lcd12864.c

该模板使用于周立功公司研发的EasyARM2100系列开发板

#include "system.h"

#define DISPLAY_ON                0X3F
#define DISPLAY_START_LINE        0XC0

#define SET_X_ADDRESS             0XB8
#define SET_Y_ADDRESS             0X40

#define   CLMADD   0x40        //第1单元的起始地址
#define   PAGEADD  0xb8        //第1页的起始地址
//-----------------------
volatile uint32 key_delay=0;
volatile uint8 key_value=0;
volatile uint8 key_value0=0;

volatile uint8 Bkey_been_down=0;
volatile uint8 temp_value=0;
volatile uint8 Bkey_delay=0;

uint8 data; 
uint8 Bread_key=0;

void lcd_input(void)//端口配置为输入
{
 IO0DIR = IO0DIR&0xe47fffff;
 IO1DIR = IO1DIR&0xfff1ffff;
}

void lcd_output(void)  //端口配置为输出
{
 IO0DIR |= IO0DIR|LCD_CS1|LCD_CS2|LCD_RW|LCD_E|LCD_D0|LCD_D2|LCD_D3|LCD_D5|LCD_D7;
 IO1DIR |= IO1DIR|LCD_RS|LCD_D1|LCD_D4|LCD_D6;
}
uint8 Read_Byte(void)//回读一个字节
 { 
  uint8 D0,D1,D2,D3,D4,D5,D6,D7,RDAT;
  lcd_input();  

  if((IO0PIN&LCD_D0)>1)         D0=1;
  else                          D0=0;
            
  if((IO1PIN&LCD_D1)>1)         D1=2;
  else                          D1=0;
          
  if((IO0PIN&LCD_D2)>1)         D2=4; 
  else                          D2=0;
               
  if((IO0PIN&LCD_D3)>1)         D3=8; 
  else                          D3=0;
            
  if((IO1PIN&LCD_D4)>1)         D4=16;
  else                          D4=0;
        
  if((IO0PIN&LCD_D5)>1)         D5=32;
  else                          D5=0;
              
  if((IO1PIN&LCD_D6)>1)         D6=64;
  else                          D6=0;           
        
  if((IO0PIN&LCD_D7)>1)         D7=128;
  else                          D7=0;
  RDAT=0;
  RDAT=D0|D1|D2|D3|D4|D5|D6|D7;
  return RDAT;
 }

uint8  Read_LCD(void)//从LCD读回一个字节
{	    
  uint8 rdata;
      	Busy();
      //	lcd_input();
    	
        lcd_delay(40);
        IO0SET|=LCD_RS;     			        //D/I=0  
        lcd_delay(40);
        IO0SET|=LCD_RW;						//R/W=1
        lcd_delay(40); 
        			
	    IO0SET|=LCD_E;//E=1	   
	    lcd_delay(40);	
        rdata=Read_Byte();
        
	    lcd_delay(40);					
    	IO0CLR|=LCD_E;//E=0
    	return rdata;
}  	
void Write_LCDByte(uint8 comd_word)//写入一个字节
 {
  if(comd_word&0x01)    IO0SET|=LCD_D0;
  else                  IO0CLR|=LCD_D0;  
            
  if(comd_word&0x02)    IO1SET|=LCD_D1;
  else                  IO1CLR|=LCD_D1;
          
  if(comd_word&0x04)    IO0SET|=LCD_D2;   
  else                  IO0CLR|=LCD_D2;
               
  if(comd_word&0x08)    IO0SET|=LCD_D3;  
  else                  IO0CLR|=LCD_D3;
            
  if(comd_word&0x10)    IO1SET|=LCD_D4;
  else                  IO1CLR|=LCD_D4;
        
  if(comd_word&0x20)    IO0SET|=LCD_D5;
  else                  IO0CLR|=LCD_D5;
              
  if(comd_word&0x40)    IO1SET|=LCD_D6;
  else                  IO1CLR|=LCD_D6;           
        
  if(comd_word&0x80)    IO0SET|=LCD_D7;
  else                  IO0CLR|=LCD_D7;
 }
//========================================================================//

void lcd_delay(uint8 delay_timer)
{
  uint8 delay_t;
  for(delay_t=0;delay_t<delay_timer;delay_t++);
}

void Busy(void)//忙判别
{  
 	lcd_output();
  	
	IO1CLR|=LCD_RS;     			        //D/I=0
	lcd_delay(40);
	IO0SET|=LCD_RW;						//R/W=1
	lcd_delay(40);
	Write_LCDByte(0X80);//PORTD=0X\F;
	IO0DIR=IO0DIR&0xff7fffff;	
		while(1)
	   {
		    IO0SET|=LCD_E;					//E=1
		    lcd_delay(25);
			IO0CLR|=LCD_E;					//E=0
	    if((IO0PIN&0x00800000)==0)   break;	   				
	   }	
}


//===========================================================================//
void write_LCD_comd0(uint8 comd_word)//向LCD写入一个字节
{	  
      	Busy();
    	lcd_output();
  	
        lcd_delay(40);
        IO1SET|=LCD_RS; //D/I=1;
        lcd_delay(40);
        IO0CLR|=LCD_RW;   //R/W=0
        lcd_delay(40);       
        Write_LCDByte(comd_word);
        lcd_delay(40);				
	    IO0SET|=LCD_E;	//E=1
	    lcd_delay(40);					
    	IO0CLR|=LCD_E;//E=0
}  	
//===========================================================================//
void write_LCD_comd1(uint8 d1,uint8 comd_word)//向LCD写一个命令字
{
        Busy();	
	    lcd_output();
  	
	    lcd_delay(40);
	    IO0CLR|=LCD_RS;	
      	lcd_delay(40);
      	IO0CLR|=LCD_RW;   
        lcd_delay(40);
        Write_LCDByte(comd_word|d1);    
      	lcd_delay(40);
      	IO0SET|=LCD_E;					
    	lcd_delay(40);
    	IO0CLR|=LCD_E;
}

//----------------------------------------
void clr_LCD_screen0(uint8 Bselect_area)////// clear  the LCD_screen
{

  unsigned char i,j;
  if(Bselect_area)
   {
   IO0CLR|=LCD_CS2;
   IO0SET|=LCD_CS1;   
   
   }
  else
   {
   IO0CLR|=LCD_CS1;
   IO0SET|=LCD_CS2;
   
   }
  lcd_delay(40);   
   for (i=0;i<8;i++)         
   {
    write_LCD_comd1(SET_X_ADDRESS,i);//set the page address
	write_LCD_comd1(SET_Y_ADDRESS,0);//set the list address
    for (j=0;j<64;j++)
      {	 
      write_LCD_comd0(0);  
      }
   }
}

void clr_LCD_screen(void)
{

 clr_LCD_screen0(1);
 clr_LCD_screen0(0);

}  
//===========================================================================

void init_LCD(void)
{
  IO0SET|=LCD_CS2;
  lcd_delay(40); 
  IO0CLR|=LCD_CS1;
  lcd_delay(40); 
  write_LCD_comd1(DISPLAY_ON,0);  
  write_LCD_comd1(DISPLAY_START_LINE,0);
  clr_LCD_screen0(0);
  lcd_delay(40); 
  IO0SET|=LCD_CS1;
  lcd_delay(40); 
  IO0CLR|=LCD_CS2;
  write_LCD_comd1(DISPLAY_ON,0);  
  write_LCD_comd1(DISPLAY_START_LINE,0);
  clr_LCD_screen0(1);
}

//*******************************************************************************
//function:     
//description:  picture modle 
//               
//parameter:   *word_tab---the first address of the word modle in code area         
//             word_position_x,word_position_y---the coordinate of the word or 
//                                               picture corresponding to the character
//                                               word in the screen                   
//             m---the dots number per row    ex. 8,16,24,32....
//             n---the dots number per list   ex. 8,16,24,32....                            
//return value:                                                             
//*******************************************************************************
//                             首址             (---)起始行         (|)  起始列             宽度      高度
void show_picture(uint8 const *word_tab,uint8 word_position_x,uint8 word_position_y,uint8 m,uint8 n)
{
  uint8 const *temp_pointer;
  uint8 i,j;
  uint8 Bchange_area;
 
  temp_pointer=word_tab;
  for (i=0;i<n/8;i++)         
   {
    if(word_position_y<64&&word_position_y+m>64)
     Bchange_area=1;
    else
     Bchange_area=0;

    if(word_position_y/64)
     {
      IO0CLR|=LCD_CS2;
      IO0SET|=LCD_CS1;
	
     }
    else
     {
      IO0CLR|=LCD_CS1;
      IO0SET|=LCD_CS2;
	
     }
    lcd_delay(40);
    write_LCD_comd1(SET_X_ADDRESS,word_position_x/8+i);//写地址命令
	write_LCD_comd1(SET_Y_ADDRESS,word_position_y%64);
    for (j=0;j<m;j++)
      {
	   if(Bchange_area)
	   {
	    
        if(word_position_y+j>=64)
         {
         
          Bchange_area=0;
	      IO0CLR|=LCD_CS2;
          IO0SET|=LCD_CS1;
		  write_LCD_comd1(SET_X_ADDRESS,word_position_x/8+i);
          write_LCD_comd1(SET_Y_ADDRESS,0); 	
	     }
	   }
       write_LCD_comd0(*temp_pointer++);
       //--------------------
      // lcd_delay(40);
      // write_LCD_comd1(SET_X_ADDRESS,word_position_x/8+i);
      // write_LCD_comd1(SET_Y_ADDRESS,0); 
     //  rdat=Read_LCD();
     //  UART0_SendByte(rdat);
       
       //----------------
      }
   } 
}


void read_test(void)
{ uint8 rdat;
show_dot(0,0);
write_LCD_comd1(SET_X_ADDRESS,0);
write_LCD_comd1(SET_Y_ADDRESS,0);
rdat=Read_LCD();
 UART0_SendByte(rdat);

}
void show_picture_n(uint8 const *word_tab,uint8 word_position_x,uint8 word_position_y,uint8 m,uint8 n)
{
  uint8 const *temp_pointer;
  uint8 i,j;
  uint8 Bchange_area;
  temp_pointer=word_tab;
  for (i=0;i<n/8;i++)         
   {
    if(word_position_y<64&&word_position_y+m>64)
     Bchange_area=1;
    else
     Bchange_area=0;
    if(word_position_y/64)
     {
      IO0CLR|=LCD_CS2;
      IO0SET|=LCD_CS1;
	
     }
    else
     {
      IO0CLR|=LCD_CS1;
      IO0SET|=LCD_CS2;
	 }
    lcd_delay(40);
    write_LCD_comd1(SET_X_ADDRESS,word_position_x/8+i);
	write_LCD_comd1(SET_Y_ADDRESS,word_position_y%64);
    for (j=0;j<m;j++)
      {
	   if(Bchange_area)
	   {
	    
        if(word_position_y+j>=64)
         {
          Bchange_area=0;
	      IO0CLR|=LCD_CS2;
          IO0SET|=LCD_CS1;
	      lcd_delay(40);
		  write_LCD_comd1(SET_X_ADDRESS,word_position_x/8+i);
          write_LCD_comd1(SET_Y_ADDRESS,0); 	
	     }
	   }
       write_LCD_comd0(~(*temp_pointer++)); 
      }
   }
}   

void erase_picture(uint8 word_position_x,uint8 word_position_y,uint8 m,uint8 n)
{
  uint8 i,j;
  uint8 Bchange_area;
  lcd_delay(40); 

  for (i=0;i<n/8;i++)         
   {
    if(word_position_y<64&&word_position_y+m>64)
     Bchange_area=1;
    else
     Bchange_area=0;
    if(word_position_y/64)
     {
      IO0CLR|=LCD_CS2;
      IO0SET|=LCD_CS1;
	
     }
    else
     {
      IO0CLR|=LCD_CS1;
      IO0SET|=LCD_CS2;
	
     }
     lcd_delay(40);
    write_LCD_comd1(SET_X_ADDRESS,word_position_x/8+i);
	write_LCD_comd1(SET_Y_ADDRESS,word_position_y%64);

    lcd_delay(10);
     
    for (j=0;j<m+1;j++)
      {
	   if(Bchange_area)
	   {
	    
        if(word_position_y+j>=64)
         {
          Bchange_area=0;
	      IO0CLR|=LCD_CS2;
          IO0SET|=LCD_CS1;
	      lcd_delay(10);
		  write_LCD_comd1(SET_X_ADDRESS,word_position_x/8+i);
          write_LCD_comd1(SET_Y_ADDRESS,0); 	
	     }
	   }
       write_LCD_comd0(0); 
      }     
   }
}

//在图形方式下,绘点子程序。该程序在第row(0-63)行、第col(0-127)列绘点，行、列坐标均以点为单位
void show_dot(uint8 word_position_x,uint8 word_position_y)
{
   if(word_position_y/64)
     {
      IO0CLR|=LCD_CS2;
      IO0SET|=LCD_CS1;
     }
    else
     {
      IO0CLR|=LCD_CS1;
      IO0SET|=LCD_CS2;
     }
    lcd_delay(40);
    write_LCD_comd1(SET_X_ADDRESS,word_position_x/8);
	write_LCD_comd1(SET_Y_ADDRESS,word_position_y%64);
    write_LCD_comd0(0x57);
}
//画线子程序:为了回避复杂的浮点运算,采用了整数数字微分的方法
//以(x行,y列)为起点,以(x1行,y1列)为终点画一条直线
void DrawLines(int8 x,int8 y,int8 x1,int8 y1) 
{
	int dx,dy,err = 0;
	if(y != y1)
	{
		if(y1 < y) //这个判断语句保证了y1>=y这个前提
		{
			dx = y1; dy = x1;
			y1 = y;  x1 = x;
			y = dx;  x = dy;
		}
		dy = y1 - y;
		dx = x1 - x;
		if((x1 >= x)&&((y1 - y) <= (x1 - x)))
		{
			for(;x != x1;)
			{
				if(err < 0)
				{
					show_dot(x + 1,y);
					x += 1;
					err += dy;
				}
				else
				{
					show_dot(x + 1,y + 1);
					x += 1;
					y += 1;
					err += (dy - dx);
				}
			}
		}
		else
			if((x1 >= x)&&((y1 - y) > (x1 - x)))
			{
				for(;y != y1;)
				{
					if(err < 0)
					{
						show_dot(x + 1,y + 1);
						x += 1;
						y += 1;
						err += (dy - dx);
					}
					else
					{
						show_dot(x,y + 1);
						y += 1;
						err -= dx;
					}
				}
			}
			else
				if((x1 < x)&&((y1 - y) <= (x - x1)))
				{
					for(;x != x1;)
					{
						if(err < 0)
						{
							show_dot(x - 1,y);
							x -= 1;
							err += dy;
						}
						else
						{
							show_dot(x - 1,y + 1);
							x -= 1;
							y += 1;
							err += (dy + dx);
						}
					}
				}
				else
					if((x1 < x)&&((y1 - y) > (x1 - x)))
					{
						for(;y != y1;)