/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga

    slouken@libsdl.org

*/

#include "SDL_config.h"

#include "SDL_thread.h"

#include "SDL_timer.h"

#include "SDL_error.h"

#include "../SDL_timer_c.h"

#include <nds.h>

#define timers2ms(tlow,thigh)(tlow | (thigh<<16)) >> 5

void SDL_StartTicks(void)

{

   TIMER0_DATA=0; 

   TIMER1_DATA=0; 

   TIMER0_CR=TIMER_ENABLE|TIMER_DIV_1024; 

   TIMER1_CR=TIMER_ENABLE|TIMER_CASCADE;

}

Uint32 SDL_GetTicks(void)

{

	return timers2ms(TIMER0_DATA, TIMER1_DATA);

}

void SDL_Delay(Uint32 ms)

{

   Uint32 now; 

   now=timers2ms(TIMER0_DATA, TIMER1_DATA); 

   while((Uint32)timers2ms(TIMER0_DATA, TIMER1_DATA)<now+ms); 

}

/* This is only called if the event thread is not running */

int SDL_SYS_TimerInit(void)

{

	return 0;

}

void SDL_SYS_TimerQuit(void)

{

}

int SDL_SYS_StartTimer(void)

{

	SDL_SetError("Timers not implemented on NDS");

	return -1;

}

void SDL_SYS_StopTimer(void)

{

}