c51 74hc164--165--595c51
51單片機驅動74ls164跑馬燈,好處是只用了2個端口即可實現，電路如下圖所示：
#include<reg51.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
sbit dat=P2^6;
sbit clk=P2^7;
uchar ii;
uchar code seg7code[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x00,0xff};//0-9,-,全滅
void sendbyte(uchar seg)
{
uchar num,c;
num=seg7code[seg];
for(c=0;c<8;c++)
{
dat=num&0x80;
num=_crol_(num,1);
clk=0;
clk=1;
}
}
void delayms(int ms)
{
uchar mi,mj;
for(;ms>0;ms--)
for(mi=6;mi>0;mi--)
for(mj=82;mj>0;mj--);
}
void main()
{
for(ii=0;ii<10;ii++)
{
sendbyte(ii);
delayms(200);
}
}