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