C51 COMPILER V8.02   DEVICE                                                                04/29/2007 12:48:54 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE DEVICE
OBJECT MODULE PLACED IN DEVICE.OBJ
COMPILER INVOKED BY: D:\Keil\C51\BIN\C51.EXE DEVICE.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include "common.h"
   2          #include "DEVICE.H"
   3          #include "HAL.H"
   4          #include "HPI.H"
   5          #include "HPI32.H"
   6          
   7          //////////////////////////////////
   8          extern unsigned char xdata DBUF[BUFFER_LENGTH];
   9          extern SYS_INFO_BLOCK xdata DeviceInfo;
  10          extern FILE_INFO xdata ThisFile;
  11          extern unsigned int xdata DirStartCluster;
  12          extern unsigned long xdata DirStartCluster32;
  13          
  14          unsigned char xdata DBUF[BUFFER_LENGTH];
  15                  
  16          ///////////////////////////////////////////////////////////////////////////
  17          unsigned char InitFileSystem(void)
  18          {
  19   1              unsigned int ReservedSectorsNum;
  20   1      
  21   1              ////////////////////////////////////////////////////
  22   1              DeviceInfo.BPB_BytesPerSec=512; //暫假設為512
  23   1              
  24   1      
  25   1              ////////////////////////////////////////////////////
  26   1              if(!SdReadSector(0x0,1,DBUF))
  27   1                      return FALSE;
  28   1          if(DBUF[510] != 0x55 || DBUF[511] != 0xaa) return FALSE;
  29   1      
  30   1              //////////////////////////////////
  31   1              if(DBUF[0]==0xeb||DBUF[0]==0xe9)
  32   1                      {
  33   2                      DeviceInfo.StartSector=0;
  34   2                      }
  35   1              else
  36   1                      {
  37   2                       if(DBUF[446] != 0x80 && DBUF[446] != 0)  return FALSE;
  38   2                       DeviceInfo.StartSector=LSwapINT32(DBUF[454],DBUF[455],DBUF[456],DBUF[457]);
  39   2                      }
  40   1              ///////////////////////////////////////////////////////
  41   1              if(!SdReadSector(DeviceInfo.StartSector,1,DBUF))
  42   1                      return FALSE;
  43   1              
  44   1              if(DBUF[510] != 0x55 || DBUF[511] != 0xaa) return FALSE;
  45   1      
  46   1              DeviceInfo.BPB_BytesPerSec=LSwapINT16(DBUF[11],DBUF[12]);
  47   1              DeviceInfo.BPB_SecPerClus=DBUF[13];
  48   1              ReservedSectorsNum=LSwapINT16(DBUF[14],DBUF[15]);
  49   1              DeviceInfo.BPB_NumFATs=DBUF[16];
  50   1      
  51   1              if(DBUF[82]=='F'&&DBUF[83]=='A'&&DBUF[84]=='T'&&DBUF[85]=='3'&&DBUF[86]=='2')
  52   1              {
  53   2                      DeviceInfo.BPB_RootEntCnt=LSwapINT16(DBUF[17],DBUF[18]);
  54   2                      DeviceInfo.BPB_RootEntCnt=(DeviceInfo.BPB_RootEntCnt)*32/DeviceInfo.BPB_BytesPerSec;
  55   2                      DeviceInfo.BPB_TotSec32=LSwapINT32(DBUF[32],DBUF[33],DBUF[34],DBUF[35]);
C51 COMPILER V8.02   DEVICE                                                                04/29/2007 12:48:54 PAGE 2   

  56   2                      DeviceInfo.BPB_FATSz32=LSwapINT32(DBUF[36],DBUF[37],DBUF[38],DBUF[39]);
  57   2                      DeviceInfo.RootStartCluster=LSwapINT32(DBUF[44],DBUF[45],DBUF[46],DBUF[47]);
  58   2                      DeviceInfo.FatStartSector=DeviceInfo.StartSector+ReservedSectorsNum;
  59   2                      DeviceInfo.FirstDataSector=DeviceInfo.FatStartSector+DeviceInfo.BPB_NumFATs*DeviceInfo.BPB_FATSz32;
  60   2                      //DeviceInfo.TotCluster=(DeviceInfo.BPB_TotSec32-DeviceInfo.FirstDataSector+1)/DeviceInfo.BPB_SecPerClus
             -+1;
  61   2                      DeviceInfo.TotCluster=(DeviceInfo.BPB_TotSec32-ReservedSectorsNum-DeviceInfo.BPB_NumFATs*DeviceInfo.BPB_
             -FATSz32-DeviceInfo.BPB_RootEntCnt)/DeviceInfo.BPB_SecPerClus;
  62   2                      DirStartCluster32=DeviceInfo.RootStartCluster;
  63   2                      DeviceInfo.FAT=1;       //FAT16=0,FAT32=1;
  64   2                      
  65   2              }
  66   1              else
  67   1              {               
  68   2                      DeviceInfo.BPB_RootEntCnt=LSwapINT16(DBUF[17],DBUF[18]);
  69   2                      DeviceInfo.BPB_RootEntCnt=(DeviceInfo.BPB_RootEntCnt)*32/DeviceInfo.BPB_BytesPerSec;    
  70   2                      DeviceInfo.BPB_TotSec16=LSwapINT16(DBUF[19],DBUF[20]);  
  71   2                      if(DeviceInfo.BPB_TotSec16==0)
  72   2                        DeviceInfo.BPB_TotSec16=LSwapINT32(DBUF[32],DBUF[33],DBUF[34],DBUF[35]);
  73   2                      DeviceInfo.BPB_FATSz16=LSwapINT16(DBUF[22],DBUF[23]);                   
  74   2                      DeviceInfo.FatStartSector=DeviceInfo.StartSector+ReservedSectorsNum;
  75   2                      DeviceInfo.RootStartSector=DeviceInfo.StartSector+DeviceInfo.BPB_NumFATs*DeviceInfo.BPB_FATSz16+Reserved
             -SectorsNum;        
  76   2                      DeviceInfo.FirstDataSector=DeviceInfo.FatStartSector+DeviceInfo.BPB_NumFATs*DeviceInfo.BPB_FATSz16+Devic
             -eInfo.BPB_RootEntCnt;
  77   2                      DeviceInfo.TotCluster=(DeviceInfo.BPB_TotSec16-DeviceInfo.BPB_RootEntCnt-DeviceInfo.BPB_NumFATs*DeviceIn
             -fo.BPB_FATSz16-1)/DeviceInfo.BPB_SecPerClus;
  78   2              if(DeviceInfo.TotCluster<4085) return FALSE;    //FAT12 不被支持
  79   2                      DeviceInfo.FAT=0;
  80   2              }               
  81   1              ///////////////////////////////////////////////////////
  82   1              ThisFile.bFileOpen=0;   
  83   1              ///////////////////////////////////////////////////////
  84   1              return TRUE;
  85   1      }
  86          
  87          unsigned char SdReadSector(unsigned long sector,unsigned char len,unsigned char *pBuffer)
  88          {
  89   1              while(len--)
  90   1               {
  91   2                if(SdReadBlock(pBuffer,sector<<9)==0) 
  92   2                   return 0;
  93   2            pBuffer+=512;
  94   2               }
  95   1        return 1;
  96   1      }
  97          
  98          unsigned char SdWriteSector(unsigned long sector,unsigned char len,unsigned char *pBuffer)
  99          {
 100   1              while(len--)
 101   1               {
 102   2                if(SdWriteBlock(pBuffer,sector<<9)==0) return 0;
 103   2            pBuffer+=512;
 104   2               }
 105   1       return 1;  
 106   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =   1439    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   8192    ----
C51 COMPILER V8.02   DEVICE                                                                04/29/2007 12:48:54 PAGE 3   

   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      18
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)