153 lines
5.3 KiB
C
153 lines
5.3 KiB
C
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/*
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* Copyright (c) 2016, Freescale Semiconductor, Inc.
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* Copyright 2016-2017, 2020 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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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_SDK_DISABLE_DRIVER_RESET_CONTROL) && FSL_SDK_DISABLE_DRIVER_RESET_CONTROL)
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#if defined(MRT_RSTS_N)
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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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#elif defined(MRT_RSTS)
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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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#endif /* FSL_SDK_DISABLE_DRIVER_RESET_CONTROL */
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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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/*!
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* brief Ungates the MRT clock and configures the peripheral for basic operation.
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*
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* note This API should be called at the beginning of the application using the MRT driver.
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*
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* param base Multi-Rate timer peripheral base address
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* param config Pointer to user's MRT config structure. If MRT has MULTITASK bit field in
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* MODCFG reigster, param config is useless.
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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 != NULL);
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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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#if !(defined(FSL_SDK_DISABLE_DRIVER_RESET_CONTROL) && FSL_SDK_DISABLE_DRIVER_RESET_CONTROL)
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#if defined(MRT_RSTS_N) || defined(MRT_RSTS)
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/* Reset the module. */
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RESET_PeripheralReset(s_mrtResets[MRT_GetInstance(base)]);
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#endif
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#endif /* FSL_SDK_DISABLE_DRIVER_RESET_CONTROL */
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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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/*!
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* brief Gate the MRT clock
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*
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* param base Multi-Rate timer peripheral base address
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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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/*!
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* brief Used to update the timer period in units of count.
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*
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* The new value will be immediately loaded or will be loaded at the end of the current time
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* interval. For one-shot interrupt mode the new value will be immediately loaded.
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*
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* note User can call the utility macros provided in fsl_common.h to convert to ticks
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*
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* param base Multi-Rate timer peripheral base address
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* param channel Timer channel number
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* param count Timer period in units of ticks
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* param immediateLoad true: Load the new value immediately into the TIMER register;
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* false: Load the new value at the end of current timer interval
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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((uint8_t)channel < (uint8_t)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) == (uint8_t)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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