单片机作业参考(北航出版社)

第三章5、特殊寄存器：直接寻址方式。片外数据寄存器：寄存器间接寻址方式。8、MOVA，data：直接寻址MOVA，#data：立即数寻址MOVdata1，data2：直接寻址MOV74H，#78H：立即数寻址9、MOVA，@R0：（A）=80HMOV@R0,40H：（32H）=08HMOV40H,A：（40H）=80HMOVR0,#35H：（R0）=35H16、ANLA，#17H:10000011:00010111:00000011(A)=03HORL17H，A:00110100:00000011:00110111(17H)=37HXRLA，@R0:00000011:00110111:00110100(A)=34HCPLA:(A)=0CBH18、(1)MOV20H,R0MOV21H,R1MOV22H,R2MOV23H,R3MOV24H,R4MOV25H,R5MOV26H,R6MOV27H,R7(2)默认寄存器0组SETBRS0MOVR0，#00HMOVR1，#20HMOVR6，#08HLOOP:MOVA，@R0MOV@R1,AINCR0INCR1DJNZR6,LOOP.....20、MOVR3,#6FHMOVR2,#5DHMOVR1,#13HMOVR0,#0B4HCLRCMOVA,R2SUBBA,R0MOV30H,AMOVA,R3SUBBA,R1MOV31H,A21、(1)A≥10MOVR0,#0AHCLRCSUBBA,R0JZLABLEJNCLABLE.....LJMPNEXTLABLE:.....NEXT:...(2)A＞10MOVRO,#0AHCLRCSUBBA,R0JNZLOOPLJMPNEXTLOOP:JNCLABLE....LJMPNEXTLABLE:....NEXT:.....(2)A≤10MOVR0,#0AHCLRCSUBBA,R0JZLABLE;=10?JCLABLE;10?.....LJMPNEXTLABLE:.....NEXT:...22、（SP）=23H，（PC）=3412H25、MOVR6,#30HMOVR0,#20HMOVR2,#0AAHNEXT:MOVA,@R0SUBBA,R2JZLOOPINCRODJNZR6,NEXTMOV51H,#00HSJMPDOWNLOOP:MOV51H,#01H....DOWN:...26、MOVR6，#31HMOVR0，#20HMOVR2,#00H;NEXT:MOVA,@R0JNZLOOPINCR2;LOOP：INCR0DJNZR6，NEXTMOV51H，R230、MOVR0，#30HMOVR1，#40HMOVR7,#04H;CLRCLOOP:MOVA,@R0ADDCA，@R1;DAAMOV@R0,A;保存和INCROINCR1DJNZR7,LOOP....31、MOVDPTR，#2000HMOVR0，#30HMOVR7,#8;NEXT:MOVXA,@DPTRMOV@R0,AINCDPTR;INCR0DJNZR7，NEXTRET33、（1）将内存单元50H--59H赋值：0（2）7A0AMOVR2,#0AH7850MOVR0,#50HE4CLRA;-5E6LOOP:MOV@R0,A;-408INCR0;-3DAFCDJNZR2,LOOP;-1，-2DONE:;当前PC位置;+1FE-|地址差|=FE-2=FC(-4)反码：11111011(-4)补码：11111100：FC（3）MOVR2,#0AHMOVR0,#50HCLRALOOP:MOV@R0,AINCR0INCADJNZR2,LOOPDONE:35、1000H53H1001H54H1002H41H1003H52H1004H54H1005H12H34H1007H30H00H1009H70H36、（2）MOVRO,#40H;MOVA,@R0;(40H)送AINCRO;指向41H单元ADDA,@R0;（40H）+（41H），结果送AINCRO;指向42H单元MOV@R0,A;结果送42H单元CLRA;ADDCA,#0;INCRO;指向43H单元MOV@RO,A;和可能的进位送43H单元。（1）40H、41H两个单元的内容相加，结果放在43H、42H单元中第五章练习2、ORG0000HLJMPMAINORG0003HLJMPINTEX0ORG000BHLJMPINTET0ORG0013HLJMPINTEX1ORG0023HLJMPINTESORG0030HMAIN:.....SETBPT0MOVIE,#97H;10010111;SETBEX0;SETBEX1;SETBET0;SETBES;SETBEA......HERE:SJMPHEREORG1000HINYEX0:.....RETIORG1200HINTET0:......RETIORG1400HINTEX1:......RETIORG1600HINTES:......RETIEND14、设振荡频率12MHz，则机器周期：1us定时方式：T0,方式1。最大定时时间：216=65536us=65.536ms用此定时50ms,乘以20得1s,再乘60得1min计算T0初值：(216-X)*1us=50*1000usX=15536=3CB0HTL0=0B0HTH0=3CHORG0000HLJMPMAINORG000BHLJMPINTT0ORG0030HMAIN:MOVSP,#60HMOVTMOD,#01H;00000001;T0模式1，定时MOVR6,#20;秒MOVR7,#60;分MOVTL0,#0B0HMOVTH0,#3CHSETBEASETBET0SETBTR0;启动T0LOOPS:CJNER6,#00H,LOOPSSETBP1.0;秒脉冲输出CLRP1.0MOVR6,#20DECR7CJNER7,#00H,LOOPSSETBP1.1;分脉冲输出CLRP1.1MOVR7,#60SJMPLOOPSINTT0:MOVTLO,#0B0HMOVTH0,#3CHDECR6RETI第六章练习2、用P1.0输出用T0定时,方式2机器周期：1us100kHz的周期为：0.01ms=10us则定时5us计算T0初值：(28-X)*1us=5usX=251=FBHORG0000HLJMPMAINORG000BHCPLP1.0RETIORG0030HMAIN:MOVSP,#60HMOVTMOD,#02H;00000010;T0模式2，定时MOVTL0,#0FBHMOVTH0,#0FBHSETBEASETBET0SETBTR0;启动T0HERE:SJMPHERE8、T1方式1，计数时的初值：216-X=1000X=64536=FC18H定时时的初值：（216-Y)*2us=10*1000usY=60536=EC78HORG0000HLJMPMAINORG0030HMAIN:CLRTR1MOVTMOD,#50H;01010000;T1模式1，计数MOVTL1,#18HMOVTH1,#0FCHSETBTR1;启动T1LOOPC:JBCTF1,STIME;T1溢出表示1000个计数脉冲到SJMPLOOPCSTIME:CLRTR1;停止计数MOVTMOD,#10H;00010000T1模式1，定时MOVTL1,#78HMOVTH1,#0ECHSETBTR1LOOPT:JBCTF1,SCONT;T1溢出表示定时时间到SJMPLOOPTSCONT:LJMPMAIN13、T0方式1，定时、查寻方式高电平初值：（216-XH）*2us=50usXH=FFE7H低电平初值：（216-XL）*2us=300usXH=FF6AHORG0000HLJMPMAINORG0030HMAIN:MOVTMOD,#01H;00000001;T0模式1，定时SETBTR0;启动T0NEXT:MOVTL1,#0E7HMOVTH1,#0FFHLOOP:JBCTF0,SETH;高电平定时到SJMPLOOPSETH:CLRP1.0MOVTL1,#6AHMOVTH1,#0FFHLOOP1:JBCTF0,SETL;低电平定时到SJMPLOOP1SETL:SETBP1.0AJMPNEXT14、f=12MHzT1定时250uS如模式1：FF06H如模式2：06HORG0000HLJMPMAINORG0030HMAIN:MOVR2，#04HCLRP1.0CLRP1.1MOVTMOD,#20H;00100000，T1模式2，MOVTL1,#06HMOVTH1,#06HSETBTR1;启动T1LOOP:JBCTF1,L1;SJMPLOOPL1:CPLP1.1DJNZR2，LOOPCPLP1.0MOVR2，#04HLJMPLOOPRET18、T0方式2：200us定时的初值：（28-X）*1us=200usX=56=38H周期为2ms的方波定时1ms产生方法：200us*5=1000usORG0000HLJMPMAINORG0030HMAIN:MOVR6,#05HMOVTMOD,#01H;00000010;T0模式2，定时NEXT:MOVTL0,#38HMOVTH0,#38HSETBTR0;启动T0LOOP:JBCTF0,SETIME;定时200us到SJMPLOOPSETIME:DECR6CJNER6,#00H,LOOPCPLP1.0MOVR6,#05HSJMPLOOP19、f=12MHzT0定时50mS,50mS*20=1S,1s*60=1Min如模式1：3CB0HORG0000HLJMPMAINORG000BHLJMPT0INTORG0030HMAIN:MOVR0，#00HMOVR1，#00HMOVTMOD,#01HMOVTL0,#0B0HMOVTH0,#3CHSETBEASETBET0SETBTR0;启动T1CLRCLOOP:LJMPLOOP;中断子程ORG0200HTOINT:MOVTMOD,#01HMOVTL0,#0B0HINCR0MOVA,#20SUBBA，R0JNZL1CLRP1.0SETBP1.0CLRP1.0MOVR0,#0INCR1MOVA,#60SUBBA，R1JNZL1CLRP1.1SETBP1.1CLRP1.1MOVR1,#0L1：RETI第七章7、SCON:01010000波特率：T1模式2，初值：E8HORG0000HLJMPMIANORG0030HMAIN:MOVSP,#60HMOVTMOD,#00100000BMOVTL0,#0E8HMOVTH0,#0E8HSETBTR1MOVSCON,#01010000BHERE:JNBRI,HERECLRRIMOVA,SBUFNOPMOVSBUF,AJNBTI,$CLRTIEND13SCON:01010000波特率：T1模式2，初值：E8HORG0000HLJMPMIANORG0023HLJMPSP_INTORG0030HMAIN:MOVSP,#60HMOVR0,#ADDR_RX;发送首址MOVR1,#ADDR_TX；接收首址MOVSCON,#01010000BMOVTMOD,#00100000BMOVTL0,#0E8HMOVTH0,#0E8HSETBTR1SETBESSETBEAACALLSP_OUT;发送子程HERE:SJMPHERESP_INT:JBTI,SEND;发送、接收判断ACALLSP_INSJMPNEXTSEND：ACALLSP_OUTNEXT:RETISP_OUT:CLRTIMOVA,@R0MOVSBUF,AINCR0RETSP_IN:CLRRI;接收子程MOVA,SBUFMOV@R1,AINCR1RET17、单片机的频率串行通信方式参见：p176乙机接收正确回发：00H乙机接收不正确回发：FFH甲机发送：SCON:11010000波特率：T1模式2，初值：E8HORG0000HLJMPMIANORG0023HLJMPSP_INTORG0030HMAIN:MOVSP,#60HMOVR0,#30H;发送首址MOVR7,#0FH；发送字节数M