《单片机实践项目》之《电子DIY》之基于51单片机的60秒倒计时设计
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2022-03-02 10:12:00
程序#include "reg51.h"//视频讲解:B站搜索:“逗比小憨憨”#define LED_PORT P0#define uchar unsigned char#define uint unsigned intsbit dula=P2^0;sbit wela=P2^1;sbit LED1=P1^0;sbit LED2=P1^1;sbit START=P3^2;sbit STOP=P3^3;uchar counter=0;uchar displ...
程序
#include "reg51.h"
//视频讲解:B站搜索:“逗比小憨憨”
#define LED_PORT P0
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^0;
sbit wela=P2^1;
sbit LED1=P1^0;
sbit LED2=P1^1;
sbit START=P3^2;
sbit STOP=P3^3;
uchar counter=0;
uchar display_value=0;
uchar START_STOP_Flag=0;
uchar code dis[16]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay_ms(uint a);
void display(uchar i,uchar j);
void delay_ms(uint a)
{
uint i=0,j=0;
for(i=0;i<a;i++)
for(j=0;j<118;j++);// 1ms
}
void display(uchar i,uchar j)
{
dula=wela=0;
LED_PORT=0X00;
dula=1;
LED_PORT=dis[i];
dula=0;
LED_PORT=0XFF;
wela=1;
LED_PORT=0xfe;
wela=0;
delay_ms(5);
LED_PORT=0X00;
dula=1;
LED_PORT=dis[j];
dula=0;
LED_PORT=0Xff;
wela=1;
LED_PORT=0xfd;
wela=0;
delay_ms(5);
}
void Init(void)
{
LED1=0;
LED2=1;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
ET0=1;
IT0=1;
IT1=1;
EX0=1;
EX1=1;
PX0=1;
PX1=1;
EA=1;
}
int main(void)
{
uchar cnt=60;
Init();
while(1)
{
if(START_STOP_Flag==1)
{
if(counter==20)//50*20=1S
{
counter=0;
LED1=!LED1;
LED2=!LED2;
display_value++;//1
cnt=60-display_value; //59
if(display_value==60)
{
display_value=0; //若到了60s,则归零
}
}
display(cnt/10,cnt%10); //显示
}
else
{
display(6,6); //显示
}
}
return 0;
}
void Timer0(void) interrupt 1 using 0
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
counter++;
}
void Int0(void)interrupt 0 using 0
{
START_STOP_Flag=1;
TR0=1;
}
void Int1(void)interrupt 2 using 1
{
START_STOP_Flag=0;
TR0=0;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
counter=0;
}
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