146 lines
5.5 KiB
C
146 lines
5.5 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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#include "fsl_mrt.h"
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/* Component ID definition, used by tools. */
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#ifndef FSL_COMPONENT_ID
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#define FSL_COMPONENT_ID "platform.drivers.mrt"
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#endif
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*!
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* @brief Gets the instance from the base address
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*
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* @param base Multi-Rate timer peripheral base address
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*
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* @return The MRT instance
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*/
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static uint32_t MRT_GetInstance(MRT_Type *base);
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/*******************************************************************************
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* Variables
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******************************************************************************/
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/*! @brief Pointers to MRT bases for each instance. */
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static MRT_Type *const s_mrtBases[] = MRT_BASE_PTRS;
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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/*! @brief Pointers to MRT clocks for each instance. */
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static const clock_ip_name_t s_mrtClocks[] = MRT_CLOCKS;
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#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
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#if defined(FSL_FEATURE_MRT_WRITE_ZERO_ASSERT_RESET) && FSL_FEATURE_MRT_WRITE_ZERO_ASSERT_RESET
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/*! @brief Pointers to MRT resets for each instance, writing a zero asserts the reset */
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static const reset_ip_name_t s_mrtResets[] = MRT_RSTS_N;
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#else
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/*! @brief Pointers to MRT resets for each instance, writing a one asserts the reset */
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static const reset_ip_name_t s_mrtResets[] = MRT_RSTS;
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#endif
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/*******************************************************************************
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* Code
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******************************************************************************/
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static uint32_t MRT_GetInstance(MRT_Type *base)
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{
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uint32_t instance;
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uint32_t mrtArrayCount = (sizeof(s_mrtBases) / sizeof(s_mrtBases[0]));
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/* Find the instance index from base address mappings. */
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for (instance = 0; instance < mrtArrayCount; instance++)
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{
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if (s_mrtBases[instance] == base)
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{
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break;
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}
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}
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assert(instance < mrtArrayCount);
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return instance;
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}
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void MRT_Init(MRT_Type *base, const mrt_config_t *config)
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{
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assert(config);
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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/* Ungate the MRT clock */
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CLOCK_EnableClock(s_mrtClocks[MRT_GetInstance(base)]);
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#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
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/* Reset the module */
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RESET_PeripheralReset(s_mrtResets[MRT_GetInstance(base)]);
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#if !(defined(FSL_FEATURE_MRT_HAS_NO_MODCFG_MULTITASK) && FSL_FEATURE_MRT_HAS_NO_MODCFG_MULTITASK)
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/* Set timer operating mode */
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base->MODCFG = MRT_MODCFG_MULTITASK(config->enableMultiTask);
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#endif
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}
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void MRT_Deinit(MRT_Type *base)
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{
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/* Stop all the timers */
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MRT_StopTimer(base, kMRT_Channel_0);
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MRT_StopTimer(base, kMRT_Channel_1);
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#if (FSL_FEATURE_MRT_NUMBER_OF_CHANNELS > 2U)
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MRT_StopTimer(base, kMRT_Channel_2);
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#endif
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#if (FSL_FEATURE_MRT_NUMBER_OF_CHANNELS > 3U)
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MRT_StopTimer(base, kMRT_Channel_3);
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#endif
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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/* Gate the MRT clock*/
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CLOCK_DisableClock(s_mrtClocks[MRT_GetInstance(base)]);
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#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
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}
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void MRT_UpdateTimerPeriod(MRT_Type *base, mrt_chnl_t channel, uint32_t count, bool immediateLoad)
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{
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assert(channel < FSL_FEATURE_MRT_NUMBER_OF_CHANNELS);
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uint32_t newValue = count;
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if (((base->CHANNEL[channel].CTRL & MRT_CHANNEL_CTRL_MODE_MASK) == kMRT_OneShotMode) || (immediateLoad))
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{
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/* For one-shot interrupt mode, load the new value immediately even if user forgot to enable */
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newValue |= MRT_CHANNEL_INTVAL_LOAD_MASK;
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}
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/* Update the timer interval value */
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base->CHANNEL[channel].INTVAL = newValue;
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}
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