Umar Naeem
mbed library sources. Supersedes mbed-src.
Fork of
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by 
Umar Naeem
Diff: targets/TARGET_Maxim/TARGET_MAX32625/mxc/rtc.h
- Revision:
- 150:02e0a0aed4ec
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/TARGET_MAX32625/mxc/rtc.h Tue Nov 08 17:45:16 2016 +0000
@@ -0,0 +1,446 @@
+/*******************************************************************************
+ * 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: 2016-03-21 10:05:23 -0500 (Mon, 21 Mar 2016) $
+ * $Revision: 22008 $
+ *
+ ******************************************************************************/
+
+/**
+ * @file rtc.h
+ * @addtogroup rtc Real-time Clock
+ * @{
+ * @brief This is the high level API for the real-time clock module
+ */
+
+#ifndef _RTC_H
+#define _RTC_H
+
+#include "mxc_config.h"
+#include "rtc_regs.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/// @enum rtc_prescale_t Defines clock divider for 4096Hz input clock.
+typedef enum {
+ RTC_PRESCALE_DIV_2_0 = MXC_V_RTC_PRESCALE_DIV_2_0, ///< (4.096kHz) divide input clock by \f$ 2^{0} = 1 \f$ (0x001)
+ RTC_PRESCALE_DIV_2_1 = MXC_V_RTC_PRESCALE_DIV_2_1, ///< (2.048kHz) divide input clock by \f$ 2^{1} = 2 \f$ (0x002)
+ RTC_PRESCALE_DIV_2_2 = MXC_V_RTC_PRESCALE_DIV_2_2, ///< (1.024kHz) divide input clock by \f$ 2^{2} = 4 \f$
+ RTC_PRESCALE_DIV_2_3 = MXC_V_RTC_PRESCALE_DIV_2_3, ///< (512Hz) divide input clock by \f$ 2^{3} = 8 \f$
+ RTC_PRESCALE_DIV_2_4 = MXC_V_RTC_PRESCALE_DIV_2_4, ///< (256Hz) divide input clock by \f$ 2^{4} = 16 \f$
+ RTC_PRESCALE_DIV_2_5 = MXC_V_RTC_PRESCALE_DIV_2_5, ///< (128Hz) divide input clock by \f$ 2^{5} = 32 \f$
+ RTC_PRESCALE_DIV_2_6 = MXC_V_RTC_PRESCALE_DIV_2_6, ///< (64Hz) divide input clock by \f$ 2^{6} = 64 \f$
+ RTC_PRESCALE_DIV_2_7 = MXC_V_RTC_PRESCALE_DIV_2_7, ///< (32Hz) divide input clock by \f$ 2^{7} = 128 \f$
+ RTC_PRESCALE_DIV_2_8 = MXC_V_RTC_PRESCALE_DIV_2_8, ///< (16Hz) divide input clock by \f$ 2^{8} = 256 \f$
+ RTC_PRESCALE_DIV_2_9 = MXC_V_RTC_PRESCALE_DIV_2_9, ///< (8Hz) divide input clock by \f$ 2^{9} = 512 \f$
+ RTC_PRESCALE_DIV_2_10 = MXC_V_RTC_PRESCALE_DIV_2_10, ///< (4Hz) divide input clock by \f$ 2^{10} = 1024 \f$
+ RTC_PRESCALE_DIV_2_11 = MXC_V_RTC_PRESCALE_DIV_2_11, ///< (2Hz) divide input clock by \f$ 2^{11} = 2048 \f$ (0x07FF)
+ RTC_PRESCALE_DIV_2_12 = MXC_V_RTC_PRESCALE_DIV_2_12, ///< (1Hz) divide input clock by \f$ 2^{12} = 4096 \f$ (0x0FFF)
+} rtc_prescale_t;
+
+/// @def RTC_CTRL_ACTIVE_TRANS Active Transaction Flags for the RTC
+#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)
+
+/// @def RTC_FLAGS_CLEAR_ALL Number of RTC compare registers
+#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)
+/// @enum rtc_snooze_t Defines the snooze modes
+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, ///< COMP1 = COMP1 + RTC_SNZ_VALUE when snooze flag is set
+ RTC_SNOOZE_MODE_B = MXC_V_RTC_CTRL_SNOOZE_MODE_B, ///< COMP1 = RTC_TIMER + RTC_SNZ_VALUE when snooze flag is set
+} rtc_snooze_t; /// Defines the snooze modes
+
+/// @def RTC_NUM_COMPARE Number of RTC compare registers
+#define RTC_NUM_COMPARE 2
+
+/// @brief A structure that represents the configuration of the RTC peripheral
+typedef struct {
+ rtc_prescale_t prescaler; /// prescale value rtc_prescale_t
+ rtc_prescale_t prescalerMask; /// Mask value used to compare to the rtc prescale value, when the \f$ \big((Count_{prescaler}\,\&\,Prescale\,Mask) == 0\big) \f$, the prescale compare flag will be set.
+ uint32_t compareCount[RTC_NUM_COMPARE]; /// Values used for 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
+} rtc_cfg_t;
+
+/**
+ * @brief Initializes the RTC
+ * @note Must setup clocking and power prior to this function.
+ *
+ * @param cfg configuration
+ *
+ * @retval E_NO_ERROR if everything is successful
+ * @retval E_NULL_PTR if cfg pointer is NULL
+ * @retval E_INVALID if comparison index, prescaler mask or snooze mask are
+ * out of bounds
+ */
+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
+ */
+__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 Determines if the RTC is running or not.
+ *
+ * @retval 0 if Disabled, Non-zero if 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 count value to set current real-time 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 timer value of the RTC.
+ *
+ * @retval The value of the RTC counter.
+ */
+__STATIC_INLINE uint32_t RTC_GetCount(void)
+{
+ return (MXC_RTCTMR->timer);
+}
+
+/**
+ * @brief Set the comparator value
+ *
+ * @param compareIndex Index of comparator to set, see RTC_NUM_COMPARE
+ * for the total number of compare registers available.
+ * @param counts Unsigned 32-bit compare value to set.
+ * @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 Get the comparator value
+ *
+ * @param compareIndex Index of the comparator to get. See RTC_NUM_COMPARE
+ * for the total number of compare registers available.
+ *
+ * @retval uint32_t 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
+ * occur before the timer is incremented. See @ref prescaler_val "Table"
+ * for accepted values and corresponding timer resolution.
+ *
+ * <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>0h <td> RTC_PRESCALE_DIV_2_0 <td> 1 <td> 0.00024 <td> 1048576 <td> 12 <td> 0.0
+ * <tr><td>1h <td> RTC_PRESCALE_DIV_2_1 <td> 2 <td> 0.00049 <td> 2097152 <td> 24 <td> 0.1
+ * <tr><td>2h <td> RTC_PRESCALE_DIV_2_2 <td> 4 <td> 0.00098 <td> 4194304 <td> 49 <td> 0.1
+ * <tr><td>3h <td> RTC_PRESCALE_DIV_2_3 <td> 8 <td> 0.00195 <td> 8388608 <td> 97 <td> 0.3
+ * <tr><td>4h <td> RTC_PRESCALE_DIV_2_4 <td> 16 <td> 0.00391 <td> 16777216 <td> 194 <td> 0.5
+ * <tr><td>5h <td> RTC_PRESCALE_DIV_2_5 <td> 32 <td> 0.00781 <td> 33554432 <td> 388 <td> 1.1
+ * <tr><td>6h <td> RTC_PRESCALE_DIV_2_6 <td> 64 <td> 0.01563 <td> 67108864 <td> 777 <td> 2.2
+ * <tr><td>7h <td> RTC_PRESCALE_DIV_2_7 <td> 128 <td> 0.03125 <td> 134217728 <td> 1553 <td> 4.4
+ * <tr><td>8h <td> RTC_PRESCALE_DIV_2_8 <td> 256 <td> 0.06250 <td> 268435456 <td> 3107 <td> 8.7
+ * <tr><td>9h <td> RTC_PRESCALE_DIV_2_9 <td> 512 <td> 0.12500 <td> 536870912 <td> 6214 <td> 17.5
+ * <tr><td>Ah <td> RTC_PRESCALE_DIV_2_10 <td> 1024 <td> 0.25000 <td> 1073741824 <td> 12428 <td> 34.9
+ * <tr><td>Bh <td> RTC_PRESCALE_DIV_2_11 <td> 2048 <td> 0.50000 <td> 2147483648 <td> 24855 <td> 69.8
+ * <tr><td>Ch <td> RTC_PRESCALE_DIV_2_12 <td> 4096 <td> 1.00000 <td> 4294967296 <td> 49710 <td> 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$ \big((Count_{prescaler}\,\&\,Prescale\,Mask) == 0\big) \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 number of ticks for snooze mode. See RTC_Snooze().
+ * @param count Sets the count used for snoozing when snooze mode is enabled and
+ * the snooze flag is set.
+ * @retval E_NO_ERROR If snooze value is set correctly and value is valid.
+ * @retval E_INVALID If 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 Snooze Count that is currently loaded in the RTC timer
+ * @details Returns the current value for the Snooze. This value is used as
+ * part of the snooze calculation depending on the snooze mode. @see RTC_SetSnoozeMode
+ * @retval uint32_t value of the snooze register
+ *
+ */
+__STATIC_INLINE uint32_t RTC_GetSnoozeCount(void)
+{
+ return MXC_RTCTMR->snz_val;
+}
+
+/**
+ * @brief Set the flags to activate the snooze
+ * @details Begins a snooze of the RTC. When this function is called
+ * the snooze count is determined based on the snooze mode.
+ * 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>
+ * \a count is the value of the RTC counter when RTC_Snooze() is called to begin snooze
+ */
+__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 defined by the mask 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 \\ Snooze<td>MXC_F_RTC_INTEN_COMP1
+ * <tr><td>Prescale Comp<td>MXC_F_RTC_FLAGS_INTEN_COMP
+ * <tr><td>RTC Count Overflow<td>MXC_F_RTC_INTEN_OVERFLOW
+ * <tr><td>Trim<td>MXC_F_RTC_INTEN_TRIM
+ * </table>
+ * @param mask set the bits of the interrupts to enable
+ */
+__STATIC_INLINE void RTC_EnableINT(uint32_t mask)
+{
+ MXC_RTCTMR->inten |= mask;
+}
+
+/**
+ * @brief Disable RTC interrupts based on the mask, See @ref RTC_interrupts
+ *
+ * @param mask set the bits of the interrupts to disable
+ */
+__STATIC_INLINE void RTC_DisableINT(uint32_t mask)
+{
+ MXC_RTCTMR->inten &= ~mask;
+}
+
+/**
+ * @brief Gets the RTC's interrupt flags
+ *
+ * @retval uint32_t interrupt flags
+ */
+__STATIC_INLINE uint32_t RTC_GetFlags(void)
+{
+ return (MXC_RTCTMR->flags);
+}
+
+/**
+ * @brief Clears the RTC's interrupt flags based on the mask provided
+ *
+ * @param mask masked used to clear individual interrupt flags
+ */
+__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
+ *
+ * @retval 0 = no active transactions , nonzero = active transactions 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
+ * @note Ensure RTC is disabled prior to calling this function
+ *
+ * @param trim trim value - maximum trim value setting of 0x03FFFF
+ * @param trimSlow 1 = trim slow, 0 = trim fast
+ *
+ * @retval E_NO_ERROR Trim value is valid and set.
+ * @retval E_INVALID Trim value exceeds max trim.
+ * @retval E_BAD_STATE RTC is not disabled.
+ *
+ */
+int RTC_SetTrim(uint32_t trim, uint8_t trimSlow);
+
+/**
+ * @brief Gets the trim value currently set
+ * @note Ensure RTC is disabled prior to calling this function
+ *
+ * @retval uint32_t Current trim value of RTC.
+ */
+uint32_t RTC_GetTrim(void);
+
+/**
+ * @brief Enabled the trim.
+ * @note Ensure RTC is disabled prior to calling this function
+ * @retval E_NO_ERROR Trim enabled
+ * @retval E_INVALID
+ */
+int RTC_TrimEnable(void);
+
+/**
+ * @brief Disable the trim.
+ */
+void RTC_TrimDisable(void);
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTC_H */