main_lsd.c

用单片机的C语言实现的开机时间显示上次关机时间（存在看门狗里）

    {
	 if((c<<count)&0x80) SDA=1;
	 else                SDA=0;
	 NOP();
	 SCL=1;
	 NOP();
	 NOP();
	 NOP();
	 NOP();
	 NOP();
	 SCL=0;
	}
	NOP();
	NOP();
	SDA=1;      /*begin to check the ack signal*/
	NOP();
	NOP();
	SCL=1;
	NOP();
	NOP();
	NOP();
	if(SDA==1) ACK=0;
	else       ACK=1;
	SCL=0;
	NOP();
	NOP();
   }
/*************************************************/

/****  receive byte from the i2c device  *****/

uchar RdByte()  
 {
  uchar c;
  uchar count;
  
  c=0;
  SDA=1;
  for(count=0;count<8;count++)
   {
    NOP();
	SCL=0;
	NOP();
	NOP();
	NOP();
	NOP();
	NOP();
	SCL=1;
	NOP();
	NOP();
	c=c<<1;
	if(SDA==1) c=c+1;
	SCL=0;
	NOP();
	NOP();
   }
   SCL=0;
   NOP();
   NOP();
  return(c);
 }
/*************************************************/

/*****  write string to the i2c device  *****/
bit WrStr(uchar WrAddr,uchar sub_addr,uchar Data )
 {
  Start_i2c();
  WrByte(WrAddr);//write device address
  if(ACK==0) return(0);//not ACKed
  WrByte(sub_addr);//write regiset address
  if(ACK==0) return(0);
  WrByte(Data);//write data
  if(ACK==0) return(0);
  Stop_i2c();
  return(1);
 }
/*************************************************/

/****  read string from the i2c device  *******/
uchar RdStr(uchar WrAddr,uchar sub_addr)  
 {
  uchar Data;
  Start_i2c();
  WrByte(WrAddr);
  if(ACK==0) return(0);
  WrByte(sub_addr);
  if(ACK==0) return(0);
  
  Start_i2c();
  WrByte(WrAddr+1);
  if(ACK==0) return(0);
  
   
   	Data=RdByte();   
                   /*flag ack signal*/
    MACK(1);
   Stop_i2c();
   return(Data);
 }
/****************************************************/
//**         the end of the sub functions of I2c    */                                
/****************************************************/

 
/********************************************************
               The function about x5045
*********************************************************/
/*****************  read data  *****************/
uchar Read8()     
 {
  bit bData;
  uchar count;
  uchar Data;
  for(count=0;count<8;count++)
   {
    SCK=1;
	SCK=0;
	bData=SDO;
	Data<<=1;
	if(bData) Data+=1;
   }
	return Data;
  }
/****************************************************/

/*****************  write data  *****************/
void Write8(uchar Data)  
 {
  uchar count;
  for(count=0;count<8;count++)
   {
    if((Data&0x80)==0)
	{ SDI=0;}
	else
	{ SDI=1;}
	 SCK=0;
	 SCK=1;
	 Data<<=1;
   }
 }
/****************************************************/

/***************************************************/
uchar ReadSR()
 {
  uchar Data;
  CS=0;
  Write8(RDSR);
  Data=Read8();
  CS=1;
  return Data;
 }
/****************************************************/

/****************************************************/
void WriteSR(uchar Data)
 {
  CS=0;
  Write8(WREN);
  CS=1;
  CS=0;
  Write8(WRSR);
  Write8(Data);
  CS=1;
 }
/****************************************************/

/****************************************************/
void WriteByte(uchar Data,uchar address)
 {
  while((ReadSR()&0x01)==1);
  CS=0;
  Write8(WREN);
  CS=1;
  CS=0;
  Write8(WRITE0);
  Write8(address);
  Write8(Data);
  SCK=0;
  CS=1;
 }
/****************************************************/

/****************************************************/
uchar ReadByte(uchar address)
 {
  uchar Data;
  while((ReadSR()&0x01)==1);
  CS=0;
  Write8(READ0);
  Write8(address);
  Data=Read8();
  CS=1;
  return Data;
 }

/********************  key  *****************************/

/*********************************************************************************
               The module of KeyboradScan()
**********************************************************************************/
uchar KeyboradScan( )
{
	uchar i,scode;//scode为中间变量
	com8155 = 0x02;
  	pb8155 = 0x00;
    if( key_busy == 0 )
	{
		delay( 10 );//延时20ms消抖动
		if ( key_busy == 0 )
		{
			scode=0xFE;//逐列扫描
			for ( i=0;i<8;i++ )
			{
				pb8155=scode;
				if(key_busy==0)
                {
                   	if ( IndexForCom8155 & 0x10 == 0 )
                        return ( i + 8 );
                    else
                        return ( i + 1 );
                }
                    else
                        scode = ( scode <<1 ) | 0x01;//列扫描码左移
            }
		}
	}
	return ( 0 );
}
/*******************************************************/

/*******************************************************
          the module of display the last off time       /
*********************************************************/
void DisplayOffTime( )
{
    uchar a,b;
         
    LCOMM=0x3F;//turn on the left LCD
    LCOMM=0xC0;//display the top of LCD
    LCOMM=0x40;//
    RCOMM=0x3F;//turn on the right LCD
    RCOMM=0xC0;//display the top of LCD
    RCOMM=0x40;//

//The follow program display the last off time 
   
   for ( a = 0; a < 4; a++ )       // clear the LCD screen
    {
    	for ( b = 0; b < 4; b++ )
    	{    
    		display( 0x09,16,(0xB8+2*a),(0x40+b*16),0 );
            display( 0x09,16,(0xB8+2*a),(0x40+b*16),1 );    		
		}
	}
 while(KeyboradScan()==0) //display the last off time 
  {  
    WriteSR(0x30);               
    year=ReadByte(0x00);
    month=ReadByte(0x01);
    day=ReadByte(0x02);
    hour=ReadByte(0x03);
    minute=ReadByte(0x04);
    second=ReadByte(0x05);
    date=ReadByte(0x06);
     
    year1=(year>>4)&0x0f;	
    year0=year&0x0f;
    month1=(month>>4)&0x01;
    month0=month&0x0f;
    day1=(day>>4)&0x03;
    day0=day&0x0f;
    hour1=(hour>>4)&0x03;
    hour0=hour&0x0f;
    minute1=(minute>>4)&0x07;
    minute0=minute&0x0f;
    second1=(second>>4)&0x07;
    second0=second&0x0f;
    date0=date&0x07;
 
    display(year1,8,0xb8,0x40,0);
    display(year0,8,0xb8,0x48,0);
    display(0x07,16,0xb8,0x50,0); //年
    display(month1,8,0xb8,0x60,0);
    display(month0,8,0xb8,0x68,0);
 	
    display(0x08,16,0xb8,0x70,0); //月
    display(day1,8,0xb8,0x40,1);
    display(day0,8,0xb8,0x48,1);
    display(0x00,16,0xb8,0x50,1); //日
    display(0x09,16,0xb8,0x60,1); 
    display(date0,16,0xb8,0x70,1); //weekday
 	
    display(0x14,16,0xba,0x40,0); //关
    display(0x15,16,0xba,0x50,0); //机
    display(0x12,16,0xba,0x60,0); //时
    display(0x13,16,0xba,0x70,0); //刻
 	
    display(hour1,8,0xba,0x40,1);
    display(hour0,8,0xba,0x48,1);
    display(0x10,8,0xba,0x50,1);
    display(minute1,8,0xba,0x58,1);
    display(minute0,8,0xba,0x60,1); 
    display(0x10,8,0xba,0x68,1);
    display(second1,8,0xba,0x70,1);
    display(second0,8,0xba,0x78,1);
   }
    return;
}
/*****************************************************************/

/*****************************************************************
          The module of SettingHandonTime function
*****************************************************************/
void SettingHandonTime( )
{
    uchar Key;
     
    year3 = year1;//get time from off time
    year2 = year0;
    month3 = month1;
    month2 = month0;
    date3 = day1;
    date2 = day0;
    day3 = date0;
    hour3 = hour1;
    hour2 = hour0;
    minute3 = minute1;
    minute2 = minute0;
    second3 = second1;
    second2 = second0;

    display( year3,8,0xB8,0x40,0 );
    display( year2,8,0xB8,0x48,0 );
    display( 0x07,16,0xB8,0x50,0 ); //年
    
    display( month3,8,0xB8,0x60,0 );
    display( month2,8,0xB8,0x68,0 );	
    display( 0x08,16,0xB8,0x70,0 ); //月  
         
    display( date3,8,0xB8,0x40,1 );
    display( date2,8,0xB8,0x48,1 );
    display( 0x00,16,0xB8,0x50,1 ); //日
    
    display( 0x09,16,0xB8,0x60,1 ); 
    display( day3,16,0xB8,0x70,1 ); //星期
    
    display(0x29,16,0xba,0x40,0); //上
    display(0x30,16,0xba,0x50,0); //传
    display(0x09,16,0xba,0x70,0); //空格
    
    display( hour3,8,0xBA,0x40,1 ); //hour
    display( hour2,8,0xBA,0x48,1 );
    display( 0x10,8,0xBA,0x50,1 ); // :
    display( minute3,8,0xBA,0x58,1 ); //minute
    display( minute2,8,0xBA,0x60,1 );
    display( 0x10,8,0xBA,0x68,1 ); // :
    display( second3,8,0xBA,0x70,1 ); //second
    display( second2,8,0xBA,0x78,1 );

    delay( 20 );    
    while ( 1 )
    {
    //set year
    YEAR0: 
        display( 0x07,16,0xBA,0x60,0 ); //年
        Key = KeyboradScan(); 
        while ( ( Key ==0 ) | ( Key > 4 ) )
        {
        	Key = KeyboradScan();
    	}
    	delay( 10 );    
        if ( Key ==1 )   //add
        {
         	if ( year2 == 9 )
         	{
         	    year2 = 0;
         		if ( year3 == 9 )
         		    year3 = 0;
         		else
         		    year3++;
     		}
     		else
     		    year2++;
     	}
     	
     	else if ( Key == 2) //subtract
     	{
     		if ( year2 == 0 )
     		{
     			if ( year3 == 0 )
     			{
     				year3 = 9;
     				year2 = 9;
 				}
 				else
 				{
 					year3--;
 					year2 = 9;
				}
 			}
 			else
 			    year2--;
 		}
 		
 		
 		display( year3,8,0xB8,0x40,0 );
 		display( year2,8,0xB8,0x48,0 );
 		year4 = ( year3 << 4 ) | year2; //pass new year
 		
 		if ( Key == 4 )
 		    break;
 		else if ( Key == 3 )
 		    goto MONTH0;
 		goto YEAR0;
 		 
   //set month    
   MONTH0: 
        display( 0x08,16,0xBA,0x60,0 ); //月       
        Key = KeyboradScan(); 
        while ( ( Key ==0 ) | ( Key > 4 ) )
        {
        	Key = KeyboradScan();
    	}
    	delay( 10 );    
 		if ( Key == 1 ) // add
 		{
 			if ( month3 == 1 )
 			{
 				if ( month2 == 2 )
 				{
 					month3 = 0;
 					month2 = 1;
				}
				else
				    month2++;
			}
			else if ( month2 == 9 )
			{
				month3 = 1;
				month2 = 0;
			}
			else
			    month2++;			    
		} 
		
		else if ( Key == 2 ) //substract
		{
			if ( month3 == 0 )
			{
				if ( month2 == 1 )
				{
					month3 = 1;
					month2 = 2;
				}
				else if ( month2 == 0 )
				{
					month3 = 1;
					month2 = 2;
				}				
				else
				    month2--;
			}
			else if ( month2 == 0 )
			{
				month3 = 0;
				month2 = 9;
			}
			else
			    month2--;
		}		
		
 		display( month3,8,0xB8,0x60,0 );
 		display( month2,8,0xB8,0x68,0 );
 		month4 = ( month3 << 4 ) | month2; //pass new month
 		
 		if ( Key == 4 )
 		    break;
 		else if ( Key == 3 )
 		    goto DATE0;
 		goto MONTH0;

   //set date
   DATE0: 
        display( 0x00,16,0xBA,0x60,0 ); //日       
        Key = KeyboradScan(); 
        while ( ( Key ==0 ) | ( Key > 4 ) )
        {
        	Key = KeyboradScan();
    	}
    	delay( 10 );
 		if ( Key == 1 ) // add
 		{
 			if ( date3 == 3 )
 			{
 				if ( date2 == 1 )
 				{
 					date3 = 0;
 					date2 = 1;
				}
				else
				    date2++;
			}
			else if ( date2 == 9 )
			{
				date2 = 0;
				date3++;
			}
			else
			    date2++;
		}
		
		else if ( Key == 2 ) //substract
		{
			if ( date3 == 0 )
			{
				if ( date2 == 1 )
				{
					date3 = 3;
					date2 = 1;
				}
				else if ( date2 == 0 )
				{
					date3 = 3;
					date2 = 1;
				}				
				else
				    date2--;
			}
			else if ( date2 == 0 )