基于51单片机的简易计算器带PCB文件与原理图 -

#include<reg52.h>
#include<stdio.h>
#include<string.h>
#include<math.h>
#define PI 3.1415926
#define uint unsigned int
#define uchar unsigned char
#define ulong unsigned long
uchar table[20]="";
float a=0;
sbit dula=P2^6;
sbit wela=P2^7;
sbit lcden=P2^5;
sbit lcdrs=P1^0;
sbit ledrw=P1^1;
sbit k1=P1^4;
sbit k2=P1^5;
sbit k3=P1^6;
sbit k4=P1^7;
uchar shift;//shift键
uchar saojiao;//三角函数flag sin 1,cox 2,tan 3,asin 4,acos 5,atan 6
int flag1=0; //判断是否之前输出了等号，继续计算改为第一行
uchar num;
uint t=0;
uchar temp;
float p=0.1;
int q=0;
//int o; 判断等号运算后是否为整数
//float p; 判断等号运算后是否为整数
void keyscan();
void dulianjian();
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void write_com(uchar com)
{
lcdrs=0;
P0=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_data(uchar date)
{
lcdrs=1;
P0=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void init()
{
ledrw=0;
dula=0;
wela=0;
lcden=0;
write_com(0x38);
write_com(0x0e);
write_com(0x06);
write_com(0x01);
}
void main()
{
init();
while(1)
{
keyscan();
dulianjian();
}
}
void dulianjian()
{
if(k1==0)
{
delay(20); //消抖
if(k1==0)
{
while(!k1);
if(shift==0)
{
saojiao=1;
write_data('s');q++;if(q>16)write_com(0x18);
write_data('i');q++;if(q>16)write_com(0x18);
write_data('n');q++;if(q>16)write_com(0x18);
}
if(shift==1)
{
saojiao=4;
write_data('a');q++;if(q>16)write_com(0x18);
write_data('s');q++;if(q>16)write_com(0x18);
write_data('i');q++;if(q>16)write_com(0x18);
write_data('n');q++;if(q>16)write_com(0x18);
shift=0;
}
}
}
if(k2==0)
{
delay(20); //消抖
if(k2==0)
{
while(!k2);
if(shift==0)
{
saojiao=2;
write_data('c');q++;if(q>16)write_com(0x18);
write_data('o');q++;if(q>16)write_com(0x18);
write_data('s');q++;if(q>16)write_com(0x18);
}
if(shift==1)
{
saojiao=5;
write_data('a');q++;if(q>16)write_com(0x18);
write_data('c');q++;if(q>16)write_com(0x18);
write_data('o');q++;if(q>16)write_com(0x18);
write_data('s');q++;if(q>16)write_com(0x18);
shift=0;
}
}
}
if(k3==0)
{
delay(20); //消抖
if(k3==0)
{
while(!k3);
if(shift==0)
{
saojiao=3;
write_data('t');q++;if(q>16)write_com(0x18);
write_data('a');q++;if(q>16)write_com(0x18);
write_data('n');q++;if(q>16)write_com(0x18);
}
if(shift==1)
{
saojiao=6;
write_data('a');q++;if(q>16)write_com(0x18);
write_data('t');q++;if(q>16)write_com(0x18);
write_data('a');q++;if(q>16)write_com(0x18);
write_data('n');q++;if(q>16)write_com(0x18);
shift=0;
}
}
}
if(k4==0)
{
delay(20); //消抖
if(k4==0)
{
while(!k4);
shift=1;
}
}
}
void keyscan()
{
char size;
float shu_1,shu_2;
uint num;
uchar m;
P3=0xfe;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xee:num=1;write_data('1');q++;if(q>16)write_com(0x18);
break;
case 0xde:num=2; write_data('2');q++;if(q>16)write_com(0x18);
break;
case 0xbe:num=3; write_data('3');q++;if(q>16)write_com(0x18);
break;
case 0x7e: num=11;;
if(flag1==1){
init();flag1=0;q=strlen(table);for(num=0;table[num]!='\0';num++)
{
write_data(table[num]);
delay(5);
}
}
write_data('+'); p=0.1;m=0;q++;if(q>16)write_com(0x18);
{
t++;
if(t==1&&saojiao==0)shu_1=a;
if(t>=2&&saojiao==0)
{
if(size=='+')shu_1+=a;
if(size=='-')shu_1-=a;
if(size=='*')shu_1*=a;
if(size=='/')shu_1/=a;
}
if(saojiao==1)
{
shu_1=sin(a*(2*PI/360));
saojiao=0;
}
if(saojiao==2)
{
shu_1=cos(a*(2*PI/360));
saojiao=0;
}
if(saojiao==3)
{
shu_1=tan(a*(2*PI/360));
saojiao=0;
}
if(saojiao==4)
{
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