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.lufa-lib.org
   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,
 118                                             const uint8_t SubErrorCode)
 119 {
 120         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 121                                  " -- Error Code %d\r\n"
 122                                  " -- Sub Error Code %d\r\n"
 123                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 124
 125         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 126 }
 127
 128 /** Task to set the configuration of the attached device after it has been enumerated, and to read in
 129  *  note on/off messages from the attached MIDI device and print it to the serial port. When the board
 130  *  joystick or buttons are pressed, note on/off messages are sent to the attached device.
 131  */
 132 void MIDI_Host_Task(void)
 133 {
 134         uint8_t ErrorCode;
 135
 136         switch (USB_HostState)
 137         {
 138                 case HOST_STATE_Addressed:
 139                         puts_P(PSTR("Getting Config Data.\r\n"));
 140
 141                         /* Get and process the configuration descriptor data */
 142                         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 143                         {
 144                                 if (ErrorCode == ControlError)
 145                                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
 146                                 else
 147                                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 148
 149                                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 150
 151                                 /* Indicate error via status LEDs */
 152                                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 153
 154                                 /* Wait until USB device disconnected */
 155                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 156                                 break;
 157                         }
 158
 159                         /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 160                         if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 161                         {
 162                                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
 163                                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 164
 165                                 /* Indicate error via status LEDs */
 166                                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 167
 168                                 /* Wait until USB device disconnected */
 169                                 USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 170                                 break;
 171                         }
 172
 173                         puts_P(PSTR("MIDI Device Enumerated.\r\n"));
 174
 175                         USB_HostState = HOST_STATE_Configured;
 176                         break;
 177                 case HOST_STATE_Configured:
 178                         Pipe_SelectPipe(MIDI_DATA_IN_PIPE);
 179
 180                         if (Pipe_IsINReceived())
 181                         {
 182                                 MIDI_EventPacket_t MIDIEvent;
 183
 184                                 Pipe_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent));
 185
 186                                 bool NoteOnEvent  = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_ON  >> 4));
 187                                 bool NoteOffEvent = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_OFF >> 4));
 188
 189                                 if (NoteOnEvent || NoteOffEvent)
 190                                 {
 191                                         printf_P(PSTR("MIDI Note %s - Channel %d, Pitch %d, Velocity %d\r\n"), NoteOnEvent ? "On" : "Off",
 192                                                                                                            ((MIDIEvent.Data1 & 0x0F) + 1),
 193                                                                                                            MIDIEvent.Data2, MIDIEvent.Data3);
 194                                 }
 195
 196                                 if (!(Pipe_BytesInPipe()))
 197                                   Pipe_ClearIN();
 198                         }
 199
 200                         Pipe_SelectPipe(MIDI_DATA_OUT_PIPE);
 201
 202                         if (Pipe_IsOUTReady())
 203                         {
 204                                 uint8_t MIDICommand = 0;
 205                                 uint8_t MIDIPitch;
 206
 207                                 static uint8_t PrevJoystickStatus;
 208                                 uint8_t JoystickStatus  = Joystick_GetStatus();
 209                                 uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 210
 211                                 /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 212                                 uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 213
 214                                 if (JoystickChanges & JOY_LEFT)
 215                                 {
 216                                         MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 217                                         MIDIPitch   = 0x3C;
 218                                 }
 219
 220                                 if (JoystickChanges & JOY_UP)
 221                                 {
 222                                         MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 223                                         MIDIPitch   = 0x3D;
 224                                 }
 225
 226                                 if (JoystickChanges & JOY_RIGHT)
 227                                 {
 228                                         MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 229                                         MIDIPitch   = 0x3E;
 230                                 }
 231
 232                                 if (JoystickChanges & JOY_DOWN)
 233                                 {
 234                                         MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 235                                         MIDIPitch   = 0x3F;
 236                                 }
 237
 238                                 if (JoystickChanges & JOY_PRESS)
 239                                 {
 240                                         MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 241                                         MIDIPitch   = 0x3B;
 242                                 }
 243
 244                                 /* Check if a MIDI command is to be sent */
 245                                 if (MIDICommand)
 246                                 {
 247                                         MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 248                                                 {
 249                                                         .CableNumber = 0,
 250                                                         .Command     = (MIDICommand >> 4),
 251
 252                                                         .Data1       = MIDICommand | Channel,
 253                                                         .Data2       = MIDIPitch,
 254                                                         .Data3       = MIDI_STANDARD_VELOCITY,
 255                                                 };
 256
 257                                         /* Write the MIDI event packet to the pipe */
 258                                         Pipe_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent));
 259
 260                                         /* Send the data in the pipe to the device */
 261                                         Pipe_ClearOUT();
 262                                 }
 263
 264                                 /* Save previous joystick value for next joystick change detection */
 265                                 PrevJoystickStatus = JoystickStatus;
 266                         }
 267
 268                         break;
 269         }
 270 }
 271