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/***********74HC595動(dòng)態(tài)掃描1位數(shù)碼管************/
//MCU：AT89S52RC
//晶振：11.0592M.
//采用1位數(shù)碼管
/***************************************************/
#include<reg51.h>
#include <INTRINS.H>
#define uint unsigned int
#define uchar unsigned char
#define nop() _nop_();_nop_();
sbit CLK=P2^0; //74HC595的11引腳
sbit DAT=P2^1; //74HC595的14引腳
sbit RCLK=P2^2; //74HC595的12引腳
//本程序支持1位共陽(yáng)和共陰數(shù)碼管可根據(jù)你的數(shù)碼管是共陰還是共陽(yáng),開(kāi)啟下面匹配的tab[]
// 0 1 2 3 4 5 6 7 8 9 A B C D E F 全亮全滅
//uchar code tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0x00,0xff}; //共陽(yáng)數(shù)碼管不顯示0xff 全亮0x00 只顯示點(diǎn)0x7f
uchar code tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0xff,0x00}; //共陰數(shù)碼管不顯示0x00 全亮0xff 只顯示點(diǎn)0x80
uchar t;
uchar count = 0;
/* //延時(shí)函數(shù)
void delay(uchar z)
{
uchar x,y;
for(x=z;x>0;x--)
for(y=120;y>0;y--);
}
*/
//寫(xiě)數(shù)碼管函數(shù)
void write595(unsigned char word,uchar k1)
{
uchar num,c; //變量
if(k1==1){ //如果k1的值為1,則點(diǎn)亮小數(shù)點(diǎn))
num=tab[word]|0x80; //關(guān)鍵就在|0x80
} else {
num=tab[word];
}
//循環(huán)8個(gè)LED
for(c=0;c<8;c++)
{
CLK=0;
DAT=num&0x80;
num=num<<1;
CLK=1;
}
RCLK=0;
//nop();
//nop();
RCLK=1;
}
void init() //啟動(dòng)定時(shí)器
{
TMOD=0X01;
TH0=(65535-46080)/256;
TL0=(65535-46080)%256;
ET0=1;
EA=1;
TR0=1;
}
void T0_time() interrupt 1 //定時(shí)器
{
if (count == 20) {
t++;
count = 0;
} else {
++count;
}
}
int main(void) //主程序
{
//unsigned char i;
init(); //啟動(dòng)定時(shí)器
while(1)
{ //無(wú)限循環(huán)
if(t>9) {t=0;} //當(dāng)t>9,則初始為0
write595(t,0); //要寫(xiě)的值
//for(i=0;i<10;i++) _nop_();
}
}

復(fù)制代碼

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