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.
   */
  
  #include "fsl_lpc_mrt.h"
  
  /*******************************************************************************
   * Prototypes
   ******************************************************************************/
  /*!
   * @brief Gets the instance from the base address
   *
   * @param base Multi-Rate timer peripheral base address
   *
   * @return The MRT instance
   */
  static uint32_t MRT_GetInstance(MRT_Type *base);
  
  /*******************************************************************************
   * Variables
   ******************************************************************************/
  /*! @brief Pointers to MRT bases for each instance. */
  static MRT_Type *const s_mrtBases[] = MRT_BASE_PTRS;
  
  #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
  /*! @brief Pointers to MRT clocks for each instance. */
  static const clock_ip_name_t s_mrtClocks[] = MRT_CLOCKS;
  #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
  
  /*! @brief Pointers to MRT resets for each instance. */
  static const reset_ip_name_t s_mrtResets[] = MRT_RSTS;
  
  /*******************************************************************************
   * Code
   ******************************************************************************/
  static uint32_t MRT_GetInstance(MRT_Type *base)
  {
      uint32_t instance;
      uint32_t mrtArrayCount = (sizeof(s_mrtBases) / sizeof(s_mrtBases[0]));
  
      /* Find the instance index from base address mappings. */
      for (instance = 0; instance < mrtArrayCount; instance++)
      {
          if (s_mrtBases[instance] == base)
          {
              break;
          }
      }
  
      assert(instance < mrtArrayCount);
  
      return instance;
  }
  
  void MRT_Init(MRT_Type *base, const mrt_config_t *config)
  {
      assert(config);
  
  #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
      /* Ungate the MRT clock */
      CLOCK_EnableClock(s_mrtClocks[MRT_GetInstance(base)]);
  #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
  
      /* Reset the module */
      RESET_PeripheralReset(s_mrtResets[MRT_GetInstance(base)]);
  
      /* Set timer operating mode */
      base->MODCFG = MRT_MODCFG_MULTITASK(config->enableMultiTask);
  }
  
  void MRT_Deinit(MRT_Type *base)
  {
      /* Stop all the timers */
      MRT_StopTimer(base, kMRT_Channel_0);
      MRT_StopTimer(base, kMRT_Channel_1);
      MRT_StopTimer(base, kMRT_Channel_2);
      MRT_StopTimer(base, kMRT_Channel_3);
  
  #if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
      /* Gate the MRT clock*/
      CLOCK_DisableClock(s_mrtClocks[MRT_GetInstance(base)]);
  #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
  }
  
  void MRT_UpdateTimerPeriod(MRT_Type *base, mrt_chnl_t channel, uint32_t count, bool immediateLoad)
  {
      uint32_t newValue = count;
      if (((base->CHANNEL[channel].CTRL & MRT_CHANNEL_CTRL_MODE_MASK) == kMRT_OneShotMode) || (immediateLoad))
      {
          /* For one-shot interrupt mode, load the new value immediately even if user forgot to enable */
          newValue |= MRT_CHANNEL_INTVAL_LOAD_MASK;
      }
  
      /* Update the timer interval value */
      base->CHANNEL[channel].INTVAL = newValue;
  }
  