Demos/Host/LowLevel/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 /** 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         Serial_Init(9600, false);
  70         LEDs_Init();
  71         Buttons_Init();
  72         Joystick_Init();
  73         USB_Init();
  74
  75         /* Create a stdio stream for the serial port for stdin and stdout */
  76         Serial_CreateStream(NULL);
  77 }
  78
  79 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
  80  *  starts the library USB task to begin the enumeration and USB management process.
  81  */
  82 void EVENT_USB_Host_DeviceAttached(void)
  83 {
  84         puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
  85         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  86 }
  87
  88 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
  89  *  stops the library USB task management process.
  90  */
  91 void EVENT_USB_Host_DeviceUnattached(void)
  92 {
  93         puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
  94         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  95 }
  96
  97 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
  98  *  enumerated by the host and is now ready to be used by the application.
  99  */
 100 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 101 {
 102         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 103 }
 104
 105 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 106 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 107 {
 108         USB_Disable();
 109
 110         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 111                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 112
 113         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 114         for(;;);
 115 }
 116
 117 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 118  *  enumerating an attached USB device.
 119  */
 120 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 121                                             const uint8_t SubErrorCode)
 122 {
 123         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 124                                  " -- Error Code %d\r\n"
 125                                  " -- Sub Error Code %d\r\n"
 126                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 127
 128         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 129 }
 130
 131 /** Task to set the configuration of the attached device after it has been enumerated, and to read in
 132  *  note on/off messages from the attached MIDI device and print it to the serial port. When the board
 133  *  joystick or buttons are pressed, note on/off messages are sent to the attached device.
 134  */
 135 void MIDI_Host_Task(void)
 136 {
 137         uint8_t ErrorCode;
 138
 139         switch (USB_HostState)
 140         {
 141                 case HOST_STATE_Addressed:
 142                         puts_P(PSTR("Getting Config Data.\r\n"));
 143
 144                         /* Get and process the configuration descriptor data */
 145                         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 146                         {
 147                                 if (ErrorCode == ControlError)
 148                                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
 149                                 else
 150                                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 151
 152                                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 153
 154                                 /* Indicate error via status LEDs */
 155                                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 156
 157                                 /* Wait until USB device disconnected */
 158                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 159                                 break;
 160                         }
 161
 162                         /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 163                         if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 164                         {
 165                                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
 166                                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 167
 168                                 /* Indicate error via status LEDs */
 169                                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 170
 171                                 /* Wait until USB device disconnected */
 172                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 173                                 break;
 174                         }
 175
 176                         puts_P(PSTR("MIDI Device Enumerated.\r\n"));
 177
 178                         USB_HostState = HOST_STATE_Configured;
 179                         break;
 180                 case HOST_STATE_Configured:
 181                         Pipe_SelectPipe(MIDI_DATA_IN_PIPE);
 182
 183                         if (Pipe_IsINReceived())
 184                         {
 185                                 MIDI_EventPacket_t MIDIEvent;
 186
 187                                 Pipe_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
 188
 189                                 if (!(Pipe_BytesInPipe()))
 190                                   Pipe_ClearIN();
 191
 192                                 bool NoteOnEvent  = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_ON  >> 4));
 193                                 bool NoteOffEvent = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_OFF >> 4));
 194
 195                                 if (NoteOnEvent || NoteOffEvent)
 196                                 {
 197                                         printf_P(PSTR("MIDI Note %s - Channel %d, Pitch %d, Velocity %d\r\n"), NoteOnEvent ? "On" : "Off",
 198                                                                                                            ((MIDIEvent.Data1 & 0x0F) + 1),
 199                                                                                                            MIDIEvent.Data2, MIDIEvent.Data3);
 200                                 }
 201                         }
 202
 203                         Pipe_SelectPipe(MIDI_DATA_OUT_PIPE);
 204
 205                         if (Pipe_IsOUTReady())
 206                         {
 207                                 uint8_t MIDICommand = 0;
 208                                 uint8_t MIDIPitch;
 209
 210                                 static uint8_t PrevJoystickStatus;
 211                                 uint8_t JoystickStatus  = Joystick_GetStatus();
 212                                 uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 213
 214                                 /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 215                                 uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 216
 217                                 if (JoystickChanges & JOY_LEFT)
 218                                 {
 219                                         MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 220                                         MIDIPitch   = 0x3C;
 221                                 }
 222
 223                                 if (JoystickChanges & JOY_UP)
 224                                 {
 225                                         MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 226                                         MIDIPitch   = 0x3D;
 227                                 }
 228
 229                                 if (JoystickChanges & JOY_RIGHT)
 230                                 {
 231                                         MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 232                                         MIDIPitch   = 0x3E;
 233                                 }
 234
 235                                 if (JoystickChanges & JOY_DOWN)
 236                                 {
 237                                         MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 238                                         MIDIPitch   = 0x3F;
 239                                 }
 240
 241                                 if (JoystickChanges & JOY_PRESS)
 242                                 {
 243                                         MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 244                                         MIDIPitch   = 0x3B;
 245                                 }
 246
 247                                 /* Check if a MIDI command is to be sent */
 248                                 if (MIDICommand)
 249                                 {
 250                                         MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 251                                                 {
 252                                                         .CableNumber = 0,
 253                                                         .Command     = (MIDICommand >> 4),
 254
 255                                                         .Data1       = MIDICommand | Channel,
 256                                                         .Data2       = MIDIPitch,
 257                                                         .Data3       = MIDI_STANDARD_VELOCITY,
 258                                                 };
 259
 260                                         /* Write the MIDI event packet to the pipe */
 261                                         Pipe_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
 262
 263                                         /* Send the data in the pipe to the device */
 264                                         Pipe_ClearOUT();
 265                                 }
 266
 267                                 /* Save previous joystick value for next joystick change detection */
 268                                 PrevJoystickStatus = JoystickStatus;
 269                         }
 270
 271                         break;
 272         }
 273 }
 274