📄 main.lst
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945 2 ((unsigned char*)(&dir))[i]=' ';
946 2 }
947 1 dir.file_name[0]='.'; //current dir
948 1 dir.file_attribute=0x10;
949 1 dir.first_clust[0]=(sector)%256;
950 1 dir.first_clust[1]=(sector)/256;
951 1 for(i=0;i<512;i++)
952 1 {
953 2 data_buf[i]=0;
954 2 }
955 1 for(i=0;i<32;i++)
956 1 {
957 2 data_buf[i]=((unsigned char*)(&dir))[i];
958 2 }
959 1 temp_sec=(parent_dir_sector
960 1 -(1+bootinfo.fat_size*bootinfo.fat_num+bootinfo.root_dir_size*32/512))
961 1 /bootinfo.sec_per_clust+2;
962 1 dir.file_name[1]='.'; //parent dir
963 1 dir.first_clust[0]=temp_sec%256;
964 1 dir.first_clust[1]=temp_sec/256;
965 1 for(i=0;i<32;i++)
966 1 {
967 2 data_buf[32+i]=((unsigned char*)(&dir))[i];
968 2 }
969 1 if(WriteOneSec(data_buf,(sector-2)*bootinfo.sec_per_clust
970 1 +(1+bootinfo.fat_size*bootinfo.fat_num+bootinfo.root_dir_size*32/512))==0)
971 1 {
972 2 return -1;
973 2 }
974 1 return 1;
975 1 }
976
C51 COMPILER V7.07 MAIN 12/01/2005 22:22:50 PAGE 17
977 //char PutData(unsigned char* file_data,unsigned int data_len)
978 char CFWriteFile(unsigned char* file_data,unsigned int data_len)
979 {
980 1 xdata unsigned int i;
981 1 xdata int un_write_len=0;
982 1 // xdata unsigned int current_file_pt;
983 1 static xdata unsigned int next_clustor;
984 1 // xdata unsigned int sector;
985 1 #ifdef DEBUG
printf("\nstart clustor=%x\n",s_fileinfo.start_clustor);
printf("current sec=%d\n",(int)s_fileinfo.current_sector);
printf("in sec pos=%x\n",s_fileinfo.current_in_sector_pos);
printf("size=%x,%u,%l\n",s_fileinfo.size,s_fileinfo.size,s_fileinfo.size);
printf("buf pos=%d,%u,%d\n",(int)buf_pos,(long)buf_pos,buf_pos);
#endif
992 1 if(data_len<=512)
993 1 {
994 2 #ifdef DEBUG
printf("buf_pos=%d\n",(int)buf_pos);
#endif
997 2 un_write_len=data_len;
998 2 for(i=buf_pos;(i<512)&&(un_write_len>0);i++)
999 2 {
1000 3 write_buf[i]=file_data[i-buf_pos];
1001 3 un_write_len--;
1002 3 }
1003 2 s_fileinfo.size=s_fileinfo.size+i-buf_pos;
1004 2 buf_pos=i;
1005 2 #ifdef DEBUG
printf("buf_pos=%d\n",(int)buf_pos);
#endif
1008 2 if(buf_pos>=512)
1009 2 {
1010 3 #ifdef DEBUG
printf("start w\n");
#endif
1013 3 if(WriteOneSec(write_buf,(s_fileinfo.start_clustor-2)
1014 3 *bootinfo.sec_per_clust
1015 3 +(1+bootinfo.fat_size*bootinfo.fat_num+bootinfo.root_dir_size*32/512)
1016 3 +s_fileinfo.current_sector)==0)
1017 3 {
1018 4 #ifdef DEBUG
printf("www\n");
#endif
1021 4 return -1;
1022 4 }
1023 3 // s_fileinfo.size=s_fileinfo.size+buf_pos;
1024 3 buf_pos=0;
1025 3 s_fileinfo.current_sector++;
1026 3 #ifdef DEBUG
printf("_in_buf_current_sector=%d\n",(int)s_fileinfo.current_sector);
#endif
1029 3 #ifdef DEBUG
printf("_in_buf_pos=%d\n",(int)buf_pos);
#endif
1032 3 }
1033 2 if(un_write_len>0)
1034 2 {
1035 3 #ifdef DEBUG
printf("a\n");
#endif
1038 3 for(i=0;i<un_write_len;i++)
C51 COMPILER V7.07 MAIN 12/01/2005 22:22:50 PAGE 18
1039 3 {
1040 4 write_buf[i]=file_data[i+(data_len-un_write_len)];
1041 4 buf_pos++;
1042 4 }
1043 3
1044 3 #ifdef DEBUG
printf("un buf_pos=%d\n",(int)buf_pos);
#endif
1047 3 s_fileinfo.size=s_fileinfo.size+i;
1048 3 }
1049 2 if(s_fileinfo.current_sector>=bootinfo.sec_per_clust) //means one clustor written
1050 2 {
1051 3 #ifdef DEBUG
printf("b\n");
#endif
1054 3 s_fileinfo.current_sector=0;
1055 3 // if(SerchFreeFAT(&next_clustor,1,s_fileinfo.in_fat_sec)==0) //search Fat table from last sector
1056 3 if(SerchFreeFAT(&next_clustor,1,1)==0) //search Fat table from last sector
1057 3 {
1058 4 putchar('n');
1059 4 #ifdef DEBUG
printf("no free fat\n");
#endif
1062 4 return -1;
1063 4 }
1064 3 #ifdef DEBUG
printf("current clustor=%x\n",s_fileinfo.start_clustor);
printf("next clustor=%x\n",next_clustor);
#endif
1068 3 if(ReadOneSec((s_fileinfo.start_clustor*2)/512+1)==0)
1069 3 {
1070 4 return -1;
1071 4 }
1072 3 data_buf[(s_fileinfo.start_clustor*2)%512]=next_clustor%256;
1073 3 data_buf[(s_fileinfo.start_clustor*2)%512+1]=next_clustor/256;
1074 3 if(WriteOneSec(data_buf,(s_fileinfo.start_clustor*2)/512+1)==0)
1075 3 {
1076 4 return -1; //write fdt error
1077 4 }
1078 3
1079 3 s_fileinfo.start_clustor=next_clustor;
1080 3 s_fileinfo.in_fat_sec=(next_clustor*2)/512+1;
1081 3
1082 3 if(ReadOneSec((s_fileinfo.start_clustor*2)/512+1)==0) //read one sector in Fat table area
1083 3 {
1084 4 return -1;
1085 4 }
1086 3 for(i=(s_fileinfo.start_clustor*2)%512;i<(s_fileinfo.start_clustor*2)%512+2;i++) //wrire fat table
1087 3 {
1088 4 data_buf[i]=0xff;
1089 4 }
1090 3 if(WriteOneSec(data_buf,(s_fileinfo.start_clustor*2)/512+1)==0)
1091 3 {
1092 4 return -1; //write fdt error
1093 4 }
1094 3 // for(buf_pos=0;buf_pos<unuse_len;buf_pos++)
1095 3 // {
1096 3 // write_buf[buf_pos]=file_data[data_len-unuse_len+buf_pos];
1097 3 // }
1098 3 // s_fileinfo.size=s_fileinfo.size+buf_pos;
1099 3 }
1100 2 return 1;
C51 COMPILER V7.07 MAIN 12/01/2005 22:22:50 PAGE 19
1101 2 }
1102 1 else
1103 1 {
1104 2 return -1; //data large then 512 bytes
1105 2 }
1106 1 //the data is more then one sector
1107 1 /*
1108 1 if(data_len>512)
1109 1 {
1110 1 printf("c\n");
1111 1 if(s_fileinfo.current_in_sector_pos!=0) //the target sector is used
1112 1 {
1113 1 if(ReadOneSec(((s_fileinfo.start_clustor+s_fileinfo.current_sector)/2-2)*bootinfo.sec_per_clust
1114 1 +(1+bootinfo.fat_size*bootinfo.fat_num+bootinfo.root_dir_size*32/512))==0)
1115 1 {
1116 1 return -1;
1117 1 }
1118 1 for(i=0;i<512-s_fileinfo.current_in_sector_pos;i++)
1119 1 {
1120 1 data_buf[s_fileinfo.current_in_sector_pos+i]=file_data[i];
1121 1 }
1122 1 if(WriteOneSec(data_buf,((s_fileinfo.start_clustor+s_fileinfo.current_sector)/2-2)*bootinfo.sec_per_clu
-st
1123 1 +(1+bootinfo.fat_size*bootinfo.fat_num+bootinfo.root_dir_size*32/512))==0)
1124 1 {
1125 1 return -1;
1126 1 }
1127 1 s_fileinfo.current_sector++;
1128 1 current_file_pt=512-s_fileinfo.current_in_sector_pos;
1129 1 for(i=0;i<(data_len-current_file_pt)/512;i++)
1130 1 {
1131 1 if(WriteOneSec(file_data+current_file_pt+i*512,
1132 1 ((s_fileinfo.start_clustor+s_fileinfo.current_sector+i+1)/2-2)
1133 1 *bootinfo.sec_per_clust
1134 1 +(1+bootinfo.fat_size*bootinfo.fat_num+bootinfo.root_dir_size*32/512))==0)
1135 1 {
1136 1 return -1;
1137 1 }
1138 1 s_fileinfo.current_sector++;
1139 1 // if(s_fileinfo.current_sector%4==0)
1140 1 // {
1141 1 // s_fileinfo.current_in_sector_pos=s
1142 1 }
1143 1
1144 1 }
1145 1 if(data_len-s_fileinfo.current_in_sector_pos>512*bootinfo.sec_per_clust)
1146 1 {
1147 1 if(WriteOneSec(file_data,(s_fileinfo.current_sector/2-2)*bootinfo.sec_per_clust
1148 1 +(1+bootinfo.fat_size*bootinfo.fat_num+bootinfo.root_dir_size*32/512))==0)
1149 1 {
1150 1 return -1; //Write file error
1151 1 }
1152 1 if(ReadOneSec(s_fileinfo.current_sector/512+1)==0) //read one sector in Fat table area
1153 1 {
1154 1 return 0xffff;
1155 1 }
1156 1 for(i=1;i<bootinfo.fat_size;i++)
1157 1 {
1158 1 SerchFreeFAT(&next_clustor,1,i);
1159 1 }
1160 1 for(i=s_fileinfo.current_sector%512;i<s_fileinfo.current_sector%512+2;i++) //wrire fat table
1161 1 {
C51 COMPILER V7.07 MAIN 12/01/2005 22:22:50 PAGE 20
1162 1 data_buf[i]=0xff;
1163 1 }
1164 1 if(WriteOneSec(data_buf,s_fileinfo.current_in_sector_pos/512+1)==0)
1165 1 {
1166 1 return 0xffff; //write fdt error
1167 1 }
1168 1 for(i=0;i<(data_len-512)/512;i++)
1169 1 {
1170 1 // data_buf[i]=
1171 1 }
1172 1 }
1173 1 // s_fileinfo.
1174 1 // s_fileinfo.current_sector
1175 1 }
1176 1 else //the data to be written is less then one clustor
1177 1 {
1178 1 current_file_pt=0;
1179 1 if(s_fileinfo.current_in_sector_pos>0) //the target sector is used
1180 1 {
1181 1 if(ReadOneSec(((s_fileinfo.start_clustor+s_fileinfo.current_sector)/2-2)*bootinfo.sec_per_clust
1182 1 +(1+bootinfo.fat_size*bootinfo.fat_num+bootinfo.root_dir_size*32/512))==0)
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