Demos/Host/LowLevel/MIDIHost/MIDIHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   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 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 /** Main program entry point. This routine configures the hardware required by the application, then
  40  *  enters a loop to run the application tasks in sequence.
  41  */
  42 int main(void)
  43 {
  44         SetupHardware();
  45
  46         puts_P(PSTR(ESC_FG_CYAN "MIDI Host Demo running.\r\n" ESC_FG_WHITE));
  47
  48         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  49         sei();
  50
  51         for (;;)
  52         {
  53                 MIDI_Host_Task();
  54                 USB_USBTask();
  55         }
  56 }
  57
  58 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  59 void SetupHardware(void)
  60 {
  61         /* Disable watchdog if enabled by bootloader/fuses */
  62         MCUSR &= ~(1 << WDRF);
  63         wdt_disable();
  64
  65         /* Disable clock division */
  66         clock_prescale_set(clock_div_1);
  67
  68         /* Hardware Initialization */
  69         SerialStream_Init(9600, false);
  70         LEDs_Init();
  71         Buttons_Init();
  72         Joystick_Init();
  73         USB_Init();
  74 }
  75
  76 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
  77  *  starts the library USB task to begin the enumeration and USB management process.
  78  */
  79 void EVENT_USB_Host_DeviceAttached(void)
  80 {
  81         puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
  82         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  83 }
  84
  85 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
  86  *  stops the library USB task management process.
  87  */
  88 void EVENT_USB_Host_DeviceUnattached(void)
  89 {
  90         puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
  91         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  92 }
  93
  94 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
  95  *  enumerated by the host and is now ready to be used by the application.
  96  */
  97 void EVENT_USB_Host_DeviceEnumerationComplete(void)
  98 {
  99         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 100 }
 101
 102 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 103 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 104 {
 105         USB_ShutDown();
 106
 107         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 108                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 109
 110         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 111         for(;;);
 112 }
 113
 114 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 115  *  enumerating an attached USB device.
 116  */
 117 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode, const uint8_t SubErrorCode)
 118 {
 119         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 120                                  " -- Error Code %d\r\n"
 121                                  " -- Sub Error Code %d\r\n"
 122                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 123
 124         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 125 }
 126
 127 /** Task to set the configuration of the attached device after it has been enumerated, and to read in
 128  *  note on/off messages from the attached MIDI device and print it to the serial port. When the board
 129  *  joystick or buttons are pressed, note on/off messages are sent to the attached device.
 130  */
 131 void MIDI_Host_Task(void)
 132 {
 133         uint8_t ErrorCode;
 134
 135         switch (USB_HostState)
 136         {
 137                 case HOST_STATE_Addressed:
 138                         puts_P(PSTR("Getting Config Data.\r\n"));
 139
 140                         /* Get and process the configuration descriptor data */
 141                         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 142                         {
 143                                 if (ErrorCode == ControlError)
 144                                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
 145                                 else
 146                                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 147
 148                                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 149
 150                                 /* Indicate error via status LEDs */
 151                                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 152
 153                                 /* Wait until USB device disconnected */
 154                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 155                                 break;
 156                         }
 157
 158                         /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 159                         if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 160                         {
 161                                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
 162                                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 163
 164                                 /* Indicate error via status LEDs */
 165                                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 166
 167                                 /* Wait until USB device disconnected */
 168                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 169                                 break;
 170                         }
 171
 172                         puts_P(PSTR("MIDI Device Enumerated.\r\n"));
 173
 174                         USB_HostState = HOST_STATE_Configured;
 175                         break;
 176                 case HOST_STATE_Configured:
 177                         Pipe_SelectPipe(MIDI_DATAPIPE_IN);
 178
 179                         if (Pipe_IsINReceived())
 180                         {
 181                                 USB_MIDI_EventPacket_t MIDIEvent;
 182
 183                                 Pipe_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent));
 184
 185                                 bool NoteOnEvent  = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_ON  >> 4));
 186                                 bool NoteOffEvent = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_OFF >> 4));
 187
 188                                 if (NoteOnEvent || NoteOffEvent)
 189                                 {
 190                                         printf_P(PSTR("MIDI Note %s - Channel %d, Pitch %d, Velocity %d\r\n"), NoteOnEvent ? "On" : "Off",
 191                                                                                                            ((MIDIEvent.Data1 & 0x0F) + 1),
 192                                                                                                            MIDIEvent.Data2, MIDIEvent.Data3);
 193                                 }
 194
 195                                 Pipe_ClearIN();
 196                         }
 197
 198                         Pipe_SelectPipe(MIDI_DATAPIPE_OUT);
 199
 200                         static uint8_t PrevJoystickStatus;
 201
 202                         if (Pipe_IsOUTReady())
 203                         {
 204                                 uint8_t MIDICommand = 0;
 205                                 uint8_t MIDIPitch;
 206
 207                                 uint8_t JoystickStatus  = Joystick_GetStatus();
 208                                 uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 209
 210                                 /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 211                                 uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 212
 213                                 if (JoystickChanges & JOY_LEFT)
 214                                 {
 215                                         MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 216                                         MIDIPitch   = 0x3C;
 217                                 }
 218
 219                                 if (JoystickChanges & JOY_UP)
 220                                 {
 221                                         MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 222                                         MIDIPitch   = 0x3D;
 223                                 }
 224
 225                                 if (JoystickChanges & JOY_RIGHT)
 226                                 {
 227                                         MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 228                                         MIDIPitch   = 0x3E;
 229                                 }
 230
 231                                 if (JoystickChanges & JOY_DOWN)
 232                                 {
 233                                         MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 234                                         MIDIPitch   = 0x3F;
 235                                 }
 236
 237                                 if (JoystickChanges & JOY_PRESS)
 238                                 {
 239                                         MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 240                                         MIDIPitch   = 0x3B;
 241                                 }
 242
 243                                 /* Check if a MIDI command is to be sent */
 244                                 if (MIDICommand)
 245                                 {
 246                                         USB_MIDI_EventPacket_t MIDIEvent = (USB_MIDI_EventPacket_t)
 247                                                 {
 248                                                         .CableNumber = 0,
 249                                                         .Command     = (MIDICommand >> 4),
 250
 251                                                         .Data1       = MIDICommand | Channel,
 252                                                         .Data2       = MIDIPitch,
 253                                                         .Data3       = MIDI_STANDARD_VELOCITY,
 254                                                 };
 255
 256                                         /* Write the MIDI event packet to the pipe */
 257                                         Pipe_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent));
 258
 259                                         /* Send the data in the pipe to the device */
 260                                         Pipe_ClearOUT();
 261                                 }
 262
 263                                 /* Save previous joystick value for next joystick change detection */
 264                                 PrevJoystickStatus = JoystickStatus;
 265                         }
 266
 267                         break;
 268         }
 269 }