Code file for the vs1053_avr_renesas_uno library. More...

#include <vs1053_avr_renesas_uno.h>
#include "SPI.h"
#include <avr/pgmspace.h>

Macros
#define	MIDI_NOTE_ON 9
#define	MIDI_NOTE_OFF 8
#define	MIDI_HDR_CHUNK_ID 0x4D, 0x54, 0x68, 0x64
#define	MIDI_CHUNKSIZE 0, 0, 0, 6
#define	MIDI_FORMAT 0, 0
#define	MIDI_NUMBER_OF_TRACKS 0, 1
#define	MIDI_TIME_DIVISION 0, 96
#define	MIDI_TRACK_CHUNK_ID 0x4D, 0x54, 0x72, 0x6B
#define	MIDI_CHUNK_SIZE 0, 0, 0, sizeof(MIDI_EVENT_NOTE_ON) + sizeof(MIDI_EVENT_NOTE_OFF) + sizeof(MIDI_END_OF_TRACK)
#define	MIDI_EVENT_NOTE_ON 0, (MIDI_NOTE_ON<<4) + MIDI_CHANNEL, MIDI_NOTE_NUMBER, MIDI_INTENSITY
#define	MIDI_EVENT_NOTE_OFF MIDI_NOTE_DURATION, (MIDI_NOTE_OFF<<4) + MIDI_CHANNEL, MIDI_NOTE_NUMBER, MIDI_INTENSITY
#define	MIDI_END_OF_TRACK 0, 0xFF, 0x2F, 0

Functions
char *	strip_nonalpha_inplace (char *s)
	chomp non printable characters out of string.
bool	isFnMusic (char *filename)
	is the filename music

Variables
static const uint16_t bitrate_table[15][6]	PROGMEM
	bitrate lookup table
int8_t	irq = digitalPinToInterrupt(MP3_DREQ)
	External reference to the interrupt identifier for MP3_DREQ.
PROGMEM const uint8_t	SingleMIDInoteFile [] = {MIDI_HDR_CHUNK_ID, MIDI_CHUNKSIZE, MIDI_FORMAT, MIDI_NUMBER_OF_TRACKS, MIDI_TIME_DIVISION, MIDI_TRACK_CHUNK_ID, MIDI_CHUNK_SIZE, MIDI_EVENT_NOTE_ON, MIDI_EVENT_NOTE_OFF, MIDI_END_OF_TRACK}
	a MIDI File of one Note

Detailed Description

Code file for the vs1053_avr_renesas_uno library.

Remarks: comments are implemented with Doxygen Markdown format

Definition in file vs1053_avr_renesas_uno.cpp.

Macro Definition Documentation

◆ MIDI_CHUNK_SIZE

#define MIDI_CHUNK_SIZE 0, 0, 0, sizeof(MIDI_EVENT_NOTE_ON) + sizeof(MIDI_EVENT_NOTE_OFF) + sizeof(MIDI_END_OF_TRACK)

Definition at line 61 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_CHUNKSIZE

#define MIDI_CHUNKSIZE 0, 0, 0, 6

Definition at line 55 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_END_OF_TRACK

#define MIDI_END_OF_TRACK 0, 0xFF, 0x2F, 0

Definition at line 66 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_EVENT_NOTE_OFF

#define MIDI_EVENT_NOTE_OFF MIDI_NOTE_DURATION, (MIDI_NOTE_OFF<<4) + MIDI_CHANNEL, MIDI_NOTE_NUMBER, MIDI_INTENSITY

Definition at line 64 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_EVENT_NOTE_ON

#define MIDI_EVENT_NOTE_ON 0, (MIDI_NOTE_ON<<4) + MIDI_CHANNEL, MIDI_NOTE_NUMBER, MIDI_INTENSITY

Definition at line 63 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_FORMAT

#define MIDI_FORMAT 0, 0

Definition at line 56 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_HDR_CHUNK_ID

#define MIDI_HDR_CHUNK_ID 0x4D, 0x54, 0x68, 0x64

Definition at line 54 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_NOTE_OFF

#define MIDI_NOTE_OFF 8

Definition at line 50 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_NOTE_ON

#define MIDI_NOTE_ON 9

Definition at line 49 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_NUMBER_OF_TRACKS

#define MIDI_NUMBER_OF_TRACKS 0, 1

Definition at line 57 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_TIME_DIVISION

#define MIDI_TIME_DIVISION 0, 96

Definition at line 58 of file vs1053_avr_renesas_uno.cpp.

◆ MIDI_TRACK_CHUNK_ID

#define MIDI_TRACK_CHUNK_ID 0x4D, 0x54, 0x72, 0x6B

Definition at line 60 of file vs1053_avr_renesas_uno.cpp.

Function Documentation

◆ isFnMusic()

bool isFnMusic ( char * filename )

is the filename music

Parameters

[in] filename inspects the end of the filename to be of the extension types that VS10xx can decode.

Returns: boolean true indicating that it is music

Definition at line 2298 of file vs1053_avr_renesas_uno.cpp.

◆ strip_nonalpha_inplace()

char * strip_nonalpha_inplace ( char * s )

chomp non printable characters out of string.

Parameters

[out] s pointer of a char array (aka string)

Returns: char array (aka string) with out whitespaces

Definition at line 2276 of file vs1053_avr_renesas_uno.cpp.

Variable Documentation

◆ irq

int8_t irq = digitalPinToInterrupt(MP3_DREQ)

External reference to the interrupt identifier for MP3_DREQ.

This variable stores the IRQ number corresponding to the MP3_DREQ pin. Defined in vs1053_avr_renesas_uno.cpp and used to handle data refill requests via interrupt. Ensures compatibility across architectures where any pin can serve as an interrupt source.

Definition at line 72 of file vs1053_avr_renesas_uno.cpp.

◆ PROGMEM

const uint16_t bitrate_table [15][6] PROGMEM

static

Initial value:

= {
                 { 0,   0,  0,  0,  0,  0}, 
                 { 32, 32, 32, 32,  8,  8}, 
                 { 64, 48, 40, 48, 16, 16}, 
                 { 96, 56, 48, 56, 24, 24}, 
                 {128, 64, 56, 64, 32, 32}, 
                 {160, 80, 64, 80, 40, 40}, 
                 {192, 96, 80, 96, 48, 48}, 
                 {224,112, 96,112, 56, 56}, 
                 {256,128,112,128, 64, 64}, 
                 {288,160,128,144, 80, 80}, 
                 {320,192,160,160, 96, 69}, 
                 {352,224,192,176,112,112}, 
                 {384,256,224,192,128,128}, 
                 {416,320,256,224,144,144}, 
                 {448,384,320,256,160,160}  
               }

bitrate lookup table

This is a table to decode the bitrate as per the MP3 file format, as read by the SdCard

www.mp3-tech.org

Note: PROGMEM macro forces to Flash space.

Warning: This consums 190 bytes of flash

Definition at line 27 of file vs1053_avr_renesas_uno.cpp.

◆ SingleMIDInoteFile

PROGMEM const uint8_t SingleMIDInoteFile[] = {MIDI_HDR_CHUNK_ID, MIDI_CHUNKSIZE, MIDI_FORMAT, MIDI_NUMBER_OF_TRACKS, MIDI_TIME_DIVISION, MIDI_TRACK_CHUNK_ID, MIDI_CHUNK_SIZE, MIDI_EVENT_NOTE_ON, MIDI_EVENT_NOTE_OFF, MIDI_END_OF_TRACK}

a MIDI File of one Note

This is string containing a complete MIDI format 0 file of one Note ON and then Off.

Description of MIDI file parsing

Note: PROGMEM macro forces to Flash space.

Warning: This should consume 34 bytes of flash

An inline equation $e^{\pi i}+1 = 0$

A displayed equation:

$e^{\pi i}+1 = 0$

Definition at line 90 of file vs1053_avr_renesas_uno.cpp.

Macros

Functions

Variables