This kernel module contains the hardware independent system timer routines.
* * $Log: timer.c,v $ * Revision 1.31 2006/07/26 11:16:12 haraldkipp * NutSleep() didn't take the difference between timer creation time and * last timer elapsed processing into account. This may resulted in shorter * sleep time. Thanks to Andras Albert for this fix. * * Revision 1.30 2006/06/28 14:42:28 haraldkipp * Event and timer handling re-design, again. * Time-out timers are now released early. * The timer list is now double linked to reduce removal time. * Internally timeout condition is now flagged by setting the timer handle * to SIGNALED. * The documentation had been updated. * NUTDEBUG code requires some updates. Temporarly removed. * LGPL copyright removed after all the initial sources had been finally * replaced by BSDL'ed code. * Variable nut_ticks_resume is used in NutTimerProcessElapsed() only. Moved * there. * * Revision 1.29 2006/01/26 15:34:49 going_nuts * adapted to new interrupt handling scheme for unix emulation * now uses Unix timer and runs without interrupts unless you emulate other hardware * * Revision 1.28 2005/08/03 14:43:54 freckle * made nut_tick public * * Revision 1.27 2005/07/26 16:01:19 haraldkipp * Cygwin added. * Platform dependent code is now located in arch/(target)/ostimer.c. * * Revision 1.26 2005/07/21 15:31:04 freckle * rewrote timer handling. timer interrupt handler only updates nut_ticks now * * Revision 1.25 2005/07/20 09:26:34 haraldkipp * Use native heap calls to avoid dependencies * * Revision 1.24 2005/07/15 14:44:46 freckle * corrected NutGetMillis, update comments * * Revision 1.23 2005/07/12 16:37:02 freckle * made NutTimerInsert public * * Revision 1.22 2005/07/12 16:26:04 freckle * extracted timer creation from NutTimerStartTicks into NutTimerCreate * * Revision 1.21 2005/07/12 15:23:40 olereinhardt * Added NULL pointer checks in NutTimerProcessElapsed(void) * * Revision 1.20 2005/07/12 15:10:43 freckle * removed critical section in NutSleep * * Revision 1.19 2005/07/07 12:43:49 freckle * removed stopped timers in NutTimerProcessElapsed * * Revision 1.18 2005/06/14 19:04:44 freckle * Fixed NutTimerStopAsync(): it now removes callback ptr => timer stop * * Revision 1.17 2005/06/12 16:53:01 haraldkipp * Major redesing to reduce interrupt latency. * Much better seperation of hardware dependent and independent parts. * * Revision 1.16 2005/05/27 17:30:27 drsung * Platform dependant files were moved to /arch directory. * * Revision 1.15 2005/02/21 12:37:57 phblum * Removed tabs and added semicolons after NUTTRACER macros * * Revision 1.14 2005/02/16 19:53:27 haraldkipp * Ready-to-run queue handling removed from interrupt context. * * Revision 1.13 2005/02/10 07:06:51 hwmaier * Changes to incorporate support for AT90CAN128 CPU * * Revision 1.12 2005/01/24 22:34:40 freckle * Added new tracer by Phlipp Blum <blum@tik.ee.ethz.ch> * * Revision 1.11 2005/01/19 17:59:43 freckle * Improved interrupt performance by reducing some critical section * * Revision 1.10 2005/01/13 18:51:23 haraldkipp * Moved ms62_5 counter to nutinit.c to make sure this is located in internal * RAM (AVR platforms). This fixes the wrong baudrate bug for applications * occupying all internal RAM. * * Optimized some timer handling. * * Revision 1.9 2005/01/02 10:07:10 haraldkipp * Replaced platform dependant formats in debug outputs. * * Revision 1.8 2004/09/08 10:53:25 haraldkipp * os/timer.c * * Revision 1.7 2004/04/07 12:13:58 haraldkipp * Matthias Ringwald's *nix emulation added * * Revision 1.6 2004/03/19 09:05:12 jdubiec * Fixed format strings declarations for AVR. * * Revision 1.5 2004/03/16 16:48:45 haraldkipp * Added Jan Dubiec's H8/300 port. * * Revision 1.4 2004/02/01 18:49:48 haraldkipp * Added CPU family support * * Revision 1.3 2003/11/03 16:34:21 haraldkipp * New API returns system uptime in miliseconds * * Revision 1.2 2003/10/13 10:17:11 haraldkipp * Seconds counter added * * Revision 1.1.1.1 2003/05/09 14:41:55 haraldkipp * Initial using 3.2.1 * * Revision 1.24 2003/05/06 18:56:58 harald * Allow compilation without clock crystal * * Revision 1.23 2003/04/21 17:09:19 harald * *** empty log message *** * * Revision 1.22 2003/03/31 14:39:54 harald * *** empty log message *** * * Revision 1.21 2003/02/04 18:15:57 harald * Version 3 released * * Revision 1.20 2003/01/14 16:58:41 harald * Tick counter added. * * Revision 1.19 2002/10/29 15:37:55 harald * Some compilers refuse fixed crystal source * * Revision 1.18 2002/09/15 17:08:07 harald * *** empty log message *** * * Revision 1.17 2002/08/08 17:32:44 harald * Imagecraft support by Klaus Ummenhofer * * Revision 1.16 2002/06/26 17:29:45 harald * First pre-release with 2.4 stack * *
Functions | |
| void | NutTimerInit (void) |
| Initialize system timer. | |
| void | NutTimerInsert (NUTTIMERINFO *tn) |
| Insert a new timer in the global timer list. | |
| void | NutTimerProcessElapsed (void) |
| Process elapsed timers. | |
| NUTTIMERINFO * | NutTimerCreate (u_long ticks, void(*callback)(HANDLE, void *), void *arg, u_char flags) |
| Create a new system timer. | |
| HANDLE | NutTimerStartTicks (u_long ticks, void(*callback)(HANDLE, void *), void *arg, u_char flags) |
| Start a system timer. | |
| HANDLE | NutTimerStart (u_long ms, void(*callback)(HANDLE, void *), void *arg, u_char flags) |
| Start a system timer. | |
| void | NutSleep (u_long ms) |
| Temporarily suspends the current thread. | |
| void | NutTimerStop (HANDLE handle) |
| Stop a specified timer. | |
| u_long | NutGetTickCount (void) |
| Return the number of system timer ticks. | |
| u_long | NutGetSeconds (void) |
| Return the seconds counter value. | |
| u_long | NutGetMillis (void) |
| Return the milliseconds counter value. | |
Variables | |
| NUTTIMERINFO * | nutTimerList |
| Double linked list of all system timers. | |
| volatile u_long | nut_ticks |
| System tick counter. | |