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