text2.c

单片机方面的程序

#include <reg51.h>					
#include <intrins.h>					

//--------LCD control bit---------------
sbit  LCD_RS   = P2^0;    
sbit  LCD_RW   = P2^1;    
sbit  LCD_EN    = P2^4;
sbit INT_0 =P3^2;
 #define LCDDATA   P0    
unsigned char KeyValue,timer0_tick=0,Flag_time=0;


typedef struct { 
                char    hour;
                char    minute;
                char    second;
}time;
time now={11,28,45} ;


void delay_10ms()      
{
	unsigned char k;
	   for (k=0;k<20;k++);
}
void delay()      
{
	unsigned char j,k;
	for (j=0;j<100;j++);
	   for (k=0;k<200;k++);
} 
void WriteCommand(unsigned char c)   
{
	delay_10ms();
	LCD_RS=0;
	LCD_RW=0;
	_nop_();
	LCD_EN=1;
	LCDDATA=c;
	LCD_EN=0;
}
			
void WriteData(unsigned char c)   
{
	delay_10ms();

	LCD_RS=1;
	LCD_RW=0;
	_nop_();
	LCD_EN=1;
	LCDDATA=c;
	LCD_EN=0;

}

void ShowChar(unsigned char pos,unsigned char c)   
{
	WriteCommand(pos+0x80);
	WriteData(c);
}
void ShowString(unsigned char ptr)    
{
    unsigned char i=0,j=0x80;
     while(i<8)
	 {
	    if(ptr&j)
		{
		     
	         ShowChar(3+i,'1') ;
			 }
		else  {
		     
	         ShowChar(3+i,'0') ;
			 }
		i++; 
		j=j>>1;
	}
	ShowChar(11,' ') ;
	

}			

void InitLCD(void)    
{    
    delay_10ms();
	WriteCommand(0x38);  
	WriteCommand(0x38);  
	WriteCommand(0x06);   
	WriteCommand(0x0C); 
	//WriteCommand(0x01);  
	WriteCommand(0x80);  
}

void	Ex0_Key() interrupt 0 using 0 
 { 
    unsigned char  x,y;
    EA=0;
	delay();
	x=P1;
	P1=0xff;
	P1=0xf0;
	y=P1;
    KeyValue=x+y;
   ShowString(KeyValue);
   //ShowChar(6,KeyValue+0x30) ;
	 switch(KeyValue)
	{
	 // case 0xee: Flag_time=1;
	 
    }
   P1=0x0f;
	 EA=1;
 }
 void initTimer (void)
{

	EA=0; 
 	TMOD=0x01;
	TH0=-9460/256;
	TL0=-9460%256;         //初始化计数器初值,
	PT0=1;
	TR0=1;
	ET0=1;
    EA =1;
}
void ShowTime()
{
   ShowChar(4,now.hour/10+0x30);
   ShowChar(5,now.hour%10+0x30);
   ShowChar(6,':');
   ShowChar(7,now.minute/10+0x30);
   ShowChar(8,now.minute%10+0x30);
   ShowChar(9,':');
   ShowChar(10,now.second/10+0x30);
   ShowChar(11,now.second%10+0x30);
}
void timer0 (void) interrupt 1
{	 
	TR0=0;
    TH0=-9460/256;
	TL0=-9460%256;         //初始化计数器初值	
    TR0=1;
    timer0_tick++;
	if (timer0_tick==100)
   {
        timer0_tick=0;
		/***********************************************************/		         
        	if(now.second==59)
           		{
			   		now.second=0;            
            		if (now.minute==59) 
              			{ 
               				now.minute=0;              	
							if (now.hour==23)
                  				{
			 						
									now.hour = 0;
        							now.minute =0;
        							now.second =0; 									 
                  				}else now.hour++;
               			}else now.minute++;            	  
           		}else  now.second++;
	    if(Flag_time)
		{
		    ShowTime();
		}
	/*	else if(Flag_xhtime)
		{
		   CycShow();
		} */
		 		
		  
  }             
}

void main (void)
{
      InitLCD();
	  initTimer();
	  P1=0x0f;
	 
	  IT0=1;
	  EX0=1;
	 EA=1;
    ShowChar(2,'r') ; 
	  while(1)
	  {
	;
		
	   }

}