[原創(chuàng)]開源51單片機(jī)通過FAT32讀取硬盤模擬DOS命令 Proteus程序

ID:405708 · 發(fā)表于 2018-10-10 19:59

可通過UISO查看鏡像文件，感興趣的小伙伴們可以完善程序，添加一些有趣的命令。

仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）

單片機(jī)源程序如下:

#include "../config.h"
INT8U xdata BufDat[512];
FATInfo xdata BPBInfo;
FILE xdata *FileInfo;
INT8U OpenFileFlag;
void Read_Sector(INT32U offset)
{
read_IDE_DAT_sector(offset,&BufDat[0]);
}
INT32U B2S(INT32U Data,INT8U DataLen) //小端轉(zhuǎn)為大端
{
INT32U temp=0;
INT32U fact=1;
INT8U i;
Data <<= ((4 - DataLen) * 8);
for(i=0;i<DataLen;i++)
{
temp += ((INT8U*)&(Data))[i] * fact;
fact *= 256;
}
return temp;
}
Get_FatInfo(INT32U offset)
{
DBR *Bpb = (DBR*)BufDat;
Read_Sector(offset);
BPBInfo.FATSectors = B2S(Bpb -> BPB_FATSz32,4); //一個(gè)FAT表所占的扇區(qū)數(shù)
BPBInfo.BytePerSector = B2S(Bpb -> BPB_BytesPerSec,2); //每扇區(qū)字節(jié)數(shù)
BPBInfo.SectorsPerClust = Bpb -> BPB_SecPerClus; //第簇扇區(qū)數(shù)
BPBInfo.FirstDirClust = B2S(Bpb -> BPB_RootClus,4); //根目錄在第幾簇
BPBInfo.FirstFATSector = B2S(Bpb -> BPB_RsvdSecCnt,2); //第一個(gè)FAT表的位置
BPBInfo.RootDirSector = BPBInfo.FirstFATSector + (BPBInfo.FATSectors * Bpb -> BPB_NumFATs); //根目錄在哪個(gè)扇區(qū)
}
Get_File(INT32U offset)
{
FILE xdata *FileInfo;
Read_Sector(BPBInfo.RootDirSector);
FileInfo = (FILE*)&BufDat[offset];
if((FileInfo -> FileAttributes == (ATTR_READ_ONLY|ATTR_HIDDEN|ATTR_SYSTEM|ATTR_VOLUME_ID))||(FileInfo -> FileName[0] == NOPDIR)||(FileInfo -> FileName[0] == NOPDIRF))return;
Prints(FileInfo -> FileName,8);
if(FileInfo -> FileAttributes != ATTR_DIRECTORY)
{
Prints(".",513);
Prints(FileInfo -> FileExtension,3);
Prints(" is ",513);
Prints(FileInfo -> FileExtension,3);
Prints(" File",513);
}else{Prints(" is Direct",513);}
Prints("\x0d\x0a",2);
}
INT32U FindNextClust(INT32U Clust)
{
INT32U *NextClust;
Read_Sector(BPBInfo.FirstFATSector+(INT32U)((Clust*4)/512));
NextClust = &BufDat[Clust*4];
return B2S(NextClust[0],4);
}
INT32U Sector2Clust(INT32U NowSector)
{
return NowSector/BPBInfo.SectorsPerClust;
}
INT32U Clust2Sector(INT32U Clust)
{
return Clust*BPBInfo.SectorsPerClust;
}
void OpenTxtFile()
{
INT16U i;
INT32U FileRootSector;
INT32U FileRootClust;
INT32U NextClust;
Read_Sector(BPBInfo.RootDirSector);
// Prints("Start Open ",513);
// Prints(FileInfo -> FileName,8);
// Prints(".",1);
// Prints(FileInfo -> FileExtension,3);
// Prints(" File\x0d\x0a",513);
FileRootClust = (INT32U)(B2S(FileInfo -> FileHighClust,2))<<16|(INT32U)(B2S(FileInfo -> FileLowClust,2));
FileRootSector = Clust2Sector(FileRootClust-BPBInfo.FirstDirClust)+BPBInfo.RootDirSector;
while(NextClust != FileOverClust)
{
for(i=0;i<BPBInfo.SectorsPerClust;i++)
{
Read_Sector(Clust2Sector(FileRootClust-BPBInfo.FirstDirClust)+BPBInfo.RootDirSector+i);
Prints(BufDat,512);
}
NextClust = FindNextClust(FileRootClust);
FileRootClust = NextClust;
}
}
void Disp_FileCreateDate()
{
INT8U xdata TimeBuf[11];
INT8U month,day;
INT16U year;
year = (B2S(FileInfo -> FileMDate,2)&0xf800)>>9;
year+=1980;
month = (B2S(FileInfo -> FileMDate,2)&0x1e0)>>5;
day = (B2S(FileInfo -> FileMDate,2)&0x001f);
TimeBuf[0] = year/1000+'0';
TimeBuf[1] = year%1000/100+'0';
TimeBuf[2] = year%1000%100/10+'0';
TimeBuf[3] = year%10+'0';
TimeBuf[4] = '-';
TimeBuf[5] = month/10+'0';
TimeBuf[6] = month%10+'0';
TimeBuf[7] = '-';
TimeBuf[8] = day/10+'0';
TimeBuf[9] = day%10+'0';
Prints("\r\n",513);
Prints(TimeBuf,11);
}
void Disp_FileCreateTime()
{
INT8U xdata TimeBuf[5];
INT8U hour,mine;
hour = (B2S(FileInfo -> FileMTime,2)&0xf800)>>11;
mine = (B2S(FileInfo -> FileMTime,2)&0x07e0)>>5;
TimeBuf[0] = hour/10+'0';
TimeBuf[1] = hour%10+'0';
TimeBuf[2] = ':';
TimeBuf[3] = mine/10+'0';
TimeBuf[4] = mine%10+'0';
Prints(" ",513);
Prints(TimeBuf,5);
Prints(" ",513);
}
void int2string(INT32U dat,INT8U *buf)
{
INT8U temp;
if(dat<1024);
{
temp = 0;
}
if((dat>=1024)&&(dat<1048576))
{
dat/=1024;
temp = 1;
}
if(dat>=(1048576)&&dat<1073741824)
{
dat/=1048576;
temp = 2;
}
if(dat>=1073741824)
{
dat/=1073741824;
temp = 3;
}
buf[2] =dat%10 + '0';
buf[1] = dat%100/10 + '0';
buf[0] = dat%1000/100 +'0';
Prints(buf,3);
switch(temp)
{
case 0:
Prints("B ",513);
break;
case 1:
Prints("KB",513);
break;
case 2:
Prints("MB",513);
break;
case 3:
Prints("GB",513);
break;
}
}
INT8U FindFile(INT8U *FileName,INT8U *FileExtension)
{
INT32U NowClust,NextClust,Sector,offset;
INT32U xdata FileSize;
INT8U xdata FILESIZEBUF[4];
INT8U FileNum,DirNum;
NowClust=BPBInfo.FirstDirClust;
while(NowClust!=FileOverClust)
{
for(Sector=0;Sector<BPBInfo.SectorsPerClust;Sector++)
{
Read_Sector(BPBInfo.RootDirSector+Clust2Sector(NextClust) + Sector);
for(offset=0;offset<16;offset++)
{
FileInfo = (FILE*)&BufDat[offset*32];
if((FileInfo -> FileAttributes == (ATTR_READ_ONLY|ATTR_HIDDEN|ATTR_SYSTEM|ATTR_VOLUME_ID))||(FileInfo -> FileName[0] == NOPDIR)||(FileInfo -> FileName[0] == NOPDIRF))continue;
{
if((strncmp(FileName,FileInfo -> FileName,8) == 0)||(FileName[0] == '*'))
if((strncmp(FileExtension,FileInfo -> FileExtension,3) == 0)||(FileExtension[0] == '*'))
{
if(OpenFileFlag == 0)
{
FileSize = B2S(FileInfo -> FileSize,4);
Disp_FileCreateDate();
Disp_FileCreateTime();
if(FileInfo -> FileAttributes == ATTR_DIRECTORY)Prints("<DIR> ",513);
else
{
int2string(FileSize,&FILESIZEBUF[0]);
Prints(" ",513);
}
Prints(FileInfo -> FileName,8);
if(FileInfo -> FileAttributes != ATTR_DIRECTORY)
{
Prints(".",513);
Prints(FileInfo -> FileExtension,3);
FileNum++;
}else DirNum++;
}
else return 1;
if((FileName[0] != '*')&&(FileExtension[0] != '*'))return 1;
}
}
}
}
NextClust=FindNextClust(NowClust);
NowClust=NextClust;
}
if(OpenFileFlag != 1)
{
Prints("\r\n ",513);
FILESIZEBUF[0] = FileNum/100+'0';
FILESIZEBUF[1] = FileNum%100/10+'0';
FILESIZEBUF[2] = FileNum%10+'0';
Prints(FILESIZEBUF,3);
Prints(" File(s)",513);
……………………
…………限于本文篇幅余下代碼請(qǐng)從51黑下載附件…………

復(fù)制代碼

所有資料51hei提供下載:

psufs.rar (1.87 MB, 下載次數(shù): 45)

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[原創(chuàng)]開源51單片機(jī)通過FAT32讀取硬盤模擬DOS命令 Proteus程序

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