text: /*
   * Copyright (c) 2016, Freescale Semiconductor, Inc.
   * Copyright 2016-2017 NXP
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted 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.
   *
   * 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_ */
  