Demos/Host/LowLevel/MIDIHost/MIDIHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2013.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2013  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         /* Disable watchdog if enabled by bootloader/fuses */
  63         MCUSR &= ~(1 << WDRF);
  64         wdt_disable();
  65
  66         /* Disable clock division */
  67         clock_prescale_set(clock_div_1);
  68
  69         /* Hardware Initialization */
  70         Serial_Init(9600, false);
  71         LEDs_Init();
  72         Buttons_Init();
  73         Joystick_Init();
  74         USB_Init();
  75
  76         /* Create a stdio stream for the serial port for stdin and stdout */
  77         Serial_CreateStream(NULL);
  78 }
  79
  80 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
  81  *  starts the library USB task to begin the enumeration and USB management process.
  82  */
  83 void EVENT_USB_Host_DeviceAttached(void)
  84 {
  85         puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
  86         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  87 }
  88
  89 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
  90  *  stops the library USB task management process.
  91  */
  92 void EVENT_USB_Host_DeviceUnattached(void)
  93 {
  94         puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
  95         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  96 }
  97
  98 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
  99  *  enumerated by the host and is now ready to be used by the application.
 100  */
 101 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 102 {
 103         puts_P(PSTR("Getting Config Data.\r\n"));
 104
 105         uint8_t ErrorCode;
 106
 107         /* Get and process the configuration descriptor data */
 108         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 109         {
 110                 if (ErrorCode == ControlError)
 111                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
 112                 else
 113                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 114
 115                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 116
 117                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 118                 return;
 119         }
 120
 121         /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 122         if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 123         {
 124                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
 125                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 126
 127                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 128                 return;
 129         }
 130
 131         puts_P(PSTR("MIDI Device Enumerated.\r\n"));
 132         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 133 }
 134
 135 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 136 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 137 {
 138         USB_Disable();
 139
 140         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 141                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 142
 143         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 144         for(;;);
 145 }
 146
 147 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 148  *  enumerating an attached USB device.
 149  */
 150 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 151                                             const uint8_t SubErrorCode)
 152 {
 153         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 154                                  " -- Error Code %d\r\n"
 155                                  " -- Sub Error Code %d\r\n"
 156                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 157
 158         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 159 }
 160
 161 /** Task to read in note on/off messages from the attached MIDI device and print it to the serial port.
 162  *  When the board joystick or buttons are pressed, note on/off messages are sent to the attached device.
 163  */
 164 void MIDIHost_Task(void)
 165 {
 166         if (USB_HostState != HOST_STATE_Configured)
 167           return;
 168
 169         Pipe_SelectPipe(MIDI_DATA_IN_PIPE);
 170         Pipe_Unfreeze();
 171
 172         if (Pipe_IsINReceived())
 173         {
 174                 MIDI_EventPacket_t MIDIEvent;
 175
 176                 Pipe_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
 177
 178                 if (!(Pipe_BytesInPipe()))
 179                   Pipe_ClearIN();
 180
 181                 bool NoteOnEvent  = (MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON));
 182                 bool NoteOffEvent = (MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_OFF));
 183
 184                 if (NoteOnEvent || NoteOffEvent)
 185                 {
 186                         printf_P(PSTR("MIDI Note %s - Channel %d, Pitch %d, Velocity %d\r\n"), NoteOnEvent ? "On" : "Off",
 187                                                                                                                                                                    ((MIDIEvent.Data1 & 0x0F) + 1),
 188                                                                                                                                                                    MIDIEvent.Data2, MIDIEvent.Data3);
 189                 }
 190         }
 191
 192         Pipe_Freeze();
 193
 194         Pipe_SelectPipe(MIDI_DATA_OUT_PIPE);
 195         Pipe_Unfreeze();
 196
 197         if (Pipe_IsOUTReady())
 198         {
 199                 uint8_t MIDICommand = 0;
 200                 uint8_t MIDIPitch;
 201
 202                 static uint8_t PrevJoystickStatus;
 203                 uint8_t JoystickStatus  = Joystick_GetStatus();
 204                 uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 205
 206                 /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 207                 uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 208
 209                 if (JoystickChanges & JOY_LEFT)
 210                 {
 211                         MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 212                         MIDIPitch   = 0x3C;
 213                 }
 214
 215                 if (JoystickChanges & JOY_UP)
 216                 {
 217                         MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 218                         MIDIPitch   = 0x3D;
 219                 }
 220
 221                 if (JoystickChanges & JOY_RIGHT)
 222                 {
 223                         MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 224                         MIDIPitch   = 0x3E;
 225                 }
 226
 227                 if (JoystickChanges & JOY_DOWN)
 228                 {
 229                         MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 230                         MIDIPitch   = 0x3F;
 231                 }
 232
 233                 if (JoystickChanges & JOY_PRESS)
 234                 {
 235                         MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 236                         MIDIPitch   = 0x3B;
 237                 }
 238
 239                 /* Check if a MIDI command is to be sent */
 240                 if (MIDICommand)
 241                 {
 242                         MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 243                                 {
 244                                         .Event       = MIDI_EVENT(0, MIDICommand),
 245
 246                                         .Data1       = MIDICommand | Channel,
 247                                         .Data2       = MIDIPitch,
 248                                         .Data3       = MIDI_STANDARD_VELOCITY,
 249                                 };
 250
 251                         /* Write the MIDI event packet to the pipe */
 252                         Pipe_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
 253
 254                         /* Send the data in the pipe to the device */
 255                         Pipe_ClearOUT();
 256                 }
 257
 258                 Pipe_Freeze();
 259
 260                 /* Save previous joystick value for next joystick change detection */
 261                 PrevJoystickStatus = JoystickStatus;
 262         }
 263 }
 264