xtest07_4k.c

来自「AT91sam7s 256 B/D example」· C语言 代码 · 共 78 行

/* ========================================================================== */
/*	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,"