?? fat32.lst
字號(hào):
C51 COMPILER V7.06 FAT32 08/10/2005 23:36:36 PAGE 1
C51 COMPILER V7.06, COMPILATION OF MODULE FAT32
OBJECT MODULE PLACED IN Fat32.OBJ
COMPILER INVOKED BY: D:\Keil51\C51\BIN\C51.EXE Fat32.c BROWSE DEBUG OBJECTEXTEND
stmt level source
1 #include "common.h"
2 #include "Fat.h"
3 #include "Fat32.h"
4 #include "SL811.H"
5 #include "TPBULK.H"
6 #include "HAL.H"
7 ////////////////////////////////////////
8 extern SYS_INFO_BLOCK xdata DeviceInfo;
9 extern FILE_INFO xdata ThisFile;
10 extern unsigned char xdata DBUF[BUFFER_LENGTH];
11 extern unsigned char xdata FATBUF[512];
12 ////////////////////////////////////////
13
14 unsigned long FirstSectorofCluster32(unsigned long clusterNum)
15 {
16 1 unsigned long temp;
17 1 temp=clusterNum-2;
18 1 temp=temp*DeviceInfo.BPB_SecPerClus;
19 1 temp=temp+DeviceInfo.FirstDataSector;
20 1 return temp;
21 1 }
22
23 unsigned long ThisFatSecNum32(unsigned long clusterNum)
24 {
25 1 unsigned long temp;
26 1 temp=clusterNum*4;
27 1 temp=temp/DeviceInfo.BPB_BytesPerSec;
28 1 temp=temp+DeviceInfo.FatStartSector;
29 1 return temp;
30 1 }
31
32 unsigned long ThisFatEntOffset32(unsigned long clusterNum)
33 {
34 1 unsigned long temp1,temp2;
35 1 temp1=4*clusterNum;
36 1 temp2=temp1/DeviceInfo.BPB_BytesPerSec;
37 1 temp1=temp1-temp2*DeviceInfo.BPB_BytesPerSec;
38 1 return temp1;
39 1 }
40
41 unsigned long GetNextClusterNum32(unsigned long clusterNum)
42 {
43 1 unsigned long FatSecNum,FatEntOffset;
44 1
45 1 FatSecNum=ThisFatSecNum32(clusterNum);
46 1 FatEntOffset=ThisFatEntOffset32(clusterNum);
47 1 if(ThisFile.FatSectorPointer!=FatSecNum)
48 1 {
49 2
50 2 if(!RBC_Read(FatSecNum,1,FATBUF))
51 2 return 0xFFFFFFFF;
52 2 ThisFile.FatSectorPointer=FatSecNum;
53 2 }
54 1
55 1 ///////////////////////////////////////////////////
C51 COMPILER V7.06 FAT32 08/10/2005 23:36:36 PAGE 2
56 1 clusterNum=LSwapINT32(FATBUF[FatEntOffset],FATBUF[FatEntOffset+1],FATBUF[FatEntOffset+2],FATBUF[FatEntOff
-set+3]);
57 1 return clusterNum;
58 1 }
59
60 unsigned char GoToPointer32(unsigned long pointer)
61 {
62 1
63 1 unsigned int clusterSize;
64 1
65 1 clusterSize=DeviceInfo.BPB_SecPerClus*DeviceInfo.BPB_BytesPerSec;
66 1 ThisFile.ClusterPointer=ThisFile.StartCluster;
67 1 while(pointer>clusterSize)
68 1 {
69 2 pointer-=clusterSize;
70 2 ThisFile.ClusterPointer=GetNextClusterNum32(ThisFile.ClusterPointer);
71 2 if(ThisFile.ClusterPointer==0xffffffff)
72 2 {
73 3 return FALSE;
74 3 }
75 2 }
76 1 ThisFile.SectorofCluster=pointer/DeviceInfo.BPB_BytesPerSec;
77 1 ThisFile.SectorPointer=FirstSectorofCluster32(ThisFile.ClusterPointer)+ThisFile.SectorofCluster;
78 1 ThisFile.OffsetofSector=pointer-ThisFile.SectorofCluster*DeviceInfo.BPB_BytesPerSec;
79 1 ThisFile.FatSectorPointer=0;
80 1 return TRUE;
81 1
82 1 }
83
84 unsigned char DeleteClusterLink32(unsigned long clusterNum)
85 {
86 1 unsigned long FatSecNum,FatEntOffset;
87 1 unsigned char i;
88 1 while((clusterNum>1)&&(clusterNum<DeviceInfo.TotCluster))
89 1 {
90 2 FatSecNum=ThisFatSecNum32(clusterNum);
91 2 FatEntOffset=ThisFatEntOffset32(clusterNum);
92 2 if(RBC_Read(FatSecNum,1,DBUF))
93 2 clusterNum=LSwapINT32(DBUF[FatEntOffset],DBUF[FatEntOffset+1],DBUF[FatEntOffset+2],DBUF[FatEntOffset+3])
-;
94 2 else
95 2 return FALSE;
96 2 DBUF[FatEntOffset]=0x00;DBUF[FatEntOffset+1]=0x00;DBUF[FatEntOffset+2]=0x00;DBUF[FatEntOffset+3]=0x00;
97 2 for(i=0;i<DeviceInfo.BPB_NumFATs;i++)
98 2 {
99 3 DelayMs(5);
100 3 if(!RBC_Write(FatSecNum+i*DeviceInfo.BPB_FATSz32,1,DBUF))
101 3 return FALSE;
102 3 }
103 2 }
104 1 return TRUE;
105 1 }
106
107 unsigned long GetFreeCusterNum32(void)
108 {
109 1 unsigned long xdata clusterNum,i;
110 1 unsigned long xdata sectorNum;
111 1 unsigned char xdata j;
112 1 clusterNum=0;
113 1 sectorNum=DeviceInfo.FatStartSector;
114 1 while(sectorNum<DeviceInfo.BPB_FATSz32+DeviceInfo.FatStartSector)
115 1 {
C51 COMPILER V7.06 FAT32 08/10/2005 23:36:36 PAGE 3
116 2 if(!RBC_Read(sectorNum,1,DBUF))
117 2 return 0x0;
118 2 for(i=0;i<DeviceInfo.BPB_BytesPerSec;i=i+4)
119 2 {
120 3 if((DBUF[i]==0)&&(DBUF[i+1]==0)&&(DBUF[i+2]==0)&&(DBUF[i+3]==0))
121 3 {
122 4 DBUF[i]=0xff;DBUF[i+1]=0xff;DBUF[i+2]=0xff;DBUF[i+3]=0xff;
123 4 for(j=0;j<DeviceInfo.BPB_NumFATs;j++)
124 4 {
125 5 DelayMs(5);
126 5 if(!RBC_Write(sectorNum+j*DeviceInfo.BPB_FATSz32,1,DBUF))
127 5 return FALSE;
128 5 }
129 4 return clusterNum;
130 4 }
131 3 clusterNum++;
132 3 }
133 2 sectorNum=4*clusterNum/DeviceInfo.BPB_BytesPerSec+DeviceInfo.FatStartSector;
134 2 DelayMs(10);
135 2 }
136 1 return 0x0;
137 1 }
138
139 unsigned long CreateClusterLink32(unsigned long currentCluster)
140 {
141 1 unsigned long xdata newCluster;
142 1 unsigned long xdata FatSecNum,FatEntOffset;
143 1 unsigned char xdata i;
144 1
145 1 newCluster=GetFreeCusterNum32();
146 1
147 1 FatSecNum=ThisFatSecNum32(currentCluster);
148 1 FatEntOffset=ThisFatEntOffset32(currentCluster);
149 1 if(RBC_Read(FatSecNum,1,DBUF))
150 1 {
151 2 DBUF[FatEntOffset]=newCluster;
152 2 DBUF[FatEntOffset+1]=newCluster>>8;
153 2 DBUF[FatEntOffset+2]=newCluster>>16;
154 2 DBUF[FatEntOffset+3]=newCluster>>24;
155 2 for(i=0;i<DeviceInfo.BPB_NumFATs;i++)
156 2 {
157 3 DelayMs(5);
158 3 if(!RBC_Write(FatSecNum+i*DeviceInfo.BPB_FATSz32,1,DBUF))
159 3 return FALSE;
160 3 }
161 2 }
162 1 else
163 1 return 0x00;
164 1
165 1 return newCluster;
166 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 2089 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- 26
PDATA SIZE = ---- ----
DATA SIZE = ---- 63
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILER V7.06 FAT32 08/10/2005 23:36:36 PAGE 4
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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