74ls164 驱动 共阳数码管的演示程序

#include

#define uint unsigned int

#define uchar unsigned char

sbit DAT=P1^1; //模拟串口数据发送端

sbit CLK=P1^2;//模拟时钟控制端

uchar code tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xff};//0-9,-,全灭 (共阳字段表)

void sendbyte(uchar byte)

{   

        uchar num,c;

        num=tab[byte];

   for(c=0;c<8;c++)

        {

    CLK=0;

  DAT=num&0x80; //(0x80即十进制的128, 二进制的10000000 按位发送)

  CLK=1;

         num<<=1;

         }

}

void delay_50ms(unsigned int t) //50MS演示程序

{

 unsigned int j;  

 for(;t>0;t--)

  for(j=6245;j>0;j--)

{;}

}

main()

{ 

 unsigned char h;

  while(1){

  for(h=0;h<10;h++){

       delay_50ms(1);

       sendbyte(h);

  delay_50ms(10);

  }

  h=0;

    }

}

下面这段是74ls164 驱动共阴数码管的程序源码

#include

#define uint unsigned int

#define uchar unsigned char

sbit DAT=P1^1;

sbit CLK=P1^2;

uchar code tab[]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xff,0xf6};//0-9,-,全灭

void sendbyte(uchar byte)

{   

        uchar num,c;

        num=tab[byte];

   for(c=0;c<8;c++)

        {

    CLK=0;

  DAT=num&0x01;

  CLK=1;

         num>>=1;

         }

}

void delay_50ms(unsigned int t)

{

 unsigned int j;  

 for(;t>0;t--)

  for(j=6245;j>0;j--)

{;}

}

 main()

{ 

 unsigned char h;

  while(1){

  for(h=0;h<10;h++){

       delay_50ms(1);

       sendbyte(h);

  delay_50ms(10);

  }

  h=0;

    }

}