流水灯代码实现

//流水灯左移
//其中调用math.h文件中的pow函数
 
#include <reg52.h>
#include <math.h>

sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;

sbit ENLED = P1 ^ 4;

int main(void)
{
	int count;

   	ENLED = 0; 
    ADDR3 = 1; 
    
	ADDR2 = 1; 
    ADDR1 = 1; 
    ADDR0 = 0; 
    
	count = 0;
	while (1)
	{
		int j;

		float fl;
		int m;

		if (8 == count)
			count = 0;

		fl = pow(2, count);
		m = fl;
		P0 = 0xFF ^ m;

		for (j = 0; j < 9000; j++)
			;

		count++;
	}
}	  

//流水灯左移

#include <reg52.h>

sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;

sbit ENLED = P1 ^ 4;

/*
@func：求取2的m次幂
@ret：返回2的m次幂的整型值
*/
int POW(int m)
{
	int i;
	int iRet;
	iRet = 1;
	for (i = 0; i < m; i++)
	iRet = iRet * 2;
	return iRet;		
}  

int main(void)
{
	int count;

   	ENLED = 0; 
    ADDR3 = 1; 
    
	ADDR2 = 1; 
    ADDR1 = 1; 
    ADDR0 = 0; 
		
	count = 0;
	while (1)
	{
		int j;

		if (8 == count)
			count = 0;

		P0 = 0xFF ^ POW(count);
		for (j = 0; j < 9000; j++)
			;

		count++;
	}
}	

//流水灯右移

#include <reg52.h>

sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;

sbit ENLED = P1 ^ 4;

int POW(int m)
{
	int i;
	int iRet;
	iRet = 1;
	for (i = 0; i < m; i++)
	iRet = iRet * 2;
	return iRet;		
}  

int main(void)
{
	int count;

   	ENLED = 0; 
    ADDR3 = 1; 
    
	ADDR2 = 1; 
    ADDR1 = 1; 
    ADDR0 = 0; 
		
	count = 7;
	while (1)
	{
		int j;

		P0 = 0xFF ^ POW(count);
		for (j = 0; j < 9000; j++)
			;

		if (0 == count)
			count = 8;
        
		count--;
	}
}	

//流水灯左移到头接着右移，右移到头再左移

#include <reg52.h>

sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;

sbit ENLED = P1 ^ 4;

int POW(int m)
{
	int i;
	int iRet;
	iRet = 1;
	for (i = 0; i < m; i++)
	iRet = iRet * 2;
	return iRet;		
}  

int main(void)
{
	int count;
	int iflag; //iflag = 0时，从右向左，iflag = 1时，从左向右

   	ENLED = 0; 
    ADDR3 = 1; 
    
	ADDR2 = 1; 
    ADDR1 = 1; 
    ADDR0 = 0; 
		
	count = 0;
	iflag = 0;
	while (1)
	{
		int j;

		if (0 == iflag)
		{
			if (8 == count)//最后一个灯点亮后，开始点亮倒数第二个灯
			{
				count = 6;
				iflag = 1;
			}
		}
		else
		{
			if (0 == count)//第一个灯此时未点亮，故只改变方向后进行第一个灯的点亮
				iflag = 0;
		}

		P0 = 0xFF ^ POW(count);
		for (j = 0; j < 9000; j++)
			;
		
		if (0 == iflag)
			count++;
		else
			count--;
	}
}	

//流水灯右移到头接着左移，左移到头再右移

#include <reg52.h>

sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;

sbit ENLED = P1 ^ 4;

int POW(int m)
{
	int i;
	int iRet;
	iRet = 1;
	for (i = 0; i < m; i++)
	iRet = iRet * 2;
	return iRet;		
}  

int main(void)
{
	int count;
	int iflag; //iflag = 0时，从右向左，iflag = 1时，从左向右

   	ENLED = 0; 
    ADDR3 = 1; 
    
	ADDR2 = 1; 
    ADDR1 = 1; 
    ADDR0 = 0; 
		
	count = 7;
	iflag = 1;
	while (1)
	{
		int j;

		if (0 == iflag)
		{
			if (8 == count)//最后一个灯点亮后，开始点亮倒数第二个灯
			{
				count = 6;
				iflag = 1;
			}
		}
		else
		{
			if (0 == count)//第一个灯此时未点亮，故只改变方向后进行第一个灯的点亮
				iflag = 0;
		}

		P0 = 0xFF ^ POW(count);
		for (j = 0; j < 9000; j++)
			;
		
		if (0 == iflag)
			count++;
		else
			count--;
	}
}