/* * Copyright (c) 2016, Freescale Semiconductor, Inc. * Copyright 2017-2021, NXP * All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include "fsl_snvs_lp.h" /******************************************************************************* * Definitions ******************************************************************************/ /* Component ID definition, used by tools. */ #ifndef FSL_COMPONENT_ID #define FSL_COMPONENT_ID "platform.drivers.snvs_lp" #endif #define SECONDS_IN_A_DAY (86400U) #define SECONDS_IN_A_HOUR (3600U) #define SECONDS_IN_A_MINUTE (60U) #define DAYS_IN_A_YEAR (365U) #define YEAR_RANGE_START (1970U) #define YEAR_RANGE_END (2099U) #define SNVS_DEFAULT_PGD_VALUE (0x41736166U) /******************************************************************************* * Prototypes ******************************************************************************/ /*! * @brief Checks whether the date and time passed in is valid * * @param datetime Pointer to structure where the date and time details are stored * * @return Returns false if the date & time details are out of range; true if in range */ static bool SNVS_LP_CheckDatetimeFormat(const snvs_lp_srtc_datetime_t *datetime); /*! * @brief Converts time data from datetime to seconds * * @param datetime Pointer to datetime structure where the date and time details are stored * * @return The result of the conversion in seconds */ static uint32_t SNVS_LP_ConvertDatetimeToSeconds(const snvs_lp_srtc_datetime_t *datetime); /*! * @brief Converts time data from seconds to a datetime structure * * @param seconds Seconds value that needs to be converted to datetime format * @param datetime Pointer to the datetime structure where the result of the conversion is stored */ static void SNVS_LP_ConvertSecondsToDatetime(uint32_t seconds, snvs_lp_srtc_datetime_t *datetime); /*! * @brief Returns SRTC time in seconds. * * This function is used internally to get actual SRTC time in seconds. * * @param base SNVS peripheral base address * * @return SRTC time in seconds */ static uint32_t SNVS_LP_SRTC_GetSeconds(SNVS_Type *base); #if (!(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && \ defined(SNVS_LP_CLOCKS)) /*! * @brief Get the SNVS instance from peripheral base address. * * @param base SNVS peripheral base address. * * @return SNVS instance. */ static uint32_t SNVS_LP_GetInstance(SNVS_Type *base); #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ /******************************************************************************* * Variables ******************************************************************************/ #if (!(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && \ defined(SNVS_LP_CLOCKS)) /*! @brief Pointer to snvs_lp clock. */ const clock_ip_name_t s_snvsLpClock[] = SNVS_LP_CLOCKS; #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ /******************************************************************************* * Code ******************************************************************************/ static bool SNVS_LP_CheckDatetimeFormat(const snvs_lp_srtc_datetime_t *datetime) { assert(datetime != NULL); /* Table of days in a month for a non leap year. First entry in the table is not used, * valid months start from 1 */ uint8_t daysPerMonth[] = {0U, 31U, 28U, 31U, 30U, 31U, 30U, 31U, 31U, 30U, 31U, 30U, 31U}; /* Check year, month, hour, minute, seconds */ if ((datetime->year < YEAR_RANGE_START) || (datetime->year > YEAR_RANGE_END) || (datetime->month > 12U) || (datetime->month < 1U) || (datetime->hour >= 24U) || (datetime->minute >= 60U) || (datetime->second >= 60U)) { /* If not correct then error*/ return false; } /* Adjust the days in February for a leap year */ if ((((datetime->year & 3U) == 0U) && (datetime->year % 100U != 0U)) || (datetime->year % 400U == 0U)) { daysPerMonth[2] = 29U; } /* Check the validity of the day */ if ((datetime->day > daysPerMonth[datetime->month]) || (datetime->day < 1U)) { return false; } return true; } static uint32_t SNVS_LP_ConvertDatetimeToSeconds(const snvs_lp_srtc_datetime_t *datetime) { assert(datetime != NULL); /* Number of days from begin of the non Leap-year*/ /* Number of days from begin of the non Leap-year*/ uint16_t monthDays[] = {0U, 0U, 31U, 59U, 90U, 120U, 151U, 181U, 212U, 243U, 273U, 304U, 334U}; uint32_t seconds; /* Compute number of days from 1970 till given year*/ seconds = ((uint32_t)datetime->year - 1970U) * DAYS_IN_A_YEAR; /* Add leap year days */ seconds += (((uint32_t)datetime->year / 4U) - (1970U / 4U)); /* Add number of days till given month*/ seconds += monthDays[datetime->month]; /* Add days in given month. We subtract the current day as it is * represented in the hours, minutes and seconds field*/ seconds += ((uint32_t)datetime->day - 1U); /* For leap year if month less than or equal to Febraury, decrement day counter*/ if ((0U == (datetime->year & 3U)) && (datetime->month <= 2U)) { seconds--; } seconds = (seconds * SECONDS_IN_A_DAY) + (datetime->hour * SECONDS_IN_A_HOUR) + (datetime->minute * SECONDS_IN_A_MINUTE) + datetime->second; return seconds; } static void SNVS_LP_ConvertSecondsToDatetime(uint32_t seconds, snvs_lp_srtc_datetime_t *datetime) { assert(datetime != NULL); uint32_t x; uint32_t secondsRemaining, days; uint16_t daysInYear; /* Table of days in a month for a non leap year. First entry in the table is not used, * valid months start from 1 */ uint8_t daysPerMonth[] = {0U, 31U, 28U, 31U, 30U, 31U, 30U, 31U, 31U, 30U, 31U, 30U, 31U}; /* Start with the seconds value that is passed in to be converted to date time format */ secondsRemaining = seconds; /* Calcuate the number of days, we add 1 for the current day which is represented in the * hours and seconds field */ days = secondsRemaining / SECONDS_IN_A_DAY + 1U; /* Update seconds left*/ secondsRemaining = secondsRemaining % SECONDS_IN_A_DAY; /* Calculate the datetime hour, minute and second fields */ datetime->hour = (uint8_t)(secondsRemaining / SECONDS_IN_A_HOUR); secondsRemaining = secondsRemaining % SECONDS_IN_A_HOUR; datetime->minute = (uint8_t)(secondsRemaining / 60U); datetime->second = (uint8_t)(secondsRemaining % SECONDS_IN_A_MINUTE); /* Calculate year */ daysInYear = DAYS_IN_A_YEAR; datetime->year = YEAR_RANGE_START; while (days > daysInYear) { /* Decrease day count by a year and increment year by 1 */ days -= daysInYear; datetime->year++; /* Adjust the number of days for a leap year */ if ((datetime->year & 3U) != 0U) { daysInYear = DAYS_IN_A_YEAR; } else { daysInYear = DAYS_IN_A_YEAR + 1U; } } /* Adjust the days in February for a leap year */ if (0U == (datetime->year & 3U)) { daysPerMonth[2] = 29U; } for (x = 1U; x <= 12U; x++) { if (days <= daysPerMonth[x]) { datetime->month = (uint8_t)x; break; } else { days -= daysPerMonth[x]; } } datetime->day = (uint8_t)days; } #if (!(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && \ defined(SNVS_LP_CLOCKS)) static uint32_t SNVS_LP_GetInstance(SNVS_Type *base) { return 0U; } #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ /*! * brief Ungates the SNVS clock and configures the peripheral for basic operation. * * note This API should be called at the beginning of the application using the SNVS driver. * * param base SNVS peripheral base address * param config Pointer to the user's SNVS configuration structure. */ void SNVS_LP_Init(SNVS_Type *base) { #if (!(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && \ defined(SNVS_LP_CLOCKS)) uint32_t instance = SNVS_LP_GetInstance(base); CLOCK_EnableClock(s_snvsLpClock[instance]); #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ /* Power glitch detector: set the PGD/LVD value and clear the previous status. */ #if defined(SNVS_LPPGDR_PGD) base->LPPGDR = SNVS_DEFAULT_PGD_VALUE; base->LPSR = SNVS_LPSR_PGD_MASK; #elif defined(SNVS_LPLVDR_LVD) base->LPLVDR = SNVS_DEFAULT_PGD_VALUE; base->LPSR = SNVS_LPSR_LVD_MASK; #else #error "No power/voltage detector register defined" #endif } /*! * brief Deinit the SNVS LP section. * * param base SNVS peripheral base address */ void SNVS_LP_Deinit(SNVS_Type *base) { #if (!(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && \ defined(SNVS_LP_CLOCKS)) uint32_t instance = SNVS_LP_GetInstance(base); CLOCK_DisableClock(s_snvsLpClock[instance]); #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ } /*! * brief Ungates the SNVS clock and configures the peripheral for basic operation. * * note This API should be called at the beginning of the application using the SNVS driver. * * param base SNVS peripheral base address * param config Pointer to the user's SNVS configuration structure. */ void SNVS_LP_SRTC_Init(SNVS_Type *base, const snvs_lp_srtc_config_t *config) { assert(config != NULL); #if (!(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && \ defined(SNVS_LP_CLOCKS)) uint32_t instance = SNVS_LP_GetInstance(base); CLOCK_EnableClock(s_snvsLpClock[instance]); #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ if (config->srtcCalEnable) { base->LPCR = (base->LPCR & ~SNVS_LPCR_LPCALB_VAL_MASK) | SNVS_LPCR_LPCALB_VAL(config->srtcCalValue); base->LPCR |= SNVS_LPCR_LPCALB_EN_MASK; } #if defined(FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER) && (FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER > 0) int pin; for (pin = (int32_t)kSNVS_ExternalTamper1; pin <= (int32_t)SNVS_LP_MAX_TAMPER; pin++) { SNVS_LP_DisableExternalTamper(SNVS, (snvs_lp_external_tamper_t)pin); SNVS_LP_ClearExternalTamperStatus(SNVS, (snvs_lp_external_tamper_t)pin); } #endif /* defined(FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER) && (FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER > 0) */ } /*! * brief Stops the SRTC timer. * * param base SNVS peripheral base address */ void SNVS_LP_SRTC_Deinit(SNVS_Type *base) { base->LPCR &= ~SNVS_LPCR_SRTC_ENV_MASK; #if (!(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && \ defined(SNVS_LP_CLOCKS)) uint32_t instance = SNVS_LP_GetInstance(base); CLOCK_DisableClock(s_snvsLpClock[instance]); #endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ } /*! * brief Fills in the SNVS_LP config struct with the default settings. * * The default values are as follows. * code * config->srtccalenable = false; * config->srtccalvalue = 0U; * endcode * param config Pointer to the user's SNVS configuration structure. */ void SNVS_LP_SRTC_GetDefaultConfig(snvs_lp_srtc_config_t *config) { assert(config != NULL); /* Initializes the configure structure to zero. */ (void)memset(config, 0, sizeof(*config)); config->srtcCalEnable = false; config->srtcCalValue = 0U; } static uint32_t SNVS_LP_SRTC_GetSeconds(SNVS_Type *base) { uint32_t seconds = 0; uint32_t tmp = 0; /* Do consecutive reads until value is correct */ do { seconds = tmp; tmp = (base->LPSRTCMR << 17U); tmp |= (base->LPSRTCLR >> 15U); } while (tmp != seconds); return seconds; } /*! * brief Sets the SNVS SRTC date and time according to the given time structure. * * param base SNVS peripheral base address * param datetime Pointer to the structure where the date and time details are stored. * * return kStatus_Success: Success in setting the time and starting the SNVS SRTC * kStatus_InvalidArgument: Error because the datetime format is incorrect */ status_t SNVS_LP_SRTC_SetDatetime(SNVS_Type *base, const snvs_lp_srtc_datetime_t *datetime) { assert(datetime != NULL); uint32_t seconds = 0U; uint32_t tmp = base->LPCR; /* disable RTC */ SNVS_LP_SRTC_StopTimer(base); /* Return error if the time provided is not valid */ if (!(SNVS_LP_CheckDatetimeFormat(datetime))) { return kStatus_InvalidArgument; } /* Set time in seconds */ seconds = SNVS_LP_ConvertDatetimeToSeconds(datetime); base->LPSRTCMR = (uint32_t)(seconds >> 17U); base->LPSRTCLR = (uint32_t)(seconds << 15U); /* reenable SRTC in case that it was enabled before */ if ((tmp & SNVS_LPCR_SRTC_ENV_MASK) != 0U) { SNVS_LP_SRTC_StartTimer(base); } return kStatus_Success; } /*! * brief Gets the SNVS SRTC time and stores it in the given time structure. * * param base SNVS peripheral base address * param datetime Pointer to the structure where the date and time details are stored. */ void SNVS_LP_SRTC_GetDatetime(SNVS_Type *base, snvs_lp_srtc_datetime_t *datetime) { assert(datetime != NULL); SNVS_LP_ConvertSecondsToDatetime(SNVS_LP_SRTC_GetSeconds(base), datetime); } /*! * brief Sets the SNVS SRTC alarm time. * * The function sets the SRTC alarm. It also checks whether the specified alarm * time is greater than the present time. If not, the function does not set the alarm * and returns an error. * Please note, that SRTC alarm has limited resolution because only 32 most * significant bits of SRTC counter are compared to SRTC Alarm register. * If the alarm time is beyond SRTC resolution, the function does not set the alarm * and returns an error. * * param base SNVS peripheral base address * param alarmTime Pointer to the structure where the alarm time is stored. * * return kStatus_Success: success in setting the SNVS SRTC alarm * kStatus_InvalidArgument: Error because the alarm datetime format is incorrect * kStatus_Fail: Error because the alarm time has already passed or is beyond resolution */ status_t SNVS_LP_SRTC_SetAlarm(SNVS_Type *base, const snvs_lp_srtc_datetime_t *alarmTime) { assert(alarmTime != NULL); uint32_t alarmSeconds = 0U; uint32_t currSeconds = 0U; uint32_t tmp = base->LPCR; /* Return error if the alarm time provided is not valid */ if (!(SNVS_LP_CheckDatetimeFormat(alarmTime))) { return kStatus_InvalidArgument; } alarmSeconds = SNVS_LP_ConvertDatetimeToSeconds(alarmTime); currSeconds = SNVS_LP_SRTC_GetSeconds(base); /* Return error if the alarm time has passed */ if (alarmSeconds <= currSeconds) { return kStatus_Fail; } /* disable SRTC alarm interrupt */ base->LPCR &= ~SNVS_LPCR_LPTA_EN_MASK; while ((base->LPCR & SNVS_LPCR_LPTA_EN_MASK) != 0U) { } /* Set alarm in seconds*/ base->LPTAR = alarmSeconds; /* reenable SRTC alarm interrupt in case that it was enabled before */ base->LPCR = tmp; return kStatus_Success; } /*! * brief Returns the SNVS SRTC alarm time. * * param base SNVS peripheral base address * param datetime Pointer to the structure where the alarm date and time details are stored. */ void SNVS_LP_SRTC_GetAlarm(SNVS_Type *base, snvs_lp_srtc_datetime_t *datetime) { assert(datetime != NULL); uint32_t alarmSeconds = 0U; /* Get alarm in seconds */ alarmSeconds = base->LPTAR; SNVS_LP_ConvertSecondsToDatetime(alarmSeconds, datetime); } /*! * brief Gets the SNVS status flags. * * param base SNVS peripheral base address * * return The status flags. This is the logical OR of members of the * enumeration ::snvs_status_flags_t */ uint32_t SNVS_LP_SRTC_GetStatusFlags(SNVS_Type *base) { uint32_t flags = 0U; if ((base->LPSR & SNVS_LPSR_LPTA_MASK) != 0U) { flags |= (uint32_t)kSNVS_SRTC_AlarmInterruptFlag; } return flags; } /*! * brief Gets the enabled SNVS interrupts. * * param base SNVS peripheral base address * * return The enabled interrupts. This is the logical OR of members of the * enumeration ::snvs_interrupt_enable_t */ uint32_t SNVS_LP_SRTC_GetEnabledInterrupts(SNVS_Type *base) { uint32_t val = 0U; if ((base->LPCR & SNVS_LPCR_LPTA_EN_MASK) != 0U) { val |= (uint32_t)kSNVS_SRTC_AlarmInterrupt; } return val; } /*! * brief Fills in the SNVS tamper pin config struct with the default settings. * * The default values are as follows. * code * config->polarity = 0U; * config->filterenable = 0U; * config->filter = 0U; * endcode * param config Pointer to the user's SNVS configuration structure. */ void SNVS_LP_PassiveTamperPin_GetDefaultConfig(snvs_lp_passive_tamper_t *config) { assert(config != NULL); /* Initializes the configure structure to zero. */ (void)memset(config, 0, sizeof(*config)); config->polarity = 0U; #if defined(FSL_FEATURE_SNVS_PASSIVE_TAMPER_FILTER) && (FSL_FEATURE_SNVS_PASSIVE_TAMPER_FILTER > 0) config->filterenable = 0U; config->filter = 0U; #endif /* FSL_FEATURE_SNVS_PASSIVE_TAMPER_FILTER */ } #if defined(FSL_FEATURE_SNVS_HAS_ACTIVE_TAMPERS) && (FSL_FEATURE_SNVS_HAS_ACTIVE_TAMPERS > 0) /*! * brief Fills in the SNVS tamper pin config struct with the default settings. * * The default values are as follows. * code * config->clock = kSNVS_ActiveTamper16HZ; * config->seed = 0U; * config->polynomial = 0U; * endcode * param config Pointer to the user's SNVS configuration structure. */ void SNVS_LP_TamperPinTx_GetDefaultConfig(tamper_active_tx_config_t *config) { assert(config != NULL); /* Initializes the configure structure to zero. */ (void)memset(config, 0, sizeof(*config)); config->clock = kSNVS_ActiveTamper16HZ; config->seed = 0U; config->polynomial = 0U; } /*! * brief Fills in the SNVS tamper pin config struct with the default settings. * * The default values are as follows. * code * config->filterenable = 0U; * config->filter = 0U; * config->tx = kSNVS_ActiveTamper1; * endcode * param config Pointer to the user's SNVS configuration structure. */ void SNVS_LP_TamperPinRx_GetDefaultConfig(tamper_active_rx_config_t *config) { assert(config != NULL); /* Initializes the configure structure to zero. */ (void)memset(config, 0, sizeof(*config)); config->filterenable = 0U; config->filter = 0U; config->activeTamper = kSNVS_ActiveTamper1; } #endif /* FSL_FEATURE_SNVS_HAS_ACTIVE_TAMPERS */ #if defined(FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER) && (FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER > 0) /*! * brief Enables the specified SNVS external tamper. * * param base SNVS peripheral base address * param pin SNVS external tamper pin * param config Configuration structure of external passive tamper */ void SNVS_LP_EnablePassiveTamper(SNVS_Type *base, snvs_lp_external_tamper_t pin, snvs_lp_passive_tamper_t config) { switch (pin) { case (kSNVS_ExternalTamper1): /* Set polarity */ if (config.polarity != 0U) { SNVS->LPTDCR |= SNVS_LPTDCR_ET1P_MASK; } else { SNVS->LPTDCR &= ~SNVS_LPTDCR_ET1P_MASK; } #if defined(FSL_FEATURE_SNVS_PASSIVE_TAMPER_FILTER) && (FSL_FEATURE_SNVS_PASSIVE_TAMPER_FILTER > 0) /* Enable filter and set it's value, dissable otherwise */ if (config.filterenable != 0U) { SNVS->LPTGFCR |= SNVS_LPTGFCR_ETGF1_EN_MASK; SNVS->LPTGFCR |= SNVS_LPTGFCR_ETGF1(config.filter); } else { SNVS->LPTGFCR &= ~SNVS_LPTGFCR_ETGF1_EN_MASK; } #endif /* FSL_FEATURE_SNVS_PASSIVE_TAMPER_FILTER */ /* enable tamper pin */ base->LPTDCR |= SNVS_LPTDCR_ET1_EN_MASK; break; #if defined(FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER) && (FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER > 1) case (kSNVS_ExternalTamper2): /* Set polarity */ base->LPTDCR = (base->LPTDCR & ~(SNVS_LPTDCR_ET2P_MASK)) | ((uint32_t)config.polarity << SNVS_LPTDCR_ET2P_SHIFT); /* Enable filter and set it's value, dissable otherwise */ if (config.filterenable != 0U) { SNVS->LPTGFCR |= SNVS_LPTGFCR_ETGF2_EN_MASK; SNVS->LPTGFCR |= SNVS_LPTGFCR_ETGF2(config.filter); } else { SNVS->LPTGFCR &= ~SNVS_LPTGFCR_ETGF2_EN_MASK; } /* enable tamper pin */ SNVS->LPTDCR |= SNVS_LPTDCR_ET2_EN_MASK; break; case (kSNVS_ExternalTamper3): /* Set polarity */ base->LPTDC2R = (base->LPTDC2R & ~(SNVS_LPTDC2R_ET3P_MASK)) | ((uint32_t)config.polarity << SNVS_LPTDC2R_ET3P_SHIFT); /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF3(config.filter); /* Enable tamper 3 glitch filter */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF3_EN(1U); } /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET3_EN_MASK; break; case (kSNVS_ExternalTamper4): /* Set polarity */ base->LPTDC2R = (base->LPTDC2R & ~(SNVS_LPTDC2R_ET4P_MASK)) | ((uint32_t)config.polarity << SNVS_LPTDC2R_ET4P_SHIFT); /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF4(config.filter); /* Enable tamper 4 glitch filter */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF4_EN(1U); } /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET4_EN_MASK; break; case (kSNVS_ExternalTamper5): /* Set polarity */ base->LPTDC2R = (base->LPTDC2R & ~(SNVS_LPTDC2R_ET5P_MASK)) | ((uint32_t)config.polarity << SNVS_LPTDC2R_ET5P_SHIFT); /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF5(config.filter); /* Enable tamper 5 glitch filter */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF5_EN(1U); } /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET5_EN_MASK; break; case (kSNVS_ExternalTamper6): /* Set polarity */ base->LPTDC2R = (base->LPTDC2R & ~(SNVS_LPTDC2R_ET6P_MASK)) | ((uint32_t)config.polarity << SNVS_LPTDC2R_ET6P_SHIFT); /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF6(config.filter); /* Enable tamper 6 glitch filter */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF6_EN(1U); } /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET6_EN_MASK; break; case (kSNVS_ExternalTamper7): /* Set polarity */ base->LPTDC2R = (base->LPTDC2R & ~(SNVS_LPTDC2R_ET7P_MASK)) | ((uint32_t)config.polarity << SNVS_LPTDC2R_ET7P_SHIFT); /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF7(config.filter); /* Enable tamper 6 glitch filter */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF7_EN(1U); } /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET7_EN_MASK; break; case (kSNVS_ExternalTamper8): /* Set polarity */ base->LPTDC2R = (base->LPTDC2R & ~(SNVS_LPTDC2R_ET8P_MASK)) | ((uint32_t)config.polarity << SNVS_LPTDC2R_ET8P_SHIFT); /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF8(config.filter); /* Enable tamper 8 glitch filter */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF8_EN(1U); } /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET8_EN_MASK; break; case (kSNVS_ExternalTamper9): /* Set polarity */ base->LPTDC2R = (base->LPTDC2R & ~(SNVS_LPTDC2R_ET9P_MASK)) | ((uint32_t)config.polarity << SNVS_LPTDC2R_ET9P_SHIFT); /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF9(config.filter); /* Enable tamper 9 glitch filter */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF9_EN(1U); } /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET9_EN_MASK; break; case (kSNVS_ExternalTamper10): /* Set polarity */ base->LPTDC2R = (base->LPTDC2R & ~(SNVS_LPTDC2R_ET10P_MASK)) | ((uint32_t)config.polarity << SNVS_LPTDC2R_ET10P_SHIFT); /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF10(config.filter); /* Enable tamper 10 glitch filter */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF10_EN(1U); } /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET10_EN_MASK; break; #endif default: /* All the cases have been listed above, the default clause should not be reached. */ break; } } /*! * brief Disables the specified SNVS external tamper. * * param base SNVS peripheral base address * param pin SNVS external tamper pin */ void SNVS_LP_DisableExternalTamper(SNVS_Type *base, snvs_lp_external_tamper_t pin) { switch (pin) { case (kSNVS_ExternalTamper1): base->LPTDCR &= ~SNVS_LPTDCR_ET1_EN_MASK; break; #if defined(FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER) && (FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER > 1) case (kSNVS_ExternalTamper2): base->LPTDCR &= ~SNVS_LPTDCR_ET2_EN_MASK; break; case (kSNVS_ExternalTamper3): base->LPTDC2R &= ~SNVS_LPTDC2R_ET3_EN_MASK; break; case (kSNVS_ExternalTamper4): base->LPTDC2R &= ~SNVS_LPTDC2R_ET4_EN_MASK; break; case (kSNVS_ExternalTamper5): base->LPTDC2R &= ~SNVS_LPTDC2R_ET5_EN_MASK; break; case (kSNVS_ExternalTamper6): base->LPTDC2R &= ~SNVS_LPTDC2R_ET6_EN_MASK; break; case (kSNVS_ExternalTamper7): base->LPTDC2R &= ~SNVS_LPTDC2R_ET7_EN_MASK; break; case (kSNVS_ExternalTamper8): base->LPTDC2R &= ~SNVS_LPTDC2R_ET8_EN_MASK; break; case (kSNVS_ExternalTamper9): base->LPTDC2R &= ~SNVS_LPTDC2R_ET9_EN_MASK; break; case (kSNVS_ExternalTamper10): base->LPTDC2R &= ~SNVS_LPTDC2R_ET10_EN_MASK; break; #endif default: /* All the cases have been listed above, the default clause should not be reached. */ break; } } /*! * brief Disable all external tamper. * * param base SNVS peripheral base address */ void SNVS_LP_DisableAllExternalTamper(SNVS_Type *base) { for (int pin = (int8_t)kSNVS_ExternalTamper1; pin <= (int8_t)SNVS_LP_MAX_TAMPER; pin++) { SNVS_LP_DisableExternalTamper(SNVS, (snvs_lp_external_tamper_t)pin); } } /*! * brief Returns status of the specified external tamper. * * param base SNVS peripheral base address * param pin SNVS external tamper pin * * return The status flag. This is the enumeration ::snvs_external_tamper_status_t */ snvs_lp_external_tamper_status_t SNVS_LP_GetExternalTamperStatus(SNVS_Type *base, snvs_lp_external_tamper_t pin) { snvs_lp_external_tamper_status_t status = kSNVS_TamperNotDetected; switch (pin) { case (kSNVS_ExternalTamper1): status = (bool)(base->LPSR & SNVS_LPSR_ET1D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; #if defined(FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER) && (FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER > 1) case (kSNVS_ExternalTamper2): status = (bool)(base->LPSR & SNVS_LPSR_ET2D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; case (kSNVS_ExternalTamper3): status = (bool)(base->LPTDSR & SNVS_LPTDSR_ET3D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; case (kSNVS_ExternalTamper4): status = (bool)(base->LPTDSR & SNVS_LPTDSR_ET4D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; case (kSNVS_ExternalTamper5): status = (bool)(base->LPTDSR & SNVS_LPTDSR_ET5D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; case (kSNVS_ExternalTamper6): status = (bool)(base->LPTDSR & SNVS_LPTDSR_ET6D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; case (kSNVS_ExternalTamper7): status = (bool)(base->LPTDSR & SNVS_LPTDSR_ET7D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; case (kSNVS_ExternalTamper8): status = (bool)(base->LPTDSR & SNVS_LPTDSR_ET8D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; case (kSNVS_ExternalTamper9): status = (bool)(base->LPTDSR & SNVS_LPTDSR_ET9D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; case (kSNVS_ExternalTamper10): status = (bool)(base->LPTDSR & SNVS_LPTDSR_ET10D_MASK) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; break; #endif default: /* All the cases have been listed above, the default clause should not be reached. */ break; } return status; } /*! * brief Clears status of the specified external tamper. * * param base SNVS peripheral base address * param pin SNVS external tamper pin */ void SNVS_LP_ClearExternalTamperStatus(SNVS_Type *base, snvs_lp_external_tamper_t pin) { base->LPSR |= SNVS_LPSR_ET1D_MASK; switch (pin) { case (kSNVS_ExternalTamper1): base->LPSR |= SNVS_LPSR_ET1D_MASK; break; #if defined(FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER) && (FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER > 1) case (kSNVS_ExternalTamper2): base->LPSR |= SNVS_LPSR_ET2D_MASK; break; case (kSNVS_ExternalTamper3): base->LPTDSR |= SNVS_LPTDSR_ET3D_MASK; break; case (kSNVS_ExternalTamper4): base->LPTDSR |= SNVS_LPTDSR_ET4D_MASK; break; case (kSNVS_ExternalTamper5): base->LPTDSR |= SNVS_LPTDSR_ET5D_MASK; break; case (kSNVS_ExternalTamper6): base->LPTDSR |= SNVS_LPTDSR_ET6D_MASK; break; case (kSNVS_ExternalTamper7): base->LPTDSR |= SNVS_LPTDSR_ET7D_MASK; break; case (kSNVS_ExternalTamper8): base->LPTDSR |= SNVS_LPTDSR_ET8D_MASK; break; case (kSNVS_ExternalTamper9): base->LPTDSR |= SNVS_LPTDSR_ET9D_MASK; break; case (kSNVS_ExternalTamper10): base->LPTDSR |= SNVS_LPTDSR_ET10D_MASK; break; #endif default: /* All the cases have been listed above, the default clause should not be reached. */ break; } } /*! * brief Clears status of the all external tamper. * * param base SNVS peripheral base address */ void SNVS_LP_ClearAllExternalTamperStatus(SNVS_Type *base) { for (int pin = (int8_t)kSNVS_ExternalTamper1; pin <= (int8_t)SNVS_LP_MAX_TAMPER; pin++) { SNVS_LP_ClearExternalTamperStatus(SNVS, (snvs_lp_external_tamper_t)pin); } } #endif /* (!(defined(FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER) && (FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER > 0)) */ #if defined(FSL_FEATURE_SNVS_HAS_ACTIVE_TAMPERS) && (FSL_FEATURE_SNVS_HAS_ACTIVE_TAMPERS > 0) /*! * brief Enable active tamper tx external pad * * param base SNVS peripheral base address * param pin SNVS external tamper pin */ status_t SNVS_LP_EnableTxActiveTamper(SNVS_Type *base, snvs_lp_active_tx_tamper_t pin, tamper_active_tx_config_t config) { status_t status = kStatus_Success; switch (pin) { case (kSNVS_ActiveTamper1): { /* Enable active tamper tx external pad */ base->LPATCTLR |= SNVS_LPATCTLR_AT1_PAD_EN_MASK; /* Set seed and polynomial */ base->LPATCR[0] |= SNVS_LPATCR_Seed(config.seed) | SNVS_LPATCR_Polynomial(config.polynomial); /* Set clock */ base->LPATCLKR |= SNVS_LPATCLKR_AT1_CLK_CTL(config.clock); /* Enable active tamper pin */ base->LPATCTLR |= SNVS_LPATCTLR_AT1_EN_MASK; break; } case (kSNVS_ActiveTamper2): { base->LPATCTLR |= SNVS_LPATCTLR_AT2_PAD_EN_MASK; base->LPATCR[1] |= SNVS_LPATCR_Seed(config.seed) | SNVS_LPATCR_Polynomial(config.polynomial); base->LPATCLKR |= SNVS_LPATCLKR_AT2_CLK_CTL(config.clock); base->LPATCTLR |= SNVS_LPATCTLR_AT2_EN_MASK; break; } case (kSNVS_ActiveTamper3): { base->LPATCTLR |= SNVS_LPATCTLR_AT3_PAD_EN_MASK; base->LPATCR[2] |= SNVS_LPATCR_Seed(config.seed) | SNVS_LPATCR_Polynomial(config.polynomial); base->LPATCLKR |= SNVS_LPATCLKR_AT3_CLK_CTL(config.clock); base->LPATCTLR |= SNVS_LPATCTLR_AT3_EN_MASK; break; } case (kSNVS_ActiveTamper4): { base->LPATCTLR |= SNVS_LPATCTLR_AT4_PAD_EN_MASK; base->LPATCR[3] |= SNVS_LPATCR_Seed(config.seed) | SNVS_LPATCR_Polynomial(config.polynomial); base->LPATCLKR |= SNVS_LPATCLKR_AT4_CLK_CTL(config.clock); base->LPATCTLR |= SNVS_LPATCTLR_AT4_EN_MASK; break; } case (kSNVS_ActiveTamper5): { base->LPATCTLR |= SNVS_LPATCTLR_AT5_PAD_EN_MASK; base->LPATCR[4] |= SNVS_LPATCR_Seed(config.seed) | SNVS_LPATCR_Polynomial(config.polynomial); base->LPATCLKR |= SNVS_LPATCLKR_AT5_CLK_CTL(config.clock); base->LPATCTLR |= SNVS_LPATCTLR_AT5_EN_MASK; break; } default: status = kStatus_InvalidArgument; /* All the cases have been listed above, the default clause should not be reached. */ break; } return status; } /*! * brief Enable active tamper rx external pad * * param base SNVS peripheral base address * param rx SNVS external RX tamper pin * param config SNVS RX tamper config structure */ status_t SNVS_LP_EnableRxActiveTamper(SNVS_Type *base, snvs_lp_external_tamper_t rx, tamper_active_rx_config_t config) { status_t status = kStatus_Success; switch (rx) { case (kSNVS_ExternalTamper1): /* Enable filter and set it's value, dissable otherwise */ if (config.filterenable != 0U) { SNVS->LPTGFCR |= SNVS_LPTGFCR_ETGF1_EN_MASK; SNVS->LPTGFCR |= SNVS_LPTGFCR_ETGF1(config.filter); } else { SNVS->LPTGFCR &= ~SNVS_LPTGFCR_ETGF1_EN_MASK; } /* Route TX to external tamper 1 */ base->LPATRC1R = SNVS_LPATRC1R_ET1RCTL(config.activeTamper); /* enable tamper pin */ base->LPTDCR |= SNVS_LPTDCR_ET1_EN_MASK; break; #if defined(FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER) && (FSL_FEATURE_SNVS_HAS_MULTIPLE_TAMPER > 1) case (kSNVS_ExternalTamper2): /* Enable filter and set it's value, dissable otherwise */ if (config.filterenable != 0U) { SNVS->LPTGFCR |= SNVS_LPTGFCR_ETGF2_EN_MASK; SNVS->LPTGFCR |= SNVS_LPTGFCR_ETGF2(config.filter); } else { SNVS->LPTGFCR &= ~SNVS_LPTGFCR_ETGF2_EN_MASK; } /* Route TX to external tamper 2 */ base->LPATRC1R = SNVS_LPATRC1R_ET2RCTL(config.activeTamper); /* enable tamper pin */ SNVS->LPTDCR |= SNVS_LPTDCR_ET2_EN_MASK; break; case (kSNVS_ExternalTamper3): /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF3(config.filter); /* Enable tamper 3 glitch filter */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF3_EN(1U); } /* Route TX to external tamper 3 */ base->LPATRC1R = SNVS_LPATRC1R_ET3RCTL(config.activeTamper); /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET3_EN_MASK; break; case (kSNVS_ExternalTamper4): /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF4(config.filter); /* Enable tamper 4 glitch filter */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF4_EN(1U); } /* Route TX to external tamper 4 */ base->LPATRC1R = SNVS_LPATRC1R_ET4RCTL(config.activeTamper); /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET4_EN_MASK; break; case (kSNVS_ExternalTamper5): /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF5(config.filter); /* Enable tamper 5 glitch filter */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF5_EN(1U); } /* Route TX to external tamper 5 */ base->LPATRC1R = SNVS_LPATRC1R_ET5RCTL(config.activeTamper); /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET5_EN_MASK; break; case (kSNVS_ExternalTamper6): /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF6(config.filter); /* Enable tamper 6 glitch filter */ SNVS->LPTGF1CR |= SNVS_LPTGF1CR_ETGF6_EN(1U); } /* Route TX to external tamper 6 */ base->LPATRC1R = SNVS_LPATRC1R_ET6RCTL(config.activeTamper); /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET6_EN_MASK; break; case (kSNVS_ExternalTamper7): /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF7(config.filter); /* Enable tamper 6 glitch filter */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF7_EN(1U); } /* Route TX to external tamper 7 */ base->LPATRC1R = SNVS_LPATRC1R_ET7RCTL(config.activeTamper); /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET7_EN_MASK; break; case (kSNVS_ExternalTamper8): /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF8(config.filter); /* Enable tamper 8 glitch filter */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF8_EN(1U); } /* Route TX to external tamper 8 */ base->LPATRC1R = SNVS_LPATRC1R_ET8RCTL(config.activeTamper); /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET8_EN_MASK; break; case (kSNVS_ExternalTamper9): /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF9(config.filter); /* Enable tamper 9 glitch filter */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF9_EN(1U); } /* Route TX to external tamper 9 */ base->LPATRC1R = SNVS_LPATRC2R_ET9RCTL(config.activeTamper); /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET9_EN_MASK; break; case (kSNVS_ExternalTamper10): /* Enable filter and set it's value if set */ if (config.filterenable != 0U) { /* Set filter value */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF10(config.filter); /* Enable tamper 10 glitch filter */ SNVS->LPTGF2CR |= SNVS_LPTGF2CR_ETGF10_EN(1U); } /* Route TX to external tamper 10 */ base->LPATRC1R = SNVS_LPATRC2R_ET10RCTL(config.activeTamper); /* enable tamper pin */ base->LPTDC2R |= SNVS_LPTDC2R_ET10_EN_MASK; break; #endif default: status = kStatus_InvalidArgument; /* All the cases have been listed above, the default clause should not be reached. */ break; } return status; } /*! * brief Sets voltage tamper detect * * param base SNVS peripheral base address * param enable True if enable false if disable */ status_t SNVS_LP_SetVoltageTamper(SNVS_Type *base, bool enable) { base->LPTDCR |= SNVS_LPTDCR_VT_EN(enable); return kStatus_Success; } /*! * brief Sets temperature tamper detect * * param base SNVS peripheral base address * param enable True if enable false if disable */ status_t SNVS_LP_SetTemperatureTamper(SNVS_Type *base, bool enable) { SNVS->LPTDCR |= SNVS_LPTDCR_TT_EN(enable); return kStatus_Success; } /*! * brief Sets clock tamper detect * * param base SNVS peripheral base address * param enable True if enable false if disable */ status_t SNVS_LP_SetClockTamper(SNVS_Type *base, bool enable) { SNVS->LPTDCR |= SNVS_LPTDCR_CT_EN(enable); return kStatus_Success; } /*! * brief Check voltage tamper * * param base SNVS peripheral base address */ snvs_lp_external_tamper_status_t SNVS_LP_CheckVoltageTamper(SNVS_Type *base) { return ((SNVS->LPSR & SNVS_LPSR_VTD_MASK) != 0U) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; } /*! * brief Check temperature tamper * * param base SNVS peripheral base address */ snvs_lp_external_tamper_status_t SNVS_LP_CheckTemperatureTamper(SNVS_Type *base) { return ((SNVS->LPSR & SNVS_LPSR_TTD_MASK) != 0U) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; } /*! * brief Check clock tamper * * param base SNVS peripheral base address */ snvs_lp_external_tamper_status_t SNVS_LP_CheckClockTamper(SNVS_Type *base) { return ((SNVS->LPSR & SNVS_LPSR_CTD_MASK) != 0U) ? kSNVS_TamperDetected : kSNVS_TamperNotDetected; } #endif /* defined(FSL_FEATURE_SNVS_HAS_ACTIVE_TAMPERS) && (FSL_FEATURE_SNVS_HAS_ACTIVE_TAMPERS > 0) */ /*! * brief Get the current Monotonic Counter. * * param base SNVS peripheral base address * return Current Monotonic Counter value. */ uint64_t SNVS_LP_GetMonotonicCounter(SNVS_Type *base) { uint32_t mc_lsb, mc_msb; mc_msb = base->LPSMCMR; mc_lsb = base->LPSMCLR; return ((uint64_t)mc_msb << 32UL) | (uint64_t)mc_lsb; } /*! * brief Write Zeroizable Master Key (ZMK) to the SNVS registers. * * param base SNVS peripheral base address * param ZMKey The ZMK write to the SNVS register. */ void SNVS_LP_WriteZeroizableMasterKey(SNVS_Type *base, uint32_t ZMKey[SNVS_ZMK_REG_COUNT]) { uint8_t i = 0; for (i = 0; i < SNVS_ZMK_REG_COUNT; i++) { base->LPZMKR[i] = ZMKey[i]; } } #if defined(FSL_FEATURE_SNVS_HAS_STATE_TRANSITION) && (FSL_FEATURE_SNVS_HAS_STATE_TRANSITION > 0) /*! * brief Transition SNVS SSM state to Trusted/Non-secure from Check state * * param base SNVS peripheral base address * * return kStatus_Success: Success in transitioning SSM State * kStatus_Fail: SSM State transition failed */ status_t SNVS_LP_SSM_State_Transition(SNVS_Type *base) { uint32_t curr_ssm_state = ((base->HPSR & SNVS_HPSR_SSM_STATE_MASK) >> SNVS_HPSR_SSM_STATE_SHIFT); uint32_t sec_config = ((OCOTP_CTRL->HW_OCOTP_OTFAD_CFG3 & OCOTP_CTRL_HW_OCOTP_SEC_CONFIG1_MASK) >> OCOTP_CTRL_HW_OCOTP_SEC_CONFIG1_SHIFT); /* Check if SSM State is Check state */ if (curr_ssm_state == SNVS_SSM_STATE_CHECK) { if (sec_config == SEC_CONFIG_OPEN) { /* Transition to Non-secure state */ base->HPCOMR |= SNVS_HPCOMR_SW_SV(1); } else { /* Transition to Trusted state */ base->HPCOMR |= SNVS_HPCOMR_SSM_ST(1); } } uint32_t new_ssm_state = ((base->HPSR & SNVS_HPSR_SSM_STATE_MASK) >> SNVS_HPSR_SSM_STATE_SHIFT); if (new_ssm_state != SNVS_SSM_STATE_CHECK) { return kStatus_Success; } else { return kStatus_Fail; } } #endif /* FSL_FEATURE_SNVS_HAS_STATE_TRANSITION */