main.c

SdCard_V2.1TinyFatFs.rar是单片机实现SD卡功能的FAT文件系统

/*
**********************************************************************************************
* Project:	FS7805 SD CARD READER
* File:		main.c
* Contents: 
*           The main function is SD and MMC card reader.
*
* $Date: 12/15/06    Derek    V1.0  
*  
* 		   This is the SD/MMC card reader firmware.
*		   When read sector,the 512 pingpong FIFO mechanism
*		   is used to improve performance.But when write sector,
*		   only single FIFO is used.
*
* $Date: 12/27/06    Derek    V1.1
*
* 		   The 512 pingpong FIFO mechanism is also used when 
*		   writting sectors.
*
* $Date: 01/09/07    Derek    V1.11
*
* 		   Fix read sector error bug . 
*		   Don't set FIFO_FULL bit in SetBulkInFull() function.
*		   Setting it in BulkSetDmaIn() function.
*
* $Date: 01/18/07    Derek    V1.11
*
*		   Ignor the OUT_OF_RANGE error in SdSendCmd() when
*		   multi read the last block.
*
* $Date: 03/29/07    Derek    V1.2
*
*		   Add TDES module for data encrypt and decrypt.
*          if Macro TDES>0(define in storage.h) this firmware will encrypt/decrypt data when write/read SD Card
*
* $Date: 07/03/07    Derek    V1.21
*
*		   Support HC SD 2.0 card.
*          Add CMD8,CMD6,different read/write command parameter:
*		   for standard capacity card,unit in data address.
*		   for high capacity card,unit in block.
*		   SdHcFlag is used to identify HC SD and other card.
*
* $Date: 07/27/07    Derek    V1.21
*			Fix ILLEGALE_COMMAND bug for some MMC card(PQI MMC,e.g),
*			see sd.c->SdSendCmd() function.
*
* $Date: 08/16/07    Derek    V1.22
*			Add support for SCSI_READ_BUF command.
*			Fix HC SD recognization bug.
*			Card support CMD8(SEND_IF_COND) may be standard V2.00 card or HC SD card.
*			Now we confirm the HC SD from CSD register value.And we get the SD_SPEC
*			version from SCR register(V1.00,V1.10 or V2.00).For V1.10 for higher,
*			send CMD6 command to switch to high speed mode.
*
* $Date: 02/28/08    Lshi    V2.0
*          delete USB related function
*		   add tiny fatfs,read_only function
*
*          only support FAT12&FAT16,support max 2 layer directory
*		   could search file by filename through all the directory 
*
*
*
*
*
* Copyright (c) 2007 Fameg, Inc. All rights reserved
*
* 
***********************************************************************************************
*/
#define ALLOCATE_EXTERN                                // Declare GLOBAL variables and functions

#include "include\Include.h"
#include "tff.h"
#include "diskio.h"

static 	bit SdGetFlashInfoFlag = FALSE;
xdata UINT16 DelayTimer = 0;
bit BusResetFlag = false;
bit BusResetFlagCnt = false;

extern INT8U Configuration;

void Timer0() interrupt 1
{
  // Restore the counter to 10 ms
  //TH0 = 0x9E; //0x9E58,CPU 30M定时10ms
  //TL0 = 0x58;
  TH0         = 0x3C;                                // 0x3CB0, CPU 60MHz, 10ms
  TL0         = 0xB0;

  if (DelayTimer)
    DelayTimer --;

  if (CmdTimer)
    CmdTimer --;

  if (SdGetFlashInfoTimer)
  {
    SdGetFlashInfoTimer --;
    if (SdGetFlashInfoTimer == 0)
      SdGetFlashInfoFlag = true;
  }
}



FATFS fatfsentity;
BYTE Buff[512];			/* Working buffer */
char filename[20];


//search a file through its name
static
FRESULT scan_files (char* path,char* searchname)
{
	DIR dirs;
	FRESULT res;
	int i;
	 FILINFO finfo;

	if ((res = f_opendir(&dirs, path)) == FR_OK) {
		i = strlen(path);
		while (((res = f_readdir(&dirs, &finfo)) == FR_OK) && finfo.fname[0]) {
			if (finfo.fattrib & AM_DIR) {
			//	acc_dirs++;
				*(path+i) = '/'; 
				strcpy(path+i+1, &finfo.fname[0]);
				res = scan_files(path);
				//*(path+i) = '\0';
				if (res != FR_OK) break;
				else return res;
				
			} else {
			
			  /* if(!strcmp(&finfo.fname[0],"3.txt"))
			   {    
			   	   	*(path+i) = '/'; 
					strcpy(path+i+1, &finfo.fname[0]);
			   
			   }	*/

					
				if(!strcmp(&finfo.fname[0],searchname))
			   {    
			   	   	*(path+i) = '/'; 
					strcpy(path+i+1, &finfo.fname[0]);
			
				    strcpy(filename, path);
				
					res = FR_OK;
					return res;
				
				   }

			}
		}
	}

	return res;
} 


void  main (void)
{
	BYTE res;
	FIL file1,file2,file3,file4,file5;		/* File object */
//	WORD br;         // File R/W count


	WORD br1,br2;         // File R/W count
//	DWORD p1;
  //  DIR dirs;
	McuInit();
	Timer0Init(); 
    TdInit();
	StorageInit();
 
	if(!f_mountdrv())
{



	res = f_mkdir("22");


	strcpy(filename, "");
   if(!scan_files (filename,"1.txt"))
   {
   
   
   			res = f_open(&file1, filename, FA_OPEN_EXISTING | FA_READ);
 /*
for (;;) {
        res = f_read(&file1, Buff, 0x200, &br);
        if (res || br == 0) break;      // error or eof      
         }    										   */ 
   }



   	strcpy(filename, "/22/5.txt");
   	res = f_open(&file5, filename, FA_OPEN_ALWAYS | FA_READ | FA_WRITE);



   if(!scan_files (filename,"2.txt"))
   {
   
   
   			res = f_open(&file2, filename, FA_OPEN_ALWAYS | FA_READ | FA_WRITE);
  
   }



for (;;) {
					res = f_read(&file1, Buff, sizeof(Buff), &br1);
					if (res || br1 == 0) break;   /* error or eof */
					res = f_write(&file5, Buff, br1, &br2);
				//	p1 += br2;
					if (res || br2 < br1) break;   /* error or disk full */
				}

	/*
   
 	 strcpy(filename, "");
   if(!scan_files (filename,"5.txt"))
   {
   
   
   			res = f_open(&file1, filename, FA_OPEN_EXISTING | FA_READ);

for (;;) {
        res = f_read(&file1, Buff, 0x200, &br);
        if (res || br == 0) break;      // error or eof
       
    } 

  }
 	 strcpy(filename, "");
   if(!scan_files (filename,"6.txt"))
   {
   
   
   			res = f_open(&file1, filename, FA_OPEN_EXISTING | FA_READ);

for (;;) {
        res = f_read(&file1, Buff, 0x200, &br);
        if (res || br == 0) break;      // error or eof
       
    } 
  }
	
	res = f_open(&file1, "/1/4.txt", FA_OPEN_EXISTING | FA_READ);

for (;;) {
        res = f_read(&file1, Buff, 0x200, &br);
        if (res || br == 0) break;      // error or eof
       
    }  */
	/*
   	res = f_open(&file1, "/1/3.txt", FA_OPEN_EXISTING | FA_READ);

for (;;) {
        res = f_read(&file1, Buff, 0x200, &br);
        if (res || br == 0) break;      // error or eof
       
    } */

// Close all files	 
    f_close(&file1);
 	f_close(&file2);
	f_close(&file3);
	f_close(&file4);
	f_close(&file5);
    // Deactivate FatFs module
    //FatFs = null;
}	
}
  

/*$PAGE*/