Single chip electronic stopwatch clock digital tube display-EEWORLD

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Electronic stopwatch clock digital tube display can set time can be used to stopwatch pause, reset buzzer button tone

The microcontroller source program is as follows:

#include

#include "delay.h"

#include "intrins.h"

unsigned char code LED[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; //Define the common cathode LED 7-segment display code

unsigned char dispbit[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; //Define the digital tube bit code

unsigned char hour=23,min=58,sec=52,week=1; //Define the initial time as 23 hours, 58 minutes and 52 seconds

unsigned char tcount; //define 50ms counting variable

unsigned char flag=0;

sbit KEY1=P1^0;

sbit KEY2=P1^1;

sbit KEY3=P1^2;

sbit key1=P1^3;

sbit key2=P3^6;

sbit key3=P3^7;

sbit LED1=P1^7;

sbit LED2=P1^6;

sbit LED3=P1^5;

sbit LED4=P1^4;

sbit BEEP=P3^0;

void display(unsigned char,unsigned char,unsigned char,unsigned char);

void delay(unsigned int time)//define delay function

{

unsigned int j = 0;

for(;time>0;time--)

for(j=0;j<125;j++);

}

void Delay100us() //@11.0592MHz

{

unsigned char i, j;

_nop_();

i = 2;

j = 100;

{

while (--j);

} while (--i);

}

void main(void)

{

TMOD=0x01; //Timer/Counter 0 is set to mode 1

TH0=(65536-50000)/256; //The high eight bits of the initial value of the timing 50ms are sent to TH0

TL0=(65536-50000)%256; //The lower eight bits of the initial value of the timing 50ms are sent to TL0

EA=1; //Open CPU interrupt

ET0=1; //Open the interrupt of timer/counter 0

TR0=1; //Start timer 0

while(1)

{

if(key1==0)

{ BEEP=0;Delay100us();BEEP=1;

hour=0;min=0;sec=0;

}

if(key2==0)

{ BEEP=0;Delay100us();BEEP=1;

TR0=0;

}

if(key3==0)

{ BEEP=0;Delay100us();BEEP=1;

TR0=1;

}

if(KEY1==0)

{ delay(180);

if(KEY1==0)

{

TR0=0;

flag++;

if(flag>4)

{

flag=0;

TR0=1;

LED1=1;LED2=1;LED3=1;LED4=1;

}

switch(flag)

{

case 1: LED1=0;LED2=1;LED3=1;LED4=1;

if(KEY2==0)

{

delay(180);

if(KEY2==0)

{

hour++;

if(hour>23)

hour=0;

}

if(KEY3==0)

{

delay(150);

if(KEY3==0)

{

hour--;

if(hour<0)

hour=23;

}

display(hour,min,sec,week);

break;

case 2: LED1=1;LED2=0;LED3=1;LED4=1;

if(KEY2==0)

{

delay(180);

if(KEY2==0)

{

min++;

if(min>59)

min=0;

}

if(KEY3==0)

{

delay(180);

if(KEY3==0)

{

min--;

if(min<0)

min=59;

}

display(hour,min,sec,week);

break;

case 3: LED1=1;LED2=1;LED3=0;LED4=1;

if(KEY2==0)

{

delay(180);

if(KEY2==0)

{

sec++;

if(sec>59)

sec=0;

}

if(KEY3==0)

{

delay(180);

if(KEY3==0)

{

sec--;

if(sec<0)

sec=59;

}

display(hour,min,sec,week);

break;

case 4:LED1=1;LED2=1;LED3=1;LED4=0;

if(KEY2==0)

{

delay(180);

if(KEY2==0)

{

week++;

if(week>7)

week=1;

}

if(KEY3==0)

{

delay(180);

if(KEY3==0)

{

week--;

if(week<1)

week=7;

}

display(hour,min,sec,week);

break;

case 5:LED1=1;LED2=1;LED3=1;LED4=1;flag=0;TR0=1;

default:break;

}

display(hour,min,sec,week);

}

void display(unsigned char hour,unsigned char min,unsigned char sec,unsigned char week)

{

P0=LED[hour/10]; //The tens digit of the hour is sent to the digital tube for display

P2=0xfe;

delay(1);

P2=0xff;

P0=LED[hour%10]; //The unit digit of the hour is sent to the 2-digit digital tube for display

P2=0xfd;

delay(1);

P2=0xff;

P0=LED[min/10]; //The horizontal bar sends the digital tube to 3-digit display

P2=0xfb;

delay(1);

P2=0xff;

P0=LED[min%10]; //The tens digit of the minute is sent to the 4-digit digital tube for display

P2=0xf7;

delay(1);

P2=0xff;

P0=LED[sec/10]; //The units digit of the minute is sent to the 5-digit digital tube for display

P2=0xef;

delay(1);

P2=0xff;

P0=LED[sec%10]; //The horizontal bar sends the digital tube to 6-digit display

P2=0xdf;

delay(1);

P2=0xff;

P0=LED[10]; //The tens digit of the second is sent to the 7-digit digital tube for display

P2=0xbf;

delay(1);

P2=0xff;

P0=LED[week]; //The units digit of the second is sent to the 8-bit digital tube for display

P2=0x7f;

delay(1);

P2=0xff;

}

void T0_time() interrupt 1 //Timer interrupt processing function

{

TH0=(65536-50000)/256; //Resend the high 8 bits of the initial value of 50ms to TH0

TL0=(65536-50000)%256; //Resend the lower eight bits of the initial value of the timing 50ms to TH0

tcount++; //When the 50ms time is up, add 1

if(tcount==20) //Judge whether it is 1s

{

tcount=0; //After 1s, the variable is cleared to 0

sec++; //The second count variable is increased by 1

if(sec==60) //Judge whether the second has reached 60

{

sec=0; //When it reaches 60, the second variable is cleared to 0

……………………

Reference address：Single chip electronic stopwatch clock digital tube display

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