[嵌入式]基于51单片机《按键控制流水灯》

1.用4个LED灯发光二极管实现至少四种灯光效果

2.可以通过输入按键在几种灯光之间切换

3.可以通过暂停按键停止彩色灯光效果，使小灯全亮，再次按下按键后继续之前的效果

4.增加自动在几种效果间切换功能

原理图很简单，正常的最小系统，加上你需要的LED灯和按键，分别定义他们的引脚就可以了，最后把对应引脚改进程序就搞定。

#include"reg52.h"
#include"intrins.h"

 #define uchar unsigned char
#define uint unsigned int
#define LED P0

sbit KEY0=P2^0;
sbit KEY1=P2^1;
sbit KEY2=P2^2;

unsigned char code led_1[4]={0xfe,0xfd,0xfb,0xf7};//,0xef,0xdf,0xbf,0x7f};//定义第一种流水灯状态
unsigned char code led_2[4]={0xf7,0xfb,0xfd,0xfe};//0x7f,0xbf,0xdf,0xef};//,0xf7,0xfb,0xfd,0xfe};//定义第二种流水灯状态
unsigned char code led_3[4]={0xfe,0xf7,0xfd,0xfb};//,0xff};//定义第三种流水灯状态
unsigned char code led_4[4]={0xfd,0xfe,0xfb,0xf7};//,0xff};//定义第四种流水灯状态
unsigned char code led_5[8]={0xfe,0xfd,0xfb,0xf7,0xf7,0xfb,0xfd,0xfe};//,0xff};//定义第五种流水灯状态
unsigned char code led_6[16]={0xfe,0xfd,0xfb,0xf7,0xf7,0xfb,0xfd,0xfe,0xfe,0xf7,0xfd,0xfb,0xfd,0xfe,0xfb,0xf7};
unsigned char code led_8[4]={0xff,0xff,0xff,0xff};

unsigned int k,z,d;   //定义四个无符号整型变量

void delayms(uint ms)  //延时
{
	uint i,j;
	for(i=ms ; i>0 ; i--)
	for(j=110 ; j>0 ; j--);
}
void key0()
{
  if(KEY0 == 0)
	{
		delayms(10);
		if(KEY0== 0)
		{
		  k++;
			delayms(10);
			if(k>5)
			k = 1;
		}
	}
}
void key1()
{
  if(KEY1 == 0)
	{  
		delayms(10);
		if(KEY1 == 0)
		{
		  d++;
			delayms(10);
			if(d>2)
			d = 1;
		}
	}
} 
void main()
{
	uchar mode=0;
  uchar key_flag=0; 
  while(!key_flag)
  {
    if(!KEY0)
    {
       _nop_();
      if(!KEY0)
      {
        key_flag=1;
        mode=1;
				key0();
        while(!KEY0);
      }
    }
     if(!KEY1)
    {
       _nop_();//单周期指令，对于一个12M的晶体振荡器，延迟时间是1uS
      if(!KEY1)
      {
        key_flag=1;
        mode=2;
        key1();
        while(!KEY1);
  }
}
  if(!KEY2)
    {
       _nop_();
      if(!KEY2)
      {
        key_flag=1;
        mode=3;
        while(!KEY2);
        }
     }
  }
  if (mode == 1)//按键1控制流水灯	
	{
	k = 1;    //初始化为开机第一种流水灯状态
	while(1)
	{
		switch(k)
		{
			case 1:   //第一种流水灯状态
				for(z=0 ; z<4 ; z++)
				{
					LED = led_1[z];
					delayms(500);
					key0();
					if(KEY0 == 0)
					break;
				}
				delayms(500);
				break;
			case 2:   //第二种流水灯状态
				for(z=0 ; z<4 ; z++)
				{
					LED = led_2[z];
					delayms(500);
					key0();
					if(KEY0 == 0)
					break;
				}
				delayms(500);
				break;    
			case 3:   //第三种流水灯状态
				for(z=0 ; z<4 ; z++)
				{
					LED = led_3[z];
					delayms(500);
					key0();
					if(KEY0 == 0)
					break;
				}
				delayms(500);
				break;
			case 4:   //第四种流水灯状态
				for(z=0 ; z<4 ; z++)
				{
					LED = led_4[z];
					delayms(500);
					key0();
					if(KEY0 == 0)
					break;
				}
				delayms(500);
				break;
				case 5:   //第四种流水灯状态
				for(z=0 ; z<8 ; z++)
				{
					LED = led_5[z];
					delayms(500);
					key0();
					if(KEY0 == 0)
					break;
				}
				delayms(500);
				break;
	  }
  }
 }
	else if (mode == 2)//按键2控制流水灯
	{
		d = 1;
		while(1)
		{
		switch(d)
		{
		case 1:
    for(z=0 ; z<4 ; z++)
    {
			LED = 0xf0;
      delayms(500);
			key1();
			if(KEY1 == 0)
			break;
	}
		  break;
	  case 2:
			for(z=0 ;z <4 ; z++)
    { 
			LED = led_1[z];
      delayms(500);
			key1();
			if(KEY1 == 0)
			break;
	}
		delayms(500);
		  break;
      }	
   }
}
	else if (mode == 3)//按键3控制流水灯
	{
		while(1)
		{
		for(z=0 ; z<16 ; z++)
    {
      LED = led_6[z];
      delayms(500);
			if(KEY2 == 0)
			break;
		  }
	  }
	}
}