diff options
| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2007-10-06 08:58:52 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2007-10-06 08:58:52 +0000 |
| commit | d6d799ed48f8193bee286187132221f831726a07 (patch) | |
| tree | 928f9db3dbb76cfdef92405635b8d1b7885e5b5e /src/lib | |
| parent | ff4dd3f8f0f95652f754ab869b136d31d671ac51 (diff) | |
| download | ChibiOS-d6d799ed48f8193bee286187132221f831726a07.tar.gz ChibiOS-d6d799ed48f8193bee286187132221f831726a07.tar.bz2 ChibiOS-d6d799ed48f8193bee286187132221f831726a07.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@39 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/evtimer.c | 68 | ||||
| -rw-r--r-- | src/lib/evtimer.h | 65 |
2 files changed, 133 insertions, 0 deletions
diff --git a/src/lib/evtimer.c b/src/lib/evtimer.c new file mode 100644 index 000000000..212c8f124 --- /dev/null +++ b/src/lib/evtimer.c @@ -0,0 +1,68 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file evtimer.c
+ * @{
+ * Event Timer, this timer generates an event at regular intervals. The
+ * listening threads can use the event to perform time related activities.
+ * Multiple threads can listen to the same timer.
+ */
+
+#include <ch.h>
+
+#include "evtimer.h"
+
+static void tmrcb(void *p) {
+ EvTimer *etp = p;
+
+ chVTSetI(&etp->et_vt, etp->et_interval, tmrcb, etp);
+}
+
+/**
+ * Starts the timer, if the timer was already running then the function has
+ * no effect.
+ * @param etp pointer to an initialized \p EvTimer structure.
+ */
+void evtStart(EvTimer *etp) {
+
+ chSysLock();
+
+ if (!etp->et_vt.vt_func)
+ chVTSetI(&etp->et_vt, etp->et_interval, tmrcb, etp);
+
+ chSysUnlock();
+}
+
+/**
+ * Stops the timer, if the timer was already stopped then the function has
+ * no effect.
+ * @param etp pointer to an initialized \p EvTimer structure.
+ */
+void evtStop(EvTimer *etp) {
+
+ chSysLock();
+
+ if (etp->et_vt.vt_func)
+ chVTResetI(&etp->et_vt);
+
+ chSysUnlock();
+}
+
+/** @} */
diff --git a/src/lib/evtimer.h b/src/lib/evtimer.h new file mode 100644 index 000000000..43b0374ee --- /dev/null +++ b/src/lib/evtimer.h @@ -0,0 +1,65 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file evtimer.h
+ * @{
+ * Event Timer definitions.
+ * @see evtimer.c
+ */
+
+#ifndef _EVTIMER_H_
+#define _EVTIMER_H_
+
+
+typedef struct {
+ VirtualTimer et_vt;
+ EventSource et_es;
+ t_time et_interval;
+} EvTimer;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void evtStart(EvTimer *etp);
+ void evtStop(EvTimer *etp);
+#ifdef __cplusplus
+}
+#endif
+
+/**
+ * Initializes an \p EvTimer structure.
+ */
+#define evtInit(et, i) (chEvtInit(&(etp)->et_es), \
+ (etp)->et_vt.vt_func = NULL, \
+ (etp)->et_interval = (i))
+
+/**
+ * Registers the invoking thread as listener on the timer event.
+ */
+#define evtRegister(etp, el, eid) chEvtRegister(&(etp)->et_es, el, eid)
+
+/**
+ * Unregisters the invoking thread as listener on the timer event.
+ */
+#define evtUnregister(etp, el) chEvtUnregister(&(etp)->et_es, el)
+
+#endif /* _EVTIMER_H_ */
+
+/** @} */
|