C51单片机七段数码管简单显示数字

/**********************************************/ /*用扫描法依次在七段数码管上显示12345670八个数*/ /**********************************************/ #include

#define uchar unsigned char

#define uint unsigned int

#define data_duan P0 //段选

#define data_wei P2 //位选

void delay(uchar a);

uchar code num[]={

0x3f,0x06,0x5b,0x4f,0x66,

0x6d,0x7d,0x07,0x7f,0x6f};

void main()

{

uchar i;

while(1)

{

for(i=0;i<8;i++)

{

data_duan=num[i];

delay(5);

data_wei=i;

}

}

}

void delay(uchar a)

{

uchar b;

for(a;a>0;a--)

for(b=110;b>0;b--); }