startup.lst

采用811芯片实现单片机读写U盘的源代码

                     125     ;               MOVX    @DPTR,A
                     126     ;               MOV     DPTR,#0FE1AH
                     127     ;               MOVX    @DPTR,A
                     128                     
                     129     ;               MOV     DPTR,#0FEE0H    ;PRT口
                     130     ;               MOV     A,#080H
                     131     ;               MOVX    @DPTR,A         ;写页寄存器
                     132     ;               MOV     A,#0FFH         ;不出针
                     133     ;               MOV     DPTR,#00H
                     134     ;               MOVX    @DPTR,A
                     135     ;               MOV             A,#0CCH ;设置两个马达停止电流
                     136     ;               MOV     DPTR,#02000H
                     137     ;               MOVX    @DPTR,A
                     138     ;               MOV     A,#00H          ;恢复页寄存器
                     139     ;               MOV     DPTR,#0FEE0H
                     140     ;               MOVX    @DPTR,A
                     141     
0003 758921          142                     MOV     TMOD,#21H       ;定时器初始化 定时器1工作方式为2
0006 758DFD          143                     MOV     TH1,#0FDH       ;定时器1波特率为9600
0009 758BFD          144                     MOV     TL1,#0FDH
000C D28E            145                     SETB    TR1             ;定时器1接通工作
000E 758CEE          146                     MOV     TH0,#0EEH       ;定时器0每5ms发一中断
0011 758A01          147                     MOV     TL0,#01H
0014 759850          148                     MOV     SCON,#50H       ;串口初始化 工作方式1,允许接收
0017 758700          149                     MOV     PCON,#00H
001A 75B800          150                     MOV     IP,#0H          ;串口中断优先
001D 75A800          151                     MOV     IE,#00H         ;允许中断
                     152     
                     153     
                     154     IF IDATALEN <> 0
                                             MOV     R0,#IDATALEN - 1
                                             CLR     A
                             IDATALOOP:      MOV     @R0,A
                                             DJNZ    R0,IDATALOOP
                             ENDIF
                     160     
                     161     IF XDATALEN <> 0
                                             MOV     DPTR,#XDATASTART
                                             MOV     R7,#LOW (XDATALEN)
                               IF (LOW (XDATALEN)) <> 0
                                             MOV     R6,#(HIGH XDATALEN) +1
                               ELSE
                                             MOV     R6,#HIGH (XDATALEN)
                               ENDIF
                                             CLR     A
                             XDATALOOP:      MOVX    @DPTR,A
                                             INC     DPTR
                                             DJNZ    R7,XDATALOOP
                                             DJNZ    R6,XDATALOOP
                             ENDIF
                     175     
                     176     IF PDATALEN <> 0
                                             MOV     R0,#PDATASTART
                                             MOV     R7,LOW (PDATALEN)
                                             CLR     A
                             PDATALOOP:      MOVX    @R0,A
                                             INC     R0
                                             DJNZ    R7,PDATALOOP
                             ENDIF
                     184     
                     185     IF IBPSTACK <> 0
                             EXTRN DATA (?C_IBP)
                             
                                             MOV     ?C_IBP,#LOW IBPSTACKTOP
                             ENDIF
                     190     
A51 MACRO ASSEMBLER  STARTUP                                                              09/22/2005 17:15:32 PAGE     4

                     191     IF XBPSTACK <> 0
                             EXTRN DATA (?C_XBP)
                             
                                             MOV     ?C_XBP,#HIGH XBPSTACKTOP
                                             MOV     ?C_XBP+1,#LOW XBPSTACKTOP
                             ENDIF
                     197     
                     198     IF PBPSTACK <> 0
                             EXTRN DATA (?C_PBP)
                                             MOV     ?C_PBP,#LOW PBPSTACKTOP
                             ENDIF
                     202     
                     203     IF PPAGEENABLE <> 0
                                             MOV     P2,#PPAGE
                             ENDIF
                     206     
0020 7581BF          207                     MOV     SP,#?STACK-1            ;设堆栈
                     208     ;               MOV     SP,#0C0H                ;设堆栈
                     209     
0023 020000   F      210                     LJMP    ?C_START
                     211     
                     212                     END
A51 MACRO ASSEMBLER  STARTUP                                                              09/22/2005 17:15:32 PAGE     5

SYMBOL TABLE LISTING
------ ----- -------


N A M E             T Y P E  V A L U E   ATTRIBUTES

?C_C51STARTUP. . .  C SEG    0026H       REL=UNIT
?C_START . . . . .  C ADDR   -----       EXT
?C_STARTUP . . . .  C ADDR   0000H   A   
?STACK . . . . . .  I ADDR   00C0H   A   
IBPSTACK . . . . .  N NUMB   0000H   A   
IBPSTACKTOP. . . .  N NUMB   0100H   A   
IDATALEN . . . . .  N NUMB   0000H   A   
IE . . . . . . . .  D ADDR   00A8H   A   
IP . . . . . . . .  D ADDR   00B8H   A   
P4 . . . . . . . .  N NUMB   00C0H   A   
PBPSTACK . . . . .  N NUMB   0000H   A   
PBPSTACKTOP. . . .  N NUMB   0000H   A   
PCON . . . . . . .  D ADDR   0087H   A   
PDATALEN . . . . .  N NUMB   0000H   A   
PDATASTART . . . .  N NUMB   0000H   A   
PPAGE. . . . . . .  N NUMB   0000H   A   
PPAGEENABLE. . . .  N NUMB   0000H   A   
SCON . . . . . . .  D ADDR   0098H   A   
SP . . . . . . . .  D ADDR   0081H   A   
STARTUP1 . . . . .  C ADDR   0000H   R   SEG=?C_C51STARTUP
TH0. . . . . . . .  D ADDR   008CH   A   
TH1. . . . . . . .  D ADDR   008DH   A   
TL0. . . . . . . .  D ADDR   008AH   A   
TL1. . . . . . . .  D ADDR   008BH   A   
TMOD . . . . . . .  D ADDR   0089H   A   
TR1. . . . . . . .  B ADDR   0088H.6 A   
WDKEY. . . . . . .  N NUMB   00AEH   A   
XBPSTACK . . . . .  N NUMB   0000H   A   
XBPSTACKTOP. . . .  N NUMB   0000H   A   
XDATALEN . . . . .  N NUMB   0000H   A   
XDATASTART . . . .  N NUMB   0000H   A   


REGISTER BANK(S) USED: 0 


ASSEMBLY COMPLETE.  0 WARNING(S), 0 ERROR(S)