Umar Naeem
mbed library sources. Supersedes mbed-src.
Fork of
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by 
Umar Naeem
Diff: targets/TARGET_Maxim/TARGET_MAX32630/mxc/rtc.h
- Revision:
- 157:ff67d9f36b67
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/TARGET_MAX32630/mxc/rtc.h Thu Feb 02 17:01:33 2017 +0000
@@ -0,0 +1,476 @@
+/**
+ * @file
+ * @brief Real-Time Clock data types, definitions and function prototypes.
+ */
+ /* ****************************************************************************
+ * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *
+ * $Date: 2016-10-10 19:28:26 -0500 (Mon, 10 Oct 2016) $
+ * $Revision: 24670 $
+ *
+ **************************************************************************** */
+
+/* Define to prevent redundant inclusion */
+#ifndef _RTC_H_
+#define _RTC_H_
+
+/* **** Includes **** */
+#include "mxc_config.h"
+#include "rtc_regs.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @ingroup periphlibs
+ * @defgroup rtc Real-Time Clock (RTC)
+ * @brief Functions, types, and registers for the Real-Time Clock Peripheral.
+ * @{
+ */
+
+/* **** Definitions **** */
+/**
+ * Enumeration type for scaling down the 4096Hz input clock to the RTC.
+ */
+typedef enum {
+ RTC_PRESCALE_DIV_2_0 = MXC_V_RTC_PRESCALE_DIV_2_0, /**< \f$ f_{RTC} = \frac {4096} {2^{0}} = 4096Hz \f$ */
+ RTC_PRESCALE_DIV_2_1 = MXC_V_RTC_PRESCALE_DIV_2_1, /**< \f$ f_{RTC} = \frac {4096} {2^{1}} = 2048Hz \f$ */
+ RTC_PRESCALE_DIV_2_2 = MXC_V_RTC_PRESCALE_DIV_2_2, /**< \f$ f_{RTC} = \frac {4096} {2^{2}} = 1024Hz \f$ */
+ RTC_PRESCALE_DIV_2_3 = MXC_V_RTC_PRESCALE_DIV_2_3, /**< \f$ f_{RTC} = \frac {4096} {2^{3}} = 512Hz \f$ */
+ RTC_PRESCALE_DIV_2_4 = MXC_V_RTC_PRESCALE_DIV_2_4, /**< \f$ f_{RTC} = \frac {4096} {2^{4}} = 256Hz \f$ */
+ RTC_PRESCALE_DIV_2_5 = MXC_V_RTC_PRESCALE_DIV_2_5, /**< \f$ f_{RTC} = \frac {4096} {2^{5}} = 128Hz \f$ */
+ RTC_PRESCALE_DIV_2_6 = MXC_V_RTC_PRESCALE_DIV_2_6, /**< \f$ f_{RTC} = \frac {4096} {2^{6}} = 64Hz \f$ */
+ RTC_PRESCALE_DIV_2_7 = MXC_V_RTC_PRESCALE_DIV_2_7, /**< \f$ f_{RTC} = \frac {4096} {2^{7}} = 32Hz \f$ */
+ RTC_PRESCALE_DIV_2_8 = MXC_V_RTC_PRESCALE_DIV_2_8, /**< \f$ f_{RTC} = \frac {4096} {2^{8}} = 16Hz \f$ */
+ RTC_PRESCALE_DIV_2_9 = MXC_V_RTC_PRESCALE_DIV_2_9, /**< \f$ f_{RTC} = \frac {4096} {2^{9}} = 8Hz \f$ */
+ RTC_PRESCALE_DIV_2_10 = MXC_V_RTC_PRESCALE_DIV_2_10, /**< \f$ f_{RTC} = \frac {4096} {2^{10}} = 4Hz \f$ */
+ RTC_PRESCALE_DIV_2_11 = MXC_V_RTC_PRESCALE_DIV_2_11, /**< \f$ f_{RTC} = \frac {4096} {2^{11}} = 2Hz \f$ */
+ RTC_PRESCALE_DIV_2_12 = MXC_V_RTC_PRESCALE_DIV_2_12, /**< \f$ f_{RTC} = \frac {4096} {2^{12}} = 1Hz \f$ */
+} rtc_prescale_t;
+
+/**
+ * Mask of the RTC Flags for the Active Transaction.
+ */
+#define RTC_CTRL_ACTIVE_TRANS (MXC_F_RTC_CTRL_RTC_ENABLE_ACTIVE | \
+ MXC_F_RTC_CTRL_OSC_GOTO_LOW_ACTIVE | \
+ MXC_F_RTC_CTRL_OSC_FRCE_SM_EN_ACTIVE | \
+ MXC_F_RTC_CTRL_OSC_FRCE_ST_ACTIVE | \
+ MXC_F_RTC_CTRL_RTC_SET_ACTIVE | \
+ MXC_F_RTC_CTRL_RTC_CLR_ACTIVE | \
+ MXC_F_RTC_CTRL_ROLLOVER_CLR_ACTIVE | \
+ MXC_F_RTC_CTRL_PRESCALE_CMPR0_ACTIVE | \
+ MXC_F_RTC_CTRL_PRESCALE_UPDATE_ACTIVE | \
+ MXC_F_RTC_CTRL_CMPR1_CLR_ACTIVE | \
+ MXC_F_RTC_CTRL_CMPR0_CLR_ACTIVE | \
+ MXC_F_RTC_CTRL_TRIM_ENABLE_ACTIVE | \
+ MXC_F_RTC_CTRL_TRIM_SLOWER_ACTIVE | \
+ MXC_F_RTC_CTRL_TRIM_CLR_ACTIVE | \
+ MXC_F_RTC_CTRL_ACTIVE_TRANS_0)
+
+/**
+ * Mask used to clear all RTC interrupt flags, see \ref RTC_FLAGS_Register Register.
+ */
+#define RTC_FLAGS_CLEAR_ALL (MXC_F_RTC_FLAGS_COMP0 | \
+ MXC_F_RTC_FLAGS_COMP1| \
+ MXC_F_RTC_FLAGS_PRESCALE_COMP | \
+ MXC_F_RTC_FLAGS_OVERFLOW | \
+ MXC_F_RTC_FLAGS_TRIM)
+/**
+ * Enumeration type to select the type of RTC Snooze Mode for an alarm condition.
+ */
+typedef enum {
+ RTC_SNOOZE_DISABLE = MXC_V_RTC_CTRL_SNOOZE_DISABLE, /**< Snooze Mode Disabled */
+ RTC_SNOOZE_MODE_A = MXC_V_RTC_CTRL_SNOOZE_MODE_A, /**< \f$ COMP1 = COMP1 + RTC\_SNZ\_VALUE \f$ when snooze flag is set */
+ RTC_SNOOZE_MODE_B = MXC_V_RTC_CTRL_SNOOZE_MODE_B, /**< \f$ COMP1 = RTC\_TIMER + RTC\_SNZ\_VALUE \f$ when snooze flag is set */
+} rtc_snooze_t;
+
+/**
+ * Number of RTC Compare registers for this peripheral instance.
+ */
+#define RTC_NUM_COMPARE 2
+
+/**
+ * Structure type that represents the current configuration of the RTC.
+ */
+
+typedef struct {
+ rtc_prescale_t prescaler; /**< prescale value for the input 4096Hz clock. */
+ rtc_prescale_t prescalerMask; /**< Mask value used to compare to the rtc prescale value, when the \f$ (Count_{prescaler}\,\&\,Prescale\,Mask) == 0 \f$, the prescale compare flag will be set. */
+ uint32_t compareCount[RTC_NUM_COMPARE]; /**< Values used for setting the RTC alarms. See RTC_SetCompare() and RTC_GetCompare(). */
+ uint32_t snoozeCount; /**< The number of RTC ticks to snooze if enabled. */
+ rtc_snooze_t snoozeMode; /**< The desired snooze mode, see #rtc_snooze_t. */
+} rtc_cfg_t;
+
+/**
+ * @brief Initializes the RTC
+ * @note Must setup clocking and power prior to this function.
+ *
+ * @param cfg RTC configuration object.
+ *
+ * @retval #E_NO_ERROR RTC initialized successfully.
+ * @retval #E_NULL_PTR \p cfg pointer is NULL.
+ * @retval #E_INVALID if comparison index, prescaler mask or snooze mask
+ * are out of bounds, see #rtc_cfg_t.
+ */
+int RTC_Init(const rtc_cfg_t *cfg);
+
+/**
+ * @brief Enable and start the real-time clock continuing from its current value.
+ */
+__STATIC_INLINE void RTC_Start(void)
+{
+ MXC_RTCTMR->ctrl |= MXC_F_RTC_CTRL_ENABLE;
+
+ //wait for pending actions to complete
+ while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
+}
+
+/**
+ * @brief Disable and stop the real-time clock counting.
+ */
+__STATIC_INLINE void RTC_Stop(void)
+{
+ MXC_RTCTMR->ctrl &= ~(MXC_F_RTC_CTRL_ENABLE);
+
+ //wait for pending actions to complete
+ while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
+}
+
+/**
+ * @brief Returns the state (running or disabled) for the RTC.
+ *
+ * @retval 0 Disabled.
+ * @retval Non-zero Active.
+ */
+__STATIC_INLINE uint32_t RTC_IsActive(void)
+{
+ return (MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_ENABLE);
+}
+
+/**
+ * @brief Set the current count of the RTC
+ *
+ * @param count The desired count value to set for the RTC count.
+ */
+__STATIC_INLINE void RTC_SetCount(uint32_t count)
+{
+ MXC_RTCTMR->timer = count;
+
+ //wait for pending actions to complete
+ while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
+}
+
+/**
+ * @brief Get the current count value of the RTC.
+ *
+ * @retval The value of the RTC counter.
+ */
+__STATIC_INLINE uint32_t RTC_GetCount(void)
+{
+ return (MXC_RTCTMR->timer);
+}
+
+/**
+ * @brief Sets the compare value for the RTC.
+ *
+ * @param compareIndex Index of comparator to set, see #RTC_NUM_COMPARE
+ * for the total number of compare registers
+ * available.
+ * @param counts The value to set for the compare.
+ * @retval #E_NO_ERROR Compare count register set successfully for
+ * requested comparator.
+ * @retval #E_INVALID compareIndex is @>= RTC_NUM_COMPARE.
+ */
+int RTC_SetCompare(uint8_t compareIndex, uint32_t counts);
+
+/**
+ * @brief Gets the compare value for the RTC.
+ *
+ * @param compareIndex Index of the compare value to return. See #RTC_NUM_COMPARE
+ * for the total number of compare registers available.
+ *
+ * @returns The current value of the specified compare register for the RTC.
+ */
+uint32_t RTC_GetCompare(uint8_t compareIndex);
+
+/**
+ * @brief Set the prescale reload value for the real-time clock.
+ * @details The prescale reload value determines the number of 4kHz ticks
+ * that will occur before the timer is incremented.
+ * <table>
+ * <caption id="prescaler_val">Prescaler Settings and Corresponding RTC Resolutions</caption>
+ * <tr><th>PRESCALE <th>Prescale Reload <th>4kHz ticks in LSB <th>Min Timer Value (sec) <th> Max Timer Value (sec) <th>Max Timer Value (Days) <th> Max Timer Value (Years)
+ * <tr><td align="right">0h<td align="center">RTC_PRESCALE_DIV_2_0<td align="right">1<td align="right">0.00024<td align="right">1048576<td align="right">12<td align="right">0.0
+ * <tr><td align="right">1h<td align="center">RTC_PRESCALE_DIV_2_1<td align="right">2<td align="right">0.00049<td align="right">2097152<td align="right">24<td align="right">0.1
+ * <tr><td align="right">2h<td align="center">RTC_PRESCALE_DIV_2_2<td align="right">4<td align="right">0.00098<td align="right">4194304<td align="right">49<td align="right">0.1
+ * <tr><td align="right">3h<td align="center">RTC_PRESCALE_DIV_2_3<td align="right">8<td align="right">0.00195<td align="right">8388608<td align="right">97<td align="right">0.3
+ * <tr><td align="right">4h<td align="center">RTC_PRESCALE_DIV_2_4<td align="right">16<td align="right">0.00391<td align="right">16777216<td align="right">194 <td align="right">0.5
+ * <tr><td align="right">5h<td align="center">RTC_PRESCALE_DIV_2_5<td align="right">32<td align="right">0.00781<td align="right">33554432<td align="right">388 <td align="right">1.1
+ * <tr><td align="right">6h<td align="center">RTC_PRESCALE_DIV_2_6<td align="right">64<td align="right">0.01563<td align="right">67108864<td align="right">777 <td align="right">2.2
+ * <tr><td align="right">7h<td align="center">RTC_PRESCALE_DIV_2_7<td align="right">128<td align="right">0.03125<td align="right">134217728<td align="right">1553 <td align="right">4.4
+ * <tr><td align="right">8h<td align="center">RTC_PRESCALE_DIV_2_8<td align="right">256<td align="right">0.06250<td align="right">268435456<td align="right">3107 <td align="right">8.7
+ * <tr><td align="right">9h<td align="center">RTC_PRESCALE_DIV_2_9<td align="right">512<td align="right">0.12500<td align="right">536870912<td align="right">6214 <td align="right">17.5
+ * <tr><td align="right">Ah<td align="center">RTC_PRESCALE_DIV_2_10<td align="right">1024 <td align="right">0.25000<td align="right">1073741824<td align="right">12428<td align="right">34.9
+ * <tr><td align="right">Bh<td align="center">RTC_PRESCALE_DIV_2_11<td align="right">2048 <td align="right">0.50000<td align="right">2147483648<td align="right">24855<td align="right">69.8
+ * <tr><td align="right">Ch<td align="center">RTC_PRESCALE_DIV_2_12<td align="right">4096 <td align="right">1.00000<td align="right">4294967296<td align="right">49710<td align="right">139.6
+ * </table>
+ *
+ * @param prescaler Prescale value to set, see #rtc_prescale_t.
+ */
+__STATIC_INLINE void RTC_SetPrescaler(rtc_prescale_t prescaler)
+{
+ MXC_RTCTMR->prescale = prescaler;
+
+ //wait for pending actions to complete
+ while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
+}
+
+/**
+ * @brief Get the current value of the real-time clock prescaler.
+ *
+ * @retval rtc_prescale_t Returns the current RTC prescaler setting,
+ * See #rtc_prescale_t for values of the prescaler.
+ */
+__STATIC_INLINE rtc_prescale_t RTC_GetPrescaler(void)
+{
+ return (rtc_prescale_t)(MXC_RTCTMR->prescale);
+}
+
+/**
+ * @brief Set the prescaler mask, which is used to set the RTC prescale counter
+ * compare flag when the prescaler timer matches the bits indicated
+ * by the mask.
+ * @param mask A bit mask that is used to set the prescale compare flag if the
+ * prescale timer has the corresponding bits set. @note This mask must
+ * be less than or equal to the prescaler reload value.
+ * See RTC_SetPrescaler()
+ * @details When \f$ Count_{prescaler}\,\&\,Prescale\,Mask = 0 \f$, the prescale compare flag is set
+ * @retval int Returns #E_NO_ERROR if prescale value is valid and is set.
+ * @retval int Returns #E_INVALID if mask is \> than prescaler value
+ */
+__STATIC_INLINE int RTC_SetPrescalerMask(rtc_prescale_t mask)
+{
+ if (mask > ((rtc_prescale_t)(MXC_RTCTMR->prescale)))
+ {
+ return E_INVALID;
+ }
+ MXC_RTCTMR->prescale_mask = mask;
+
+ //wait for pending actions to complete
+ while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
+ return E_NO_ERROR;
+}
+
+/**
+ * @brief Set the count for snooze mode. See RTC_Snooze().
+ * @details This value is used to set the snooze count. The meaning of this value is dependant on the snooze mode. p
+ * See RTC_SetSnoozeMode() for details of calculating the snooze time period based on the mode and snooze count.
+ * @param count Sets the count used for snooze when snooze mode is
+ * enabled and the snooze flag is set.
+ * @retval #E_NO_ERROR Snooze value is set correctly and value is valid.
+ * @retval #E_INVALID SnoozeCount exceeds maximum supported, see
+ * MXC_F_RTC_SNZ_VAL_VALUE
+ */
+__STATIC_INLINE int RTC_SetSnoozeCount(uint32_t count)
+{
+ // Check to make sure max value is not being exceeded
+ if (count > MXC_F_RTC_SNZ_VAL_VALUE)
+ return E_INVALID;
+
+ MXC_RTCTMR->snz_val = count;
+
+ //wait for pending actions to complete
+ while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
+ return E_NO_ERROR;
+}
+
+/**
+ * @brief Gets the current Snooze Count value.
+ * @details Returns the current value for the Snooze Count. This value is
+ * used as part of the snooze calculation depending on the snooze
+ * mode. See RTC_SetSnoozeMode() for details of calculating the
+ * snooze time period based on the mode and count.
+ * @return Value of the snooze register.
+ */
+__STATIC_INLINE uint32_t RTC_GetSnoozeCount(void)
+{
+ return MXC_RTCTMR->snz_val;
+}
+
+/**
+ * @brief Activates snooze mode.
+ * @details Begins a snooze of the RTC. When this function is called
+ * the snooze time period is determined based on the snooze mode and the count.
+ * See RTC_GetCount() and RTC_SetSnoozeMode()
+ */
+__STATIC_INLINE void RTC_Snooze(void)
+{
+ MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_SNOOZE_A | MXC_F_RTC_FLAGS_SNOOZE_B;
+
+ //wait for pending actions to complete
+ while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
+}
+
+/**
+ * @brief Sets the Snooze Mode.
+ * @details <table> <caption id="snoozeModesTable">Snooze Modes</caption>
+ * <tr><th>Mode<th>Snooze Time Calculation
+ * <tr><td>RTC_SNOOZE_DISABLE<td>Snooze Disabled
+ * <tr><td>RTC_SNOOZE_MODE_A<td>\f$ compare1 = compare1 + snoozeCount \f$
+ * <tr><td>RTC_SNOOZE_MODE_B<td>\f$ compare1 = count + snoozeCount \f$
+ * </table>
+ * @note @a count is the value of the RTC counter when RTC_Snooze()
+ * is called to start a snooze cycle and @a snoozeCount is the value set by the RTC_SetSnoozeCount(uint32_t count) function.
+ *
+ * @param mode Specifies the desired snooze mode, see #rtc_snooze_t.
+ *
+ */
+__STATIC_INLINE void RTC_SetSnoozeMode(rtc_snooze_t mode)
+{
+ uint32_t ctrl;
+ // Get the control register and mask off the non-snooze bits
+ ctrl = (MXC_RTCTMR->ctrl & ~(MXC_F_RTC_CTRL_SNOOZE_ENABLE));
+ // set the requested snooze mode bits and save the settings
+ MXC_RTCTMR->ctrl = (ctrl | (mode << MXC_F_RTC_CTRL_SNOOZE_ENABLE_POS));
+
+ //wait for pending actions to complete
+ while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
+}
+
+/**
+ * @brief Enables the interrupts specified for the RTC.
+ * @details <table>
+ * <caption id="RTC_interrupts">RTC Interrupts</caption>
+ * <tr><th>Interrupt<th>Mask
+ * <tr><td>Compare 0<td>#MXC_F_RTC_INTEN_COMP0
+ * <tr><td>Compare 1 and Snooze<td>#MXC_F_RTC_INTEN_COMP1
+ * <tr><td>Prescale Comp<td>#MXC_F_RTC_INTEN_PRESCALE_COMP
+ * <tr><td>RTC Count Overflow<td>#MXC_F_RTC_INTEN_OVERFLOW
+ * <tr><td>Trim<td>#MXC_F_RTC_INTEN_TRIM
+ * </table>
+ * @param mask A mask of the RTC interrupts to enable, 1 = Enable. See
+ * @ref RTC_FLAGS_Register Register for the RTC interrupt enable bit masks and positions.
+ */
+__STATIC_INLINE void RTC_EnableINT(uint32_t mask)
+{
+ MXC_RTCTMR->inten |= mask;
+}
+
+/**
+ * @brief Disable the interrupts specified for the RTC. See the
+ * @ref RTC_INTEN_Register Register for the RTC interrupt enable bit masks and positions.
+ *
+ * @param mask A mask of the RTC interrupts to disable, 1 = Disable.
+ */
+__STATIC_INLINE void RTC_DisableINT(uint32_t mask)
+{
+ MXC_RTCTMR->inten &= ~mask;
+}
+
+/**
+ * @brief Returns the current interrupt flags that are set.
+ *
+ * @return A mask of the current interrupt flags, see the
+ * @ref RTC_FLAGS_Register Register for the details of the RTC interrupt
+ * flags.
+ */
+__STATIC_INLINE uint32_t RTC_GetFlags(void)
+{
+ return (MXC_RTCTMR->flags);
+}
+
+/**
+ * @brief Clears the interrupt flags specified.
+ *
+ * @param mask A mask of interrupts to clear, see the @ref RTC_FLAGS_Register
+ * Register for the interrupt flag bit masks and positions.
+ */
+__STATIC_INLINE void RTC_ClearFlags(uint32_t mask)
+{
+ MXC_RTCTMR->flags = mask;
+
+ //wait for pending actions to complete
+ while(MXC_RTCTMR->ctrl & MXC_F_RTC_CTRL_PENDING);
+}
+
+/**
+ * @brief Gets the active transaction flags, see @ref RTC_CTRL_Register Register for the list of ACTIVE flags.
+ *
+ * @retval 0 No active transactions.
+ * @retval nonzero A mask of active transaction bits.
+ */
+__STATIC_INLINE uint32_t RTC_GetActiveTrans(void)
+{
+ return (MXC_RTCTMR->ctrl & RTC_CTRL_ACTIVE_TRANS);
+}
+
+/**
+ * @brief Sets the trim value and trim slow/fast option.
+ * @warning The RTC must be disabled prior to calling this function, see RTC_Stop(void) to disable the RTC.
+ *
+ * @param trim The desired trim value. @note The maximum trim value setting is 0x03FFFF.
+ * @param trimSlow 1 = trim slow, 0 = trim fast
+ *
+ * @return #E_NO_ERROR Trim value is valid and set.
+ * @return #E_INVALID Trim value exceeds max trim.
+ * @return #E_BAD_STATE RTC is active.
+ */
+int RTC_SetTrim(uint32_t trim, uint8_t trimSlow);
+
+/**
+ * @brief Gets the current trim value.
+ * @note Ensure RTC is disabled prior to calling this function, see RTC_Stop(void).
+ *
+ * @retval uint32_t Current trim value of RTC.
+ */
+uint32_t RTC_GetTrim(void);
+
+/**
+ * @brief Enable the trim.
+ * @warning The RTC must be disabled prior to calling this function, see RTC_Stop(void) to disable the RTC.
+ * @retval #E_NO_ERROR Trim is enabled.
+ * @retval #E_INVALID RTC is active, see RTC_Stop(void).
+ */
+int RTC_TrimEnable(void);
+
+/**
+ * @brief Disable the trim.
+ */
+void RTC_TrimDisable(void);
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTC_H */