基于51单片机的计算器课程设计报告及实验报告.docx

1、基于51单片机的计算器课程设计报告及实验报告项目一：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：2).实验运行后截图：3.实验代码：#include#include#include#include#includeunsigned 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 = error;/* 键扫描函数 */unsigned char keyscan() /扫描键盘函数 unsigned char k

2、ey_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;break; case

3、 0xdd:num=5;break; case 0xbd:num=6;break; case 0xeb:num=7;break; case 0xdb:num=8;break; case 0xbb:num=9;break; case 0xd7:num=0;break;/按键0 case 0xe7:num=C;break;/按键* case 0xb7:num=;break;/按键# case 0x7e:num=/;break;/按键A case 0x7d:num=*;break;/按键B case 0x7b:num=-;break;/按键C case 0x77:num=+;break;/按键D w

4、hile(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;j16;j+) table1j=0; table2j=0; void main() unsigned char i=0,j; unsigned char key; unsigned char flag_operator = 0; /加减乘除标志位 unsigned char flag_equ = 0

5、; /等于标志位 unsigned char flag_key = 0; /运算位标志 bit flag_MaxValue = 0; bit flag_minus = 0;/负数 long int value = 0; /最终运算结果 unsigned long int value_H =0; /第一个数据 unsigned long int value_L = 0; /第二个数据 unsigned long int temp=1, 10, 100,1000,10000,100000,1000000,10000000,100000000; Initialize_LCD(); while(1)

6、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(j=0; ji; j+) table115-i+j = table115-i+j+1; table115 = key; /table1i = key; i+; if(key = =) for(j=0; j16; j+) /确定运算符位置 if(table1

7、j = =) flag_equ = j; flag_key+; break; if( table1j = + | table1j = - | table1j = * | table1j = /) flag_operator = j; flag_key+; for(j=16-i; jflag_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; fo

8、r(j=flag_operator+1; j15; j+) /第二个数据处理 /value_L = value_L + (table1j-48) * pow( 10 , (flag_equ-j-1) ); value_L = value_L + (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 =

9、 *) value = value_H * value_L; else if(table1flag_operator = /) value = value_H / value_L; if(value = 0) table215 = (value + 48); else if(value2000000000) 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() != C); clear_lcd(); i=0; flag_operator = 0; flag_equ = 0; value = 0; value_H =0; value_L = 0; flag_key = 0; flag_minus=0; ShowString(0,0,table1); ShowString(0,1,table2);