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各种花样的流水灯c51程序

发布时间:2020-06-11 发布时间:
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/*-----------------------------------------------
功能:流水灯对称移动闪烁(双闪烁)

作者:fei yu

日期:2010-6-14

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

#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;
                                                 }

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



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

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

作者:fei yu

日期:2010-6-14

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

#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。

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



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



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

作者:fei yu

日期:2010-6-14

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

#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。

----------------------------------------------------------*/
关键字:流水灯  c51程序 

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