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代碼如下
#include <stc15f2k60s2.h>
unsigned char s0;
int temp;
void keyscan16();
void delay(int a);
unsigned char s0=0;
void main()
{P2=0XA0;P0=0X00;P2=0X80;P0=0xff;
while(1)
{keyscan16() ;
if(s0==1)
{s0=0;
P2=0XC0;
P0=0X01;
P2=0XFF;
P0=0XC0;
}
else if(s0==2)
{s0=0;
P2=0xc0;
P0=0X02;
P2=0XFF;
P0=0XF9;
}
}
}
void delay(int a)
{int i,b;
for(i=a;a--;a>0)
{for(b=850;b--;b>0);}
}
void keyscan16()
{
P3=0x7f;
temp=P3&0x0f;
if(temp!=0x0f)
{delay(5);
temp=P3&0X0F;
if(temp!=0x0f)
{temp=P3;
switch (temp)
{case 0x7e:s0=1;break;
case 0x7d:s0=2;break;
case 0x7b:s0=3;break;
case 0x77:s0=4;break;
}
}
while(temp!=0x0f)
{temp&=0x0f;
}
}
P3=0XBF;temp=P3&0X0F;
if(temp!=0x0f)
{delay(5);
temp=P3&0XBF;
if(temp!=0x0f)
{temp=P3;
switch(temp)
{case 0xbe:s0=5;break;
case 0xbd:s0=6;break;
case 0xbb:s0=7;break;
case 0xb7:s0=8;break;
}
}
while(temp!=0x0f)
{temp&=0x0f;
}
}
P3=0XDF;temp=P3&0X0F;
if(temp!=0x0f)
{delay(5);
temp=P3&0x0f;
if(temp!=0x0f)
{temp=P3;
switch(temp)
{case 0xbe:s0=9;break;
case 0xbd:s0=10;break;
case 0xbb:s0=11;break;
case 0xb7:s0=12;break;
}
while(temp!=0x0f)
{temp=P3&0x0f;
}
}
}
P3=0X7F;temp=P3&0X0F;
if(temp!=0x0f)
{delay(5);
temp=P3&0x0f;
if(temp!=0x0f)
{temp=P3;
switch(temp)
{case 0x7e:s0=13;break;
case 0x7d:s0=14;break;
case 0x7b:s0=15;break;
case 0x77:s0=16;break;
}
while(temp!=0x0f)
{temp=P3&0x0f;
}
}
}
}
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