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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2012 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)
{
}
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