51单片机简易计算器-(可算小数)

51 单片机简易计算器 include include define uchar unsigned char define uint unsigned int sbit beep P2 3 sbit dula P2 6 sbit wela P2 7 sbit rw P1 1 sbit rs P1 0 sbit lcden P2 5 void yunsuan void keyinput char s void write data char ddata void write com char command void display long a void init void dealerror void dataoverflow void welcome char code table1 0 xee 0 xde 0 xbe 0 x7e 0 xed 0 xdd 0 xbd 0 x7d 0 xeb 0 xdb 0 xbb 0 x7b 0 xe7 0 xd7 0 xb7 0 x77 char code table2 789 456 123 0 char j k temp temp1 temp2 key mchar m flag2 0 flag3 0 long x y num int operators input iny char error 5 error char overflow 8 overflow char welcome 16 welcome to use void delay uint x 延时 uint a b for a x a 0 a for b 10 b 0 b void delay ms uint x 延时 uint a b for a x a 0 a for b 110 b 0 b void write com uchar com 写命令 P0 com rs 0 lcden 0 delay 10 lcden 1 delay 10 lcden 0 void write data uchar date 写数据 P0 date rs 1 lcden 0 delay 10 lcden 1 delay 10 lcden 0 long ming int x long m switch x case 9 m return m break case 8 m return m break case 7 m return m break case 6 m return m break case 5 m return m break case 4 m 10000 return m break case 3 m 1000 return m break case 2 m 100 return m break case 1 m 10 return m break case 0 m 1 return m break void display long a long d int i flag1 0 temp c 1 init if a 0 i d ming i temp a d a a d if temp 0 else write data 0 x30 temp flag1 1 if i 2 write data flag1 1 void init LCD 初始化 rw 0 dula 0 wela 0 write com 0 x38 显示模式设置 16 2 显示 5 7 点阵 8 位数据接口 delay 20 write com 0 x0e 显示模式设置 delay 20 write com 0 x06 显示模式设置 光标右移 字符不移 delay 20 write com 0 x01 清屏幕指令 将以前的显示内容清除 delay 20 void yunsuan 运算 if iny switch operators case 1 x x y num x if num display num else dataoverflow break case 2 x x y num x if num display num else dataoverflow break case 3 x x y num x 100 if num display num else dataoverflow break case 4 if y 0 dealerror else if y 100 x x 100 y y 100 y y 100 x x y num x if num display num else dataoverflow break y 0 void dealerror 除数为 0 int i 0 write com 0 x01 for i 0 i 5 i write data error i void dataoverflow 数值溢出 int i 0 write com 0 x01 for i 0 i 8 i write data overflow i void welcome 欢迎界面 int i 0 write com 0 x01 for i 0 i 16 i write data welcome i void keyinput char s 键盘输入 if s 0 判断按下的键是否为数值 if flag3 0 num num 10 100 s 0 else num num 10 10 s 0 if flag2 1 num num 10 flag3 1 if operators 0 y num iny 1 else x num if num 当前数值是否超出限定范围 display num else dataoverflow else switch s case iny 0 operators 0 flag2 1 break case write data table2 14 delay 10 yunsuan iny 0 operators 0 num 0 flag2 0 flag3 0 break case if operators yunsuan operators 1 write data table2 15 num 0 flag2 0 flag3 0 break case if operators yunsuan operators 2 write data table2 11 num 0 flag2 0 flag3 0 break case if operators yunsuan operators 3 write data table2 7 num 0 flag2 0 flag3 0 break case if operators yunsuan operators 4 write data table2 3 num 0 flag2 0 flag3 0 break void main 主函数 char i char flag0 1 init welcome for i 0 i 10 i delay ms 100 init while 1 P3 0 x