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+/*
+ * The Clear BSD License
+ * Copyright (c) 2015, Freescale Semiconductor, Inc.
+ * Copyright 2016-2017 NXP
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted (subject to the limitations in the disclaimer below) 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.
+ *
+ * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
+ * 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_PIT_H_
+#define _FSL_PIT_H_
+
+#include "fsl_common.h"
+
+/*!
+ * @addtogroup pit
+ * @{
+ */
+
+
+/*******************************************************************************
+ * Definitions
+ ******************************************************************************/
+
+/*! @name Driver version */
+/*@{*/
+#define FSL_PIT_DRIVER_VERSION (MAKE_VERSION(2, 0, 0)) /*!< Version 2.0.0 */
+/*@}*/
+
+/*!
+ * @brief List of PIT channels
+ * @note Actual number of available channels is SoC dependent
+ */
+typedef enum _pit_chnl
+{
+ kPIT_Chnl_0 = 0U, /*!< PIT channel number 0*/
+ kPIT_Chnl_1, /*!< PIT channel number 1 */
+ kPIT_Chnl_2, /*!< PIT channel number 2 */
+ kPIT_Chnl_3, /*!< PIT channel number 3 */
+} pit_chnl_t;
+
+/*! @brief List of PIT interrupts */
+typedef enum _pit_interrupt_enable
+{
+ kPIT_TimerInterruptEnable = PIT_TCTRL_TIE_MASK, /*!< Timer interrupt enable*/
+} pit_interrupt_enable_t;
+
+/*! @brief List of PIT status flags */
+typedef enum _pit_status_flags
+{
+ kPIT_TimerFlag = PIT_TFLG_TIF_MASK, /*!< Timer flag */
+} pit_status_flags_t;
+
+/*!
+ * @brief PIT configuration structure
+ *
+ * This structure holds the configuration settings for the PIT peripheral. To initialize this
+ * structure to reasonable defaults, call the PIT_GetDefaultConfig() function and pass a
+ * pointer to your config structure instance.
+ *
+ * The configuration structure can be made constant so it resides in flash.
+ */
+typedef struct _pit_config
+{
+ bool enableRunInDebug; /*!< true: Timers run in debug mode; false: Timers stop in debug mode */
+} pit_config_t;
+
+/*******************************************************************************
+ * API
+ ******************************************************************************/
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/*!
+ * @name Initialization and deinitialization
+ * @{
+ */
+
+/*!
+ * @brief Ungates the PIT clock, enables the PIT module, and configures the peripheral for basic operations.
+ *
+ * @note This API should be called at the beginning of the application using the PIT driver.
+ *
+ * @param base PIT peripheral base address
+ * @param config Pointer to the user's PIT config structure
+ */
+void PIT_Init(PIT_Type *base, const pit_config_t *config);
+
+/*!
+ * @brief Gates the PIT clock and disables the PIT module.
+ *
+ * @param base PIT peripheral base address
+ */
+void PIT_Deinit(PIT_Type *base);
+
+/*!
+ * @brief Fills in the PIT configuration structure with the default settings.
+ *
+ * The default values are as follows.
+ * @code
+ * config->enableRunInDebug = false;
+ * @endcode
+ * @param config Pointer to the onfiguration structure.
+ */
+static inline void PIT_GetDefaultConfig(pit_config_t *config)
+{
+ assert(config);
+
+ /* Timers are stopped in Debug mode */
+ config->enableRunInDebug = false;
+}
+
+#if defined(FSL_FEATURE_PIT_HAS_CHAIN_MODE) && FSL_FEATURE_PIT_HAS_CHAIN_MODE
+
+/*!
+ * @brief Enables or disables chaining a timer with the previous timer.
+ *
+ * When a timer has a chain mode enabled, it only counts after the previous
+ * timer has expired. If the timer n-1 has counted down to 0, counter n
+ * decrements the value by one. Each timer is 32-bits, which allows the developers
+ * to chain timers together and form a longer timer (64-bits and larger). The first timer
+ * (timer 0) can't be chained to any other timer.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number which is chained with the previous timer
+ * @param enable Enable or disable chain.
+ * true: Current timer is chained with the previous timer.
+ * false: Timer doesn't chain with other timers.
+ */
+static inline void PIT_SetTimerChainMode(PIT_Type *base, pit_chnl_t channel, bool enable)
+{
+ if (enable)
+ {
+ base->CHANNEL[channel].TCTRL |= PIT_TCTRL_CHN_MASK;
+ }
+ else
+ {
+ base->CHANNEL[channel].TCTRL &= ~PIT_TCTRL_CHN_MASK;
+ }
+}
+
+#endif /* FSL_FEATURE_PIT_HAS_CHAIN_MODE */
+
+/*! @}*/
+
+/*!
+ * @name Interrupt Interface
+ * @{
+ */
+
+/*!
+ * @brief Enables the selected PIT interrupts.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number
+ * @param mask The interrupts to enable. This is a logical OR of members of the
+ * enumeration ::pit_interrupt_enable_t
+ */
+static inline void PIT_EnableInterrupts(PIT_Type *base, pit_chnl_t channel, uint32_t mask)
+{
+ base->CHANNEL[channel].TCTRL |= mask;
+}
+
+/*!
+ * @brief Disables the selected PIT interrupts.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number
+ * @param mask The interrupts to disable. This is a logical OR of members of the
+ * enumeration ::pit_interrupt_enable_t
+ */
+static inline void PIT_DisableInterrupts(PIT_Type *base, pit_chnl_t channel, uint32_t mask)
+{
+ base->CHANNEL[channel].TCTRL &= ~mask;
+}
+
+/*!
+ * @brief Gets the enabled PIT interrupts.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number
+ *
+ * @return The enabled interrupts. This is the logical OR of members of the
+ * enumeration ::pit_interrupt_enable_t
+ */
+static inline uint32_t PIT_GetEnabledInterrupts(PIT_Type *base, pit_chnl_t channel)
+{
+ return (base->CHANNEL[channel].TCTRL & PIT_TCTRL_TIE_MASK);
+}
+
+/*! @}*/
+
+/*!
+ * @name Status Interface
+ * @{
+ */
+
+/*!
+ * @brief Gets the PIT status flags.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number
+ *
+ * @return The status flags. This is the logical OR of members of the
+ * enumeration ::pit_status_flags_t
+ */
+static inline uint32_t PIT_GetStatusFlags(PIT_Type *base, pit_chnl_t channel)
+{
+ return (base->CHANNEL[channel].TFLG & PIT_TFLG_TIF_MASK);
+}
+
+/*!
+ * @brief Clears the PIT status flags.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number
+ * @param mask The status flags to clear. This is a logical OR of members of the
+ * enumeration ::pit_status_flags_t
+ */
+static inline void PIT_ClearStatusFlags(PIT_Type *base, pit_chnl_t channel, uint32_t mask)
+{
+ base->CHANNEL[channel].TFLG = mask;
+}
+
+/*! @}*/
+
+/*!
+ * @name Read and Write the timer period
+ * @{
+ */
+
+/*!
+ * @brief Sets the timer period in units of count.
+ *
+ * Timers begin counting from the value set by this function until it reaches 0,
+ * then it generates an interrupt and load this register value again.
+ * Writing a new value to this register does not restart the timer. Instead, the value
+ * is loaded after the timer expires.
+ *
+ * @note Users can call the utility macros provided in fsl_common.h to convert to ticks.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number
+ * @param count Timer period in units of ticks
+ */
+static inline void PIT_SetTimerPeriod(PIT_Type *base, pit_chnl_t channel, uint32_t count)
+{
+ base->CHANNEL[channel].LDVAL = count;
+}
+
+/*!
+ * @brief Reads the current timer counting value.
+ *
+ * This function returns the real-time timer counting value, in a range from 0 to a
+ * timer period.
+ *
+ * @note Users can call the utility macros provided in fsl_common.h to convert ticks to usec or msec.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number
+ *
+ * @return Current timer counting value in ticks
+ */
+static inline uint32_t PIT_GetCurrentTimerCount(PIT_Type *base, pit_chnl_t channel)
+{
+ return base->CHANNEL[channel].CVAL;
+}
+
+/*! @}*/
+
+/*!
+ * @name Timer Start and Stop
+ * @{
+ */
+
+/*!
+ * @brief Starts the timer counting.
+ *
+ * After calling this function, timers load period value, count down to 0 and
+ * then load the respective start value again. Each time a timer reaches 0,
+ * it generates a trigger pulse and sets the timeout interrupt flag.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number.
+ */
+static inline void PIT_StartTimer(PIT_Type *base, pit_chnl_t channel)
+{
+ base->CHANNEL[channel].TCTRL |= PIT_TCTRL_TEN_MASK;
+}
+
+/*!
+ * @brief Stops the timer counting.
+ *
+ * This function stops every timer counting. Timers reload their periods
+ * respectively after the next time they call the PIT_DRV_StartTimer.
+ *
+ * @param base PIT peripheral base address
+ * @param channel Timer channel number.
+ */
+static inline void PIT_StopTimer(PIT_Type *base, pit_chnl_t channel)
+{
+ base->CHANNEL[channel].TCTRL &= ~PIT_TCTRL_TEN_MASK;
+}
+
+/*! @}*/
+
+#if defined(FSL_FEATURE_PIT_HAS_LIFETIME_TIMER) && FSL_FEATURE_PIT_HAS_LIFETIME_TIMER
+
+/*!
+ * @brief Reads the current lifetime counter value.
+ *
+ * The lifetime timer is a 64-bit timer which chains timer 0 and timer 1 together.
+ * Timer 0 and 1 are chained by calling the PIT_SetTimerChainMode before using this timer.
+ * The period of lifetime timer is equal to the "period of timer 0 * period of timer 1".
+ * For the 64-bit value, the higher 32-bit has the value of timer 1, and the lower 32-bit
+ * has the value of timer 0.
+ *
+ * @param base PIT peripheral base address
+ *
+ * @return Current lifetime timer value
+ */
+uint64_t PIT_GetLifetimeTimerCount(PIT_Type *base);
+
+#endif /* FSL_FEATURE_PIT_HAS_LIFETIME_TIMER */
+
+#if defined(__cplusplus)
+}
+#endif
+
+/*! @}*/
+
+#endif /* _FSL_PIT_H_ */



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