106 lines
3.4 KiB
C
106 lines
3.4 KiB
C
|
/*
|
||
|
|
LUFA Library
|
||
|
|
Copyright (C) Dean Camera, 2017.
|
||
|
|
|
||
|
|
dean [at] fourwalledcubicle [dot] com
|
||
|
|
www.lufa-lib.org
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright 2017 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 disclaims 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 <avr/pgmspace.h>
|
||
|
|
#include <avr/interrupt.h>
|
||
|
|
#include <stdbool.h>
|
||
|
|
|
||
|
|
#include "Descriptors.h"
|
||
|
|
#include "Config/AppConfig.h"
|
||
|
|
|
||
|
|
#include <LUFA/Drivers/Board/LEDs.h>
|
||
|
|
#include <LUFA/Drivers/USB/USB.h>
|
||
|
|
#include <LUFA/Platform/Platform.h>
|
||
|
|
|
||
|
|
/* Macros: */
|
||
|
|
/** 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)
|
||
|
|
|
||
|
|
/** Scale factor used to convert the floating point frequencies and ratios into a fixed point number */
|
||
|
|
#define SCALE_FACTOR 65536
|
||
|
|
|
||
|
|
/** Base (lowest) allowable MIDI note frequency */
|
||
|
|
#define BASE_FREQUENCY 27.5
|
||
|
|
|
||
|
|
/** Ratio between each note in an octave */
|
||
|
|
#define NOTE_OCTIVE_RATIO 1.05946
|
||
|
|
|
||
|
|
/** Lowest valid MIDI pitch index */
|
||
|
|
#define BASE_PITCH_INDEX 21
|
||
|
|
|
||
|
|
/** Number of samples in the virtual sample table (can be expanded to lower maximum frequency, but allow for
|
||
|
|
* more simultaneous notes due to the reduced amount of processing time needed when the samples are spaced out)
|
||
|
|
*/
|
||
|
|
#define VIRTUAL_SAMPLE_TABLE_SIZE 512
|
||
|
|
|
||
|
|
/** Sample table increments per period for the base MIDI note frequency */
|
||
|
|
#define BASE_INCREMENT (((F_CPU / VIRTUAL_SAMPLE_TABLE_SIZE / 2) / BASE_FREQUENCY))
|
||
|
|
|
||
|
|
/* Type Defines: */
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
uint8_t LRUAge;
|
||
|
|
uint8_t Pitch;
|
||
|
|
uint32_t TableIncrement;
|
||
|
|
uint32_t TablePosition;
|
||
|
|
} DDSNoteData;
|
||
|
|
|
||
|
|
/* Function Prototypes: */
|
||
|
|
void SetupHardware(void);
|
||
|
|
|
||
|
|
void EVENT_USB_Device_Connect(void);
|
||
|
|
void EVENT_USB_Device_Disconnect(void);
|
||
|
|
void EVENT_USB_Device_ConfigurationChanged(void);
|
||
|
|
void EVENT_USB_Device_UnhandledControlRequest(void);
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|