format.lst

MP3播放器和U盘功能的源代码。采用集成了MP3解码芯片和USB接口芯片的AT89C51SND1C单片机

C51 COMPILER V7.50   FORMAT                                                                02/08/2007 11:18:10 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE FORMAT
OBJECT MODULE PLACED IN FORMAT.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE FORMAT.C LARGE BROWSE DEBUG OBJECTEXTEND

line level    source

   1          
   2          #include "REGSND1.H"
   3          #include "USBDEF.H"
   4          #define Root_Cluster    (0)                             //MBR所在的簇号
   5          #define Data_Cluster    (1)                             //数据真正开始的扇区
   6          
   7          #define BPB_Sector      (0)
   8          #define Fat_Sector      (BPB_Sector + 1)
   9          #define Directory_Sector        (Fat_Sector + 4)
  10          unsigned char Page_Buf1[512];
  11          extern void delay();
  12          extern void Flash_Reset(void);
  13          extern void ReadPage(unsigned int block, unsigned int page, unsigned char *pPage);
  14          code unsigned char BPB_Data[512] = {
  15                                  0xeb, 0x3c, 0x90,//     Offset_U8_BS_jmpBoot            0
  16                                  'L', 'u', 'q', 'I', 'H', 'u', 'a', 'j',// Offset_U8_BS_OEMName          3
  17                                  0x00, 0x02,// Offset_short int_BPB_BytsPerSec   11      //Count of bytes per sector. This value may take on on
             -ly the  //
  18          //512                                                                   //following values: 512, 1024, 2048 or 4096. If maximum       //
  19                                                                                          //compatibility is desired, only the value 512 should be used.//
  20                                  64,// Offset_U8_BPB_SecPerClus  13      //Number of sectors per allocation unit. This value must be a //
  21                                                                                          //power of 2 that is greater than 0. The legal values are 1,  //
  22                                                                                          //      2, 4, 8, 16, 32, 64,and 128.                                //
  23                                  0x1, 0x00,// Offset_short int_BPB_RsvdSecCnt    14      //Number of reserved sectors in the Reserved region of 
             -the    //
  24                                                                                          //volume starting at the first sector of the volume.For FAT32 //
  25                                                                                          //volumes, this value is typically 32.                        //
  26                                  0x02,// Offset_U8_BPB_NumFATs           16      //The count of FAT data structures on the volume.             //
  27                                  0x02, 0x00,//0xb0, 0x03,// Offset_short int_BPB_RootEntCnt      17      //Is only useful for FAT12 and FAT16 volu
             -mes.                 //
  28          //                                                                              //For FAT32 volumes,this field must be set to 0.              //
  29          //通过调整文件项为03b0，从而使数据扇区刚好从Block2Sector0开始，但
  30          //文件分区表中根目录区并为标记为已占用。数据实际从Block4Sector0开始
  31                                  0xff,   0x3f, //0xea,   0x7f, //Offset_short int_BPB_TotSec16           19      //For FAT12 and FAT16 volumes, this field
             - contains the sector //
  32                                                                                          //count, and BPB_TotSec32 is 0 if the total sector count fits //
  33                                                                                          //(is less than 0x10000).                                     //
  34                                  0xf8,// Offset_U8_BPB_Media                     21      //0xF8 is the standard value for fixed(non-removable) media.  //
  35                                                                                          //For removable media, 0xF0 is frequently used.               //
  36                                  0x02, 0x00,// Offset_short int_BPB_FATSz16              22      //This field is FAT12/FAT16 16bit count of sectors occup
             -ied by//
  37                                                                                          //      1 FAT.On FAT32 volumes this field must be 0, and BPB_FATSz32//
  38                                                                                          //contains the FAT size count.                                //
  39                                  0x00, 0x00,// Offset_short int_BPB_SecPerTrk    24      //Sectors per track for interrupt 0x13. This field is o
             -nly    //
  40                                                                                          //relevant for media that have a geometry (volume is broken   //
  41                                                                                          //down into tracks by multiple heads and cylinders) and are   //
  42                                                                                          //visible on interrupt 0x13.This field contains the           //
  43                                                                                          //"sectors per track" geometry value.                         //
  44                                  0x00, 0x00,// Offset_short int_BPB_NumHeads             26      //Number of heads for interrupt 0x13. This field is rel
             -evant  //
  45                                                                                          //as discussed earlier for BPB_SecPerTrk.                     //
  46                                  0x01, 0x00, 0x00, 0x00,// Offset_U32_BPB_HiddSec                28      //Count of hidden sectors preceding the partition 
             -that        //
  47                                                                                          //contains this FAT volume.                                   //
C51 COMPILER V7.50   FORMAT                                                                02/08/2007 11:18:10 PAGE 2   

  48                                  0x00, 0x00, 0x00, 0x00,// Offset_U32_BPB_TotSec32               32      //This field is the new 32-bit total count of sec
             -tors on the  //
  49                                                                                          //volume. This count includes the count of all sectors in all //
  50                                                                                          //four regions of the volume. This field can be 0; if it is 0,//
  51                                                                                          //then BPB_TotSec16 must be non-zero. For FAT32 volumes, this //
  52                                                                                          //field must be non-zero. For FAT12/FAT16 volumes, this field //
  53                                                                                          //contains the sector count if BPB_TotSec16 is 0 (count is    //
  54                                                                                          //greater than or equal to 0x10000).//
  55                                  0x00,// Offset_U8_BS_DrvNum             36      //This field is the FAT32 32-bit count of sectors occupied by //
  56                  //根据该值得到FAT的大小//                               //ONE FAT. BPB_FATSz16 must be 0.                             //
  57                  
  58                                  0x00,// Offset_U8_BS_Reserved           37      //    Bits 0-3 -- Zero-based number of active FAT.Only valid  //
  59                                                                                          //                if mirroring is disabled.                   //
  60                                                                                          //    Bits 4-6 -- Reserved.                                   //
  61                                                                                          //    Bit 7    -- 0 means the FAT is mirrored at runtime into //
  62                                                                                          //                  all FATs.                                 //
  63                                                                                          //             -- 1 means only one FAT is active;it is the one//
  64                                                                                          //                  referenced in bits 0-3.                   //
  65                                                                                          //    Bits 8-15 -- Reserved.                                  //
  66                                  0x29,// Offset_U8_BS_BootSig            38      //High byte is major revision number.                         //
  67                                                                                          //Low byte is minor revision number.                          //
  68                                  'N', 'A', 'M', 'E',// Offset_U32_BS_VolID               39      //This is set to the cluster number of the first cluster 
             -of   //
  69                  //根据该值得到ROOT的地址//                              //the root directory, usually 2 but not required to be 2.     //
  70                  
  71                                  'N', 'O', ' ', 'N', 'A', 'M', 'E', ' ', ' ', ' ', ' ',// Offset_U2048_BS_VolLab         43      //Sector number of 
             -FSINFO structure in the reserved area of   //
  72                                                                                          //the FAT32 volume.Usually 1.                                 //