e14743d1 |
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 | } |