数码管跑灯

最近打算做一个硬件触摸板的控制系统，所以开始学硬件。

开一周的小差，加油！

/*=============================程序说明===============================
项目名称:    数码管跑灯
作    者:    Rain
创建日期:    2011-10-30
修改说明:
程序说明:
(1)CPU 型号:    AT89S52
(2)时钟频率:    12
(3)实现功能:
(4)程序概述:
===================================================================*/
//==========================头文件加载===============================
#include <reg52.h>
//===========================端口声明================================

//=========================全局常量声明==============================

//=========================全局变量声明==============================
unsigned char i=0,flag = 0;
//unsigned char Data[]={1,9,8,8,0,3,1,9};
//===========================函数声明================================
void delay(unsigned int Time);
void display(unsigned int i,unsigned char a);
void main() {
    P1 = 0xf5;
    

    while(1) {
        switch (i) {
            case 0:
                display(i,0xf7);
                display(0,0xfb);
                display(0,0xfd);
                display(0,0xfe);
                    break;
            case 7:
                display(7,0xfe);
                display(7,0xdf);
                display(7,0xef);
                display(i,0xf7);
                    break;
            default:
                if(flag==0) {
                    display(i,0xfe);
                } else {
                    display(i,0xf7);
                }
                    break;
        
        }
        if(flag == 0) {
            ++i;
            if(i == 8) {
                i = 6;
                flag = 1;
            }
        } else {
            --i;
            if(i == -1) {
            i = 1;
            flag = 0;
            }
        }
    }
}

void display(unsigned int i,unsigned char a) {
    P2 = 0xf9;
    P0 = a;
    WR = 0;    WR = 1;
    //delay(50000);
    
    P2 = 0xf8;
    P0 = ~(1<<(i));
    WR = 0;WR = 1;
    delay(10000);
    
    P2 = 0xf8;
    P0 = 0xff;
    WR = 0;WR = 1;
    delay(10000);
}

void delay(unsigned int Time)
{
    while(Time--);
}