Demos/Host/ClassDriver/MIDIHost/MIDIHost.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 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                                 .DataINPipe             =
  48                                         {
  49                                                 .Address        = (PIPE_DIR_IN  | 1),
  50                                                 .Banks          = 1,
  51                                         },
  52                                 .DataOUTPipe            =
  53                                         {
  54                                                 .Address        = (PIPE_DIR_OUT | 2),
  55                                                 .Banks          = 1,
  56                                         },
  57                         },
  58         };
  59
  60
  61 /** Main program entry point. This routine configures the hardware required by the application, then
  62  *  enters a loop to run the application tasks in sequence.
  63  */
  64 int main(void)
  65 {
  66         SetupHardware();
  67
  68         puts_P(PSTR(ESC_FG_CYAN "MIDI Host Demo running.\r\n" ESC_FG_WHITE));
  69
  70         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  71         sei();
  72
  73         for (;;)
  74         {
  75                 JoystickHost_Task();
  76
  77                 MIDI_Host_USBTask(&Keyboard_MIDI_Interface);
  78                 USB_USBTask();
  79         }
  80 }
  81
  82 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  83 void SetupHardware(void)
  84 {
  85         /* Disable watchdog if enabled by bootloader/fuses */
  86         MCUSR &= ~(1 << WDRF);
  87         wdt_disable();
  88
  89         /* Disable clock division */
  90         clock_prescale_set(clock_div_1);
  91
  92         /* Hardware Initialization */
  93         Serial_Init(9600, false);
  94         LEDs_Init();
  95         Buttons_Init();
  96         Joystick_Init();
  97         USB_Init();
  98
  99         /* Create a stdio stream for the serial port for stdin and stdout */
 100         Serial_CreateStream(NULL);
 101 }
 102
 103 /** Task to manage an enumerated USB MIDI device once connected, to display received
 104  *  note events from the host and send note changes in response to tbe board's joystick.
 105  */
 106 void JoystickHost_Task(void)
 107 {
 108         if (USB_HostState != HOST_STATE_Configured)
 109           return;
 110
 111         MIDI_EventPacket_t MIDIEvent;
 112         while (MIDI_Host_ReceiveEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent))
 113         {
 114                 bool NoteOnEvent  = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_ON  >> 4));
 115                 bool NoteOffEvent = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_OFF >> 4));
 116
 117                 /* Display note events from the host */
 118                 if (NoteOnEvent || NoteOffEvent)
 119                 {
 120                         printf_P(PSTR("MIDI Note %s - Channel %d, Pitch %d, Velocity %d\r\n"), NoteOnEvent ? "On" : "Off",
 121                                                                                                                                                                    ((MIDIEvent.Data1 & 0x0F) + 1),
 122                                                                                                                                                                    MIDIEvent.Data2, MIDIEvent.Data3);
 123                 }
 124         }
 125
 126         CheckJoystickMovement();
 127 }
 128
 129 /** Checks for movement of the board's joystick, and sends corresponding MIDI note on/off
 130  *  messages to the host.
 131  */
 132 void CheckJoystickMovement(void)
 133 {
 134         static uint8_t PrevJoystickStatus;
 135
 136         uint8_t MIDICommand = 0;
 137         uint8_t MIDIPitch;
 138
 139         /* Get current joystick mask, XOR with previous to detect joystick changes */
 140         uint8_t JoystickStatus  = Joystick_GetStatus();
 141         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 142
 143         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 144         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 145
 146         if (JoystickChanges & JOY_LEFT)
 147         {
 148                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 149                 MIDIPitch   = 0x3C;
 150         }
 151         else if (JoystickChanges & JOY_UP)
 152         {
 153                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 154                 MIDIPitch   = 0x3D;
 155         }
 156         else if (JoystickChanges & JOY_RIGHT)
 157         {
 158                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 159                 MIDIPitch   = 0x3E;
 160         }
 161         else if (JoystickChanges & JOY_DOWN)
 162         {
 163                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 164                 MIDIPitch   = 0x3F;
 165         }
 166         else if (JoystickChanges & JOY_PRESS)
 167         {
 168                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 169                 MIDIPitch   = 0x3B;
 170         }
 171
 172         if (MIDICommand)
 173         {
 174                 MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 175                         {
 176                                 .CableNumber = 0,
 177                                 .Command     = (MIDICommand >> 4),
 178
 179                                 .Data1       = MIDICommand | Channel,
 180                                 .Data2       = MIDIPitch,
 181                                 .Data3       = MIDI_STANDARD_VELOCITY,
 182                         };
 183
 184                 MIDI_Host_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 185                 MIDI_Host_Flush(&Keyboard_MIDI_Interface);
 186         }
 187
 188         PrevJoystickStatus = JoystickStatus;
 189 }
 190
 191 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 192  *  starts the library USB task to begin the enumeration and USB management process.
 193  */
 194 void EVENT_USB_Host_DeviceAttached(void)
 195 {
 196         puts_P(PSTR("Device Attached.\r\n"));
 197         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 198 }
 199
 200 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 201  *  stops the library USB task management process.
 202  */
 203 void EVENT_USB_Host_DeviceUnattached(void)
 204 {
 205         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 206         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 207 }
 208
 209 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 210  *  enumerated by the host and is now ready to be used by the application.
 211  */
 212 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 213 {
 214         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 215
 216         uint16_t ConfigDescriptorSize;
 217         uint8_t  ConfigDescriptorData[512];
 218
 219         if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
 220                                                sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
 221         {
 222                 puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
 223                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 224                 return;
 225         }
 226
 227         if (MIDI_Host_ConfigurePipes(&Keyboard_MIDI_Interface,
 228                                      ConfigDescriptorSize, ConfigDescriptorData) != MIDI_ENUMERROR_NoError)
 229         {
 230                 puts_P(PSTR("Attached Device Not a Valid MIDI Class Device.\r\n"));
 231                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 232                 return;
 233         }
 234
 235         if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 236         {
 237                 puts_P(PSTR("Error Setting Device Configuration.\r\n"));
 238                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 239                 return;
 240         }
 241
 242         puts_P(PSTR("MIDI Device Enumerated.\r\n"));
 243         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 244 }
 245
 246 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 247 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 248 {
 249         USB_Disable();
 250
 251         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 252                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 253
 254         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 255         for(;;);
 256 }
 257
 258 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 259  *  enumerating an attached USB device.
 260  */
 261 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 262                                             const uint8_t SubErrorCode)
 263 {
 264         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 265                                  " -- Error Code %d\r\n"
 266                                  " -- Sub Error Code %d\r\n"
 267                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 268
 269         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 270 }
 271