单片机 简易计算器 设计报告2

河北工业大学计算机硬件技术基础（MCS-51单片机原理及应用）课程设计报告1．题目：简易计算器2．目的：实现简单的四则运算有健闭合否调用显示程序，延时6ms有健闭合否调用显示程序，延时6ms两次调12ms有键闭合否YNN开始判断键号存到OP中判断有无运算符存到OP1中存到OP2中调运运算子程序结果存到OP1压栈显示子程序闭合键释放否输入键开始NY数字符号无有4．源程序： org0000h;初值赋予变量（扫描部分）opequ20h op1equ21h op2equ22hstart: movsp,#60h；键盘的初始化 movdptr,#0ff20h mova,#03h movx@dptr,a mov70h,#00 movop,#00 movop1,#00 movop2,#00key1: acallks1；判键是否按下 jnzlk1n1: acalldir ajmpkey1lk1: acalldir；判键抖动 acalldir acallks1 jnzlk2 acalldir ajmpkey1lk2: movr2,#0feh movr4,#0lk4: movdptr,#0ff21h；扫描行程序 mova,r2 movx@dptr,a incdptr incdptr movxa,@dptr jbacc.0,lone mova,#07h ajmplkplone: jbacc.2,next mova,#01h ajmpkey1lkp: adda,r4；确认键号 mov51h,a cjnea,#0ah,l1 movop,a ajmpkey1l1: jcqq；分类处理 movop,a ajmpkey1qq: mova,op jnzm2m1: mova,#10；储存数字ｏｐ１，ｏｐ２ movb,op1；运算符存入ｏｐ mulab adda,70h movop1,a pushacc ajmpppm2: mova,#10 movb,op2 mulab adda,70h movop2,app: mov70h,a；压栈程序（显示缓存） pushacclk3: acalldir；判键释放程序 acallks1 jnzlk3 popacc ajmpkey1next: incr4；判列扫描 mova,r2 jnbacc.7,knd rla movr2,a ajmplk4knd: ajmpkey1ks1: movdptr,#0ef21h；判键按下子程序 mova,#0 movx@dptr,a incdptr incdptr movxa,@dptr cpla anla,#1fh retdir: cplp1.0；键码显示 movr0,#70h mova,@r0 anla,#0fh mov30h,a mova,@r0 swapa anla,#0fh mov31h,a movr0,#30h movr3,#01hdo1: mova,r3 movdptr,#0ef21h movx@dptr,a incdptr mova,@r0 adda,#0dh movca,@a+pcdir1: movx@dptr,a；移位显示 acalldl mova,r3 rla jbacc.2,ld1 movr3,a incr0 ajmpdo1ld1: retdseh: db0f8h,99h,80h,92h,90h,82h,88h,83h；扫描码表 db0f9h,0c0h,0a4h,081h,0b0h,086h,0c6h,0a1hdl: movr7,#2；延时子程序dl1: movr6,#0ffhdl2: djnzr6,dl2 djnzr7,dl1 retcalc: movr7,op；运算程序加，减，乘，除 cjner7,#0ah,notadd；运算部分 clrc mova,op1 adda,op2 sjmpfcalcnotadd: cjner7,#0bh,notsub clrc mova,op1 subba,op2 sjmpfcalcnotsub: cjner7,#0ch,notmul clrc mova,op1 movb,op2 mulab sjmpfcalcnotmul: clrc mova,op1 movb,op2 divab sjmpfcalcfcalc: mov50h,a；显示结果及运算数（显示部分） anla,#0fh mov72h,a mova,50h swapa anla,#0fh mov73h,adisp: movr3,#01h movr0,#70h mova,r3 movdptr,#0ff21h movx@dptr,a movdptr,#0ff22h mova,@r0 adda,#03h movca,@a+pc movx@dptr,a acalldlay db0c0h,0f9h,0a4h,0b0h,99h,92h,82h,0f8h,；字形码表db 80h,90h,88h,83h,0c6h,0a1h,86h,8ehdlay: movr7,#02h；延时子程序dlay1: movr6,#0ffhdlay2: djnzr6,dlay2 djnzr7,dlay1 ret end程序分三大模块，是键盘扫描与运算及结果显示，程序顺序排列。5．硬件使用。ｐｃ机，并行接口８１５５一片，ＤＩＣＥ－５０１３Ｓ实验系统一个使用方法：键盘0~9实现数字的输入，A,B,C,D分别代表+,-,*,/运算符号6．心得体会通过本次设计，对键盘的处理熟悉了不少，同时对单片机的指令的正确使用也有了更进一步的了解。深知编程完全是一点都错不得的，出现任何一个微小的错误都会导致