用51实现码表

最新推荐文章于 2024-12-25 14:06:44 发布

原创最新推荐文章于 2024-12-25 14:06:44 发布 · 565 阅读

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该博客介绍了一种使用51单片机实现码表的方法，通过配置定时器初始化并设置中断，实现时间计数和显示。程序中包含时间数据存储、位码和段码定义，以及不同时间状态下的蜂鸣器声音播放。

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#include <reg52.h>
#include "./delay/delay.h"
#define KEYPORT P1		 //P0口

#define TIMEPORT P0		 //P0口
#define M_H_TIME 60		 //1min = 60s, 1hour = 60min
#define DAY_TIME 24		 //1day = 24h

sbit bit_select = P2^0;	 //位选
sbit seg_select = P2^1;	 //段选
sbit beep = P2^7;

unsigned char code freq[][2]={ 
  0xD8,0xF7,//00440HZ 1   
  0xBD,0xF8,//00494HZ 2  
  0x87,0xF9,//00554HZ 3  
  0xE4,0xF9,//00587HZ 4    
  0x90,0xFA,//00659HZ 5     
  0x29,0xFB,//00740HZ 6     
  0xB1,0xFB,//00831HZ 7      
  0xEF,0xFB,//00880HZ `1
}; 

unsigned char star_star[42] = {
    0,0,4,4,5,5,4,3,3,2,2,1,1,0,
	4,4,3,3,2,2,1,4,4,3,3,2,2,1,
	0,0,4,4,5,5,4,3,3,2,2,1,1,0
};
unsigned char happy_sing[12] = {
    2,2,3,4,4,3,2,1,0,0,1,2
	};


unsigned char High;
unsigned char Low;

unsigned char timedata[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};  //存放显示数字
unsigned char bitdata[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};              //存放位码	
unsigned char tmpdata[8] = {0};
unsigned char second = 100;	  //计秒
unsigned char minute = 9;	  //计分
unsigned char hour = 0;		  //计小时

void timer0_init(void)
{
    EA = 1;
	TMOD |= 0X01;
	TH0 = (65536 - 200) / 256;
	TL0 = (65536 - 200) % 256;
	ET0 = 1;
	TR0 = 1;
}

 void timer1_init(void)
{
    EA = 1;
	TMOD |= 0X10;
	TH1 = (65536 - 2000) / 256;
	TL1 = (65536 - 2000) % 256;
	ET1 = 1;
	TR1 = 1;
}

void display_time(void)
{
    static unsigned char i = 0;
    TIMEPORT = 0x00;	//清空段选值
	seg_select = 1;
	seg_select = 0;
	TIMEPORT = 0xff;	//清空位选值
	bit_select = 1;
	bit_select = 0;

	TIMEPORT = bitdata[i];      //位选
	bit_select = 1;
	bit_select = 0;
	TIMEPORT = tmpdata[i];	//段选
	seg_select = 1;
	seg_select = 0;
	
	i++;
	if(8 == i)
	{
	    i = 0;
	}
}

void main()
{
    unsigned char j = 0;
    unsigned char k = 0;
    unsigned char num = 0;	
    
	timer0_init();
	timer1_init();
	
	while(1)
	{
	    if(minute != 0)
		{
		    for(j = 0; j < 10; j++)
			{
				 beep = ~beep;   
			}
		}
		else
		{
    //		num = star_star[i];
	        num = happy_sing[k];		
	
			High = freq[num][1];
		    Low = freq[num][0];
			TR0 = 1;
			delay_ms(200);
	
			delay_ms(200);
	
			delay_ms(200);
	
			TR0 = 0;
			delay_ms(100);
			k++;
			if(10 == k)
			{
			    k = 0;
			}
	
	
		}

	}
}

void timer0_ist() interrupt 1
{
    if(minute != 0)
	{
		static unsigned char i = 0;
	    TH0 = (65536 - 100) / 256;
		TL0 = (65536 - 100) % 256;
		i--;
	
		if(10 == i)
		{
			i = 0;
			second--;
			if(0 == second)				//秒数 == 100 时
			{
			    second = 100;
			    minute--;
	            if(0 == minute)
				{
				    minute = 0;
					TR1 = 0;
				}
			}
	
		}
	}
	else
	{
	    TH0 = High;
		TL0 = Low;
	
		beep = ~beep;
 
	}
 	tmpdata[0] = timedata[hour / 10];
	tmpdata[1] = timedata[hour % 10];
    tmpdata[2] = 0x40;
	tmpdata[3] = timedata[minute / 10];
	tmpdata[4] = timedata[minute % 10];
	tmpdata[5] = 0x40;
	tmpdata[6] = timedata[second / 10];
	tmpdata[7] = timedata[second % 10];


}

void timer1_ist() interrupt 3
{
	TH1 = (65536 - 1000) / 256;
	TL1 = (65536 - 1000) % 256;
	
	display_time();
}