1.c

单片机的开发,实现计算器功能,可以很方便地使用

#include<reg51.h>
#define uchar unsigned char
char code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
uchar code select[]={0x01,0x02};
uchar data table1[]={0x00,0x00};
int count;
sbit k=P1^0;
delay(uchar m)
{
uchar i,j;
for(i=m;i>0;i--)
for(j=0;j<120;j++);
}
scan()
{
uchar i;
  
table1[1]=table[count/10];
table1[0]=table[count%10];
for(i=0;i<2;i++)
{
  P2=select[i];
  P0=table1[i];
  delay(1);
  P0=0xff;

}

}
keyscan()
{
if(k==0)
{
delay(10);
if(k==0)
{
while(k==0);
count++;
if(count==100)
count=0;
}
}
}
void main()
{
while(1)
{
keyscan();
scan();
}
}