1. 流水灯 效果，六个LED内嵌灯不停切换（位输出）

//流水灯
#include<reg52.h>

#define uint unsigned int 
#define no 0
#define off 1

sbit led1 = P1^0;
sbit led2 = P1^1;
sbit led3 = P1^2;
sbit led4 = P1^3;
sbit led5 = P1^4;
sbit led6 = P1^5;
sbit led7 = P1^6;
sbit led8 = P1^7;

void delay(uint xms){	//延时xms
	uint i,j;
	for(i = xms;i>0;i--){
		for(j = 112;j>0;j--);
	}
}
int main(){
 	while(1)
 	{
	 	led1 = no; //
		delay(200);//延迟200ms
		led1 = off;

		led2 = no; //
		delay(200);//延迟200ms
		led2 = off;

		led3 = no; //
		delay(200);//延迟200ms
		led3 = off;

		led4 = no; //
		delay(200);//延迟200ms
		led4 = off;

		led5 = no; //
		delay(200);//延迟200ms
		led5 = off;

		led6 = no; //
		delay(200);//延迟200ms
		led6 = off;

		led7 = no; //
		delay(200);//延迟200ms
		led7 = off;

		led8 = no; //
		delay(200);//延迟200ms
		led8 = off;
 	}
 	return 0;
 }

2. 流水灯 效果，六个LED内嵌灯不停切换（循环移位）

#include <reg52.h>
#include <intrins.h>

#define uint unsigned int
#define uchar unsigned char

uchar aa;

void delayms(uint);

int main() {
	aa = 0xfe;
	
	while(1){
		P1 = aa;
		delayms(500);
		aa = _cr ol_(aa,1);
	}
	return 0;
}

void delayms(uint xms){
 	uint i,j;
	for(i = xms;i > 0;i--){
		for(j = 110;j > 0;j--);
	}
}

3. 数码管显示内容

#include <reg52.h>

sbit dula = P2^6;	//申明U1锁存器的锁存端
sbit wela = P2^7;	//申明U2锁存器的锁存端

int main(){
	wela = 1;		 //打开U2锁存端
	P0 = 0xFE;	   	 //打开入位选信号
	wela = 0;		 //关闭U2锁存端

	dula = 1;
	P0 = 0x7F;
	dula = 0;
	while(1);

	return 0;
}

4. 数码管显示内容 （略有闪烁）

#include <reg52.h>

#define uchar unsigned char
#define uint unsigned int 

sbit dula = P2^6;
sbit wela = P2^7;

uchar num;
uchar code table[] = {
					 0x3f, 0x06, 0x5b, 0x4f,
					 0x66, 0x6f, 0x7d, 0x07,
					 0x7f, 0x6f, 0x77, 0x7c,
					 0x39, 0x5e, 0x79, 0x71
};

void delayms(uint);

int main(){
	wela = 1;
	P0 = 0xc0;
	wela = 0;
	while(1){
		for(num = 0; num < 16; num++){
			dula = 1;
			P0 = table[num];
			dula = 0;
			delayms(500);
		}
	}

	return 0;
}

void delayms(int xms){
	uint i,j;
	for(i = xms; i > 0; i--){
		for(j = 110; j < 0; j--);
	}
}

5. 数码管显示内容 （显示1 2 3 4）（略有问题，欢迎提出Bug）

#include <reg52.h>

#define uchar unsigned char
#define uint unsigned int 

sbit dula = P2^6;
sbit wela = P2^7;

uchar code table[] = {
					 0x3f, 0x06, 0x5b, 0x4f,
					 0x66, 0x6f, 0x7d, 0x07,
					 0x7f, 0x6f, 0x77, 0x7c,
					 0x39, 0x5e, 0x79, 0x71
};

void delayms(uint);


void main(){

	while(1){
		dula = 1;
		P0 = table[1];  //送段选数据
		dula = 0;
		P0 = 0xff;	    //送位选数据前关闭所有显示，防止打开位选锁存时
		wela = 1;		//原来段选数据通过位选锁存器造成的混乱
		P0 = 0xfe;		//送位选数据
		wela = 0;
		delayms(10);

		dula = 1;
		P0 = table[2];  
		dula = 0;
		P0 = 0xff;	    
		wela = 1;		
		P0 = 0xfd;		
		wela = 0;
		delayms(10);

		dula = 1;
		P0 = table[3];  
		dula = 0;
		P0 = 0xff;	    
		wela = 1;		
		P0 = 0xfb;		
		wela = 0;
		delayms(10);

		dula = 1;
		P0 = table[4];  
		dula = 0;
		P0 = 0xff;	    
		wela = 1; 		
		P0 = 0xf7;		
		wela = 0;
		delayms(10);


	}

}

void delayms(uint xms){
	uint i,j;
	for(i = xms; i > 0; i--){
		for(j = 110; j < 0; j--);
	}
} 

6. 蜂鸣器间断报警

 #include <reg52.h>

#define on 0
#define off 1

sbit fm = P2^3;

void delay(unsigned int xms){
	unsigned int i,j;
	for(i = xms; i > 0; i--){
		for(j = 112;j > 0; j--);
	}

}

int main(){

	while(1){
		fm = on;
		delay(100);
		fm = off;
		delay(100);

	}
	return 0;
}

7. 蜂鸣器报警，流水灯切换

 #include <reg52.h>
#include <intrins.h>

#define on 0
#define off 1

sbit fm = P2^3;

void delay(unsigned int xms){
	unsigned int i,j;
	for(i = xms; i > 0; i--){
		for(j = 112;j > 0; j--);
	}

}

int main(){
	P1 = 0xfe;
	while(1){
		delay(100);
		P1 = _crol_(P1,1);
		fm = on;
		delay(100);
		fm = off;
	}
	
	return 0;
}

8. 显示器显示 “b”

#include <reg52.h>

#define duan P0
#define duan_one P1

sbit wei1 = P2^4; //定义第一个显示屏
sbit wei2 = P2^5;
sbit wei3 = P2^6;
sbit wei4 = P2^7;

int main(){

	wei1 = 1;	
	wei2 = 1;
	wei3 = 0;
	wei4 = 0;
	duan = 0x7c;//0111 1100 "b"
	duan_one = 0x7c;//0111 1100 "b"
	while(1);

	return 0;
}

9. 显示屏流动切换1 2 3 4，彩灯流动 ，蜂鸣器间断

#include <reg52.h>
#include <intrins.h>

#define duan P0
#define uchar unsigned char
#define on 0
#define off 1

sbit wei1 = P2^4; //定义第一个显示屏
sbit wei2 = P2^5;
sbit wei3 = P2^6;
sbit wei4 = P2^7;
sbit fm = P2^3;
uchar code se[17] = {
				0x3f, 0x06, 0x5b, 0x4f, 
				0x66, 0x6d, 0x7d, 0x07, 
				0x7f, 0x6f, 0x77, 0x7c,
				0x39, 0x5e, 0x79, 0x71, 
				0x00
};

void delay(unsigned int xms){
	unsigned int i,j;
	for(i = xms; i > 0; i--){
		for(j = 112;j > 0; j--);
	}

}

void main(){
	P1 = 0xfe;
	while(1){
	  	duan = se[4];
		wei1 = 0;	
		wei2 = 0;
		wei3 = 0;
		wei4 = 1;
		P1 = _crol_(P1,1); 
		fm = on;
		delay(200); 
		fm = off;
		delay(800);		
	
		duan = se[3];
		wei1 = 0;	
		wei2 = 0;
		wei3 = 1;
		wei4 = 0;
		P1 = _crol_(P1,1);  
		fm = on;
		delay(200); 
		fm = off;
		delay(800);	
		
		duan = se[2];
		wei1 = 0;	
		wei2 = 1;
		wei3 = 0;
		wei4 = 0;
		P1 = _crol_(P1,1);   
		fm = on;
		delay(200); 
		fm = off;
		delay(800);			
	
		duan = se[1];
		wei1 = 1;	
		wei2 = 0;
		wei3 = 0;
		wei4 = 0; 
		P1 = _crol_(P1,1);	
		fm = on;
		delay(200); 
		fm = off;
		delay(800);			
	}	
}

10. 多功能控制实验程序

#include <reg52.h>

sbit led1 = P1^0;//RED
sbit led2 = P1^1;//RED
sbit led3 = P1^2;//GREEN
sbit led4 = P1^3;//GREEN
sbit led5 = P1^4;//YELLOW
sbit led6 = P1^5;//YELLOW
sbit led7 = P1^6;//BLUE
sbit led8 = P1^7;//BLUE

sbit k1 = P3^4;
sbit k2 = P3^5;
sbit k3 = P3^6;
sbit k4 = P3^7;

void main(){
	P1 = 0xfe;

	while(1){
		led1 = k1;
		led2 = k1;

		if(k1 == 0){
			led1 = 0;
			led2 = 0;
		}
		else{
			led1 = 1;
			led2 = 1;
		}
		led3 = k2;
		led4 = k2;
		led5 = k3;
		led6 = k3;
		led7 = k4;
		led8 = k4;
	}
}

11. 单按键控制实验，点击关闭熄灭灯或点亮，长按无操作

#include  <reg52.h>

sbit led1 = P1^0l;
sbit k1 = P3^4;

void delay(unsigned int xms){
	unsigned int i,j;
	for(i = xms; i > 0; i--){
		for(j = 112;j > 0; j--);
	}
}

void main()	{
	P1 = 0xfe;//熄灭所有led
	
	while(1) {
		if(k1 == 0){
			delay(10);//消抖
			if(k1 == 0){
				//再次判断是否按下
				 while(k1 == 0);//直到按钮判断松开
				 led1 =~led1;	//翻转	
			}
		}
	}
}

下面位断点 需要连接第三方硬件

12. 中断 - 外部中断实验 注：此实验需要杜邦线将单片机P3.2引脚与最下角端口链接

#include <reg52.h>

void delay(unsigned int xms){
	unsigned int i,j;
	for(i = xms; i > 0; i--){
		for(j = 112;j > 0; j--);
	}
}

void main(){
	P1 = 0x0f;//0000 1111 下面四个灯亮，上面灭
	EX0 = 1; //INT0中断允许
	EA  = 1;//全局中断打开
	IT0	= 0;//触发模式为低电平触发
	while(1);
}

void low()interrupt 0{
	P1 =~ P1;
	delay(200);
}

12. 外部中断下沿触发实验 注： 此实验需要杜邦线将单片机P3.3与P3.6引脚端口链接

#include <reg52.h>

void main(){
	P1 = 0x0f;//0000 1111 下面四个灯亮，上面灭
	EX0 = 1; //INT0中断允许
	EA  = 1;//全局中断打开
	IT0	= 1;//触发模式为下电平触发
	while(1);
}

void low()interrupt 2{
	P1 =~ P1;