74HC595練習程序

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

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) //發送數據
{
unsigned char i;
for(i=0;i<8;i++) //把每一位數據移入寄存器
{
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);
}
}