单片机码表的驱动程序

最新推荐文章于 2024-04-15 20:01:22 发布

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本文介绍了一种使用51单片机实现四位LED动态显示的方法，并利用定时器进行时间计数更新。通过外部按键控制时间显示的开始与停止，实现了基本的时钟功能。

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#include <reg52.h>
#include "./delay/delay.h"

#define SEGPORT P0

sbit start = P1^0;
sbit end = P1^1;
sbit seg_select = P2^1;        
sbit bit_select = P2^0;          

unsigned char flag = 1;
unsigned char duanma[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};               
unsigned char weima[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; 
unsigned char TempData[8];

unsigned char shi = 0, fen = 0, miao = 0;

void display()
{
	  static unsigned char i = 0;
	  SEGPORT = 0x0;
	  seg_select = 1;
	  seg_select = 0;
	  
	  SEGPORT = 0xff;
	  bit_select = 1;
	  bit_select = 0;
	
	  SEGPORT = TempData[i];
	  seg_select = 1;
	  seg_select = 0;
	  
	  SEGPORT = weima[i];
	  bit_select = 1;
	  bit_select = 0;
	  
		i++;
	
	  if(8 == i)
		{
				i = 0;
    }  
}

void time0_init(void)
{
	  EA = 1;             
	  TMOD |= 0x01;
	  TH0 = (65536 - 2000) / 256;
	  TL0 = (65536 - 2000) % 256;   
	  ET0 = 1;           
	  TR0 = 1;
	   

}

void time0_isr() interrupt 1
{
		static unsigned char i = 0;
    TH0 = (65536 - 200) / 256;
	  TL0 = (65536 - 200) % 256;    
	  i++;	
	  
		if(flag)
		{
				if(50 == i)	
				{
						i = 0;
						miao++;
						if(60 == miao)
						{
					 
								miao = 0;
								fen++;
							
								if(60 == fen)
								{
										fen = 0;
										shi++;
									
										if(24 == shi)
										{
												shi = 0;
										
										}
								}
						}
				}
		}	
		TempData[0] = duanma[shi / 10];
		TempData[1] = duanma[shi % 10];
		TempData[2] = 0x40;
		TempData[3] = duanma[fen / 10];
		TempData[4] = duanma[fen % 10];
		TempData[5] = 0x40;
		TempData[6] = duanma[miao / 10];
		TempData[7] = duanma[miao % 10];
}

void time1_init(void)
{
    EA = 1;                               
	  TMOD |= 0x10;                        
	  TH1 = (65536 - 2000) / 256;
	  TL1 = (65536 - 2000) % 256;          
	  ET1 = 1;                            
	  TR1 = 1;                             
		
	 
}

void time1_isr() interrupt 3             
{
    TH1 = (65536 - 2000) / 256;
	  TL1 = (65536 - 2000) % 256; 
    
	  display();
}
                

void main()
{		
	  time1_init();
		time0_init();
	  
	  while(1)
		{
			  
				if(0 == start)
				{
					  while(!start);    //È¥¶¶¶¯
						delay_ms(10);
						while(!start);
					
						if(0 == flag)
						{
								flag = 1;
						}
						else
						{
								flag = 0;
						}
				}
				
				if(0 == end)
				{
						while(!end);         //È¥¶¶¶¯
						delay_ms(10);
						while(!end);
					
						shi = 0;
						fen = 0;
						miao = 0;							
				}
		}
}

/*****delay.c***********/
void delay_us(unsigned char t)
{
		while(--t);
}

void delay_ms(unsigned char t)
{
		while(t--)
		{
			delay_us(245);
			delay_us(245);
		
		}
}

void delay_s(unsigned char t)
{
    while(t--)
		{
        delay_ms(200);
				delay_ms(200);
			  delay_ms(200);
				delay_ms(200);
			  delay_ms(200);
		}
}

/****delay.h*******/
#ifndef _DELAY_H_
#define _DELAY_H_

extern void delay_us(unsigned char t);
extern void delay_ms(unsigned char t);
extern void delay_s(unsigned char t);

#endif