print_method.c

对pxa255内置lcd控制器编程来实现字符及图像的显示

#define LCD_LCCR0  (*(volatile unsigned long *)(0x44000000))
#define LCD_FDADR0 (*(volatile unsigned long *)(0x44000200))
#define LCD_FSADR0 (*(volatile unsigned long *)(0xa0300004))
#define LCD_LCSR   (*(volatile unsigned long *)(0x44000038))
extern char hzk16[];

void screen_clean(int color)
{
 
 long int i,fill_color ;
 i = 0x96000/4;
 fill_color = 0x111100*color;
 for(;i>0;i--) 
  (*(volatile unsigned long int *)(0xa0500000 + i*4)) = fill_color; 
}


void disable_lcd(void)
{
  LCD_LCCR0 = LCD_LCCR0 | 0x0400;
 
}


void enable_lcd(void)
{
  ;LCD_FDADR0 = 0xa0300000;
  ;LCD_FSADR0 = 0xa0500000;
  ;LCD_LCSR = 0;
  LCD_LCCR0 = 0x003008f8;
  LCD_LCCR0 = LCD_LCCR0 | 0x01;
  
}


void lcd_put_pixel(int x,int y, int c)
{
       long int base_addr;
       base_addr = 0xa0500000; 
    if(x<1280 && y<480)
  		(*((unsigned int *)(base_addr+y*1280+x*2))) = c;
}


void memcpy(char *q1,char *q2,int n)
{
    int i;
    for(i=0;i<n;i++)
    *(q1+i)=*(q2+i);
}

void print_hzk16(int x,int y,char *s,int colour)
{
    char buffer[32];							
 	int i,j,k;
 	unsigned char qh,wh;
 	unsigned long location;
 	while(*s)
  	{
   		qh=*s-0xa0;								
   		wh=*(s+1)-0xa0;							
   		location=(94*(qh-1)+(wh-1))*32L;		
   		memcpy(buffer, &hzk16[location], 32);	
		for(i=0;i<16;i++)						
		{
    		for(j=0;j<2;j++)					
			{
     			for(k=0;k<8;k++)				
				{      if(((buffer[i*2+j]>>(7-k)) & 0x1) != 0)			
       					lcd_put_pixel(x+8*j+k,y+i,colour); 
				}
			}
		}
   		s+=2;												
   		x+=32;												
  	}
}