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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-08-10 14:51:16 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-08-10 14:51:16 +0000 |
| commit | a1435e018bfc9919cb76b1356509ecc883767fb4 (patch) | |
| tree | b82f74e9eee194c8b04ba4a0dd0b88810813caf8 /os/rt/src/chtm.c | |
| parent | eb7a1a15b23341693864c6fc13ac5eab5c1d6122 (diff) | |
| download | ChibiOS-a1435e018bfc9919cb76b1356509ecc883767fb4.tar.gz ChibiOS-a1435e018bfc9919cb76b1356509ecc883767fb4.tar.bz2 ChibiOS-a1435e018bfc9919cb76b1356509ecc883767fb4.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6123 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/rt/src/chtm.c')
| -rw-r--r-- | os/rt/src/chtm.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/os/rt/src/chtm.c b/os/rt/src/chtm.c new file mode 100644 index 000000000..24239e0e2 --- /dev/null +++ b/os/rt/src/chtm.c @@ -0,0 +1,155 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011,2012,2013 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 chtm.c
+ * @brief Time Measurement module code.
+ *
+ * @addtogroup time_measurement
+ * @details Time Measurement APIs and services.
+ * @{
+ */
+
+#include "ch.h"
+
+#if CH_CFG_USE_TM || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Module local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module local types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module local functions. */
+/*===========================================================================*/
+
+static inline void tm_stop(time_measurement_t *tmp,
+ rtcnt_t now,
+ rtcnt_t offset) {
+
+ tmp->n++;
+ tmp->last = now - tmp->last - offset;
+ tmp->cumulative += (rttime_t)tmp->last;
+ if (tmp->last > tmp->worst)
+ tmp->worst = tmp->last;
+ else if (tmp->last < tmp->best)
+ tmp->best = tmp->last;
+}
+
+/*===========================================================================*/
+/* Module exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Initializes the time measurement unit.
+ *
+ * @init
+ */
+void _tm_init(void) {
+ time_measurement_t tm;
+
+ /* Time Measurement subsystem calibration, it does a null measurement
+ and calculates the call overhead which is subtracted to real
+ measurements.*/
+ ch.measurement_offset = 0;
+ chTMObjectInit(&tm);
+ chTMStartMeasurementX(&tm);
+ chTMStopMeasurementX(&tm);
+ ch.measurement_offset = tm.last;
+}
+
+/**
+ * @brief Initializes a @p TimeMeasurement object.
+ *
+ * @param[out] tmp pointer to a @p TimeMeasurement structure
+ *
+ * @init
+ */
+void chTMObjectInit(time_measurement_t *tmp) {
+
+ tmp->best = (rtcnt_t)-1;
+ tmp->worst = (rtcnt_t)0;
+ tmp->last = (rtcnt_t)0;
+ tmp->n = (ucnt_t)0;
+ tmp->cumulative = (rttime_t)0;
+}
+
+/**
+ * @brief Starts a measurement.
+ * @pre The @p time_measurement_t structure must be initialized.
+ *
+ * @param[in,out] tmp pointer to a @p TimeMeasurement structure
+ *
+ * @xclass
+ */
+NOINLINE void chTMStartMeasurementX(time_measurement_t *tmp) {
+
+ tmp->last = chSysGetRealtimeCounterX();
+}
+
+/**
+ * @brief Stops a measurement.
+ * @pre The @p time_measurement_t structure must be initialized.
+ *
+ * @param[in,out] tmp pointer to a @p time_measurement_t structure
+ *
+ * @xclass
+ */
+NOINLINE void chTMStopMeasurementX(time_measurement_t *tmp) {
+
+ tm_stop(tmp, chSysGetRealtimeCounterX(), ch.measurement_offset);
+}
+
+#endif /* CH_CFG_USE_TM */
+
+/**
+ * @brief Stops a measurement and chains to the next one using the same time
+ * stamp.
+ *
+ * @param[in,out] tmp1 pointer to the @p time_measurement_t structure to be
+ * stopped
+ * @param[in,out] tmp2 pointer to the @p time_measurement_t structure to be
+ * started
+ *
+ *
+ * @xclass
+ */
+NOINLINE void chTMChainMeasurementToX(time_measurement_t *tmp1,
+ time_measurement_t *tmp2) {
+
+ /* Starts new measurement.*/
+ tmp2->last = chSysGetRealtimeCounterX();
+
+ /* Stops previous measurement using the same time stamp.*/
+ tm_stop(tmp1, tmp2->last, 0);
+}
+
+/** @} */
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