单片机抢答器

最新推荐文章于 2023-09-23 14:42:53 发布

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最新推荐文章于 2023-09-23 14:42:53 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/Jijiahao95/article/details/54615057

本文介绍了一个基于51单片机的LED显示程序实现细节，通过按键切换来显示不同的数字。代码中使用了定时延时函数实现LED的逐个点亮，并通过P1口读取外部按键的状态来改变P0口上LED的显示。

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#include <reg52.h>

unsigned int LED[16] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
void Delay(unsigned int c); 

void gewei(void);
void dulijianpan(void);

void main(void)
{
    /*int temp;
    temp = 0xfe;
    while(1)
    {
        while(P0 != 0x80)
        {
            P0 = ~temp;
            temp <<= 1;
            Delay(100);
        }
        temp = 0xfe;
        P0 = 0x01;
        Delay(100);
        P0 = 0x92;
    } */
    //gewei();
    unsigned char flag;
    flag = 0;
    P0 = 0xff;
    P1 = 0xff;

    while(1)
    {
        switch(P1)
        {
            case 0xfe:P0 = 0xff;flag = 1;break;
            case 0xfd:
            if(flag == 1)
                {
                P0 = LED[1];
                flag = 0;
                }
                break;
            case 0xfb:
            if(flag == 1)
                {
                P0 = LED[2];
                flag = 0;
                }
                break;
            case 0xf7:
            if(flag == 1)
                {
                P0 = LED[3];
                flag = 0;
                }
                break;
            case 0xef:
            if(flag == 1)
                {
                P0 = LED[4];
                flag = 0;
                }
                break;
            case 0xdf:
            if(flag == 1)
                {
                P0 = LED[5];
                flag = 0;
                }
                break;
            case 0xbf:
            if(flag == 1)
                {
                P0 = LED[6];
                flag = 0;
                }
                break;
            case 0x7f:
            if(flag == 1)
                {
                P0 = LED[7];
                flag = 0;
                }
                break;
        }
    }


}

void Delay(unsigned int c)
{
    int i,j;
    for(i = 0;i < c;i++)
    {
        for(j = 0;j < c;j++);
    }
}

void gewei(void)
{
    unsigned int i;
    unsigned int a[16] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
    while(1)
    {
         for(i = 0;i <16;i++)
         {
             P0 = a[i];
             Delay(300);
         }
    }
}