Demos/Host/ClassDriver/MIDIHost/MIDIHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  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 /** LUFA MIDI Class driver interface configuration and state information. This structure is
  40  *  passed to all MIDI Class driver functions, so that multiple instances of the same class
  41  *  within a device can be differentiated from one another.
  42  */
  43 USB_ClassInfo_MIDI_Host_t Keyboard_MIDI_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .DataINPipe             =
  48                                         {
  49                                                 .Address        = (PIPE_DIR_IN  | 1),
  50                                                 .Banks          = 1,
  51                                         },
  52                                 .DataOUTPipe            =
  53                                         {
  54                                                 .Address        = (PIPE_DIR_OUT | 2),
  55                                                 .Banks          = 1,
  56                                         },
  57                         },
  58         };
  59
  60
  61 /** Main program entry point. This routine configures the hardware required by the application, then
  62  *  enters a loop to run the application tasks in sequence.
  63  */
  64 int main(void)
  65 {
  66         SetupHardware();
  67
  68         puts_P(PSTR(ESC_FG_CYAN "MIDI Host Demo running.\r\n" ESC_FG_WHITE));
  69
  70         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  71         GlobalInterruptEnable();
  72
  73         for (;;)
  74         {
  75                 JoystickHost_Task();
  76
  77                 MIDI_Host_USBTask(&Keyboard_MIDI_Interface);
  78                 USB_USBTask();
  79         }
  80 }
  81
  82 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  83 void SetupHardware(void)
  84 {
  85         /* Disable watchdog if enabled by bootloader/fuses */
  86         MCUSR &= ~(1 << WDRF);
  87         wdt_disable();
  88
  89         /* Disable clock division */
  90         clock_prescale_set(clock_div_1);
  91
  92         /* Hardware Initialization */
  93         Serial_Init(9600, false);
  94         LEDs_Init();
  95         Buttons_Init();
  96         Joystick_Init();
  97         USB_Init();
  98
  99         /* Create a stdio stream for the serial port for stdin and stdout */
 100         Serial_CreateStream(NULL);
 101 }
 102
 103 /** Task to manage an enumerated USB MIDI device once connected, to display received
 104  *  note events from the host and send note changes in response to the board's joystick.
 105  */
 106 void JoystickHost_Task(void)
 107 {
 108         if (USB_HostState != HOST_STATE_Configured)
 109           return;
 110
 111         MIDI_EventPacket_t MIDIEvent;
 112         while (MIDI_Host_ReceiveEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent))
 113         {
 114                 bool NoteOnEvent  = (MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON));
 115                 bool NoteOffEvent = (MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_OFF));
 116
 117                 /* Display note events from the host */
 118                 if (NoteOnEvent || NoteOffEvent)
 119                 {
 120                         printf_P(PSTR("MIDI Note %s - Channel %d, Pitch %d, Velocity %d\r\n"), NoteOnEvent ? "On" : "Off",
 121                                                                                                                                                                    ((MIDIEvent.Data1 & 0x0F) + 1),
 122                                                                                                                                                                    MIDIEvent.Data2, MIDIEvent.Data3);
 123                 }
 124         }
 125
 126         CheckJoystickMovement();
 127 }
 128
 129 /** Checks for movement of the board's joystick, and sends corresponding MIDI note on/off
 130  *  messages to the host.
 131  */
 132 void CheckJoystickMovement(void)
 133 {
 134         static uint8_t PrevJoystickStatus;
 135
 136         uint8_t MIDICommand = 0;
 137         uint8_t MIDIPitch;
 138
 139         /* Get current joystick mask, XOR with previous to detect joystick changes */
 140         uint8_t JoystickStatus  = Joystick_GetStatus();
 141         uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 142
 143         /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 144         uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 145
 146         if (JoystickChanges & JOY_LEFT)
 147         {
 148                 MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 149                 MIDIPitch   = 0x3C;
 150         }
 151         else if (JoystickChanges & JOY_UP)
 152         {
 153                 MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 154                 MIDIPitch   = 0x3D;
 155         }
 156         else if (JoystickChanges & JOY_RIGHT)
 157         {
 158                 MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 159                 MIDIPitch   = 0x3E;
 160         }
 161         else if (JoystickChanges & JOY_DOWN)
 162         {
 163                 MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 164                 MIDIPitch   = 0x3F;
 165         }
 166         else if (JoystickChanges & JOY_PRESS)
 167         {
 168                 MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 169                 MIDIPitch   = 0x3B;
 170         }
 171
 172         if (MIDICommand)
 173         {
 174                 MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 175                         {
 176                                 .Event       = MIDI_EVENT(0, MIDICommand),
 177
 178                                 .Data1       = MIDICommand | Channel,
 179                                 .Data2       = MIDIPitch,
 180                                 .Data3       = MIDI_STANDARD_VELOCITY,
 181                         };
 182
 183                 MIDI_Host_SendEventPacket(&Keyboard_MIDI_Interface, &MIDIEvent);
 184                 MIDI_Host_Flush(&Keyboard_MIDI_Interface);
 185         }
 186
 187         PrevJoystickStatus = JoystickStatus;
 188 }
 189
 190 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 191  *  starts the library USB task to begin the enumeration and USB management process.
 192  */
 193 void EVENT_USB_Host_DeviceAttached(void)
 194 {
 195         puts_P(PSTR("Device Attached.\r\n"));
 196         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 197 }
 198
 199 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 200  *  stops the library USB task management process.
 201  */
 202 void EVENT_USB_Host_DeviceUnattached(void)
 203 {
 204         puts_P(PSTR("\r\nDevice Unattached.\r\n"));
 205         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 206 }
 207
 208 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 209  *  enumerated by the host and is now ready to be used by the application.
 210  */
 211 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 212 {
 213         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 214
 215         uint16_t ConfigDescriptorSize;
 216         uint8_t  ConfigDescriptorData[512];
 217
 218         if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
 219                                                sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
 220         {
 221                 puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
 222                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 223                 return;
 224         }
 225
 226         if (MIDI_Host_ConfigurePipes(&Keyboard_MIDI_Interface,
 227                                      ConfigDescriptorSize, ConfigDescriptorData) != MIDI_ENUMERROR_NoError)
 228         {
 229                 puts_P(PSTR("Attached Device Not a Valid MIDI Class Device.\r\n"));
 230                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 231                 return;
 232         }
 233
 234         if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 235         {
 236                 puts_P(PSTR("Error Setting Device Configuration.\r\n"));
 237                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 238                 return;
 239         }
 240
 241         puts_P(PSTR("MIDI Device Enumerated.\r\n"));
 242         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 243 }
 244
 245 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 246 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 247 {
 248         USB_Disable();
 249
 250         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 251                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 252
 253         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 254         for(;;);
 255 }
 256
 257 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 258  *  enumerating an attached USB device.
 259  */
 260 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 261                                             const uint8_t SubErrorCode)
 262 {
 263         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 264                                  " -- Error Code %d\r\n"
 265                                  " -- Sub Error Code %d\r\n"
 266                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 267
 268         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 269 }
 270