51单片机按键流水灯代码

以下是51单片机按键流水灯的代码，供您参考：

#include <reg52.h>

sbit LED1 = P1^0;
sbit LED2 = P1^1;
sbit LED3 = P1^2;
sbit LED4 = P1^3;

sbit KEY1 = P3^1;
sbit KEY2 = P3^0;

void delay(unsigned int xms);

void main()
{
    unsigned char i = 0;

    while(1)
    {
        if(KEY1 == 0)
        {
            delay(10);
            if(KEY1 == 0)
            {
                i++;
                if(i > 3)
                {
                    i = 0;
                }
            }
            while(KEY1 == 0);
        }

        if(KEY2 == 0)
        {
            delay(10);
            if(KEY2 == 0)
            {
                i--;
                if(i < 0)
                {
                    i = 3;
                }
            }
            while(KEY2 == 0);
        }

        switch(i)
        {
            case 0:
                LED1 = 1;
                LED2 = 0;
                LED3 = 0;
                LED4 = 0;
                break;
            case 1:
                LED1 = 0;
                LED2 = 1;
                LED3 = 0;
                LED4 = 0;
                break;
            case 2:
                LED1 = 0;
                LED2 = 0;
                LED3 = 1;
                LED4 = 0;
                break;
            case 3:
                LED1 = 0;
                LED2 = 0;
                LED3 = 0;
                LED4 = 1;
                break;
            default:
                LED1 = 0;
                LED2 = 0;
                LED3 = 0;
                LED4 = 0;
                break;
        }
    }
}

void delay(unsigned int xms)
{
    unsigned char i, j;
    for(i = xms; i > 0; i--)
    {
        for(j = 110; j > 0; j--);
    }
}

该代码使用了4个LED灯和2个按键，通过按键来控制LED的流水效果。按下KEY1则流水方向向右，按下KEY2则流水方向向左。您可以根据自己的需要进行修改。