要求

1、在LCD1602上显示数字

2、按下K1对数字加1，按下K2对数字减1

3、按下K3将数字存到AT24C02中，按下K4将数字从AT24C02中取出来并在LCD上显示

效果

资源

工程文件压缩包
链接：https://pan.baidu.com/s/1EdI2_KE5v8NaU3Wk89ipig
提取码：foi0

main函数

#include <REGX52.H>
#include <INTRINS.H>
#include "LCD1602.H"
#include "Delay.H"
#include "Key.H"
#include "AT24C02.H"

void main(){
	unsigned char KEY;
	unsigned int Num=0;
	LCD_Init();
	LCD_ShowNum(1,1,Num,5);
	while(1){
		// temp=AT24C02_ReadByte(1);
		KEY=key();
		if(KEY==1) Num++;
		if(KEY==2) Num--;
		if(KEY==3){
			AT24C02_WriteByte(0,Num%256);
			Delayms(5);						//写数据较慢，需要延时
			AT24C02_WriteByte(1,Num/256);
			Delayms(5);
			LCD_ShowString(2,1,"W OK");
			Delays(1);
			LCD_ShowString(2,1,"    ");
		}
		if(KEY==4){
			Num=AT24C02_ReadByte(0);		//读数据较快，不需要延时
			Num|=(AT24C02_ReadByte(1)<<8);
			LCD_ShowString(2,1,"R OK");
			Delays(1);
			LCD_ShowString(2,1,"    ");
		}
		LCD_ShowNum(1,1,Num,5);
	}
}