/* 
   Using the 8051SBC as the terminal for time setting the Realtime Controller
   The onboard two button switches are used to set Hour and Min
   Copyright (C) 2006-2007 Wichit Sirichote, kswichit@kmitl.ac.th
*/

#include <stdio.h>
#include <reg52.h>

xdata char GPIO2 _at_ 0x200;


char *Puts(char *str);
InitLcd(void);
goto_xy(char x,char y);
void putch_lcd(char ch);

char hour_press, min_press;


print_text()
{
   char buffer[10];
   if(RI)
   {
   gets(buffer,10);
   goto_xy(0,1);
   Puts(buffer);
   }
}

get_character()
{
   char c;
   if (RI)
   {
     c = getchar();
	 if(c < ' ') goto_xy(0,1);
	   putch_lcd(c);

   }
}

set_hour()
{
  if((GPIO2 & 0x10)==0 && hour_press == 0)
   {
    putchar('h');
	hour_press=1;
	}
}

set_min()
{
  if((GPIO2 & 0x20)==0 && (min_press == 0))
   {
    putchar('m');
	min_press = 1;
	}
}

key_released()
{
  if((GPIO2 & 0xf0) == 0xf0)
    {
	min_press=0;
	hour_press = 0;
	}
}


main()
{

  InitLcd();
  Puts("RTC TERMINAL");
  hour_press = min_press = 0;
  RI = 0;

 while(1)
 {
 get_character();
 set_hour();
 set_min();
 key_released();
 }

}