51單片機加74hc595加時鐘程序Proteus仿真無按鍵

ID:899160 · 發表于 2021-4-30 19:50

用 2 個 74LS595 芯片設計 8 位顯示電路，，實現“時、分、秒、ms”走時顯示，“時、分、秒、ms”分別用 2 位數碼顯示

順便附上關于我理解595b站視頻

視頻連接：74HC595原理講解，嵌入式系統原理及設計，單片機開發_嗶哩嗶哩 (゜-゜)つロ干杯~-bilibili

單片機源程序如下:

#include<reg52.h>
sbit LATCH=P2^0; //輸出時鐘
sbit SRCLK=P2^1; //輸入時鐘
sbit SDATA=P2^2; //數據輸入
//unsigned char BJTY_DuanMa[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//筆芯碼
unsigned char BJTY_DuanMa[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//筆芯碼
unsigned char BJTY_WeiMa[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};//位選碼
unsigned char x=0,k,b=0;
unsigned char showdata[10]=0;
unsigned int hour,min,sec,mil,count;
unsigned int hour1,min1,sec1,mil1,count1;
unsigned int hour2,min2,sec2,mil2,count2;
void init()
{
count=0;
hour=00;
min=00;
sec=00;
mil=00;
hour1=0;
hour2=0;
min1=0;
min2=0;
sec1=0;
sec2=0;
mil1=0;
mil2=0;
TMOD=0x01;//定時器1
TH0=(65536-10000)/256;//大約10ms
TL0=(65536-10000)%256;
TR0=1;
ET0=1;
EA=1;
}
void count0() interrupt 1
{
TH0=(65536-10000)/256;
TL0=(65536-10000)%256;
mil++;
if(mil==100)
{
mil=0;
sec++;
if(sec==60)
{
sec=0;
min++;
if(min==60)
{
min=0;
hour++;
if(hour==24)
{
hour=0;
}
}
}
}
}
void delay1ms(unsigned int x)//延時函數
{
unsigned int i,j;
for(j=0;j<x;j++)
for(i=0;i<123;i++);
}
void LAT595(void)//輸出時鐘發出上升沿
{
LATCH=0;
LATCH=1;
}
void SendByte(unsigned char dat)
{
unsigned char y;
for(y=0;y<8;y++)
{
SRCLK=0;
if(dat&0x80) //與1000 0000 相與輸入數據
SDATA=1;
else
SDATA=0;
dat<<=1; //輸入段碼的下一個字的數據
SRCLK=1; //輸入上升沿觸發
}
}
void Send2Byte(unsigned char dat1,unsigned char dat2)//段選位選逐個發送
{
SendByte(dat1);
SendByte(dat2);
}
void show_led(void)
{
Send2Byte(BJTY_WeiMa[7],BJTY_DuanMa[mil2]);
LAT595();
Send2Byte(BJTY_WeiMa[6],BJTY_DuanMa[mil1]);
LAT595();
Send2Byte(BJTY_WeiMa[5],BJTY_DuanMa[sec2]);
LAT595();
Send2Byte(BJTY_WeiMa[4],BJTY_DuanMa[sec1]);
LAT595();
Send2Byte(BJTY_WeiMa[3],BJTY_DuanMa[min2]);
LAT595();
Send2Byte(BJTY_WeiMa[2],BJTY_DuanMa[min1]);
LAT595();
Send2Byte(BJTY_WeiMa[1],BJTY_DuanMa[hour2]);
LAT595();
Send2Byte(BJTY_WeiMa[0],BJTY_DuanMa[hour1]);
LAT595();
}
void main(void)
{
init();
delay1ms(1000);
while (1)
{
mil1=mil/10;
mil2=mil%10;
sec1=sec/10;
sec2=sec%10;
min1=min/10;
min2=min%10;
hour1=hour/10;
hour2=hour%10;
show_led();
}
}