protocol/lufa/LUFA-git/Demos/Host/LowLevel/MIDIHost/MIDIHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  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 disclaims 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         GlobalInterruptEnable();
  50
  51         for (;;)
  52         {
  53                 MIDIHost_Task();
  54
  55                 USB_USBTask();
  56         }
  57 }
  58
  59 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  60 void SetupHardware(void)
  61 {
  62 #if (ARCH == ARCH_AVR8)
  63         /* Disable watchdog if enabled by bootloader/fuses */
  64         MCUSR &= ~(1 << WDRF);
  65         wdt_disable();
  66
  67         /* Disable clock division */
  68         clock_prescale_set(clock_div_1);
  69 #endif
  70
  71         /* Hardware Initialization */
  72         Serial_Init(9600, false);
  73         LEDs_Init();
  74         Buttons_Init();
  75         Joystick_Init();
  76         USB_Init();
  77
  78         /* Create a stdio stream for the serial port for stdin and stdout */
  79         Serial_CreateStream(NULL);
  80 }
  81
  82 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
  83  *  starts the library USB task to begin the enumeration and USB management process.
  84  */
  85 void EVENT_USB_Host_DeviceAttached(void)
  86 {
  87         puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
  88         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  89 }
  90
  91 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
  92  *  stops the library USB task management process.
  93  */
  94 void EVENT_USB_Host_DeviceUnattached(void)
  95 {
  96         puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
  97         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  98 }
  99
 100 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 101  *  enumerated by the host and is now ready to be used by the application.
 102  */
 103 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 104 {
 105         puts_P(PSTR("Getting Config Data.\r\n"));
 106
 107         uint8_t ErrorCode;
 108
 109         /* Get and process the configuration descriptor data */
 110         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 111         {
 112                 if (ErrorCode == ControlError)
 113                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
 114                 else
 115                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 116
 117                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 118
 119                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 120                 return;
 121         }
 122
 123         /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 124         if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 125         {
 126                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
 127                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 128
 129                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 130                 return;
 131         }
 132
 133         puts_P(PSTR("MIDI Device Enumerated.\r\n"));
 134         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 135 }
 136
 137 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 138 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 139 {
 140         USB_Disable();
 141
 142         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 143                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 144
 145         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 146         for(;;);
 147 }
 148
 149 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 150  *  enumerating an attached USB device.
 151  */
 152 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 153                                             const uint8_t SubErrorCode)
 154 {
 155         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 156                                  " -- Error Code %d\r\n"
 157                                  " -- Sub Error Code %d\r\n"
 158                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 159
 160         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 161 }
 162
 163 /** Task to read in note on/off messages from the attached MIDI device and print it to the serial port.
 164  *  When the board joystick or buttons are pressed, note on/off messages are sent to the attached device.
 165  */
 166 void MIDIHost_Task(void)
 167 {
 168         if (USB_HostState != HOST_STATE_Configured)
 169           return;
 170
 171         Pipe_SelectPipe(MIDI_DATA_IN_PIPE);
 172         Pipe_Unfreeze();
 173
 174         if (Pipe_IsINReceived())
 175         {
 176                 MIDI_EventPacket_t MIDIEvent;
 177
 178                 Pipe_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
 179
 180                 if (!(Pipe_BytesInPipe()))
 181                   Pipe_ClearIN();
 182
 183                 bool NoteOnEvent  = (MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON));
 184                 bool NoteOffEvent = (MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_OFF));
 185
 186                 if (NoteOnEvent || NoteOffEvent)
 187                 {
 188                         printf_P(PSTR("MIDI Note %s - Channel %d, Pitch %d, Velocity %d\r\n"), NoteOnEvent ? "On" : "Off",
 189                                                                                                                                                                    ((MIDIEvent.Data1 & 0x0F) + 1),
 190                                                                                                                                                                    MIDIEvent.Data2, MIDIEvent.Data3);
 191                 }
 192         }
 193
 194         Pipe_Freeze();
 195
 196         Pipe_SelectPipe(MIDI_DATA_OUT_PIPE);
 197         Pipe_Unfreeze();
 198
 199         if (Pipe_IsOUTReady())
 200         {
 201                 uint8_t MIDICommand = 0;
 202                 uint8_t MIDIPitch;
 203
 204                 static uint8_t PrevJoystickStatus;
 205                 uint8_t JoystickStatus  = Joystick_GetStatus();
 206                 uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 207
 208                 /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 209                 uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 210
 211                 if (JoystickChanges & JOY_LEFT)
 212                 {
 213                         MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 214                         MIDIPitch   = 0x3C;
 215                 }
 216
 217                 if (JoystickChanges & JOY_UP)
 218                 {
 219                         MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 220                         MIDIPitch   = 0x3D;
 221                 }
 222
 223                 if (JoystickChanges & JOY_RIGHT)
 224                 {
 225                         MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 226                         MIDIPitch   = 0x3E;
 227                 }
 228
 229                 if (JoystickChanges & JOY_DOWN)
 230                 {
 231                         MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 232                         MIDIPitch   = 0x3F;
 233                 }
 234
 235                 if (JoystickChanges & JOY_PRESS)
 236                 {
 237                         MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 238                         MIDIPitch   = 0x3B;
 239                 }
 240
 241                 /* Check if a MIDI command is to be sent */
 242                 if (MIDICommand)
 243                 {
 244                         MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 245                                 {
 246                                         .Event       = MIDI_EVENT(0, MIDICommand),
 247
 248                                         .Data1       = MIDICommand | Channel,
 249                                         .Data2       = MIDIPitch,
 250                                         .Data3       = MIDI_STANDARD_VELOCITY,
 251                                 };
 252
 253                         /* Write the MIDI event packet to the pipe */
 254                         Pipe_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
 255
 256                         /* Send the data in the pipe to the device */
 257                         Pipe_ClearOUT();
 258                 }
 259
 260                 Pipe_Freeze();
 261
 262                 /* Save previous joystick value for next joystick change detection */
 263                 PrevJoystickStatus = JoystickStatus;
 264         }
 265 }
 266