74HC595練習(xí)程序

//74HC595練習(xí)程序
//串入并出實現(xiàn)16流水燈效果
//2009.12.28
#include"reg52.h"
sbit shcp=P2^0;           //數(shù)據(jù)在上升沿進入移位寄存器
sbit date1=P2^1;           //串行數(shù)據(jù)輸入端
sbit clock=P2^2;   //上升沿時將數(shù)據(jù)輸出到并行端口

unsigned char tab[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
unsigned char tab1[]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};

void delay(unsigned int delay)
{
        unsigned char i;
        for(;delay>0;delay--)
                for(i=0;i<125;i++);
}

void send_data(unsigned char date)          //發(fā)送數(shù)據(jù)
{
        unsigned char i;
        for(i=0;i<8;i++)                                  //把每一位數(shù)據(jù)移入寄存器
        {
                date=date<<1;
                date1=CY;
                shcp=0;
               
                shcp=1;       
               
        }       
}

void main()
{
        unsigned char k;
        for(k=0;k<16;k++)
        {
                send_data(tab[k]);
             send_data(tab1[k]);
                {clock=0;clock=1;};
                delay(1000);
        }               
}