219 [Complete Course Design] Design of Intelligent Circuit Breaker Time Detection Based on 51 Single Chip Computer

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https://docs.qq.com/doc/DTlRSd01BZXNpRUxl

51 Intelligent Circuit Breaker Time Detection Design-KEY-LCD1602

This design is composed of STC89C52 single-chip circuit + LCD1602 liquid crystal display circuit + button circuit + power supply circuit.

1. The LCD displays the time difference between the first switch press and the second press in real time. 

#include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义
#include<stdio.h>
#include "1602.h"
#include "delay.h"

unsigned long time_20ms=0;		   //定时器计数

sbit key1 = P2^0;
sbit key2 = P2^1;

char dis0[16];		   //显示更新暂存
bit disFlag = 0 ;//定时更新显示

unsigned long timeCount = 0;//计数
unsigned char startFlag = 0;//启动标志 

void Init_Timer0(void);		 //函数声明

void main (void)
{                  
	Init_Timer0();        //定时器0初始化
	LCD_Init();           //初始化液晶
	DelayMs(20);          //延时有助于稳定
	LCD_Clear();          //清屏

	
	while (1)         //主循环
	{
		if(key1 == 0)//按键触发 上端
		{
		 	timeCount = 0;
			startFlag = 1;
		}