xtest07_4.c

AT91sam7s 256 B/D example

/* ========================================================================== */
/*	Xtest07_4.c : Real Number Display without and with Sign on GLCD       */
/* ========================================================================== */
/*			  Designed and programmed by Duck-Yong Yoon in 2007.  */

#include <math.h>
#include "AT91SAM7S256.h"
#include "lib_AT91SAM7S256.h"
#include "OK7S256ads.h"
#include "OK7S256Korean.h"

void GLCD_1d1(double number)			/* floating-point number x.x */
{ unsigned int i, j;

  j = (int)(number*10. + 0.5);
  i = j / 10;					// 10^0
  GLCD_English(0,i + '0');
  GLCD_English(0,'.');
  i = j % 10;					// 10^-1
  GLCD_English(0,i + '0');
}

void GLCD_s1d1(double number)			/* floating-point number +x.x */
{
  if(number >= 0.)				// sign
    GLCD_English(0,'+');
  else
    GLCD_English(0,'-');

  GLCD_1d1(fabs(number));			// magnitude
}

void GLCD_2d2(double number)			/* floating-point number xx.xx */
{ unsigned int i, j;

  j = (int)(number*100. + 0.5);
  i = j / 1000;					// 10^1
  if(i == 0) GLCD_English(0,' ');
  else       GLCD_English(0,i + '0');

  j = j % 1000;					// 10^0
  i = j / 100;
  GLCD_English(0,i + '0');
  GLCD_English(0,'.');

  j = j % 100;					// 10^-1
  i = j / 10;
  GLCD_English(0,i + '0');

  i = j % 10;					// 10^-2
  GLCD_English(0,i + '0');
}

void GLCD_s2d2(double number)			/* floating-point number +xx.xx */
{
  if(number >= 0.)				// sign
    GLCD_English(0,'+');
  else
    GLCD_English(0,'-');

  GLCD_2d2(fabs(number));			// magnitude
}

int main(void)
{
  double i, j;
  double x, y;

  MCU_initialize();				// initialize AT91SAM7S256 & kit
  Delay_ms(50);					// wait for system stabilization
  LCD_initialize();				// initialize text LCD
  GLCD_clear();		               		// initialize GLCD screen

  LCD_string(0x80,"Graphic LCD Test");          // display title on text LCD
  LCD_string(0xC0,"  Real Number   ");

  while(1)
    { GLCD_string(0,0,1," 何龋 绝绰 角荐 ");	// multiplication without sign
      GLCD_string(1,0,0,"                ");
      GLCD_string(2,0,0,"0.0 x 0.0 =00.00");
      GLCD_string(3,0,0,"                ");

      Beep();
      for(i = 1.1; i <= 9.9; i += 1.1)		// multiplication without sign
        for(j = 1.1; j <= 9.9; j += 1.1)
          { GLCD_xy(2,0); GLCD_1d1(i);		// display multiplicand
            GLCD_xy(2,6); GLCD_1d1(j);		// display multiplier
            GLCD_xy(2,11); GLCD_2d2(i*j);	// display multiplication
            Delay_ms(1000);
          }

      GLCD_string(0,0,1," 何龋 乐绰 角荐 ");	// multiplication with sign
      GLCD_string(1,0,0,"                ");
      GLCD_string(2,0,0," (+0.0)x(+0.0)  ");
      GLCD_string(3,0,0,"   = +00.00     ");

      Beep();
      for(x = -9.9; x <= +9.9; x += 1.1)	// multiplication with sign
        for(y = -9.9; y <= +9.9; y += 1.1)
          { GLCD_xy(2,2); GLCD_s1d1(x);		// display multiplicand
            GLCD_xy(2,9); GLCD_s1d1(y);		// display multiplier
            GLCD_xy(3,5); GLCD_s2d2(x*y);	// display multiplication
            Delay_ms(1000);
          }
    }
}