基于51单片机的计算器课程设计报告实验报告

1、项目一：简单计算器1 .实验题目：用51单片机实现简单的计算器功能2 .实验截图:1) .实验运行前截图:WL-S.I. 照 IJOI p工皿 印;由 邱4如 叩F.心 ”! H 午二町Fl 12 a. ,二 iX |J*1I P3 rtf n 1鹏q P3 1-AM丁尸皿行附T?!叫： 王理:A rP,£：曲_LLCD1 . 教育资料2) .实验运行后截图:KiILCDI】中 Fl二尔 n w 如 PliMB PlHMtt MTft 中 r rnuD 向EC n-fWTEIMI q-UMEZ 位Ml 乂，* f ”皿 火/加 K彳*泻Q 短孙BEEc&S AB人回回回日3

2、.实验代码:#include<reg52.h> #include<intrins.h> #include<math.h> #include<defined.H>#include<LCD1602.h>unsigned char table116;/1602第一行显示字符unsigned char table216;/1602第二行显示字符unsigned char code table_error口 = "error"扫描键盘函数/*键扫描函数*/unsigned char keyscan() /unsigned c

3、har key_l,key_h,addres,num;P0=0x0f;key_l=P0;P0=0xf0;key_h=P0;addres=key_l | key_h;if(addres!=0xff)Delayms(1);if(addres!=0xff)P0=0x0f;key_l=P0;P0=0xf0;key_h=P0；addres=key_l | key_h;switch(addres)case 0xee:num='1'break;case 0xde:num='2'break;case 0xbe:num='3'break;case 0xed:num

4、='4'break;case 0xdd:num='5'break;case 0xbd:num='6'break;case 0xeb:num='7'break;case 0xdb:num='8'break;case 0xbb:num='9'break;按键0 按键* 按键# 按键A 按键B 按键C 按键Dcase 0xd7:num='0'break;/case 0xe7:num='C'break; case 0xb7:num='='break;/ cas

5、e 0x7e:num='/'break;/ case 0x7d:num='*'break;/ case 0x7b:num='-'break;/ case 0x77:num='+'break;/while(addres!=0xff)P0=0x0f;key_l=P0;P0=0xf0;key_h=P0； addres=key_l | key_h;return num;return 0;void clear_lcd(void)/ 清屏unsigned char j;for(j=0;j<16;j+)table1j='0'

6、;table2j='0' void main()unsigned char i=0,j;加减乘除标志位/等于标志位/运算位标志/最终运算结果/第一个数据/第二个数据unsigned char key;unsigned char flag_operator = 0;unsigned char flag_equ = 0;unsigned char flag_key = 0;bit flag_MaxValue = 0;bit flag_minus = 0;/ 负数long int value = 0;unsigned long int value_H =0;unsigned long

7、 int value_L = 0;unsigned long int temp=1, 10, 100,1000,10000,100000,1000000,10000000,100000000;Initialize_LCD();while(1) key=keyscan(); if(key != 0) if(key = 'C')/清除键C按下 clear_lcd();i=0;flag_operator = 0; flag_equ = 0; value = 0; value_H =0; value_L = 0; flag_key =0; flag_minus=0; else for(

8、j=0; j<i; j+) table115-i+j = table115-i+j+1;table115 = key;table1i = key; i+；if(key ='=') for(j=0; j<16; j+)/确定运算符位置if(table1j='=') flag_equ = j; flag_key+; break;if( table1j = '+' | table1j = '-'| table1j ='*'| table1j='/') flag_operator = j; fl

9、ag_key+; for(j=16-i; j<flag_operator; j+)/ 第一个数据处理);/value_H = value_H + (table1j-48)* ( pow( 10 , (flag_operator-j-1)value_H = value_H + (table1j-48) * tempflag_operator-j-1;for(j=flag_operator+1; j<15; j+)/ 第二个数据处理/value_L = value_L + (table1j-48) * pow( 10 , (flag_equ-j-1);value_L = value_L

10、 + (table1j-48) * tempflag_equ-j-1;if(table1flag_operator = '+')value = value_H + value_L;else if(table1flag_operator='-')value = value_H - value_L;else if(table1flag_operator = '*') value = value_H * value_L;else if(table1flag_operator = '/')value = value_H / value_L

11、; if(value = 0)table215 = (value + 48);else if(value<0) value = abs(value);flag_minus = 1;else if(value>2000000000)flag_MaxValue = 1;/break;j=15;while(value!=0) table2j = (value%10 + 48); value = value/10;j-;if(flag_minus)/ 负数table2j='-' if(flag_key >2 | table10 = '0' | flag_MaxValue=1 ) ShowString(5,1,table_error);while(keyscan(