1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2012 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken (at) libsdl.org 21 */ 22 #include "SDL_config.h" 23 24 #include "SDL_thread.h" 25 #include "SDL_timer.h" 26 #include "SDL_error.h" 27 #include "../SDL_timer_c.h" 28 29 #include <nds.h> 30 31 #define timers2ms(tlow,thigh)(tlow | (thigh<<16)) >> 5 32 33 34 void SDL_StartTicks(void) 35 { 36 TIMER0_DATA=0; 37 TIMER1_DATA=0; 38 TIMER0_CR=TIMER_ENABLE|TIMER_DIV_1024; 39 TIMER1_CR=TIMER_ENABLE|TIMER_CASCADE; 40 } 41 42 Uint32 SDL_GetTicks(void) 43 { 44 return timers2ms(TIMER0_DATA, TIMER1_DATA); 45 } 46 47 void SDL_Delay(Uint32 ms) 48 { 49 Uint32 now; 50 now=timers2ms(TIMER0_DATA, TIMER1_DATA); 51 while((Uint32)timers2ms(TIMER0_DATA, TIMER1_DATA)<now+ms); 52 53 } 54 55 /* This is only called if the event thread is not running */ 56 int SDL_SYS_TimerInit(void) 57 { 58 return 0; 59 } 60 61 void SDL_SYS_TimerQuit(void) 62 { 63 } 64 65 int SDL_SYS_StartTimer(void) 66 { 67 SDL_SetError("Timers not implemented on NDS"); 68 return -1; 69 } 70 71 void SDL_SYS_StopTimer(void) 72 { 73 } 74
