Demos/Host/ClassDriver/MIDIHost/MIDIHost.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 MIDIHost demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "MIDIHost.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_Host_t Keyboard_MIDI_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .DataINPipeNumber       = 1,
  48                                 .DataINPipeDoubleBank   = false,
  49
  50                                 .DataOUTPipeNumber      = 2,
  51                                 .DataOUTPipeDoubleBank  = false,
  52                         },
  53         };
  54
  55
  56 /** Main program entry point. This routine configures the hardware required by the application, then
  57  *  enters a loop to run the application tasks in sequence.
  58  */
  59 int main(void)
  60 {
  61         SetupHardware();
  62
  63         puts_P(PSTR(ESC_FG_CYAN "MIDI Host Demo running.\r\n" ESC_FG_WHITE));
  64
  65         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  66         sei();
  67
  68         for (;;)
  69         {
  70                 JoystickHost_Task();
  71
  72                 MIDI_Host_USBTask(&Keyboard_MIDI_Interface);
  73                 USB_USBTask();
  74         }
  75 }
  76
  77 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  78 void SetupHardware(void)
  79 {
  80         /* Disable watchdog if enabled by bootloader/fuses */
  81         MCUSR &= ~(1 << WDRF);
  82         wdt_disable();
  83
  84         /* Disable clock division */
  85         clock_prescale_set(clock_div_1);
  86
  87         /* Hardware Initialization */
  88         Serial_Init(9600, false);
  89         LEDs_Init();
  90         Buttons_Init();
  91         Joystick_Init();
  92         USB_Init();
  93
  94         /* Create a stdio stream for the serial port for stdin and stdout */
  95         Serial_CreateStream(NULL);
  96 }
  97
  98 /** Task to manage an enumerated USB MIDI device once connected, to display received
  99  *  note events from the host and send note changes in response to tbe board's joystick.
 100  */
 101 void JoystickHost_Task(void)
 102 {
 103         if (USB_HostState != HOST_STATE_Configured)
 104           return;
 105
 106         MIDI_EventPacket_t MIDIEvent;
 107         while (MIDI_Host_ReceiveEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent))
 108         {
 109                 bool NoteOnEvent  = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_ON  >> 4));
 110                 bool NoteOffEvent = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_OFF >> 4));
 111
 112                 /* Display note events from the host */
 113                 if (NoteOnEvent || NoteOffEvent)
 114                 {
 115                         printf_P(PSTR("MIDI Note %s - Channel %d, Pitch %d, Velocity %d\r\n"), NoteOnEvent ? "On" : "Off",
 116                                                                                                                                                                    ((MIDIEvent.Data1 & 0x0F) + 1),
 117                                                                                                                                                                    MIDIEvent.Data2, MIDIEvent.Data3);
 118                 }
 119         }
 120
 121         CheckJoystickMovement();
 122 }
 123
 124 /** Checks for movement of the board's joystick, and sends corresponding MIDI note on/off
 125  *  messages to the host.
 126  */
 127 void CheckJoystickMovement(void)
 128 {
 129         static uint8_t PrevJoystickStatus;
 130
 131         uint8_t MIDICommand = 0;
 132         uint8_t MIDIPitch;
 133
 134         /* Get current joystick mask, XOR with previous to detect joystick changes */
 135         uint8_t JoystickStatus  = Joystick_GetStatus();
 136         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 137
 138         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 139         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 140
 141         if (JoystickChanges & JOY_LEFT)
 142         {
 143                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 144                 MIDIPitch   = 0x3C;
 145         }
 146         else if (JoystickChanges & JOY_UP)
 147         {
 148                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 149                 MIDIPitch   = 0x3D;
 150         }
 151         else if (JoystickChanges & JOY_RIGHT)
 152         {
 153                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 154                 MIDIPitch   = 0x3E;
 155         }
 156         else if (JoystickChanges & JOY_DOWN)
 157         {
 158                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 159                 MIDIPitch   = 0x3F;
 160         }
 161         else if (JoystickChanges & JOY_PRESS)
 162         {
 163                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 164                 MIDIPitch   = 0x3B;
 165         }
 166
 167         if (MIDICommand)
 168         {
 169                 MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 170                         {
 171                                 .CableNumber = 0,
 172                                 .Command     = (MIDICommand >> 4),
 173
 174                                 .Data1       = MIDICommand | Channel,
 175                                 .Data2       = MIDIPitch,
 176                                 .Data3       = MIDI_STANDARD_VELOCITY,
 177                         };
 178
 179                 MIDI_Host_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 180                 MIDI_Host_Flush(&Keyboard_MIDI_Interface);
 181         }
 182
 183         PrevJoystickStatus = JoystickStatus;
 184 }
 185
 186 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 187  *  starts the library USB task to begin the enumeration and USB management process.
 188  */
 189 void EVENT_USB_Host_DeviceAttached(void)
 190 {
 191         puts_P(PSTR("Device Attached.\r\n"));
 192         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 193 }
 194
 195 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 196  *  stops the library USB task management process.
 197  */
 198 void EVENT_USB_Host_DeviceUnattached(void)
 199 {
 200         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 201         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 202 }
 203
 204 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 205  *  enumerated by the host and is now ready to be used by the application.
 206  */
 207 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 208 {
 209         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 210
 211         uint16_t ConfigDescriptorSize;
 212         uint8_t  ConfigDescriptorData[512];
 213
 214         if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
 215                                                sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
 216         {
 217                 puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
 218                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 219                 return;
 220         }
 221
 222         if (MIDI_Host_ConfigurePipes(&Keyboard_MIDI_Interface,
 223                                      ConfigDescriptorSize, ConfigDescriptorData) != MIDI_ENUMERROR_NoError)
 224         {
 225                 puts_P(PSTR("Attached Device Not a Valid MIDI Class Device.\r\n"));
 226                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 227                 return;
 228         }
 229
 230         if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 231         {
 232                 puts_P(PSTR("Error Setting Device Configuration.\r\n"));
 233                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 234                 return;
 235         }
 236
 237         puts_P(PSTR("MIDI Device Enumerated.\r\n"));
 238         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 239 }
 240
 241 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 242 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 243 {
 244         USB_Disable();
 245
 246         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 247                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 248
 249         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 250         for(;;);
 251 }
 252
 253 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 254  *  enumerating an attached USB device.
 255  */
 256 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 257                                             const uint8_t SubErrorCode)
 258 {
 259         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 260                                  " -- Error Code %d\r\n"
 261                                  " -- Sub Error Code %d\r\n"
 262                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 263
 264         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 265 }
 266