| /* |
| * Copyright (c) 2016, Freescale Semiconductor, Inc. |
| * Copyright 2016-2017 NXP |
| * All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include "fsl_mrt.h" |
| |
| /* Component ID definition, used by tools. */ |
| #ifndef FSL_COMPONENT_ID |
| #define FSL_COMPONENT_ID "platform.drivers.mrt" |
| #endif |
| |
| /******************************************************************************* |
| * 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 */ |
| |
| #if !(defined(FSL_SDK_DISABLE_DRIVER_RESET_CONTROL) && FSL_SDK_DISABLE_DRIVER_RESET_CONTROL) |
| #if defined(FSL_FEATURE_MRT_WRITE_ZERO_ASSERT_RESET) && FSL_FEATURE_MRT_WRITE_ZERO_ASSERT_RESET |
| /*! @brief Pointers to MRT resets for each instance, writing a zero asserts the reset */ |
| static const reset_ip_name_t s_mrtResets[] = MRT_RSTS_N; |
| #else |
| /*! @brief Pointers to MRT resets for each instance, writing a one asserts the reset */ |
| static const reset_ip_name_t s_mrtResets[] = MRT_RSTS; |
| #endif |
| #endif /* FSL_SDK_DISABLE_DRIVER_RESET_CONTROL */ |
| |
| /******************************************************************************* |
| * 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; |
| } |
| |
| /*! |
| * brief Ungates the MRT clock and configures the peripheral for basic operation. |
| * |
| * note This API should be called at the beginning of the application using the MRT driver. |
| * |
| * param base Multi-Rate timer peripheral base address |
| * param config Pointer to user's MRT config structure. If MRT has MULTITASK bit field in |
| * MODCFG reigster, param config is useless. |
| */ |
| 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 */ |
| |
| #if !(defined(FSL_SDK_DISABLE_DRIVER_RESET_CONTROL) && FSL_SDK_DISABLE_DRIVER_RESET_CONTROL) |
| /* Reset the module. */ |
| RESET_PeripheralReset(s_mrtResets[MRT_GetInstance(base)]); |
| #endif /* FSL_SDK_DISABLE_DRIVER_RESET_CONTROL */ |
| |
| #if !(defined(FSL_FEATURE_MRT_HAS_NO_MODCFG_MULTITASK) && FSL_FEATURE_MRT_HAS_NO_MODCFG_MULTITASK) |
| /* Set timer operating mode */ |
| base->MODCFG = MRT_MODCFG_MULTITASK(config->enableMultiTask); |
| #endif |
| } |
| |
| /*! |
| * brief Gate the MRT clock |
| * |
| * param base Multi-Rate timer peripheral base address |
| */ |
| void MRT_Deinit(MRT_Type *base) |
| { |
| /* Stop all the timers */ |
| MRT_StopTimer(base, kMRT_Channel_0); |
| MRT_StopTimer(base, kMRT_Channel_1); |
| #if (FSL_FEATURE_MRT_NUMBER_OF_CHANNELS > 2U) |
| MRT_StopTimer(base, kMRT_Channel_2); |
| #endif |
| #if (FSL_FEATURE_MRT_NUMBER_OF_CHANNELS > 3U) |
| MRT_StopTimer(base, kMRT_Channel_3); |
| #endif |
| |
| #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 */ |
| } |
| |
| /*! |
| * brief Used to update the timer period in units of count. |
| * |
| * The new value will be immediately loaded or will be loaded at the end of the current time |
| * interval. For one-shot interrupt mode the new value will be immediately loaded. |
| * |
| * note User can call the utility macros provided in fsl_common.h to convert to ticks |
| * |
| * param base Multi-Rate timer peripheral base address |
| * param channel Timer channel number |
| * param count Timer period in units of ticks |
| * param immediateLoad true: Load the new value immediately into the TIMER register; |
| * false: Load the new value at the end of current timer interval |
| */ |
| void MRT_UpdateTimerPeriod(MRT_Type *base, mrt_chnl_t channel, uint32_t count, bool immediateLoad) |
| { |
| assert(channel < FSL_FEATURE_MRT_NUMBER_OF_CHANNELS); |
| |
| 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; |
| } |