lcd2478.c

广州致远电子的SmartArm2400出厂时的演示代码。

    int  dx_x2;
    int  dy_x2;
    int  di;
    
    dx = ix1 - ix0;                                                     /*  two pixel's offset          */
    dy = iy1 - iy0;
    
    if (dx > 0) {
        dx_sym = 1;                                                     /*  decide the increase size    */
    } else {
        if (dx < 0) {
            dx_sym = -1;
        } else {
            if (dy >= 0) {
                lcd_DrawVLine(ix0, iy0, iy1, uicolor);                  /*  dx==0,draw a vertical line  */
            } else {
                lcd_DrawVLine(ix0, iy1, iy0, uicolor);  
            }                
            return;
        }
    }
    
    if (dy > 0) {
        dy_sym = 1;
    } else {
        if (dy < 0) {
            dy_sym = -1;
        } else {
            if (dx >= 0) {
                lcd_DrawHLine(ix0, ix1, iy0, uicolor);                  /*  dy==0,Draw a horizontal line*/
            } else {
                lcd_DrawHLine(ix1, ix0, iy0, uicolor);
            }
            return;
        }
    }
    
    dx    = dx_sym * dx;                                                /*  get absolute value          */
    dy    = dy_sym * dy;
    
    dx_x2 = dx * 2;                                                     /*  double dx                   */
    dy_x2 = dy * 2;                                                     /*  double dy                   */
    
    /*
     *  dx >= dy, use x as benchmark
     */
    if (dx >= dy) {                                              
        di = dy_x2 - dx;
        
        while (ix0 != ix1) {
            lcd_SetPixel(ix0, iy0, uicolor);
            ix0 += dx_sym;
            
            if (di < 0) {
                di  += dy_x2;
            } else {
                di  += dy_x2 - dx_x2;
                iy0 += dy_sym;
            }
        }
        
        lcd_SetPixel(ix0, iy0, uicolor);                                  /*  display the last pixel      */
        
    } else {
       /*
        *  dx < dy, use y as benchmark
        */
        di = dx_x2 - dy;
        
        while (iy0 != iy1) {
            lcd_SetPixel(ix0, iy0, uicolor);
            iy0 += dy_sym;
            
            if (di < 0) {
                di  += dx_x2;
            } else {
                di  += dx_x2 - dy_x2;
                ix0 += dx_sym;
            }
        }
        
        lcd_SetPixel(ix0, iy0, uicolor);                                  /*  display the last pixel      */
    }
}    
 

/*********************************************************************************************************
** Function name :        lcd_DrawRect
** Function Description : Draw a rectangle 
** Input:                 ix0      x side coordinate of the first pixel
**                        iy0      y side coordinate of the first pixel
**                        ix1      x side coordinate of the last pixel
**                        iy1      y side coordinate of the last pixel
**                        uicolor  the color of the pixel 
** Output:                none
*********************************************************************************************************/
void lcd_DrawRect (int ix0, int iy0, int ix1, int iy1, unsigned int uicolor)
{
        lcd_DrawLine(ix0,iy0,ix1,iy0,uicolor);
        lcd_DrawLine(ix1,iy0,ix1,iy1,uicolor);
        lcd_DrawLine(ix1,iy1,ix0,iy1,uicolor);
        lcd_DrawLine(ix0,iy1,ix0,iy0,uicolor);           
}   


/*********************************************************************************************************
** Function name :        lcd_FillRect
** Function Description : Fill a rectangle 
** Input:                 ix0      x side coordinate of the first pixel
**                        iy0      y side coordinate of the first pixel
**                        ix1      x side coordinate of the last pixel
**                        iy1      y side coordinate of the last pixel
**                        uicolor  the color of the pixel
** Output:                none
*********************************************************************************************************/
void lcd_FillRect (int ix0, int iy0, int ix1, int iy1, unsigned int uicolor)
{
    int i;
    
    if (iy1 > iy0) {
        for (i = iy0; i <= iy1; i++) {
            lcd_DrawLine(ix0, i, ix1, i, uicolor);
        }
    } else {
        for (i = iy0; i >= iy1; i--) {
            lcd_DrawLine(ix0, i, ix1, i, uicolor);
        }
    }
            
}  



#if (HWORDMODE == 1)
/*********************************************************************************************************
** Function name :        lcd_DrawBmp
** Function Description : Draw a bmp 
** Input:                 ix0     x side coordinate of the first pixel
**                        iy0     y side coordinate of the first pixel
**                        iwidth  x side width
**                        ilength y side length
**                        pucBmp  the bmp array pointer
** Output:                none
*********************************************************************************************************/
void lcd_DrawBmp (int ix0, 
                  int iy0, 
                  int iwidth, 
                  int ilength, 
                  unsigned short *pucBmp)
{
    int ix, iy;
    unsigned int uicolor;
    
    for (iy = iy0; iy < ilength + iy0; iy++) {
        for (ix = ix0; ix < iwidth + ix0; ix++) {
            uicolor = *pucBmp++;
            lcd_SetPixel(ix, iy, uicolor);
        }
    }
            
}


#else
/*********************************************************************************************************
** Function name :        lcd_DrawBmp
** Function Description : Draw a bmp 
** Input:                 ix0     x side coordinate of the first pixel
**                        iy0     y side coordinate of the first pixel
**                        iwidth  x side width
**                        ilength y side length
**                        pucBmp  the bmp array pointer
** Output:                none
*********************************************************************************************************/
void lcd_DrawBmp (int ix0, 
                  int iy0, 
                  int iwidth, 
                  int ilength, 
                  unsigned char *pucBmp)
{
    int ix, iy;
    unsigned int uicolor;
    
    for (iy = iy0; iy < ilength + iy0; iy++) {
        for (ix = ix0; ix < iwidth + ix0; ix++) {
            uicolor = *(pucBmp + 1) | (*(pucBmp) << 8);
            lcd_SetPixel(ix, iy, uicolor);
            pucBmp += 2;
        }
    }
            
}

#endif
/*********************************************************************************************************
** Function name :        delay_Ns
** Function Description : delay time 
** Input:                 idly   the necessary time
** Output:                none
*********************************************************************************************************/                                               
void delay_Ns (int idly)
{
    int i;
    
    for(; idly > 0; idly--) {
        for (i = 0; i < 5000; i++);
    }
}