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88 lines
3.0 KiB
C
88 lines
3.0 KiB
C
/**
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******************************************************************************
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* @addtogroup OpenPilot library
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* @brief These files contain the code for stopwatch handling.
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*
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* @file stopwatch.h
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2014.
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* @brief Generic pios_delay based stopwatch functions.
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* @see The GNU Public License (GPL) Version 3
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*
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _STOPWATCH_H
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#define _STOPWATCH_H
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#include <stdint.h>
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#include <pios_delay.h>
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/////////////////////////////////////////////////////////////////////////////
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// Global definitions
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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// Global Types
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/////////////////////////////////////////////////////////////////////////////
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typedef struct {
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uint32_t raw;
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uint32_t resolution;
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} stopwatch_t;
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/////////////////////////////////////////////////////////////////////////////
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// Prototypes
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/////////////////////////////////////////////////////////////////////////////
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static inline int32_t STOPWATCH_Init(uint32_t resolution, stopwatch_t *stopwatch)
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{
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stopwatch->raw = PIOS_DELAY_GetRaw();
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stopwatch->resolution = resolution;
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return 0; // no error
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}
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/////////////////////////////////////////////////////////////////////////////
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// ! Resets the stopwatch
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// ! \return < 0 on errors
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/////////////////////////////////////////////////////////////////////////////
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static inline int32_t STOPWATCH_Reset(stopwatch_t *stopwatch)
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{
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stopwatch->raw = PIOS_DELAY_GetRaw();
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return 0; // no error
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}
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/////////////////////////////////////////////////////////////////////////////
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// ! Returns current value of stopwatch
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// ! \return stopwatch value
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/////////////////////////////////////////////////////////////////////////////
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static inline uint32_t STOPWATCH_ValueGet(stopwatch_t *stopwatch)
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{
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uint32_t value = PIOS_DELAY_GetuSSince(stopwatch->raw);
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if (stopwatch > 1) {
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value = value / stopwatch->resolution;
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}
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return value;
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}
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/////////////////////////////////////////////////////////////////////////////
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// Export global variables
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/////////////////////////////////////////////////////////////////////////////
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#endif /* _STOPWATCH_H */
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