独立按键程序代码

本程序是看霖峰老师课程时记录的，谢谢老师独立按键程序

#include

#define uchar unsigned char

#define uint unsigned int

unsigned char smg_du[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07}; unsigned char sum_wei[]={0x00,0x10,0x20,0x30,0x40,0x50,0x60,0x70};

sbit key1=P3^2;

sbit led0=P1;

void delay_50us(uint t)

{

uchar j;

for(t;t>0;t--)

for(j=19;j>0;j++);

}

void main()

{

uchar num;

P3=0xff;

while(1)

{

if(key1==0)

{

delay_50us(200);

if(key1==0);

{

num++;

led0=0;

if(num==10)

num=0;

while(!key1);

}

delay_50us(200);

while(!key1);

}

else

led0=1;

P1=smg_du[num];

}

}