115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/*
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* The Clear BSD License
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* Copyright (c) 2016, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted (subject to the limitations in the disclaimer below) provided
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* that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _FSL_FMEAS_H_
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#define _FSL_FMEAS_H_
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#include "fsl_common.h"
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/*!
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* @addtogroup fmeas
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* @{
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*/
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/*! @file */
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/*******************************************************************************
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* Definitions
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*******************************************************************************/
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/*! @name Driver version */
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/*@{*/
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/*! @brief Defines LPC Frequency Measure driver version 2.0.0.
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*
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* Change log:
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* - Version 2.0.0
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* - initial version
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*/
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#define FSL_FMEAS_DRIVER_VERSION (MAKE_VERSION(2, 0, 0))
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/*@}*/
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/*******************************************************************************
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* API
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*******************************************************************************/
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#if defined(__cplusplus)
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extern "C" {
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#endif /* __cplusplus */
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/*!
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* @name FMEAS Functional Operation
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* @{
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*/
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/*!
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* @brief Starts a frequency measurement cycle.
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*
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* @param base : SYSCON peripheral base address.
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*/
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static inline void FMEAS_StartMeasure(SYSCON_Type *base)
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{
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base->FREQMECTRL = 0;
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base->FREQMECTRL = (1UL << 31);
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}
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/*!
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* @brief Indicates when a frequency measurement cycle is complete.
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*
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* @param base : SYSCON peripheral base address.
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* @return true if a measurement cycle is active, otherwise false.
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*/
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static inline bool FMEAS_IsMeasureComplete(SYSCON_Type *base)
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{
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return (bool)((base->FREQMECTRL & (1UL << 31)) == 0);
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}
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/*!
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* @brief Returns the computed value for a frequency measurement cycle
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*
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* @param base : SYSCON peripheral base address.
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* @param refClockRate : Reference clock rate used during the frequency measurement cycle.
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*
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* @return Frequency in Hz.
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*/
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uint32_t FMEAS_GetFrequency(SYSCON_Type *base, uint32_t refClockRate);
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/*@}*/
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#if defined(__cplusplus)
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}
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#endif /* __cplusplus */
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/*! @}*/
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#endif /* _FSL_FMEAS_H_ */
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