| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 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@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 | } |