基于51单片机1602液晶显示简易计算器设计.docx

1、基于51单片机1602液晶显示简易计算器设计#include#include#define uint unsigned int #define uchar unsigned char#define PI 3.141592sbit RS = P20; sbit RW = P21; sbit EN = P22;sbit led=P24;sbit speek=P37;uchar table0=Welcome to use;uchar table1=made by Ms. Li; uchar table2=error;uchar count;void main(void) uchar error=0,

2、i,first=0,dot1,dot2,dot1_num,dot2_num,minus1,minus2;/错误标志、第一次清屏标志、小数点标志以及小数点个数 负号标志、负号个数 uchar Sin,Cos,Tan,ln; uchar Key_num,last_key_num; /键号 uchar flag=0,equal_flag; /运算符、等于符 double num1=0,num2=0,num=0,result=0,save_result; /第一个数、第二个数、计算结果 uchar first_num=0,Ans=0,second_num=0; InitLcd(); EA=1; ET0

3、=1; TMOD=0X01; TH0=(65536-500)/256; TL0=(65536-500)%256; write_com(0x80+0x40+15); write_Dat(0); write_com(0x80); while(1) while(key_scan()=0xff); TR0=1; if(first=0) first=1; write_com(0x01); Key_num=key_scan(); switch(key_scan() case 1: if(last_key_num!=Key_num) write_Dat(l); write_Dat(n); ln=1; bre

4、ak; case 2: if(last_key_num!=Key_num) write_Dat(s); write_Dat(i); write_Dat(n); Sin=1; break; case 3: if(last_key_num!=Key_num) write_Dat(c); write_Dat(o); write_Dat(s); Cos=1; break; case 4: if(last_key_num!=Key_num) write_Dat(t); write_Dat(a); write_Dat(n); Tan=1; break; case 5: if(last_key_num!=K

5、ey_num) write_Dat(); flag=5; break; case 6:write_Dat(7);num=7;break; case 7:write_Dat(8);num=8;break; case 8:write_Dat(9);num=9;break; case 9: if(last_key_num!=Key_num) write_Dat(+); flag=1; break; case 10: if(last_key_num!=Key_num) write_Dat(T); flag=6; break; case 11:write_Dat(4);num=4;break; case

6、 12:write_Dat(5);num=5;break; case 13:write_Dat(6);num=6;break; case 14: if(last_key_num!=Key_num) write_Dat(-); flag=2; break; case 15: if(last_key_num!=Key_num) if(equal_flag=1) write_com(0x01); write_com(0x80); write_Dat(A); write_Dat(n); write_Dat(s); write_Dat(=); save_result=result; else if(Ke

7、y_num!=1&Key_num!=2&Key_num!=3&Key_num!=4&Key_num!=22&Key_num!=23&Key_num!=25) write_Dat(A);write_Dat(n);write_Dat(s); if(flag=0) num1=save_result; first_num=1; else num2=save_result; second_num=1; break; case 16:write_Dat(1);num=1;break; case 17:write_Dat(2);num=2;break; case 18:write_Dat(3);num=3;

8、break; case 19: if(last_key_num!=Key_num) write_Dat(*); flag=3; break; case 21:write_Dat(0);num=0;break; case 22: if(last_key_num!=Key_num) if(flag=0) minus1+; if(minus1=1) write_Dat(-); else minus2+; if(minus2=1) write_Dat(-); break; case 23: if(last_key_num!=Key_num) if(flag=0) dot1+; if(dot1=1) w

9、rite_Dat(.); else dot2+; if(dot2=1) write_Dat(.); break; case 24: if(last_key_num!=Key_num) write_Dat(/); flag=4; break; case 25: if(last_key_num!=Key_num) write_Dat(=); equal_flag=1; break; if(Key_num!=1&Key_num!=2&Key_num!=3&Key_num!=4&Key_num!=15&Key_num!=22&Key_num!=23&Key_num!=25) /第一个数 if(flag

10、=0) num1=num1*10+num; num=0; if(dot1!=0) dot1_num+; first_num=1; if(flag!=0) num2=num2*10+num; num=0; if(dot2!=0) dot2_num+; second_num=1; if(equal_flag=1&first_num=1) if(dot1!=0) num1=num1/pow(10,dot1_num); dot1=0; if(dot2!=0) num2=num2/pow(10,dot2_num); dot2=0; if(minus1!=0) num1=num1*(-1); if(min

11、us2!=0) num2=num2*(-1); if(second_num!=0) switch(flag) case 1:result=num1+num2;break; case 2:result=num1-num2;break; case 3:result=num1*num2;break; case 4: if(num2!=0) result=num1/num2; else write_com(0x80+0x40+10); for(i=0;i0) result=log(num1)+0.005; else write_com(0x80+0x40+10); for(i=0;i50) TR0=0

12、; count=0; void delay(uint x) uchar y; while(x-) for(y=0;y120;y+);void write_com(unsigned char c) RS=0; RW=0; EN=1; delay(5); P0=c; EN=0;void write_Dat(unsigned char c) RS=1; RW=0; EN=1; delay(5); P0=c; EN=0;void InitLcd()write_com(0x38); /display mode write_com(0x06); /显示光标移动位置 write_com(0x0c); /显示

13、开及光标设置 write_com(0x01); /显示清屏uchar key_scan() uchar key_num=0xff; uint temp; P3=0x03; P1=0xe0; temp=(P38)|P1; if(temp&0x03e0)!=0x03e0) delay(10); if(temp&0x03e0)!=0x03e0) P3=0x03; /第一行 P1=0xfe; temp=(P38)|P1; switch(temp) case 0x03de:key_num=1; break; case 0x03be:key_num=2; break; case 0x037e:key_nu

14、m=3; break; case 0x02fe:key_num=4; break; case 0x01fe:key_num=5; break; P3=0x03; /第二行 P1=0xfd; temp=(P38)|P1; switch(temp) case 0x03dd:key_num=6; break; case 0x03bd:key_num=7; break; case 0x037d:key_num=8; break; case 0x02fd:key_num=9; break; case 0x01fd:key_num=10; break; P3=0x03; /第三行 P1=0xfb; tem

15、p=(P38)|P1; switch(temp) case 0x03db:key_num=11; break; case 0x03bb:key_num=12; break; case 0x037b:key_num=13; break; case 0x02fb:key_num=14; break; case 0x01fb:key_num=15; break; P3=0x03; /第四行 P1=0xf7; temp=(P38)|P1; switch(temp) case 0x03d7:key_num=16; break; case 0x03b7:key_num=17; break; case 0x

16、0377:key_num=18; break; case 0x02f7:key_num=19; break; case 0x01f7:key_num=20; break; P3=0x03; /第五行 P1=0xef; temp=(P38)|P1; switch(temp) case 0x03cf:key_num=21; break; case 0x03af:key_num=22; break; case 0x036f:key_num=23; break; case 0x02ef:key_num=24; break; case 0x01ef:key_num=25; break; return k

17、ey_num; void display(double Data) uchar xs=0,fs=0,i; if(Data(long)Data) xs=1; if(Data10) /09 if(xs=1) Data=Data*100; write_com(0x80+0x40+11); if(fs=1) write_Dat(-); else write_Dat( ); write_Dat(long)Data/100+0); write_Dat(.); write_Dat(long)Data/10%10+0); write_Dat(long)Data%10+0); else if(xs=0) wri

18、te_com(0x80+0x40+14); if(fs=1) write_Dat(-); else write_Dat( ); write_Dat(long)Data+0); else if(Data100) /1099 if(xs=1) Data=Data*100; write_com(0x80+0x40+10); if(fs=1) write_Dat(-); else write_Dat( ); write_Dat(long)Data/1000+0); write_Dat(long)Data/100%10+0); write_Dat(.); write_Dat(long)Data/10%1

19、0+0); write_Dat(long)Data%10+0); else if(xs=0) write_com(0x80+0x40+13); if(fs=1) write_Dat(-); else write_Dat( ); write_Dat(long)Data/10+0); write_Dat(long)Data%10+0); else if(Data1000) /100999 if(xs=1) Data=Data*100; write_com(0x80+0x40+9); if(fs=1) write_Dat(-); else write_Dat( ); write_Dat(long)D

20、ata/10000+0); write_Dat(long)Data/1000%10 +0); write_Dat(long)Data/100%10+0); write_Dat(.); write_Dat(long)Data/10%10+0); write_Dat(long)Data%10+0); else if(xs=0) write_com(0x80+0x40+12); if(fs=1) write_Dat(-); else write_Dat( ); write_Dat(long)Data/100+0); write_Dat(long)Data/10%10+0); write_Dat(long)Data%10+0); els