xtest05_2.c

AT91sam7s 256 B/D example

/* ========================================================================== */
/*	   Xtest05_2.c : Visiting Count on GLCD using Random Number(1)	      */
/* ========================================================================== */
/*			  Designed and programmed by Duck-Yong Yoon in 2007.  */

#include <stdlib.h>
#include "AT91SAM7S256.h"
#include "lib_AT91SAM7S256.h"
#include "OK7S256ads.h"
#include "OK7S256GLCD.h"

int main(void)
{
  unsigned int i, j, seed, random, count, x, y, visit_flag;
  unsigned int table[8][20];			// visiting room

  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," Visiting Count ");
  Beep();

  for(i = 0; i <= 7; i++)			// clear visiting room
    for(j = 0; j <= 19; j++)
      table[i][j] = 0;
  visit_flag = 0;
  x = 4;                                        // starting position
  y = 10;

  seed = 1000;					// make seed of random number
  srand(seed);			               	// initialize random number

  while(visit_flag == 0)
    { random = rand();				// get random number

      if(random <= 0x1FFFFFFF)			// 0x00000000 - 0x1FFFFFFF
        { if(y != 19)
            { y++; table[x][y] += 1; } }
      else if(random <= 0x3FFFFFFF)		// 0x20000000 - 0x3FFFFFFF
        { if(y != 0)
            { y--; table[x][y] += 1; } }
      else if(random <= 0x5FFFFFFF)		// 0x40000000 - 0x5FFFFFFF
        { if(x != 7)
            { x++; table[x][y] += 1; } }
      else					// 0x60000000 - 0x7FFFFFFF
        { if(x != 0)
            { x--; table[x][y] += 1; } }

      for(i = 0; i <= 7; i++)			// display visiting count
        for(j = 0; j <= 19; j++)
          { count = table[i][j];
            if(count >= 62) count = '*';
            else if(count >= 36) count = count - 36 + 'a';
            else if(count >= 10) count = count - 10 + 'A';
            else count = count + '0';
            GLCD_xy(i, j);
            GLCD_English(0,count);
          }
      Delay_ms(100);

      visit_flag = 1;				// check end
      for(i = 0; i <= 7; i++)
        for(j = 0; j <= 19; j++)
          if(table[i][j] == 0)
            visit_flag = 0;
    }

  Beep();                                       // OK sound
  LCD_string(0xC0,"  Visiting OK!  ");		// OK message
  while(1);
}