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/*
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio.
This file is part of ChibiOS.
ChibiOS 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 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.h
* @brief Time Measurement module macros and structures.
*
* @addtogroup time_measurement
* @{
*/
#ifndef CHTM_H
#define CHTM_H
#if (CH_CFG_USE_TM == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Module constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Module pre-compile time settings. */
/*===========================================================================*/
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if PORT_SUPPORTS_RT == FALSE
#error "CH_CFG_USE_TM requires PORT_SUPPORTS_RT"
#endif
/*===========================================================================*/
/* Module data structures and types. */
/*===========================================================================*/
/**
* @brief Type of a time measurement calibration data.
*/
typedef struct {
/**
* @brief Measurement calibration value.
*/
rtcnt_t offset;
} tm_calibration_t;
/**
* @brief Type of a Time Measurement object.
* @note The maximum measurable time period depends on the implementation
* of the realtime counter and its clock frequency.
* @note The measurement is not 100% cycle-accurate, it can be in excess
* of few cycles depending on the compiler and target architecture.
* @note Interrupts can affect measurement if the measurement is performed
* with interrupts enabled.
*/
typedef struct {
rtcnt_t best; /**< @brief Best measurement. */
rtcnt_t worst; /**< @brief Worst measurement. */
rtcnt_t last; /**< @brief Last measurement. */
ucnt_t n; /**< @brief Number of measurements. */
rttime_t cumulative; /**< @brief Cumulative measurement. */
} time_measurement_t;
/*===========================================================================*/
/* Module macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void _tm_init(void);
void chTMObjectInit(time_measurement_t *tmp);
NOINLINE void chTMStartMeasurementX(time_measurement_t *tmp);
NOINLINE void chTMStopMeasurementX(time_measurement_t *tmp);
NOINLINE void chTMChainMeasurementToX(time_measurement_t *tmp1,
time_measurement_t *tmp2);
#ifdef __cplusplus
}
#endif
/*===========================================================================*/
/* Module inline functions. */
/*===========================================================================*/
#endif /* CH_CFG_USE_TM == TRUE */
#endif /* CHTM_H */
/** @} */
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