144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
/*
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* @brief Common stopwatch support
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2013
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* All rights reserved.
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*
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* @par
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* LPC products. This software is supplied "AS IS" without any warranties of
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* any kind, and NXP Semiconductors and its licensor disclaim any and
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* all warranties, express or implied, including all implied warranties of
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* merchantability, fitness for a particular purpose and non-infringement of
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* intellectual property rights. NXP Semiconductors assumes no responsibility
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* or liability for the use of the software, conveys no license or rights under any
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* patent, copyright, mask work right, or any other intellectual property rights in
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* or to any products. NXP Semiconductors reserves the right to make changes
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* in the software without notification. NXP Semiconductors also makes no
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* representation or warranty that such application will be suitable for the
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* specified use without further testing or modification.
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*
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* @par
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors' and its
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* licensor's relevant copyrights in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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*/
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#ifndef __STOPWATCH_H_
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#define __STOPWATCH_H_
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#include "cmsis.h"
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/** @defgroup Stop_Watch CHIP: Stopwatch primitives.
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* @ingroup CHIP_Common
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* @{
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*/
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/**
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* @brief Initialize stopwatch
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* @return Nothing
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*/
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void StopWatch_Init(void);
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/**
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* @brief Start a stopwatch
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* @return Current cycle count
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*/
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uint32_t StopWatch_Start(void);
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/**
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* @brief Returns number of ticks elapsed since stopwatch was started
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* @param startTime : Time returned by StopWatch_Start().
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* @return Number of ticks elapsed since stopwatch was started
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*/
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STATIC INLINE uint32_t StopWatch_Elapsed(uint32_t startTime)
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{
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return StopWatch_Start() - startTime;
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}
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/**
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* @brief Returns number of ticks per second of the stopwatch timer
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* @return Number of ticks per second of the stopwatch timer
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*/
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uint32_t StopWatch_TicksPerSecond(void);
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/**
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* @brief Converts from stopwatch ticks to mS.
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* @param ticks : Duration in ticks to convert to mS.
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* @return Number of mS in given number of ticks
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*/
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uint32_t StopWatch_TicksToMs(uint32_t ticks);
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/**
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* @brief Converts from stopwatch ticks to uS.
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* @param ticks : Duration in ticks to convert to uS.
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* @return Number of uS in given number of ticks
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*/
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uint32_t StopWatch_TicksToUs(uint32_t ticks);
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/**
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* @brief Converts from mS to stopwatch ticks.
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* @param mS : Duration in mS to convert to ticks.
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* @return Number of ticks in given number of mS
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*/
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uint32_t StopWatch_MsToTicks(uint32_t mS);
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/**
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* @brief Converts from uS to stopwatch ticks.
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* @param uS : Duration in uS to convert to ticks.
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* @return Number of ticks in given number of uS
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*/
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uint32_t StopWatch_UsToTicks(uint32_t uS);
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/**
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* @brief Delays the given number of ticks using stopwatch primitives
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* @param ticks : Number of ticks to delay
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* @return Nothing
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*/
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STATIC INLINE void StopWatch_DelayTicks(uint32_t ticks)
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{
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uint32_t startTime = StopWatch_Start();
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while (StopWatch_Elapsed(startTime) < ticks) {}
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}
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/**
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* @brief Delays the given number of mS using stopwatch primitives
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* @param mS : Number of mS to delay
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* @return Nothing
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*/
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STATIC INLINE void StopWatch_DelayMs(uint32_t mS)
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{
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uint32_t ticks = StopWatch_MsToTicks(mS);
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uint32_t startTime = StopWatch_Start();
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while (StopWatch_Elapsed(startTime) < ticks) {}
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}
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/**
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* @brief Delays the given number of uS using stopwatch primitives
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* @param uS : Number of uS to delay
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* @return Nothing
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*/
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STATIC INLINE void StopWatch_DelayUs(uint32_t uS)
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{
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uint32_t ticks = StopWatch_UsToTicks(uS);
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uint32_t startTime = StopWatch_Start();
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while (StopWatch_Elapsed(startTime) < ticks) {}
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}
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/**
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* @}
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*/
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#endif /* __STOPWATCH_H_ */
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