/** * @file xmc_rtc.h * @date 2016-05-19 * * @cond ********************************************************************************************************************* * XMClib v2.1.12 - XMC Peripheral Driver Library * * Copyright (c) 2015-2017, Infineon Technologies AG * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification,are permitted provided that the * following conditions are met: * * Redistributions of source code must retain the above copyright notice, this list of conditions and the following * disclaimer. * * 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. * * Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote * products derived from this software without specific prior written permission. * * 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. * * To improve the quality of the software, users are encouraged to share modifications, enhancements or bug fixes with * Infineon Technologies AG dave@infineon.com). ********************************************************************************************************************* * * Change History * -------------- * * 2015-02-20: * - Initial * * 2015-05-20: * - Documentation updates
* - In xmc1_rtc file XMC_RTC_Init function * is modified by adding the RTC running condition check * * 2015-06-20: * - Removed version macros and declaration of GetDriverVersion API * * 2016-05-19: * - Added XMC_RTC_SetTimeStdFormat() and XMC_RTC_SetAlarmStdFormat() * * @endcond * */ #ifndef XMC_RTC_H #define XMC_RTC_H /********************************************************************************************************************* * HEADER FILES *********************************************************************************************************************/ #include #include /** * * @addtogroup XMClib XMC Peripheral Library * @{ */ /** * @addtogroup RTC * @brief RTC driver for XMC microcontroller family. * * Real-time clock (RTC) is a clock that keeps track of the current time. Precise * real time keeping is with a 32.768 KHz external crystal clock or a 32.768 KHz * high precision internal clock. It provides a periodic time based interrupt and * a programmable alarm interrupt on time match. It also supports wakeup from * hibernate. * * The RTC low level driver provides functions to configure and initialize the RTC * hardware peripheral. * * @{ */ /********************************************************************************************************************* * MACROS *********************************************************************************************************************/ /********************************************************************************************************************* * ENUMS *********************************************************************************************************************/ /** * Status return values for RTC low level driver */ typedef enum XMC_RTC_STATUS { XMC_RTC_STATUS_OK = 0U, /**< Operation successful */ XMC_RTC_STATUS_ERROR = 1U, /**< Operation unsuccessful */ XMC_RTC_STATUS_BUSY = 2U /**< Busy with a previous request */ } XMC_RTC_STATUS_t; /** * Events which enables interrupt request generation */ typedef enum XMC_RTC_EVENT { XMC_RTC_EVENT_PERIODIC_SECONDS = RTC_MSKSR_MPSE_Msk, /**< Mask value to enable an event on periodic seconds */ XMC_RTC_EVENT_PERIODIC_MINUTES = RTC_MSKSR_MPMI_Msk, /**< Mask value to enable an event on periodic seconds */ XMC_RTC_EVENT_PERIODIC_HOURS = RTC_MSKSR_MPHO_Msk, /**< Mask value to enable an event on periodic seconds */ XMC_RTC_EVENT_PERIODIC_DAYS = RTC_MSKSR_MPDA_Msk, /**< Mask value to enable an event on periodic seconds */ XMC_RTC_EVENT_PERIODIC_MONTHS = RTC_MSKSR_MPMO_Msk, /**< Mask value to enable an event on periodic seconds */ XMC_RTC_EVENT_PERIODIC_YEARS = RTC_MSKSR_MPYE_Msk, /**< Mask value to enable an event on periodic seconds */ XMC_RTC_EVENT_ALARM = RTC_MSKSR_MAI_Msk /**< Mask value to enable an event on periodic seconds */ } XMC_RTC_EVENT_t; /** * Months used to program the date */ typedef enum XMC_RTC_MONTH { XMC_RTC_MONTH_JANUARY = 0U, XMC_RTC_MONTH_FEBRUARY = 1U, XMC_RTC_MONTH_MARCH = 2U, XMC_RTC_MONTH_APRIL = 3U, XMC_RTC_MONTH_MAY = 4U, XMC_RTC_MONTH_JUNE = 5U, XMC_RTC_MONTH_JULY = 6U, XMC_RTC_MONTH_AUGUST = 7U, XMC_RTC_MONTH_SEPTEMBER = 8U, XMC_RTC_MONTH_OCTOBER = 9U, XMC_RTC_MONTH_NOVEMBER = 10U, XMC_RTC_MONTH_DECEMBER = 11U } XMC_RTC_MONTH_t; /** * Week days used program the date */ typedef enum XMC_RTC_WEEKDAY { XMC_RTC_WEEKDAY_SUNDAY = 0U, XMC_RTC_WEEKDAY_MONDAY = 1U, XMC_RTC_WEEKDAY_TUESDAY = 2U, XMC_RTC_WEEKDAY_WEDNESDAY = 3U, XMC_RTC_WEEKDAY_THURSDAY = 4U, XMC_RTC_WEEKDAY_FRIDAY = 5U, XMC_RTC_WEEKDAY_SATURDAY = 6U } XMC_RTC_WEEKDAY_t; /********************************************************************************************************************* * DATA STRUCTURES *********************************************************************************************************************/ /*Anonymous structure/union guard start*/ #if defined(__CC_ARM) #pragma push #pragma anon_unions #elif defined(__TASKING__) #pragma warning 586 #endif /** * Alarm time values of RTC
* * The structure presents a convenient way to set/obtain the * alarm time values for seconds, minutes, hours, days, month and year of RTC. * The XMC_RTC_SetAlarm() and XMC_RTC_GetAlarm() can be * used to populate the structure with the alarm time value of * RTC */ typedef struct XMC_RTC_ALARM { union { uint32_t raw0; struct { uint32_t seconds : 6; /**< Alarm seconds compare value (0-59: Above this causes this bitfield to be set with 0)*/ uint32_t : 2; uint32_t minutes : 6; /**< Alarm minutes compare value (0-59: Above this causes this bitfield to be set with 0)*/ uint32_t : 2; uint32_t hours : 5; /**< Alarm hours compare value (0-23: Above this causes this bitfield to be set with 0)*/ uint32_t : 3; uint32_t days : 5; /**< Alarm days compare value (0-Actual days of month: Above this causes this bitfield to be set with 0)*/ uint32_t : 3; }; }; union { uint32_t raw1; struct { uint32_t : 8; uint32_t month : 4; /**< Alarm month compare value (0-11: Above this causes this bitfield to be set with 0) */ uint32_t : 4; uint32_t year : 16; /**< Alarm year compare value */ }; }; } XMC_RTC_ALARM_t; /** * Time values of RTC
* * The structure presents a convenient way to set/obtain the * time values for seconds, minutes, hours, days, month and year of RTC. * The XMC_RTC_SetTime() and XMC_RTC_GetTime() can be * used to populate the structure with the time value of * RTC */ typedef struct XMC_RTC_TIME { union { uint32_t raw0; struct { uint32_t seconds : 6; /**< Seconds time value (0-59: Above this causes this bitfield to be set with 0) */ uint32_t : 2; uint32_t minutes : 6; /**< Minutes time value (0-59: Above this causes this bitfield to be set with 0) */ uint32_t : 2; uint32_t hours : 5; /**< Hours time value (0-23: Above this causes this bitfield to be set with 0) */ uint32_t : 3; uint32_t days : 5; /**< Days time value (0-Actual days of month: Above this causes this bitfield to be set with 0)*/ uint32_t : 3; }; }; union { uint32_t raw1; struct { uint32_t daysofweek : 3; /**< Days of week time value (0-6: Above this causes this bitfield to be set with 0) */ uint32_t : 5; uint32_t month : 4; /**< Month time value (0-11: Above this causes this bitfield to be set with 0) */ uint32_t : 4; uint32_t year : 16; /**< Year time value */ }; }; } XMC_RTC_TIME_t; /*Anonymous structure/union guard end*/ #if defined(__CC_ARM) #pragma pop #elif defined(__TASKING__) #pragma warning restore #endif /** * RTC initialization with time, alarm and clock divider(prescaler) configurations
* * The structure presents a convenient way to set/obtain the time and alarm configurations * for RTC. The XMC_RTC_Init() can be used to populate the structure with the time and alarm * values of RTC. */ typedef struct XMC_RTC_CONFIG { XMC_RTC_TIME_t time; XMC_RTC_ALARM_t alarm; uint16_t prescaler; } XMC_RTC_CONFIG_t; /******************************************************************************* * EXTENSIONS *******************************************************************************/ #if UC_FAMILY == XMC1 #include "xmc1_rtc.h" #endif #if UC_FAMILY == XMC4 #include "xmc4_rtc.h" #endif /******************************************************************************* * API PROTOTYPES *********************************************************************************************************************/ #ifdef __cplusplus extern "C" { #endif /** * @param config Constant pointer to a constant ::XMC_RTC_CONFIG_t structure containing the * time, alarm time and clock divider(prescaler) configuration. * @return XMC_RTC_STATUS_t Always returns XMC_RTC_STATUS_OK (It contains only register assignment statements) * * \parDescription:
* Initialize the RTC peripheral
* * \par \if XMC4 * The function enables the hibernate domain for accessing RTC peripheral registers, configures * internal clock divider, time and alarm values by writing to the CTR.DIV, TIM0, TIM1, ATIM0 and * ATIM1 registers. * \endif * * \if XMC1 * The function ungates the peripheral clock for RTC, configures * internal clock divider, time and alarm values by writing to the CTR.DIV, TIM0, TIM1, ATIM0 and * ATIM1 registers. * \endif */ XMC_RTC_STATUS_t XMC_RTC_Init(const XMC_RTC_CONFIG_t *const config); /** * @return None * * \parDescription
* Enables RTC peripheral for programming its registers
* * \par \if XMC4 * Enables the hibernate domain for accessing RTC peripheral registers. * \endif * * \if XMC1 * Ungates the peripheral clock. * \endif * * \parRelated APIs:
* XMC_RTC_Disable(), XMC_SCU_RESET_DeassertPeripheralReset() */ void XMC_RTC_Enable(void); /** * @return None * * \parDescription
* Disables RTC peripheral for programming its registers
* * \par \if XMC4 * Empty function (Hibernate domain is not disabled). * \endif * * \if XMC1 * Gates the peripheral clock. * \endif * * \parRelated APIs:
* XMC_RTC_Enable(), XMC_SCU_RESET_AssertPeripheralReset() */ void XMC_RTC_Disable(void); /** * @return None * * \parDescription
* Checks RTC peripheral is enabled for programming its registers
* * \par \if XMC4 * Checks the hibernate domain is enabled or not. * \endif * * \if XMC1 * Checks peripheral clock is ungated or not. * \endif * * \parRelated APIs:
* XMC_RTC_Enable(), XMC_RTC_Disable(), XMC_SCU_RESET_DeassertPeripheralReset(), * XMC_SCU_RESET_AssertPeripheralReset() */ bool XMC_RTC_IsEnabled(void); /** * @return None * * \parDescription
* Enables RTC peripheral to start counting time
* * \par * The function starts the RTC for counting time by setting * CTR.ENB bit. Before starting the RTC, it should not be in * running mode and also hibernate domain should be enabled. * * \parRelated APIs:
* XMC_RTC_Enable(), XMC_RTC_Stop(), XMC_SCU_RESET_DeassertPeripheralReset() */ void XMC_RTC_Start(void); /** * @return None * * \parDescription
* Disables RTC peripheral to start counting time
* * \par * The function stops the RTC for counting time by resetting * CTR.ENB. Before stopping the RTC, hibernate domain should be enabled. * * \parRelated APIs:
* XMC_RTC_Enable(), XMC_RTC_Start(), XMC_SCU_RESET_AssertPeripheralReset() */ void XMC_RTC_Stop(void); /** * @param prescaler Prescaler value to be set * @return None * * \parDescription:
* Sets the RTC module prescaler value
* * \par * The function sets the CTR.DIV bitfield to configure the prescalar value. * The default value for the prescalar with the 32.768kHz crystal (or the internal clock) * is 7FFFH for a time interval of 1 sec. Before setting the prescaler value RTC should be * in stop mode and hibernate domain should be enabled. * * \parRelated APIs:
* XMC_RTC_Stop(), XMC_RTC_Enable(), XMC_RTC_GetPrescaler() */ void XMC_RTC_SetPrescaler(uint16_t prescaler); /** * @return None * * \parDescription:
* Gets the RTC module prescaler value
* * \par * The function reads the CTR.DIV bitfield to get the prescalar value. The default value * for the prescalar with the 32.768kHz crystal (or the internal clock) is 7FFFH for a * time interval of 1 sec. * * \parRelated APIs:
* XMC_RTC_SetPrescaler() */ __STATIC_INLINE uint32_t XMC_RTC_GetPrescaler(void) { return (uint32_t)(((uint32_t)RTC->CTR & (uint32_t)RTC_CTR_DIV_Msk) >> (uint32_t)RTC_CTR_DIV_Pos); } /** * @param timeval Contstant pointer to a constant ::XMC_RTC_TIME_t structure containing the * time parameters seconds, minutes, hours, days, daysofweek, month and year. * @return None * * \parDescription:
* Sets the RTC module time values
* * \par * The function sets the TIM0, TIM1 registers with time values. * The values can only be written when RTC is disabled. * See the structure ::XMC_RTC_TIME_t for the valid range of time value parameters.
* * \parRelated APIs:
* XMC_RTC_GetTime(), XMC_RTC_Stop() */ void XMC_RTC_SetTime(const XMC_RTC_TIME_t *const timeval); /** * @param time Pointer to a constant ::XMC_RTC_TIME_t structure containing the time parameters * seconds, minutes, hours, days, daysofweek, month and year. * @return None * * \parDescription:
* Gets the RTC module time value
* * \par * The function gets the time values from TIM0, TIM1 registers. * See the structure ::XMC_RTC_TIME_t for the valid range of time value parameters.
* * \parRelated APIs:
* XMC_RTC_SetTime() */ void XMC_RTC_GetTime(XMC_RTC_TIME_t *const time); /** * @param stdtime Pointer to a ::tm structure containing the time parameters seconds, * minutes, hours, days, daysofweek, month, year(since 1900) and days in a * year in standard format. * @return None * * \parDescription:
* Sets the RTC module time value in standard format
* * \par * The function sets the time values from TIM0, TIM1 registers. * * \parRelated APIs:
* XMC_RTC_SetTime(), XMC_RTC_GetTime() */ void XMC_RTC_SetTimeStdFormat(const struct tm *const stdtime); /** * @param stdtime Pointer to a constant ::tm structure containing the time parameters seconds, * minutes, hours, days, daysofweek, month, year(since 1900) and days in a * year in standard format. * @return None * * \parDescription:
* Gets the RTC module time value in standard format
* * \par * The function gets the time values from TIM0, TIM1 registers. * See the structure ::XMC_RTC_TIME_t for the valid range of time value parameters.
* For days the valid range is (1 - Actual days of month), year (since 1900) and * daysinyear (0 -365). * * \parRelated APIs:
* XMC_RTC_SetTime(), XMC_RTC_GetTime() */ void XMC_RTC_GetTimeStdFormat(struct tm *const stdtime); /** * @param alarm Constant pointer to a constant ::XMC_RTC_ALARM_t structure containing the * alarm time parameters alarm seconds, alarm minutes, alarm hours, alarm days, * alarm daysofweek, alarm month and alarm year. * @return None * * \parDescription:
* Sets the RTC module alarm time value
* * \par * The function sets the ATIM0, ATIM1 registers with alarm time values. * See the structure ::XMC_RTC_ALARM_t for the valid range of alarm time value parameters.
* * \parRelated APIs:
* XMC_RTC_GetAlarm() */ void XMC_RTC_SetAlarm(const XMC_RTC_ALARM_t *const alarm); /** * @param alarm Pointer to a constant ::XMC_RTC_ALARM_t structure containing the * time parameters alarm seconds, alarm minutes, alarm hours, alarm days, * alarm daysofweek, alarm month and alarm year. * @return None * * \parDescription:
* Gets the RTC module alarm time value
* * \par * The function gets the alarm time values from ATIM0, ATIM1 registers. * See the structure ::XMC_RTC_ALARM_t for the valid range of alarm time value parameters.
* * \parRelated APIs:
* XMC_RTC_SetAlarm() */ void XMC_RTC_GetAlarm(XMC_RTC_ALARM_t *const alarm); /** * @param stdtime Pointer to a ::tm structure containing the time parameters alarm seconds, * alarm minutes, alarm hours, alarm days, alarm daysofweek, alarm month, * alarm year(since 1900) and alarm days in a year in standard format. * @return None * * \parDescription:
* Sets the RTC module alarm time value in standard format
* * \par * The function sets the alarm time values from ATIM0, ATIM1 registers. * * \parRelated APIs:
* XMC_RTC_SetAlarm(), XMC_RTC_GetAlarm() */ void XMC_RTC_SetAlarmStdFormat(const struct tm *const stdtime); /** * @param stdtime Pointer to a constant ::tm structure containing the time parameters alarm seconds, * alarm minutes, alarm hours, alarm days, alarm daysofweek, alarm month, * alarm year(since 1900) and alarm days in a year in standard format. * @return None * * \parDescription:
* Gets the RTC module alarm time value in standard format
* * \par * The function gets the alarm time values from ATIM0, ATIM1 registers. * See the structure ::XMC_RTC_ALARM_t for the valid range of alarm time value parameters.
* For days the valid range is (1 - Actual days of month), year (since 1900) and * daysinyear (0 -365). * * \parRelated APIs:
* XMC_RTC_SetAlarm(), XMC_RTC_GetAlarm() */ void XMC_RTC_GetAlarmStdFormat(struct tm *const stdtime); /** * @param event A valid RTC event (::XMC_RTC_EVENT_t) or a valid combination of * logically OR'd events * @return None * * \parDescription:
* Enable RTC periodic and alarm event(s)
* * \par * The function sets the bitfields of MSKSR register to enable interrupt generation * for requested RTC event(s). * Setting the masking value for the event(s) containing in the ::XMC_RTC_EVENT_t leads * to a generation of the interrupt. * * \parRelated APIs:
* XMC_RTC_DisableEvent() */ void XMC_RTC_EnableEvent(const uint32_t event); /** * @param event A valid RTC event (::XMC_RTC_EVENT_t) or a valid combination of * logically OR'd events * @return None * * \parDescription:
* Disable RTC periodic and alarm event(s)
* * \par * The function resets the bitfields of MSKSR register to disable interrupt generation * for requested RTC event(s). * Resetting the masking value for the the event(s) containing in the ::XMC_RTC_EVENT_t blocks * the generation of the interrupt. * * \parRelated APIs:
* XMC_RTC_EnableEvent() */ void XMC_RTC_DisableEvent(const uint32_t event); /** * @param event A valid RTC event (::XMC_RTC_EVENT_t) or a valid combination of * logically OR'd events * @return None * * \parDescription:
* Clears periodic and alarm event(s) status
* * \par * The function sets the bitfields of CLRSR register to clear status bits in RAWSTAT and STSSR registers. * Setting the value for the the RTC event(s) containing in the ::XMC_RTC_EVENT_t clears the * corresponding status bits in RAWSTAT and STSSR registers. * * \parRelated APIs:
* XMC_RTC_GetEventStatus() */ void XMC_RTC_ClearEvent(const uint32_t event); /** * @return None * * \parDescription:
* Gets the RTC periodic and alarm event(s) status
* * \par * The function reads the bitfields of STSSR register * to get the status of RTC events. * Reading the value of the register STSSR gives the status of the event(s) containing in the ::XMC_RTC_EVENT_t. * * \parRelated APIs:
* XMC_RTC_ClearEvent() */ uint32_t XMC_RTC_GetEventStatus(void); /** * @return bool true if RTC is running * false if RTC is not running * * \parDescription:
* Checks the running status of the RTC
* * \par * The function reads the bitfield ENB of CTR register * to get the running status of RTC. * * \parRelated APIs:
* XMC_RTC_Start(), XMC_RTC_Stop() */ __STATIC_INLINE bool XMC_RTC_IsRunning(void) { return (bool)(RTC->CTR & RTC_CTR_ENB_Msk); } #ifdef __cplusplus } #endif /** * @} */ /** * @} */ #endif /* XMC_RTC_H */