Demos/Device/ClassDriver/MIDI/MIDI.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2010  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 /** 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         sei();
  68
  69         for (;;)
  70         {
  71                 CheckJoystickMovement();
  72
  73                 MIDI_EventPacket_t ReceivedMIDIEvent;
  74                 while (MIDI_Device_ReceiveEventPacket(&Keyboard_MIDI_Interface, &ReceivedMIDIEvent))
  75                 {
  76                         if ((ReceivedMIDIEvent.Command == (MIDI_COMMAND_NOTE_ON >> 4)) && (ReceivedMIDIEvent.Data3 > 0))
  77                           LEDs_SetAllLEDs(ReceivedMIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2);
  78                         else
  79                           LEDs_SetAllLEDs(LEDS_NO_LEDS);
  80                 }
  81
  82                 MIDI_Device_USBTask(&Keyboard_MIDI_Interface);
  83                 USB_USBTask();
  84         }
  85 }
  86
  87 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  88 void SetupHardware(void)
  89 {
  90         /* Disable watchdog if enabled by bootloader/fuses */
  91         MCUSR &= ~(1 << WDRF);
  92         wdt_disable();
  93
  94         /* Disable clock division */
  95         clock_prescale_set(clock_div_1);
  96
  97         /* Hardware Initialization */
  98         Joystick_Init();
  99         LEDs_Init();
 100         Buttons_Init();
 101         USB_Init();
 102 }
 103
 104 /** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
 105 void CheckJoystickMovement(void)
 106 {
 107         static uint8_t PrevJoystickStatus;
 108
 109         uint8_t MIDICommand = 0;
 110         uint8_t MIDIPitch;
 111
 112         /* Get current joystick mask, XOR with previous to detect joystick changes */
 113         uint8_t JoystickStatus  = Joystick_GetStatus();
 114         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 115
 116         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 117         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 118
 119         if (JoystickChanges & JOY_LEFT)
 120         {
 121                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 122                 MIDIPitch   = 0x3C;
 123         }
 124
 125         if (JoystickChanges & JOY_UP)
 126         {
 127                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 128                 MIDIPitch   = 0x3D;
 129         }
 130
 131         if (JoystickChanges & JOY_RIGHT)
 132         {
 133                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 134                 MIDIPitch   = 0x3E;
 135         }
 136
 137         if (JoystickChanges & JOY_DOWN)
 138         {
 139                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 140                 MIDIPitch   = 0x3F;
 141         }
 142
 143         if (JoystickChanges & JOY_PRESS)
 144         {
 145                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 146                 MIDIPitch   = 0x3B;
 147         }
 148
 149         if (MIDICommand)
 150         {
 151                 MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 152                         {
 153                                 .CableNumber = 0,
 154                                 .Command     = (MIDICommand >> 4),
 155
 156                                 .Data1       = MIDICommand | Channel,
 157                                 .Data2       = MIDIPitch,
 158                                 .Data3       = MIDI_STANDARD_VELOCITY,
 159                         };
 160
 161                 MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 162                 MIDI_Device_Flush(&Keyboard_MIDI_Interface);
 163         }
 164
 165         PrevJoystickStatus = JoystickStatus;
 166 }
 167
 168 /** Event handler for the library USB Connection event. */
 169 void EVENT_USB_Device_Connect(void)
 170 {
 171         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 172 }
 173
 174 /** Event handler for the library USB Disconnection event. */
 175 void EVENT_USB_Device_Disconnect(void)
 176 {
 177         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 178 }
 179
 180 /** Event handler for the library USB Configuration Changed event. */
 181 void EVENT_USB_Device_ConfigurationChanged(void)
 182 {
 183         bool ConfigSuccess = true;
 184
 185         ConfigSuccess &= MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface);
 186
 187         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 188 }
 189
 190 /** Event handler for the library USB Control Request reception event. */
 191 void EVENT_USB_Device_ControlRequest(void)
 192 {
 193         MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface);
 194 }
 195