#include<REG52.h>
sbit duan_xuan=P1^3;
sbit wei_xuan=P1^4;
unsigned char table[]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90}; 共阳字型吗
unsigned char table1[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; 位选吗
void delay_ms(unsigned int i) //延时函数，无符号字符型变量i为形式参数
{
unsigned int j,k; //定义无符号字符型变量j和k
for(k=0;k<i;k++) //双重for循环语句实现软件延时
for(j=0;j<120;j++);
}
void main(void)
{
unsigned char i;
while(1)
{
for(i=0;i<8;i++)
{
wei_xuan=1;
P2=table1[i];
wei_xuan=0;
duan_xuan=1;
P2=table[i];
duan_xuan=0;
delay_ms(1);
}
}
}
|
