text: /*
               LUFA Library
       Copyright (C) Dean Camera, 2010.
                
    dean [at] fourwalledcubicle [dot] com
        www.fourwalledcubicle.com
  */
  
  /*
    Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  
    Permission to use, copy, modify, distribute, and sell this 
    software and its documentation for any purpose is hereby granted
    without fee, provided that the above copyright notice appear in 
    all copies and that both that the copyright notice and this
    permission notice and warranty disclaimer appear in supporting 
    documentation, and that the name of the author not be used in 
    advertising or publicity pertaining to distribution of the 
    software without specific, written prior permission.
  
    The author disclaim all warranties with regard to this
    software, including all implied warranties of merchantability
    and fitness.  In no event shall the author be liable for any
    special, indirect or consequential damages or any damages
    whatsoever resulting from loss of use, data or profits, whether
    in an action of contract, negligence or other tortious action,
    arising out of or in connection with the use or performance of
    this software.
  */
  
  /** \file
   *
   *  Header file for AudioOutput.c.
   */
   
  #ifndef _AUDIO_OUTPUT_H_
  #define _AUDIO_OUTPUT_H_
  
  	/* Includes: */
  		#include <avr/io.h>
  		#include <avr/wdt.h>
  		#include <avr/power.h>
  		#include <stdbool.h>
  
  		#include "Descriptors.h"
  				
  		#include <LUFA/Version.h>
  		#include <LUFA/Drivers/USB/USB.h>
  		#include <LUFA/Drivers/Board/Joystick.h>
  		#include <LUFA/Drivers/Board/LEDs.h>
  		#include <LUFA/Drivers/Board/Buttons.h>
  
     /* Macros: */
  		/** MIDI command for a note on (activation) event */
  		#define MIDI_COMMAND_NOTE_ON      0x90
  
  		/** MIDI command for a note off (deactivation) event */
  		#define MIDI_COMMAND_NOTE_OFF     0x80
  
  		/** Standard key press velocity value used for all note events, as no pressure sensor is mounted */
  		#define MIDI_STANDARD_VELOCITY    64
  		
  		/** Convenience macro. MIDI channels are numbered from 1-10 (natural numbers) however the logical channel
  		 *  addresses are zero-indexed. This converts a natural MIDI channel number into the logical channel address.
  		 *
  		 *  \param[in] channel  MIDI channel number to address
  		 */
  		#define MIDI_CHANNEL(channel)    ((channel) - 1)
  
  		/** LED mask for the library LED driver, to indicate that the USB interface is not ready. */
  		#define LEDMASK_USB_NOTREADY      LEDS_LED1
  
  		/** LED mask for the library LED driver, to indicate that the USB interface is enumerating. */
  		#define LEDMASK_USB_ENUMERATING  (LEDS_LED2 | LEDS_LED3)
  
  		/** LED mask for the library LED driver, to indicate that the USB interface is ready. */
  		#define LEDMASK_USB_READY        (LEDS_LED2 | LEDS_LED4)
  
  		/** LED mask for the library LED driver, to indicate that an error has occurred in the USB interface. */
  		#define LEDMASK_USB_ERROR        (LEDS_LED1 | LEDS_LED3)
  
  	/* Type Defines: */
  		/** Type define for a USB MIDI event packet, used to encapsulate sent and received MIDI messages from a USB MIDI interface. */
  		typedef struct
  		{
  			unsigned char Command     : 4; /**< MIDI command being sent or received in the event packet */
  			unsigned char CableNumber : 4; /**< Virtual cable number of the event being sent or received in the given MIDI interface */
  			
  			uint8_t Data1; /**< First byte of data in the MIDI event */
  			uint8_t Data2; /**< Second byte of data in the MIDI event */
  			uint8_t Data3; /**< Third byte of data in the MIDI event */		
  		} USB_MIDI_EventPacket_t;
  		
     /* Function Prototypes: */
  		void SetupHardware(void);
  		void MIDI_Task(void);
     
  		void EVENT_USB_Device_Connect(void);
  		void EVENT_USB_Device_Disconnect(void);
  		void EVENT_USB_Device_ConfigurationChanged(void);
  		
  #endif
  