51 单片机 led 灯光操作

led流水灯

#include 
#include "INTRINS.H"

void Delay(unsigned int xms)		
{
	unsigned char i, j;
	while(xms--){
			_nop_();
			i = 2;
			j = 199;
			do
			{
				while (--j);
			} while (--i);
	}


}

void main(){
	while(1){
		P2=0xFE;
		Delay(500);
			P2=0xFD;
		Delay(500);
			P2=0xFB;
		Delay(500);
		P2=0xF7;
		Delay(500);
			P2=0xEF;
		Delay(500);
			P2=0xDF;
		Delay(500);	
			P2=0xBF;
		Delay(500);
			P2=0x7F;
		Delay(500);
	}

}
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延时代码

#include "INTRINS.H"

void Delay(unsigned int xms)		
{
	unsigned char i, j;
	while(xms--){
			_nop_();
			i = 2;
			j = 199;
			do
			{
				while (--j);
			} while (--i);
	}


}
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独立按键控制led(松发式)

#include 

void main(){


	while(1){
	
		if(P3_1==0)
			P2_0=0;
		else
			P2=0xFF;
		if(P3_0==0)
			P2=0xFD;
		else
			P2=0xFF;
		if(P3_2==0)
			P2=0xFB;
		else
			P2=0xFF;
		if(P3_3==0)
			P2=0xF7;
		else
			P2=0xFF;
	}

}
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独立按键控制led 按键去除抖动

#include 


void Delay(unsigned int xms)		
{
	unsigned char i, j;
	while(xms--){
			i = 2;
			j = 199;
			do
			{
				while (--j);
			} while (--i);
	}


}

void main(){


	while(1){
	
		if(P3_1==0){
			Delay(20);
			while(P3_1==0);
			Delay(20);
			P2_0=~P2_0;
		}

	
	}

}
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独立按键 led二进制

#include 


void Delay(unsigned int xms)		
{
	unsigned char i, j;
	while(xms--){
			i = 2;
			j = 199;
			do
			{
				while (--j);
			} while (--i);
	}


}

void main(){
	unsigned char x=0;

	while(1){
	
		if(P3_1==0){
			Delay(20);
			while(P3_1==0);
			Delay(20);
			
			x++;
			P2=~x;
		}

	
	}

}
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独立按键控制led移位

#include 


void Delay(unsigned int xms)		
{
	unsigned char i, j;
	while(xms--){
			i = 2;
			j = 199;
			do
			{
				while (--j);
			} while (--i);
	}


}

void main(){
	unsigned char x=0;
	P2_0=0;
	while(1){
	
		if(P3_0==0){
			Delay(20);
			while(P3_0==0);
			Delay(20);
			
			x++;
			x=x%8;
		
			P2=~(0x01<<x);
		}
		if(P3_1==0){
			Delay(20);
			while(P3_1==0);
			Delay(20);
			
		
			if(x==0)
				x=7;
			else
				x--;
		
			P2=~(0x01<<x);
		}
	
	}

}
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