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