Demos/Device/ClassDriver/MIDI/MIDI.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  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                                 .DataINEndpoint           =
  49                                         {
  50                                                 .Address          = MIDI_STREAM_IN_EPADDR,
  51                                                 .Size             = MIDI_STREAM_EPSIZE,
  52                                                 .Banks            = 1,
  53                                         },
  54                                 .DataOUTEndpoint          =
  55                                         {
  56                                                 .Address          = MIDI_STREAM_OUT_EPADDR,
  57                                                 .Size             = MIDI_STREAM_EPSIZE,
  58                                                 .Banks            = 1,
  59                                         },
  60                         },
  61         };
  62
  63
  64 /** Main program entry point. This routine contains the overall program flow, including initial
  65  *  setup of all components and the main program loop.
  66  */
  67 int main(void)
  68 {
  69         SetupHardware();
  70
  71         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  72         sei();
  73
  74         for (;;)
  75         {
  76                 CheckJoystickMovement();
  77
  78                 MIDI_EventPacket_t ReceivedMIDIEvent;
  79                 while (MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &ReceivedMIDIEvent))
  80                 {
  81                         if ((ReceivedMIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON)) && (ReceivedMIDIEvent.Data3 > 0))
  82                           LEDs_SetAllLEDs(ReceivedMIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2);
  83                         else
  84                           LEDs_SetAllLEDs(LEDS_NO_LEDS);
  85                 }
  86
  87                 MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
  88                 USB_USBTask();
  89         }
  90 }
  91
  92 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  93 void SetupHardware(void)
  94 {
  95         /* Disable watchdog if enabled by bootloader/fuses */
  96         MCUSR &= ~(1 << WDRF);
  97         wdt_disable();
  98
  99         /* Disable clock division */
 100         clock_prescale_set(clock_div_1);
 101
 102         /* Hardware Initialization */
 103         Joystick_Init();
 104         LEDs_Init();
 105         Buttons_Init();
 106         USB_Init();
 107 }
 108
 109 /** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
 110 void CheckJoystickMovement(void)
 111 {
 112         static uint8_t PrevJoystickStatus;
 113
 114         uint8_t MIDICommand = 0;
 115         uint8_t MIDIPitch;
 116
 117         /* Get current joystick mask, XOR with previous to detect joystick changes */
 118         uint8_t JoystickStatus  = Joystick_GetStatus();
 119         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 120
 121         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 122         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 123
 124         if (JoystickChanges & JOY_LEFT)
 125         {
 126                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 127                 MIDIPitch   = 0x3C;
 128         }
 129
 130         if (JoystickChanges & JOY_UP)
 131         {
 132                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 133                 MIDIPitch   = 0x3D;
 134         }
 135
 136         if (JoystickChanges & JOY_RIGHT)
 137         {
 138                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 139                 MIDIPitch   = 0x3E;
 140         }
 141
 142         if (JoystickChanges & JOY_DOWN)
 143         {
 144                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 145                 MIDIPitch   = 0x3F;
 146         }
 147
 148         if (JoystickChanges & JOY_PRESS)
 149         {
 150                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 151                 MIDIPitch   = 0x3B;
 152         }
 153
 154         if (MIDICommand)
 155         {
 156                 MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 157                         {
 158                                 .Event       = MIDI_EVENT(0, MIDICommand),
 159
 160                                 .Data1       = MIDICommand | Channel,
 161                                 .Data2       = MIDIPitch,
 162                                 .Data3       = MIDI_STANDARD_VELOCITY,
 163                         };
 164
 165                 MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 166                 MIDI_Device_Flush(&Keyboard_MIDI_Interface);
 167         }
 168
 169         PrevJoystickStatus = JoystickStatus;
 170 }
 171
 172 /** Event handler for the library USB Connection event. */
 173 void EVENT_USB_Device_Connect(void)
 174 {
 175         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 176 }
 177
 178 /** Event handler for the library USB Disconnection event. */
 179 void EVENT_USB_Device_Disconnect(void)
 180 {
 181         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 182 }
 183
 184 /** Event handler for the library USB Configuration Changed event. */
 185 void EVENT_USB_Device_ConfigurationChanged(void)
 186 {
 187         bool ConfigSuccess = true;
 188
 189         ConfigSuccess &= MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface);
 190
 191         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 192 }
 193
 194 /** Event handler for the library USB Control Request reception event. */
 195 void EVENT_USB_Device_ControlRequest(void)
 196 {
 197         MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface);
 198 }
 199