单片机==独立按键之抢答器

深藏阁楼爱情的钟 2022-06-17 11:18 216阅读 0赞

用单片机独立按键实现了一个小玩意——简易抢答器，这个很简单，涉及到了八段数码管的动态扫描显示，以及独立按键的消抖等。期间遇到了一个小问题，就是抢答器在一个人按下之后需要将数码管显示锁定，这个可以使用一个标志位来实现。

程序：

#include <reg51.h>
    
    #define uchar unsigned char
    #define dataport P2
    #define control P0
    	
    sbit compere = P1^0;
    sbit num1 = P1^1;
    sbit num2 = P1^2;
    sbit num3 = P1^3;
    sbit num4 = P1^4;
    sbit num5 = P1^5;
    sbit num6 = P1^6;
    sbit num7 = P1^7;
    sbit suo = P0^3;
    
    uchar code seg_code[]  = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x00};
    uchar code col_code[]  = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
    uchar temp;
    uchar flag = 1;
    
    void display(uchar first, uchar num);
    void Delay10ms();		//@12.000MHz
    	
    void main()
    {
    	while(1)
    	{
    		if(!compere)
    		{
    			Delay10ms();
    			if(!compere)
    			{
    				while(!compere);
    				temp = 10;
    				flag = 1;
    				display(0, 8);
    			}
    		}
    		
    		if(flag)
    		{
    			if(!num1)
    			{
    				Delay10ms();
    				if(!num1)
    				{
    					while(!num1);
    					temp = 1;
    					display(1, 1);
    					flag = 0;
    				}
    			}
    		}
    		
    		if(flag)
    		{
    			if(!num2)
    			{
    				Delay10ms();
    				if(!num2)
    				{
    					while(!num2);
    					temp = 2;
    					display(2, 1);
    					flag = 0;
    				}
    			}
    		}
    		
    		if(flag)
    		{
    			if(!num3)
    			{
    				Delay10ms();
    				if(!num3)
    				{
    					while(!num3);
    					temp = 3;
    					display(3, 1);
    					flag = 0;
    				}
    			}
    		}
    		
    		if(flag)
    		{
    			if(!num4)
    			{
    				Delay10ms();
    				if(!num4)
    				{
    					while(!num4);
    					temp = 4;
    					display(4, 1);
    					flag = 0;
    				}
    			}
    		}
    		
    		if(flag)
    		{
    			if(!num5)
    			{
    				Delay10ms();
    				if(!num5)
    				{
    					while(!num5);
    					temp = 5;
    					display(5, 1);
    					flag = 0;
    				}
    			}
    		}
    		
    		if(flag)
    		{
    			if(!num6)
    			{
    				Delay10ms();
    				if(!num6)
    				{
    					while(!num6);
    					temp = 6;
    					display(6, 1);
    					flag = 0;
    				}
    			}
    		}
    		
    		if(flag)
    		{
    			if(!num7)
    			{
    				Delay10ms();
    				if(!num7)
    				{
    					while(!num7);
    					temp = 7;
    					display(7, 1);
    					flag = 0;
    				}
    			}
    		}
    	}
    }
    
    void display(uchar first, uchar num)
    {
    	uchar i, j;
    	for(i = 0; i < num; i++)
    	{
    		dataport = 0x00;
    		suo = 1;
    		suo = 0;
    		
    		dataport = seg_code[temp];
    		suo = 1;
    		suo = 0;
    		
    		control = col_code[i+first];
    		j = 500;
    		while(j--);
    	}
    }
    
    void Delay10ms()		//@12.000MHz
    {
    	unsigned char i, j;
    
    	i = 117;
    	j = 184;
    	do
    	{
    		while (--j);
    	} while (--i);
    }