#define LCD_BUS PORTC 
#define _WR PORTA.0                                        //复位信号 
#define _RD PORTA.1                                         //芯片选择 
#define _CS PORTA.2                                       //寄存器选择信号 
#define _A0 PORTA.3                                         //读信号 
#define _RES PORTA.4                                        //写信号                                      //写信号 
                                                                          
union kdx{    
            char si[2];
            int k;
        };

//------------------------------------------------------------------------------ 
//延迟子程序 
//------------------------------------------------------------------------------ 
#pragma used+
void Delay(unsigned int t) 
{ 
     unsigned int i,j; 
     for(i=0;i<t;i++) 
         for(j=0;j<10;j++); 
}   
#pragma used-
//------------------------------------------------------------------------------ 
//写指令代码 
//------------------------------------------------------------------------------   
#pragma used+
void CmdWrite(unsigned char cmdcode) 
{ 
     _CS=0; 
     _A0=1; 
     LCD_BUS=cmdcode;                                 //写入指令代码 
     _RD=1; 
     _WR=0;
     _WR=1; 
     _CS=1; 
}        
#pragma used-
//------------------------------------------------------------------------------ 
//写数据或参数 
//------------------------------------------------------------------------------ 
#pragma used+
void DataWrite(unsigned char wrdata) 
{ 
     _CS=0; 
     _A0=0; 
     LCD_BUS=wrdata;                                  //写入数据或参数 
     _RD=1; 
     _WR=0; 
	 _WR=1; 
     _CS=1; 
}  
#pragma used-
//------------------------------------------------------------------------------ 
//写入字符串 
//------------------------------------------------------------------------------   
#pragma used+
void PrintStrROM(char flash *pstr) 
{ 
      CmdWrite(0x42); 
      while(*pstr>0) 
      { 
            DataWrite(*pstr); 
            pstr++; 
      } 
}       
#pragma used-  

#pragma used+
void PrintStrRAM(char *pstr) 
{ 
      CmdWrite(0x42); 
      while(*pstr>0) 
      { 
            DataWrite(*pstr); 
            pstr++; 
      } 
}       
#pragma used-
//------------------------------------------------------------------------------ 
//整屏幕写入数据 
//------------------------------------------------------------------------------ 
#pragma used+
void FullScreenFill(unsigned char low,unsigned char high,unsigned char fill_data) 
{ 
      unsigned char i,j; 
      CmdWrite(0x46);                                 //光标显示位置设置 
      DataWrite(low); 
      DataWrite(high); 
      CmdWrite(0x42); 
      for(i=0;i<128;i++) 
         for(j=0;j<32;j++) 
             DataWrite(fill_data); 
 } 
#pragma used-
//------------------------------------------------------------------------------ 
//模块初始化 
//------------------------------------------------------------------------------      
#pragma used+
void LCD_Initial() 
{ 

	 _RES=0; 
     Delay(100); 
     _RES=1; 
     Delay(100); 

     CmdWrite(0x40);                            //系统设置 
     DataWrite(0x32);                           //P1参数：单屏幕，CGROM+CGRAM1+CGRAM2 
     DataWrite(0x85);                           //P2参数：6点列 
     DataWrite(0x07);                           //P3参数：8点行 
     DataWrite(0x19);                           //P4参数：显示窗口宽度为 26 
     DataWrite(0x20);                           //P5参数：TC/R>=C/R+4 
     DataWrite(0xA0);                           //P6参数：160扫描行 
     DataWrite(0x1A);                           //P7参数：APL 
     DataWrite(0x00);                           //P8参数：APH 

     CmdWrite(0x44);                             //显示区域设置 
     DataWrite(0x00);                           //显示一区首地址为 0000H 
     DataWrite(0x00); 
     DataWrite(0xA0);                           //显示一区的扫描行数 160行 
     DataWrite(0x00);                           //显示二区首地址为 0C80H 
     DataWrite(0x10); 
     DataWrite(0xA0);                           //显示二区的扫描行数 160行 
     DataWrite(0x00);                           //显示三区首地址为 1900H 
     DataWrite(0x20); 


     CmdWrite(0x58);                             //显示状态设置，显示总开关关闭 
     DataWrite(0x54);                           //打开各区显示和光标 

     CmdWrite(0x5b);                            //合成方式设置 
     DataWrite(0x00);                           //两重合成显示，一、三区为文本，三个区"或"关系 

     CmdWrite(0x5c);                            //CGRAM的起始地址为7800H 
     DataWrite(0x00); 
     DataWrite(0x80); 

     CmdWrite(0x5d);                            //光标形状设置 
     DataWrite(0x07); 
     DataWrite(0x06); 
     CmdWrite(0x4c);                            //光标移动方向设为向右 

     FullScreenFill(0x00,0x00,0x00);             //清显示一区 
     FullScreenFill(0x00,0x10,0x00);             //清显示二区 
     FullScreenFill(0x00,0x20,0x00);             //清显示三区 

     CmdWrite(0x59);                            //打开显示总开关 
     DataWrite(0x04);							  //04无光标，05无闪烁，07闪烁
 } 
#pragma used-

#pragma used+
void SetICON(char y,char x)
	{
		union kdx PX; 
		PX.k=(int)y*26+x;
		CmdWrite(0x46);                             //定义光标在显示一区位置 
     	DataWrite(PX.si[0]); 
     	DataWrite(PX.si[1]); 			
	}
#pragma used-

#pragma used+
void displayROM(char y,char x,char flash *str)
	{
        SetICON(y,x);
   		PrintStrROM(str);			
	}
#pragma used-

#pragma used+
void displayRAM(char y,char x,char *str)
	{
        SetICON(y,x); 
   		PrintStrRAM(str);			
	}
#pragma used-

#pragma used+
void displayB(char y,char x,char cx)
	{
        SetICON(y,x);
      	CmdWrite(0x42); 
        DataWrite(cx); 			
	}
#pragma used-        

#pragma used+
void displayB0(char cx)
	{
      	CmdWrite(0x42); 
        DataWrite(cx); 			
	}
#pragma used-