下面是 74ls164 驅(qū)動(dòng) 共陽(yáng)數(shù)碼管的演示程序

#include

#define uint unsigned int

#define uchar unsigned char

sbit DAT=P1^1; //模擬串口數(shù)據(jù)發(fā)送端

sbit CLK=P1^2;//模擬時(shí)鐘控制端

uchar code tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xff};//0-9,-,全滅 (共陽(yáng)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即十進(jìn)制的128, 二進(jìn)制的10000000 按位發(fā)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;

}

}

下面這段是74ls164 驅(qū)動(dòng)共陰數(shù)碼管的程序源碼

#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,-,全滅

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;

}

}