Demos/Device/ClassDriver/MIDI/MIDI.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  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 disclaims 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 = INTERFACE_ID_AudioStream,
  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         GlobalInterruptEnable();
  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 #if (ARCH == ARCH_AVR8)
  96         /* Disable watchdog if enabled by bootloader/fuses */
  97         MCUSR &= ~(1 << WDRF);
  98         wdt_disable();
  99
 100         /* Disable clock division */
 101         clock_prescale_set(clock_div_1);
 102 #elif (ARCH == ARCH_XMEGA)
 103         /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
 104         XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
 105         XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
 106
 107         /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
 108         XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
 109         XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
 110
 111         PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
 112 #endif
 113
 114         /* Hardware Initialization */
 115         Joystick_Init();
 116         LEDs_Init();
 117         Buttons_Init();
 118         USB_Init();
 119 }
 120
 121 /** Checks for changes in the position of the board joystick, sending MIDI events to the host upon each change. */
 122 void CheckJoystickMovement(void)
 123 {
 124         static uint8_t PrevJoystickStatus;
 125
 126         uint8_t MIDICommand = 0;
 127         uint8_t MIDIPitch;
 128
 129         /* Get current joystick mask, XOR with previous to detect joystick changes */
 130         uint8_t JoystickStatus  = Joystick_GetStatus();
 131         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 132
 133         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 134         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 135
 136         if (JoystickChanges & JOY_LEFT)
 137         {
 138                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 139                 MIDIPitch   = 0x3C;
 140         }
 141
 142         if (JoystickChanges & JOY_UP)
 143         {
 144                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 145                 MIDIPitch   = 0x3D;
 146         }
 147
 148         if (JoystickChanges & JOY_RIGHT)
 149         {
 150                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 151                 MIDIPitch   = 0x3E;
 152         }
 153
 154         if (JoystickChanges & JOY_DOWN)
 155         {
 156                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 157                 MIDIPitch   = 0x3F;
 158         }
 159
 160         if (JoystickChanges & JOY_PRESS)
 161         {
 162                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 163                 MIDIPitch   = 0x3B;
 164         }
 165
 166         if (MIDICommand)
 167         {
 168                 MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 169                         {
 170                                 .Event       = MIDI_EVENT(0, MIDICommand),
 171
 172                                 .Data1       = MIDICommand | Channel,
 173                                 .Data2       = MIDIPitch,
 174                                 .Data3       = MIDI_STANDARD_VELOCITY,
 175                         };
 176
 177                 MIDI_Device_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 178                 MIDI_Device_Flush(&Keyboard_MIDI_Interface);
 179         }
 180
 181         PrevJoystickStatus = JoystickStatus;
 182 }
 183
 184 /** Event handler for the library USB Connection event. */
 185 void EVENT_USB_Device_Connect(void)
 186 {
 187         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 188 }
 189
 190 /** Event handler for the library USB Disconnection event. */
 191 void EVENT_USB_Device_Disconnect(void)
 192 {
 193         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 194 }
 195
 196 /** Event handler for the library USB Configuration Changed event. */
 197 void EVENT_USB_Device_ConfigurationChanged(void)
 198 {
 199         bool ConfigSuccess = true;
 200
 201         ConfigSuccess &= MIDI_Device_ConfigureEndpoints(&Keyboard_MIDI_Interface);
 202
 203         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 204 }
 205
 206 /** Event handler for the library USB Control Request reception event. */
 207 void EVENT_USB_Device_ControlRequest(void)
 208 {
 209         MIDI_Device_ProcessControlRequest(&Keyboard_MIDI_Interface);
 210 }
 211