 183 {
 184         bool ConfigSuccess = true;
 185
 186         ConfigSuccess &= MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface);
 187
 188         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 189 }
 190
 191 /** Event handler for the library USB Control Request reception event. */
 192 void EVENT_USB_Device_ControlRequest(void)
 193 {
 194         MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface);
 195 }
 196