enhanced.c

万龙开发板的原理图和pcb图

#include "fat_include.h"

//-----------------------------------------------------------------------------


//-----------------------------------------------------------------------------
// Prototypes
//-----------------------------------------------------------------------------
void fopen_cluster(UI32 StartCluster);
UI8 fgetc(void);
UI8 feof(void);
void fscanf(char *args, char *string);
void ReadMP3_3(UI32 StartCluster);
void ReadPLS(void);

//-----------------------------------------------------------------------------
// Structures
//-----------------------------------------------------------------------------
struct {
UI16 i;
UI32 clustortemp;
UI32 currentsectornumber;
UI16 bytenum;
UI8 UsedBefore;
UI8 eof;
} MP3System;

//-----------------------------------------------------------------------------
// Functions
//-----------------------------------------------------------------------------

UI8 fgetc(void)
{
 	   // Databyte declaration
	   UI8 datareturn;

	   // If first byte required then load the sector that contains it
	   if (MP3System.bytenum==0)
	   {
	   	      if (SectorReaderV2(MP3System.clustortemp, MP3System.currentsectornumber)) MP3System.eof = 1;
	   }

	   // Copy data from sector buffer
	   datareturn = currentsector[MP3System.bytenum];

	   // Increase pointer in current sector for next load
	   MP3System.bytenum++;

	   // If pointer reaches end of sector, reset and increase sector number
	   if (MP3System.bytenum==512) 
	   {
	   	  	   MP3System.bytenum=0;
			   MP3System.currentsectornumber++;
	   }

	   // Return Data
	   return datareturn;
}


void fopen_cluster(UI32 StartCluster)
{
 	 // Reset MPEG Stream Counters
 	 MP3System.currentsectornumber = 0;
	 MP3System.bytenum = 0;
	 MP3System.clustortemp = StartCluster;
	 MP3System.eof = 0;
	 
	 // Reset FAT Buffer
	 FATBufferV2.firstuse = 1;
	 FATBufferV2.firstsector = 1;
}

//-----------------------------------------------------------------------
// feof: Returns 1 when end of file
//-----------------------------------------------------------------------
UI8 feof(void)
{
 	 return (MP3System.eof);
}

// ----------------------------------------------------------------
// fscanf: Read a line from a file
// ----------------------------------------------------------------
void fscanf(char *args, char *string)
{
	UI8 datalast = 0;
	UI8 datacurrent= 0;
	int stringpntr=0;

	// -------------------------------------------------
	// Find a string
	// -------------------------------------------------
	if (args=="%s")
	{
		while (datacurrent!=0xFF)
			{
			datacurrent = fgetc();
			if ((datalast==0x0D) && (datacurrent==0x0A)) 
				{
				stringpntr--;
				//stringpntr--;
				break;
				}
			string[stringpntr++] = datacurrent;
			datalast = datacurrent;
			}
		string[stringpntr] = '\0';
	}
	// -------------------------------------------------
	// other find types go here
	// -------------------------------------------------
}

//-----------------------------------------------------------------------------
// ReadSector: Version 2
//-----------------------------------------------------------------------------
void ReadMP3_3(UI32 StartCluster)
{
UI8 data;
UI8 exist=0;

	fopen_cluster(StartCluster);
	
	
	do
	{
	if (DREQStatus) 
	   {
	   data = fgetc();
	   exist = 1;
	   }
	   while ((DREQStatus)) ControlCheck();

	   if (exist==0) data = fgetc();
	   MP3SendByte( data );
	   exist=0;
	}
	while ( !feof() );

}

void ReadPLS(void)
{
char string[100];
	char dirpath[100];
	char filename[50];
	UI32 startcluster;


	s3c44b0x_Printf("PlaylistCluster opened 0x%x",fopen("C:\\NEWPLS.TXT"));
	s3c44b0x_Printf("\r\n");	 
    do
	{
	fscanf("%s", string);
 
 	// Split full path into filename and directory path
	split_path(string, dirpath, filename);

	// Find last subdirs start cluster
	startcluster = recursive_dirfind(dirpath);

	// Using dir cluster address search for filename
	startcluster = MatchName(startcluster, filename);
	
	s3c44b0x_Printf("%s",filename);
	s3c44b0x_Printf(" |0x%lx|\r\n",startcluster);
	}
	while (string!=0);
}