calculator.c

lcd1602显示

#include<reg52.h>
#include<math.h>
#include"data.h" 
#include"delay12.h"
#include"lcd1602.h"
uchar temp,key,i,flag=0,z=4,flag1=0;
signed long a=0,b=0;	
uchar code table2[]="0123456789+-*/= ";
uchar code table1[]={0xee,0xde,0xbe,0x7e,
					0xed,0xdd,0xbd,0x7d,
					0xeb,0xdb,0xbb,0x7b,
					0xe7,0xd7,0xb7,0x77};
uchar code table3[]="0123456789 ";
uchar code table4[]="error";
uchar code table5[]="Please input";
uchar code table6[]=".";
void qingling()//清零函数
{	
	uchar x; 
	flag=0;
	a=0,b=0;
	init();
	writecom(0x80+0x40);
	for(x=0;x<12;x++)
	{
		writedata(table5[x]);
	}	
}
void display(a0,a1,a2,a3,a4,a5,a6,a7,a8)//1602显示函数
{
	writecom(0x80+1);
	writedata(table3[a0]);
	writecom(0x80+2);
	writedata(table3[a1]);	
	writecom(0x80+3);
	writedata(table3[a2]);	
	writecom(0x80+4);
	writedata(table3[a3]);	
	writecom(0x80+5);
	writedata(table3[a4]);
	writecom(0x80+6);
	writedata(table3[a5]);
	writecom(0x80+7);
	writedata(table3[a6]);	
	writecom(0x80+8);//小数点
	writedata(table6[0]);	
	writecom(0x80+9);//小数点后一位
	writedata(table3[a7]);	
	writecom(0x80+10);//小数点后两位
	writedata(table3[a8]);			
}
void error()//提示错误
{
	uchar x=0;
	for(x=0;x<5;x++)
	{
		writecom(0x80+0x40+x);
		writedata(table4[x]);
	}
}
void turn(signed long c)//转换数字到1602上显示
{
	uchar A0=0,A1=0,A2=0,A3=0,A4=0,A5=0,A6=0,A7=0,A8=0;
	A0=c/100000000;if(A0==0)A0=10;
	A1=c%100000000/10000000;if(A0==10){if(A1==0)A1=10;}
	A2=c%100000000%10000000/1000000;if(A1==10){if(A2==0)A2=10;}
	A3=c%100000000%10000000%1000000/100000;if(A2==10){if(A3==0)A3=10;}
	A4=c%100000000%10000000%1000000%100000/10000;if(A3==10){if(A4==0)A4=10;}
	A5=c%100000000%10000000%1000000%100000%10000/1000;if(A4==10){if(A5==0)A5=10;}
	A6=c%100000000%10000000%1000000%100000%10000%1000/100;
	A7=c%100000000%10000000%1000000%100000%10000%1000%100/10;
	A8=c%100000000%10000000%1000000%100000%10000%1000%100%10/1;
	display(A0,A1,A2,A3,A4,A5,A6,A7,A8);	
}
int select(uchar num)
{		
	uchar y;
	if(num==11)y=1;
	if(num==12)y=2;
	if(num==13)y=3;
	if(num==14)y=4;
	return y;	
}
signed long jisuan(signed long m,signed long n,uchar v)//计算器计算部分
{
	signed long t;
	switch(v)
	{
		case 0:	t=m+n;flag1=0;break;
		case 1: t=m-n;flag1=0;break;									
		case 2: t=m*n;flag1=0;break;
		case 3: if(n==0){error();flag1=1;}else t=(m*100)/n;flag1=2;break;
	}return t;	
}
void  detection()//检测数字和符号a,b<65536.并显示
{
		uchar A0=0,A1=0,A2=0,A3=0,A4=0,chu=0,num;
		signed long s;
		P1=0xf0;		
			if(P1!=0xf0)//检测按键
			{
				delays();
				if(P1!=0xf0)
				{
					temp=P1;
					P1=0x0f;
					key=temp|P1;
					for(i=0;i<16;i++)
					if(key==table1[i])
					{num=i;break;}
				}
				delay(30);
				while(num==15)
				{
					num=16;
					qingling();
				}
				if(flag==0)	 //输入并显示第一个数字
				{
					if(num<10)
					{	init();
						a=(num+a*10);
						if(a>10000000)error();
						else turn(a*100);
					}
					else
					{
						if(num<14)
							{
								init();
								flag=1;
								z=select(num);
								writecom(0x80+15);
								writedata(table2[num]);
							}
					}
				}
				if(flag==1)//输入并显示第二个数字
				{		
					if(num<10)
					{
						b=num+b*10;
						if(b>10000000)error();
						else turn(b*100);
					}
					if(num==14)flag=2;																
				}
				if(flag==2||num==14)//输出结果
				{	
					init();
					
					s=jisuan(a,b,z);
					if(s<0)
					{
						writecom(0x80);
						writedata(table2[11]);
						s=fabs(s);
					}
					if(flag1==2)turn(s);
					if(flag1==0)turn(s*100);
					if(num==15)
					{
						while(num==15)
						{
							num=17;
							init();
							qingling();
						}
					}
					flag=0;
					a=s;
					b=0;
				}					
			}
}