51单片机汇编程序集2Word文档格式.docx
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- 上传时间:2023-01-22
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- 页数:19
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51单片机汇编程序集2Word文档格式.docx
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DECR7
SJF1:
MOVXA,@DPTRINCDPTR
CLRC
RLCA
MOVR6,A
CLRA
XCHA,R7
JNBACC.0,SJF2
XCHA,R6
SJF2:
XCHA,R7
ADDA,R4
MOVA,R6
MOVR3,A
DJNZR7,SJF1
SJF3:
MOVXA,@DPTRADDA,R4
ADDCA,R3
MOVR7,#COUNTLCALLNMUL21
MOVA,N
MOVB,#03H
MULAB
MOVR7,A
LCALLNDIV31
RET
NMUL21:
MOVA,R4MOVB,R7
MOVA,B
XCHA,R3
MOVB,R7
ADDCA,B
MOVR2,A
CLROV
NDIV31:
MOVB,#10HNDV311:
CLRC
MOVA,R4
MOVA,R3
MOVA,R2
MOVF0,C
SUBBA,R7
JBF0,NDV312
JCNDV313
NDV312:
MOVR2,AINCR4
NDV313:
DJNZB,NDV311RET
内部RAM数据排序程序(升序;
R0(起始地址,N(数据个数;
ACC,B,R5,R6,R7
R0
ISELSORT:
MOVR7,NDECR7
ISST1:
MOVA,R7
MOVA,R0
MOVR1,A
MOVB,@R1
ISST2:
INCR1
MOVA,@R1
SUBBA,B
JCISST3
MOVA,R1
ISST3:
DJNZR6,ISST2
XCHA,@R1
MOVB,R2
MOVR1,B
MOV@R1,A
DJNZR7,ISST1
ADDPH,ADDPL(起始地址,N(数据个数;
ACC,B,R0,R1,R5,R7
ADDPH-ADDPL
ESELSORT:
ESST1:
MOVDPL,ADDPL
MOVR1,DPL
MOVDPH,ADDPH
MOVR0,DPH
MOVB,A
ESST2:
INCDPTR
JCESST3
MOVR0,DPL
MOVR1,DPH
ESST3:
DJNZR6,ESST2
XCHA,B
MOVX@DPTR,A
MOVDPL,R0
MOVDPH,R1
DJNZR7,ESST1
ADDPH,ADDPL(起始地址,N(数据个数
ACC,B,R0,R1,R2,R3,R4,R5,R6,R7,NCNT;
5字节
ADDPH,ADDPL
FSORT:
MOVA,N
MOVNCNT,A
DECNCNT
FST1:
MOVB,NCNTMOVDPL,ADDPLMOVR1,DPL
MOVDPH,ADDPHMOVR0,DPHMOVXA,@DPTRMOVR2,A
MOVXA,@DPTRMOVR3,A
MOVXA,@DPTRMOVR4,A
FST2:
INCDPTRMOVXA,@DPTRMOVR5,A
MOVXA,@DPTRMOVR6,A
MOVXA,@DPTRMOVR7,A
PUSHB
LCALLFCMP
POPB
JNCFST4
MOVA,DPL
SUBBA,#02H
JNCFST3
DECR0
FST3:
MOVA,R5MOVR2,A
MOVA,R7
FST4:
DJNZB,FST2MOVA,DPL
MOVDPL,A
JNCFST5
DECDPH
FST5:
MOVA,R2MOVX@DPTR,AINCDPTR
MOVP2,A
MOVA,R5
MOVX@R1,A
INCR1
DJNZNCNT,FST1
BCD小数转换为二进制小数(2位;
R0(低位首址,R7
ACC,B,R5
PDTB:
CLRA
PDB1:
MOVA,R3MOVB,#9AHMULAB
MOVR5,B
XCHA,R4
MOVB,#19HMULAB
MOVR5,A
MOVA,@R0MOVB,#9AHMULAB
ADDA,R5
MOVA,@R0
MOVB,#19H
ADDA,R3
DJNZR7,PDB1
BCD小数转换为二进制小数(N位;
R1(低位首址,M,N
ACC,B,R2,R3,R7
PDTBMN:
MOVA,R0
MOVB,N
PDBMN1:
MOV@R0,A
INCR0
DJNZB,PDBMN1
SWAPA
RRA
PDBMN2:
MOVA,R2MOVR0,A
MOVB,M
PDBMN3:
MOVA,@R1ADDCA,@R1
DAA
JNBACC.4,PDBMN4SETBC
CLRACC.4
PDBMN4:
MOV@R1,AINCR1
DJNZB,PDBMN3
PDBMN5:
MOVA,@R0RLCA
MOV@R0,A
DJNZB,PDBMN5
DJNZR7,PDBMN2
MOVR0,A
BCD整数转换为二进制整数(1位;
R0(高位地址,R7
ACC,B
R4
IDTB1:
IDB11:
MOVA,R4
MOVB,#0AH
ADDA,@R0
DJNZR7,IDB11
BCD整数转换为二进制整数(2位;
IDTB2:
IDB21:
DJNZR7,IDB21
BCD整数转换为二进制整数(3位;
R2,R3,R4IDTB3:
CLRAMOVR2,A
IDB31:
MOVA,R4MOVB,#0AHMULAB
MOVB,#0AHMULAB
XCHA,R2
ADDA,R2
ADDCA,R2
DJNZR7,IDB31
BCD整数转换为二进制整数(N位;
R1(高位地址,M,N
ACC,B,R2,R7,NCNT,F0;
IDTBMN:
IDBMN1:
DJNZB,IDBMN1
MOVA,M
IDBMN2:
MOVR7,NCLRA
CLRF0
IDBMN3:
XCHA,@R0MOVB,#0AH
MOVC,F0
ADDCA,@R0
DJNZR7,IDBMN3MOVA,R2
DJNZNCNT,IDBMN2RET
二进制小数(2位转换为十进制小数(分离BCD码;
R3,R4,R7
3字节
PBTD:
PUSHA
PBD1:
DJNZR7,PBD1
POPA
二进制小数(M位转换为十进制小数(分离BCD码;
R1,M,N
ACC,B,R2,R3,R7,NCNT
PBTDMN:
PBDMN1:
MOVR7,M
PBDMN2:
XCHA,@R1
ADDCA,@R1
DJNZR7,PBDMN2
ADDCA,#00H
DJNZNCNT,PBDMN1
二进制整数(2位转换为十进制整数(分离BCD码;
ACC,R2,NDIV31
R0,NCNT
IBTD21:
MOVNCNT,#00H
MOVR2,#00H
IBD211:
MOVR7,#0AH
INCNCNT
ORLA,R4
JNZIBD211
SUBBA,NCNT
二进制整数(2位转换为十进制整数(组合BCD码;
ACC,B,R7
IBTD22:
MOVR7,#03H
IBD221:
DJNZR7,IBD221
MOVR7,#10H
IBD222:
PUSHA
IBD223:
MOVA,@R0
DJNZB,IBD223
DJNZR7,IBD222
二进制整数(3位转换为十进制整数(分离BCD码;
R2,R3,R4
IBTD31:
IBD311:
ORLA,R3
JNZIBD311
二进制整数(3位转换为十进制整数(组合BCD码;
IBTD32:
MOVR7,#04H
IBD321:
MOV@R0,AINCR0
DJNZR7,IBD321POPA
MOVR7,#18H
IBD322:
PUSHACLRC
MOVB,#04H
IBD323:
MOVA,@R0ADDCA,@R0
INCR0DJNZB,IBD323POPAMOVR0,ADJNZR7,IBD322RET;
二进制整数(M位转换为十进制整数(组合BCD码;
R1,M,N;
ACC,B,R2,R3,R7;
2字节;
R0IBTDMN:
MOVA,R0MOVR2,AMOVA,R1MOVR3,AMOVB,NCLRAIBDMN1:
MOV@R0,AINCR0DJNZB,IBDMN1MOVA,MSWAPARRACLRC
MOVR7,AIBDMN2:
MOVA,R2MOVR0,AMOVA,R3MOVR1,AMOVB,MIBDMN3:
MOVA,@R1RLCAMOV@R1,AINCR1DJNZB,IBDMN3MOVB,NIBDMN4:
MOVA,@R0ADDCA,@R0DAAJNBACC.4,IBDMN5SETBCCLRACC.4IBDMN5:
MOV@R0,AINCR0DJNZB,IBDMN4DJNZR7,IBDMN2MOVA,R2MOVR0,ARET
三字节无符号除法程序(R2R3R4/R7=(R2R3R4余数R7;
R2,R3,R4,R7;
ACC,B,F0;
3字节;
(R2,R3,R4,R7,OVNDIV31:
MOVA,R2MOVB,R7DIVABPUSHAMOVR2,BMOVB,#10HNDV311:
CLRCMOVA,R4RLCAMOVR4,AMOVA,R3RLCAMOVR3,AMOVA,R2RLCAMOVR2,AMOVF0,CCLRCSUBBA,R7JBF0,NDV312
JCNDV313NDV312:
MOVR2,AINCR4NDV313:
DJNZB,NDV311POPACLROVJZNDV314SETBOVNDV314:
XCHA,R2MOVR7,ARET
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