📄 u_func_a.lst
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757 3 }
758 2 else temp_ofst-=32;
759 2 }
760 1 Wr_Sector_b(root_b+SectOfst);
761 1 }
762
763 /*******************************************************************************
764 ------写B盘FAT---------------------------------------------------
765 ********************************************************************************
766 说明: 入口参数：文件号
767 出口参数：首簇号
768 *******************************************************************************/
769 unsigned long WrFAT_b(unsigned char file_num)
770 {
771 1 unsigned char xdata *pt;
772 1 unsigned char SectFirst,SectChange;
773 1 UINT32 data ClustNum;
774 1 UINT32 temp_clust;
775 1 struct{
776 1 unsigned long SectOfst;
777 1 unsigned int ByteOfst;
778 1 }c1,c2;
779 1 unsigned long data i;
780 1 unsigned char data j;
781 1 unsigned long fat_b,ChangeClust=0,SumClust,FirstClust=0;
782 1 pt=Data_Buf;
*** WARNING C182 IN LINE 782 OF U_FUNC_A.C: pointer to different objects
783 1
784 1 SumClust=Fat[file_num].Big.value/(512*sect_clust_b)+1;
785 1 fat_b=hidd_sect_b+resv_sect_b;
786 1 for(i=0;i<sect_fat_b;i++)
C51 COMPILER V8.02 U_FUNC_A 07/21/2008 09:40:01 PAGE 14
787 1 {
788 2 Rd_Sector_b(fat_b+i);
789 2 SectFirst=1;
790 2 SectChange=0;
791 2 for(j=0;j<128;j++)
792 2 {
793 3 ClustNum.num[3]=*(pt+j*4);
794 3 ClustNum.num[2]=*(pt+j*4+1);
795 3 ClustNum.num[1]=*(pt+j*4+2);
796 3 ClustNum.num[0]=*(pt+j*4+3);
797 3 if(ClustNum.value==0) //是否为空
798 3 {
799 4 SectChange=1;
800 4 if(FirstClust==0)
801 4 {
802 5 FirstClust=j+128*i; //首簇号
803 5 c1.SectOfst=i;
804 5 c1.ByteOfst=j*4;
805 5 c2.SectOfst=i;
806 5 c2.ByteOfst=j*4;
807 5 SectFirst=0;
808 5 }
809 4 else
810 4 {
811 5 c2.SectOfst=i;
812 5 c2.ByteOfst=j*4;
813 5 temp_clust.value=j+128*i; //c2指向的簇号
814 5 if(SectFirst==1) //若为此扇区的第一空簇
815 5 {
816 6 Rd_Sector_b(fat_b+c1.SectOfst);
817 6 *(pt+c1.ByteOfst)=temp_clust.num[3];
818 6 *(pt+c1.ByteOfst+1)=temp_clust.num[2];
819 6 *(pt+c1.ByteOfst+2)=temp_clust.num[1];
820 6 *(pt+c1.ByteOfst+3)=temp_clust.num[0];
821 6 Wr_Sector_b(fat_b+c1.SectOfst);
822 6 Wr_Sector_b(fat_b+sect_fat_b+c1.SectOfst); //写FAT2
823 6 Rd_Sector_b(fat_b+c2.SectOfst);
824 6 c1=c2;
825 6 SectFirst=0;
826 6 }
827 5 else
828 5 {
829 6 *(pt+c1.ByteOfst)=temp_clust.num[3];
830 6 *(pt+c1.ByteOfst+1)=temp_clust.num[2];
831 6 *(pt+c1.ByteOfst+2)=temp_clust.num[1];
832 6 *(pt+c1.ByteOfst+3)=temp_clust.num[0];
833 6 c1=c2;
834 6 }
835 5 }
836 4 ChangeClust++;
837 4 if(ChangeClust>=SumClust)
838 4 {
839 5 *(pt+c2.ByteOfst)=0xff;
840 5 *(pt+c2.ByteOfst+1)=0xff;
841 5 *(pt+c2.ByteOfst+2)=0xff;
842 5 *(pt+c2.ByteOfst+3)=0x0f;
843 5 break;
844 5 }
845 4 }
846 3 }
847 2 if(SectChange==1)
848 2 {
C51 COMPILER V8.02 U_FUNC_A 07/21/2008 09:40:01 PAGE 15
849 3 Wr_Sector_b(fat_b+i);//此扇区修改完毕，写入，注：最后一空簇可能未写
850 3 Wr_Sector_b(fat_b+sect_fat_b+c1.SectOfst); //写FAT2
851 3 if(ChangeClust>=SumClust) return FirstClust;
852 3 }
853 2 }
854 1 }
855
856 /*******************************************************************************
857 ------读A盘文件的某一扇区---------------------------------------------------
858 ********************************************************************************
859 说明: 写入单片机中数据缓冲区
860 入口参数：文件号
861 出口参数：0x00:文件结束，0xff：文件还未读完
862 *******************************************************************************/
863 unsigned char ReadAA(unsigned char file_num)
864 {
865 1 static unsigned char data TempSectOfstAA;
866 1 unsigned char xdata *Fpt;
867 1 unsigned int data temp_ofst;
868 1 static unsigned long data BaseSectAA,SumSectorAA,SectorAA=0;
869 1 Fpt=FATBufA;
870 1 if(SectorAA==0)
871 1 {
872 2 ClusterA.NextClust.value=Fat[file_num].St_Clust.value;
873 2 SumSectorAA=Fat[file_num].Big.value/512+1;
874 2 }
875 1 if(SectorAA<=SumSectorAA)
876 1 {
877 2
878 2 if(SectorAA%sect_clust_a==0)
879 2 {
880 3
881 3 if(ClusterA.NextClust.value/128!=ClusterA.CurrtClust/128||SectorAA==0)
882 3 {
883 4 ClusterA.CurrtClust=ClusterA.NextClust.value;
884 4 Rd_FAT_a(ClusterA.NextClust.value/128+resv_sect_a+hidd_sect_a);
885 4 }
886 3 else
887 3 {
888 4 ClusterA.CurrtClust=ClusterA.NextClust.value;
889 4 }
890 3 temp_ofst=(ClusterA.CurrtClust%128)*4;
891 3 ClusterA.NextClust.num[3]=*(Fpt+temp_ofst);
892 3 ClusterA.NextClust.num[2]=*(Fpt+temp_ofst+1);
893 3 ClusterA.NextClust.num[1]=*(Fpt+temp_ofst+2);
894 3 ClusterA.NextClust.num[0]=*(Fpt+temp_ofst+3);
895 3 BaseSectAA=(ClusterA.CurrtClust-2)*sect_clust_a+root_a;
896 3 TempSectOfstAA=0;
897 3 }
898 2 Rd_Sector_a(BaseSectAA+TempSectOfstAA); //读一扇区
899 2 TempSectOfstAA++;
900 2 SectorAA++;
901 2 }
902 1 if(SectorAA>=SumSectorAA)
903 1 {
904 2 SectorAA=0;
905 2 return 0x00;
906 2 }
907 1 else return 0xff;
908 1 }
909
910
C51 COMPILER V8.02 U_FUNC_A 07/21/2008 09:40:01 PAGE 16
911 /*******************************************************************************
912 ------写B盘某一扇区---------------------------------------------------
913 ********************************************************************************
914 说明: 入口参数：首簇号，文件号
915 出口参数：0x00:文件写结束，0xff：文件还未写完
916 *******************************************************************************/
917 unsigned char WriteAB(unsigned long FirstClust,unsigned char file_num) //AB表示A为主盘，对B操作
918 {
919 1 static unsigned char data TempSectOfstAB;
920 1 unsigned char xdata *Fpt;
921 1 unsigned int data temp_ofst;
922 1 static unsigned long data SectorAB=0,SumSectorAB,BaseSectAB;
923 1 Fpt=FATBufB;
924 1 if(SectorAB==0)
925 1 {
926 2 ClusterB.NextClust.value=FirstClust;
927 2 SumSectorAB=Fat[file_num].Big.value/512+1;
928 2 }
929 1 if(SectorAB<=SumSectorAB)
930 1 {
931 2
932 2 if(SectorAB%sect_clust_b==0)
933 2 {
934 3
935 3 if(ClusterB.NextClust.value/128!=ClusterB.CurrtClust/128||SectorAB==0)
936 3 {
937 4 ClusterB.CurrtClust=ClusterB.NextClust.value;
938 4 Rd_FAT_b(ClusterB.NextClust.value/128+resv_sect_b+hidd_sect_b);
939 4 }
940 3 else
941 3 {
942 4 ClusterB.CurrtClust=ClusterB.NextClust.value;
943 4 }
944 3 temp_ofst=(ClusterB.CurrtClust%128)*4;
945 3 ClusterB.NextClust.num[3]=*(Fpt+temp_ofst);
946 3 ClusterB.NextClust.num[2]=*(Fpt+temp_ofst+1);
947 3 ClusterB.NextClust.num[1]=*(Fpt+temp_ofst+2);
948 3 ClusterB.NextClust.num[0]=*(Fpt+temp_ofst+3);
949 3 BaseSectAB=(ClusterB.CurrtClust-2)*sect_clust_b+root_b;
950 3 TempSectOfstAB=0;
951 3 }
952 2 Wr_Sector_b(BaseSectAB+TempSectOfstAB); //读一扇区
953 2 TempSectOfstAB++;
954 2 SectorAB++;
955 2 }
956 1 if(SectorAB>=SumSectorAB)
957 1 {
958 2 SectorAB=0;
959 2 return 0x00;
960 2 }
961 1 else return 0xff;
962 1 }
963
964 /*******************************************************************************
965 ------读AFAT表---------------------------------------------------
966 ********************************************************************************
967 说明: 入口参数：扇区号LBA
968 出口参数：0x14:读取成功，0x1f：读取失败
969 *******************************************************************************/
970 unsigned char Rd_FAT_a(unsigned long LBA)
971 {
972 1 unsigned char sta,i,j,Next_Num=0;
C51 COMPILER V8.02 U_FUNC_A 07/21/2008 09:40:01 PAGE 17
973 1 unsigned char xdata *pt;
974 1 sta=0x1f;
975 1 pt=FATBufA;
976 1 CH375HM_INDEX_WR_a( DISK_READ ); /* 从USB存储器读数据块 */
977 1 CH375HM_DATA_WR_a( (unsigned char)LBA ); /* LBA的最低8位 */
978 1 CH375HM_DATA_WR_a( (unsigned char)( LBA >> 8 ) );
979 1 CH375HM_DATA_WR_a( (unsigned char)( LBA >> 16 ) );
980 1 CH375HM_DATA_WR_a( (unsigned char)( LBA >> 24 ) ); /* LBA的最高8位 */
981 1 CH375HM_DATA_WR_a( 1 ); /* 扇区数 */
982 1 Delay();
983 1 for(i=0;i<9;i++)
984 1 {
985 2 sta=Wait_Int_a();
986 2 if(sta==0x1f||sta==0x14) return sta;
987 2 CH375HM_INDEX_WR_a(RD_USB_DATA);
988 2 Next_Num=CH375HM_DATA_RD_a();
989 2 for(j=0;j<Next_Num;j++)
990 2 {
991 3 *pt=CH375HM_DATA_RD_a();
992 3 pt++;
993 3 }
994 2 CH375HM_INDEX_WR_a(DISK_RD_GO);
995 2 }
996 1 return 0xff;
997 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 7915 ----
CONSTANT SIZE = 59 ----
XDATA SIZE = ---- 164
PDATA SIZE = ---- ----
DATA SIZE = 26 15
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 10 WARNING(S), 0 ERROR(S)
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