lcd_driver.c

AVR控制12864液晶画圆弧,在AVR单片机的控制下完成圆弧的绘制。

//**********************************************************
//本文件实现了用于驱动KS0108B/HD61202的基本常量和
//函数，用于基本的读写操作（没有实现读的函数，
//当然你可以自己实现）.
//              ---北京交通大学电气学院 杨罡 2008.8
//**********************************************************

#include  "LCD_DRIVER.H"

//***********************************************************
//if you want it to run on the protues then define this below
//***********************************************************
#define debug_protues
//***********************************************************

void lcd_out_dat_l( unsigned char dat)

{    
     choose_left_screen();
     LCD_DATA_MODE();   //D_I = CMD_MODE;
	 LCD_WRITE_MODE();  //R_W=WRITE_MODE;
	 LCD_E_HIGH();      //E=1;
	 DATA_PORT=dat;
	 _delay_us(2);
	 LCD_E_LOW();       //E=0;
	  _delay_us(2);
}

void lcd_out_dat_r(  unsigned char dat)
{    
     choose_right_screen() ;
     LCD_DATA_MODE();   //D_I = CMD_MODE;
	 LCD_WRITE_MODE();  //R_W=WRITE_MODE;
	 LCD_E_HIGH();      //E=1;
	 DATA_PORT=dat;
	  _delay_us(2);
	 LCD_E_LOW();       //E=0;
	  _delay_us(2);
}
void lcd_out_ctl_l( unsigned char cmd)
{
     choose_left_screen();
     LCD_CMD_MODE();    //D_I = CMD_MODE;
	 LCD_WRITE_MODE();  //R_W=WRITE_MODE;
	 LCD_E_HIGH();      //E=1;
	 DATA_PORT=cmd;
	  _delay_us(2);
	 LCD_E_LOW();       //E=0;
      _delay_us(2);
}
void lcd_out_ctl_r( unsigned char cmd)
{    
     choose_right_screen() ;
     LCD_CMD_MODE();    //D_I = CMD_MODE;
	 LCD_WRITE_MODE();  //R_W=WRITE_MODE;
	 LCD_E_HIGH();      //E=1;
	 DATA_PORT=cmd;
	  _delay_us(2);
	 LCD_E_LOW();       //E=0;
      _delay_us(2);
}
void lcd_out_ctl( unsigned char cmd,  unsigned char nctrl)
{
      if(nctrl==1)lcd_out_ctl_l(cmd);
	  if(nctrl==2)lcd_out_ctl_r(cmd);
	  if(nctrl==3){
	                lcd_out_ctl_l(cmd);
					lcd_out_ctl_r(cmd);
				   }
}
void lcd_out_dat( unsigned char dat,  unsigned char nctrl)
{
     if(nctrl==1)lcd_out_dat_l(dat);
	  if(nctrl==2)lcd_out_dat_r(dat);
	  if(nctrl==3){
	               lcd_out_dat_l(dat);
				   lcd_out_dat_r(dat);
				  }
}
void   choose_left_screen(void)   
{ 
   #ifndef debug_protues
  LCD_LEFT_SELECT();
  LCD_RIGHT_STOP();
  #else
  LCD_LEFT_STOP();
  LCD_RIGHT_SELECT();
  #endif
}
void   choose_right_screen(void)  
{
  #ifndef debug_protues
  LCD_LEFT_STOP();
  LCD_RIGHT_SELECT();
  #else
  LCD_LEFT_SELECT();
  LCD_RIGHT_STOP();
  #endif
}
void   choose_full_screen(void)  
{
  LCD_LEFT_SELECT();
  LCD_RIGHT_SELECT();
}
void   choose_no_screen(void)     
{
   LCD_LEFT_STOP();
   LCD_RIGHT_STOP();
}

unsigned char lcd_read_byte( unsigned char x,unsigned char y )
{
    /*if(which & 1== 1)
	{
	  choose_left_screen();
	  LCD_CMD_MODE();//D_I=0;
	  LCD_READ_MODE();//R_W=READ_MODE;
	  do
	 {DATA_PORT=0xff;//??????????????????????????????
	  LCD_E_HIGH():E=1;
	  tmp=DATA_PORT;
	  LCD_E_LOW();//E=0;
	 }while( !(tmp&0x80) );
	 LCD_DATA_MODE();//D_I=DATA_MODE;
	 DATA_PORT=0x0ff;
	 LCD_E_HIGH();//E=1
	 tmp=DATA_PORT;
	 LCD_E_LOW()://E=0;
	 return tmp;
	}
	if(which &2== 2)
	{
	  choose_right_screen();
	  LCD_CMD_MODE();//D_I=0;
	  LCD_READ_MODE();//R_W=READ_MODE;
	  do
	 {DATA_PORT=0xff;//????????????????????????????????
	  LCD_E_HIGH();//E=1;
	  tmp=DATA_PORT;
	  LCD_E_LOW();//E=0;
	 }while( !(tmp&0x80) );
	 LCD_DATA_MODE();//D_I=DATA_MODE;
	 DATA_PORT=0x0ff;
	 LCD_E_HIGH();//E=1
	 tmp=DATA_PORT;
     LCD_E_LOW();//E=0;
	 return tmp;
	}*/
	return 1;
}
unsigned char lcd_is_busy( void )
{  
   unsigned char tmp;
   LCD_CMD_MODE();//D_I=CMD_MODE;
   LCD_READ_MODE();//R_W=READ_MODE;
   DATA_PORT=0x0ff;//?????????????????????????
   LCD_E_HIGH();//E=1;
   tmp=DATA_PORT;
   LCD_E_LOW();//E=0;
   return tmp&0x80;
}
void lcd_init(void)
{
  _delay_us(3000);
  //choose_full_screen();
  //write_cmd(DISPLAY_FIRST_ROW);//first row display 0x0c0
  //write_cmd(DISPLAY_ON);//open display 0x03f
  //choose_no_screen(); 
  lcd_out_ctl(DISPLAY_FIRST_ROW,3);
  lcd_out_ctl(DISPLAY_ON,3);
 
  
}
void write_rect(unsigned char page0,unsigned char y0,
                unsigned char *dat)
{

}
void read_rect(unsigned char x0,unsigned char y0,
               unsigned char x1,unsigned char y1)
{

}			   

void write_to_xy(unsigned char x,unsigned char y,unsigned char dat)
{
  unsigned char page;
  page=y>>3;
  if(x>63)
  { x=x-64;
    //choose_right_screen();
    lcd_out_ctl_r(LCD_SET_PAGE+page);
	lcd_out_ctl_r(LCD_SET_COL+x);
	lcd_out_ctl_r(dat);
  }
  else    
  { //choose_left_screen();
    lcd_out_ctl_l(LCD_SET_PAGE+page);
	lcd_out_ctl_l(LCD_SET_COL+x);
	lcd_out_ctl_l(dat);
  }
}

void set_xy(unsigned char x,unsigned char y)
{
 unsigned char page;
  page=y>>3;
  if(x>63)
  { x=x-64;
    //choose_right_screen();
    lcd_out_ctl_r(LCD_SET_PAGE+page);//write_cmd(PAGE_CO+page);
	lcd_out_ctl_r(LCD_SET_COL+x);//write_cmd(ROW_CO+x);
  }
  else    
  { //choose_left_screen();
    lcd_out_ctl_l(LCD_SET_PAGE+page);
	lcd_out_ctl_l(LCD_SET_COL+x);
  }
}

void write_to_lcd(unsigned char dat)
{
  lcd_out_dat_l(dat);
}