基于51单片机的各种花样的流水灯c51程序

/*-----------------------------------------------
功能：流水灯对称移动闪烁（双闪烁）

------------------------------------------------*/

#include
#define uint unsigned int
void delay(uint);
main()
{
        uint comp1=0xfe;
        uint comp2=0x80;
        P1=0x7e;
        delay(30000);
        while(1)
        {
                P1=0xff;
                comp1<<=1;
                comp1|=0x01;
                comp2>>=1;
                P1&=comp1;
                P1^=comp2;
                delay(30000);
                if(P1==0xe7)
                {
                        comp1<<=1;
                        comp1|=0x01;
                        comp2>>=1;          
                }      

                if(comp1==0x7f)
                {
                        comp1=0xfe;
                        comp2=0x80;             
                }     
        }              
}
void delay(uint cnt)
{
     while(cnt--);    
}

/*-----------------------------------------------------------------

只循环一次，而没有一直循环下去，出错地方在：

通过添加一条测试语句：

                                                 if(comp1==0x7f)
                                                 {
                                                         comp1=0xfe;  comp2=0x80;
                                                         P1=0x00;  delay(30000);

                                                 }     

发现if语句没有被执行，自然继续左右移动：

1111 1111&1111 1111^0000 0000==11111 1111

所以看起来是执行了一次while中的代码。

具体为什么不行，还不清楚……   

更正下列代码后，能够实现功能。                                                    

                                                 if(P1==0x7e)
                                                 {
                                                         comp1=0xfe;
                                                         comp2=0x80;
                                                 }

或者：                                    

                                                 if(comp2==0x01)
                                                 {
                                                         comp1=0xfe;
                                                         comp2=0x80;
                                                 }

--------------------------------------------------------------*/[page]

*********************************************

/*-----------------------------------------------
功能：流水灯（单向单闪烁）

------------------------------------------------*/

#include
#define uint unsigned int
void delay(uint);
main()
{
        //uint fre=0x03;
        //uint comp1=0xfe,comp2=0x80;
        P1=0xfe;
        while(1)
        {
        /*------------------------------------------------------------------

                    模块1：循环单向闪烁，只有一个灯亮灭
            执行3次，转入下一种闪烁

        --------------------------------------------------------------------*/
                while(1)
                {
                        delay(30000);
                        P1<<=1;
                        P1|=0x01;
                        if(P1=0x7f)
                        {
                                delay(30000);       
                                P1=0xfe;

                        }
                }
                        
        }       
}
void delay(uint cnt){while(cnt--);}

/*-----------------------------------------

程序运行结果左右两端跳动，原因是：

if(P1=0x7f);中的等号也成了赋值号，更正为if(P1==0x7f);

特别注意，不要把判断语句种的等号误写为赋值号。

-----------------------------------------*/

[page]

**************************************

/*-----------------------------------------------
功能：花样灯（单向单闪烁+单向双闪烁）

------------------------------------------------*/

#include
#define uint unsigned int
void delay(uint);
main()
{
        uint fre=0x04;
        uint comp1=0xfe,comp2=0x80;
        while(1)
        {
                /*-------------------------------------------------------------------

                            模块1：循环单向闪烁，只有一个灯亮灭
                                        执行3次，转入下一种闪烁

                --------------------------------------------------------------------*/
                P1=0xfe;
                while(1!=fre--)
                {
                        delay(30000);
                        P1<<=1;
                        P1|=0x01;
                        if(P1==0x7f)
                        {
                                delay(30000);       
                                P1=0xfe;

                        }
                }
                /*-------------------------------------------------------------------

                          模块2：循环单向闪烁，只有两个灯亮或者灭
                                          执行3次，转入下一种闪烁

                --------------------------------------------------------------------*/
                P1=0xfc;
                while(3!=fre++)
                {
                        delay(30000);
                        P1<<=2;
                        P1|=0x03;
                        if(P1==0x3f)
                        {
                                delay(30000);
                                P1=0xfc;
                        }
                }       
        }       
}
void delay(uint cnt)
{
  while(cnt--);
}

/*----------------------------------------------------

两个模块均没有问题，但是放在一起，并没有得到想要的结果，

第一个循环没有进行完全，且两个循环的循环的次数与要求的不符。

错误地方在于：模块1和模块2的循环控制的只是一次亮灭，更正为：

#include
#define uint unsigned int
void delay(uint);
main()
{
        uint fre=0x04;
        uint fre1,fre2;
        uint comp1=0xfe,comp2=0x80;
        while(1)
        {
                /*--------------------------------------------------------------------

                            模块1：循环单向闪烁，只有一个灯亮灭
                                        执行3次，转入下一种闪烁

               --------------------------------------------------------------------------*/
            P1=0xfe;
                while(1!=fre--)
                {
                        fre1=0x08;
                        while(1!=fre1--)
                        {
                                delay(3000000);
                                P1<<=1;
                                P1|=0x01;
                                if(P1==0x7f)
                                {
                                        delay(3000000);       
                                        P1=0xfe;
                                }
                        }
                }
                /*-------------------------------------------------------------------

                            模块2：循环单向闪烁，只有两个灯亮或者灭
                                          执行3次，转入下一种闪烁               

                --------------------------------------------------------------------*/
                P1=0xfc;
                while(3!=fre++)
                {
                        fre2=0x04;
                        while(1!=fre2--)
                        {
                                delay(3000000);
                                P1<<=2;
                                P1|=0x03;
                                if(P1==0x3f)
                                {
                                        delay(3000000);
                                        P1=0xfc;
                                }
                        }          
                }
        }       
}
void delay(uint cnt)
{
  while(cnt--);
}

注意控制语句中fre++和fre--；并且fre1和fre2的初始化不能出错，

由于if()语句的出现，fre1和fre2的取值要比预想的减一。

----------------------------------------------------------*/