fileio.h

e1c0df5d-c8bc-48a5-bc02-a2b7c51c0dbf是做mp3的源代码

#ifndef _FILEIO_H

#define _FILEIO_H

#include <avr/io.h>
#include <avr/interrupt.h>
#include <inttypes.h>
#include <string.h>
#include <stdlib.h>
#include <avr/pgmspace.h>
#include <avr/wdt.h>
#include "const.h"
#ifndef MMC
#include "compact.h"
#else
#include "mmc.h"
#endif
#include "lcd.h"

// ID3 tag types
#define TPE1 1
#define TALB 2
#define TRCK 3
#define TIT2 4

extern unsigned long fatstart, rootdir, data, maxsect, dirfilesize, playlistlength;
extern unsigned char secpercluster, attrib;
extern unsigned int heads, sectors_per_track, dircluster, filecluster, playtime;
extern unsigned int playlistptr, playlistcl;
extern unsigned char filename[50];
extern unsigned char artalb[50];
extern unsigned char dirname[16];
extern unsigned char lcd_upd, file_bitrate;
extern char artalbpos, titlepos, artalbdir, titledir, scrolltimer;

static unsigned char bitrate[] __attribute__ ((progmem)) =
 {4, 4, 4, 4, 4, 1,
  8, 6, 5, 8, 6, 2,
  12, 7, 6, 12, 7, 3,
  16, 8, 7, 16, 8, 4,
  20, 10, 8, 20, 10, 8,
  24, 12, 10, 24, 12, 10,
  28, 14, 12, 28, 14, 7,
  32, 16, 14, 32, 16, 8,
  36, 20, 16, 36, 20, 16,
  40, 24, 20, 40, 24, 20,
  44, 28, 24, 44, 28, 14,
  48, 32, 28, 48, 32, 16,
  52, 40, 32, 52, 40, 32,
  56, 48, 40, 56, 48, 40};


struct __attribute__((packed)) boot_record
{
unsigned char jump[3];
unsigned char oem[8];
unsigned int bytes_per_sector;
unsigned char sectors_per_cluster;
unsigned int reserved_sectors;
unsigned char number_of_fats;
unsigned int root_direntries;
unsigned int small_sects;
unsigned char media_desc;
unsigned int sec_per_fat;
unsigned int sec_per_track;
unsigned int num_heads;
unsigned long num_hidden_sec;
unsigned long sec_per_part;
unsigned int logical_nr;
unsigned char ext_signature;
unsigned long serial_no;
unsigned char volume_label[11];
unsigned char fat_name[8];
unsigned char exec[448];
unsigned int exec_mark;
};

struct __attribute__((packed)) attr
{
int read_only: 1;
int hidden: 1;
int system: 1;
int volume_label: 1;
int directory: 1;
int archive: 1;
int reserved: 2;
};


struct __attribute__((packed)) entry
{
  unsigned char filename[8];
  unsigned char ext[3];
  unsigned char attribute;
  unsigned char res;
  unsigned char timestamp;
  unsigned long creation;
  unsigned int last_access;
  unsigned int ea_index;
  unsigned long mod_time;
  unsigned int filecluster;
  unsigned long filesize;
};
#ifdef MMC	// wrapper for MMC_Read for checking lba <= maxsect
unsigned char MMC_Read_Wrapper(unsigned long lba);
#endif
int get_disk_parms();				// fetch cf parameter & fat
unsigned int get_next_cluster(unsigned int lastcl);		// locates next file cluster
unsigned int get_next_direntry(unsigned int dircluster, unsigned int num, char dir, unsigned char type, unsigned char get_id3);
unsigned char get_next_playlist_entry(unsigned char playlistid, char dir);
unsigned char get_lfn(unsigned int dirid);
void get_id3_info(unsigned int startcl);
char parse_tag(unsigned long * offs, unsigned char * buffer);

#endif