mcrc.lst

关于温度传感器和电机测速的单片机程序

A51 MACRO ASSEMBLER  MCRC                                                                 11/14/2005 20:20:15 PAGE     1


MACRO ASSEMBLER A51 V7.00a
OBJECT MODULE PLACED IN mCRC.OBJ
ASSEMBLER INVOKED BY: D:\MCU\Keil51\C51\BIN\A51.EXE mCRC.SRC SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     NAME    MCRC
                       2     
                       3     ?PR?_m_CRC?MCRC      SEGMENT CODE INBLOCK 
                       4             PUBLIC  _m_CRC
                       5     
----                   6             RSEG  ?PR?_m_CRC?MCRC
0000                   7     _m_CRC:
                       8             USING   0
                       9     ;CRC0 'R7' ----
                      10     ;InByt'R5' ----
0000 ED               11             MOV     A,R5
0001 C0E0             12             PUSH    ACC             ;save bits to be shifted
0003 75F008           13             MOV     B,#8            ;set shift = 8 bits ;
0006                  14     CRC_LOOP: 
0006 6F               15             XRL     A,R7            ;calculate CRC
0007 13               16             RRC     A               ;move it to the carry
0008 EF               17             MOV     A,R7            ;get the last CRC value
0009 5002             18             JNC     ZERO            ;skip if data = 0
000B 6418             19             XRL     A,#18H          ;update the CRC value;
000D 13               20     ZERO:   RRC     A               ;position the new CRC
000E FF               21             MOV     R7,A            ;store the new CRC
000F D0E0             22             POP     ACC             ;get the remaining bits
0011 03               23             RR      A               ;position the next bit
0012 C0E0             24             PUSH    ACC             ;save the remaining bits
0014 D5F0EF           25             DJNZ    B,CRC_LOOP      ;repeat for eight bits
0017 D0E0             26             POP     ACC             ;clean up the stack
                      27     ;       MOV     AR7,R5
0019 22               28             RET
                      29             END
A51 MACRO ASSEMBLER  MCRC                                                                 11/14/2005 20:20:15 PAGE     2

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


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

?PR?_M_CRC?MCRC. .  C SEG    001AH       REL=INBLOCK
ACC. . . . . . . .  D ADDR   00E0H   A   
B. . . . . . . . .  D ADDR   00F0H   A   
CRC_LOOP . . . . .  C ADDR   0006H   R   SEG=?PR?_M_CRC?MCRC
MCRC . . . . . . .  N NUMB   -----       
ZERO . . . . . . .  C ADDR   000DH   R   SEG=?PR?_M_CRC?MCRC
_M_CRC . . . . . .  C ADDR   0000H   R   SEG=?PR?_M_CRC?MCRC


REGISTER BANK(S) USED: 0 


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