037c9ea0a4
Summary The naming standard at https://cwiki.apache.org/confluence/display/NUTTX/Naming+FAQ requires that all MCU-private files begin with the name of the architecture, not up_. This PR addresses only these name changes for the up_*.h files. There are only three, but almost 1680 files that include them: up_arch.h up_internal.h up_vfork.h The only change to the files is from including up_arch.h to arm_arch.h (for example). The entire job required to be compatible with that Naming Convention will also require changing the naming of the up_() functions that are used only within arch/arm and board/arm. Impact There should be not impact of this change (other that one step toward more consistent naming). Testing stm32f4discovery:netnsh
1963 lines
52 KiB
C
1963 lines
52 KiB
C
/****************************************************************************
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* arch/arm/src/stm32f7/stm32_rtc.c
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*
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* Copyright (C) 2011, 2015-2019 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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* David Sidrane <david.sidrane@nscdg.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdbool.h>
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#include <sched.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/irq.h>
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#include <nuttx/time.h>
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#include "arm_arch.h"
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#include "stm32_rcc.h"
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#include "stm32_pwr.h"
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#include "stm32_exti.h"
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#include "stm32_rtc.h"
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#include <arch/board/board.h>
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#ifdef CONFIG_STM32F7_RTC
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* This RTC implementation supports
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* - date/time RTC hardware
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* - extended functions Alarm A and B
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* */
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#ifndef CONFIG_RTC_DATETIME
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# error "CONFIG_RTC_DATETIME must be set to use this driver"
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#endif
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#ifdef CONFIG_RTC_HIRES
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# error "CONFIG_RTC_HIRES must NOT be set with this driver"
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#endif
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#ifndef CONFIG_STM32F7_PWR
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# error "CONFIG_STM32F7_PWR must selected to use this driver"
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#endif
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/* Constants ****************************************************************/
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#if defined(CONFIG_STM32F7_RTC_HSECLOCK)
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# define RCC_BDCR_RTCSEL RCC_BDCR_RTCSEL_HSE
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#elif defined(CONFIG_STM32F7_RTC_LSICLOCK)
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# define RCC_BDCR_RTCSEL RCC_BDCR_RTCSEL_LSI
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#elif defined(CONFIG_STM32F7_RTC_LSECLOCK)
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# define RCC_BDCR_RTCSEL RCC_BDCR_RTCSEL_LSE
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#else
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# warning "RCC_BDCR_RTCSEL_NOCLK has been selected - RTC will not count"
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#endif
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#define SYNCHRO_TIMEOUT (0x00020000)
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#define INITMODE_TIMEOUT (0x00010000)
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/* Time conversions */
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#define MINUTES_IN_HOUR 60
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#define HOURS_IN_DAY 24
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#define hours_add(parm_hrs) \
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time->tm_hour += parm_hrs;\
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if ((HOURS_IN_DAY-1) < (time->tm_hour))\
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{\
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time->tm_hour = (parm_hrs - HOURS_IN_DAY);\
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}
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#define RTC_ALRMR_DIS_MASK (RTC_ALRMR_MSK4 | RTC_ALRMR_MSK3 | \
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RTC_ALRMR_MSK2 | RTC_ALRMR_MSK1)
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#define RTC_ALRMR_DIS_DATE_MASK (RTC_ALRMR_MSK4)
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#define RTC_ALRMR_ENABLE (0)
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/****************************************************************************
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* Private Types
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****************************************************************************/
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#ifdef CONFIG_RTC_ALARM
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typedef unsigned int rtc_alarmreg_t;
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struct alm_cbinfo_s
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{
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volatile alm_callback_t ac_cb; /* Client callback function */
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volatile FAR void *ac_arg; /* Argument to pass with the callback function */
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};
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#ifdef CONFIG_RTC_ALARM
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/* Callback to use when an EXTI is activated */
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static struct alm_cbinfo_s g_alarmcb[RTC_ALARM_LAST];
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#endif
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#ifdef CONFIG_RTC_PERIODIC
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static wakeupcb_t g_wakeupcb;
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static bool g_wakeup_enabled; /* True: Wakeup interrupts are enabled */
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/* g_rtc_enabled is set true after the RTC has successfully initialized */
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volatile bool g_rtc_enabled = false;
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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#ifdef CONFIG_RTC_ALARM
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static int rtchw_check_alrawf(void);
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static int rtchw_set_alrmar(rtc_alarmreg_t alarmreg);
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#if CONFIG_RTC_NALARMS > 1
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static int rtchw_check_alrbwf(void);
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static int rtchw_set_alrmbr(rtc_alarmreg_t alarmreg);
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#endif
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: rtc_dumpregs
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****************************************************************************/
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#ifdef CONFIG_DEBUG_RTC_INFO
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static void rtc_dumpregs(FAR const char *msg)
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{
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int rtc_state;
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rtcinfo("%s:\n", msg);
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rtcinfo(" TR: %08x\n", getreg32(STM32_RTC_TR));
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rtcinfo(" DR: %08x\n", getreg32(STM32_RTC_DR));
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rtcinfo(" CR: %08x\n", getreg32(STM32_RTC_CR));
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rtcinfo(" ISR: %08x\n", getreg32(STM32_RTC_ISR));
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rtcinfo(" PRER: %08x\n", getreg32(STM32_RTC_PRER));
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rtcinfo(" WUTR: %08x\n", getreg32(STM32_RTC_WUTR));
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rtcinfo(" ALRMAR: %08x\n", getreg32(STM32_RTC_ALRMAR));
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rtcinfo(" ALRMBR: %08x\n", getreg32(STM32_RTC_ALRMBR));
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rtcinfo(" SHIFTR: %08x\n", getreg32(STM32_RTC_SHIFTR));
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rtcinfo(" TSTR: %08x\n", getreg32(STM32_RTC_TSTR));
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rtcinfo(" TSDR: %08x\n", getreg32(STM32_RTC_TSDR));
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rtcinfo(" TSSSR: %08x\n", getreg32(STM32_RTC_TSSSR));
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rtcinfo(" CALR: %08x\n", getreg32(STM32_RTC_CALR));
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rtcinfo(" TAMPCR: %08x\n", getreg32(STM32_RTC_TAMPCR));
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rtcinfo("ALRMASSR: %08x\n", getreg32(STM32_RTC_ALRMASSR));
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rtcinfo("ALRMBSSR: %08x\n", getreg32(STM32_RTC_ALRMBSSR));
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rtcinfo("MAGICREG: %08x\n", getreg32(RTC_MAGIC_REG));
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rtc_state =
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((getreg32(STM32_EXTI_RTSR) & EXTI_RTC_ALARM) ? 0x1000 : 0) |
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((getreg32(STM32_EXTI_FTSR) & EXTI_RTC_ALARM) ? 0x0100 : 0) |
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((getreg32(STM32_EXTI_IMR) & EXTI_RTC_ALARM) ? 0x0010 : 0) |
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((getreg32(STM32_EXTI_EMR) & EXTI_RTC_ALARM) ? 0x0001 : 0);
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rtcinfo("EXTI (RTSR FTSR ISR EVT): %01x\n", rtc_state);
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}
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#else
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# define rtc_dumpregs(msg)
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#endif
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/****************************************************************************
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* Name: rtc_dumptime
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****************************************************************************/
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#ifdef CONFIG_DEBUG_RTC_INFO
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static void rtc_dumptime(FAR const struct tm *tp, FAR const uint32_t *usecs,
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FAR const char *msg)
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{
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rtcinfo("%s:\n", msg);
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rtcinfo(" tm_sec: %08x\n", tp->tm_sec);
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rtcinfo(" tm_min: %08x\n", tp->tm_min);
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rtcinfo(" tm_hour: %08x\n", tp->tm_hour);
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rtcinfo(" tm_mday: %08x\n", tp->tm_mday);
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rtcinfo(" tm_mon: %08x\n", tp->tm_mon);
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rtcinfo(" tm_year: %08x\n", tp->tm_year);
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if (usecs != NULL)
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{
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rtcinfo(" usecs: %08x\n", (unsigned int)*usecs);
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}
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}
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#else
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# define rtc_dumptime(tp, usecs, msg)
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#endif
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/****************************************************************************
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* Name: rtc_wprunlock
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*
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* Description:
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* Disable RTC write protection
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static void rtc_wprunlock(void)
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{
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/* Enable write access to the backup domain (RTC registers, RTC backup data
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* registers and backup SRAM).
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*/
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stm32_pwr_enablebkp(true);
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/* The following steps are required to unlock the write protection on all
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* the RTC registers (except for RTC_ISR[13:8], RTC_TAFCR, and RTC_BKPxR).
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*
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* 1. Write 0xca into the RTC_WPR register.
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* 2. Write 0x53 into the RTC_WPR register.
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*
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* Writing a wrong key re-activates the write protection.
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*/
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putreg32(0xca, STM32_RTC_WPR);
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putreg32(0x53, STM32_RTC_WPR);
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}
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/****************************************************************************
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* Name: rtc_wprlock
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*
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* Description:
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* Enable RTC write protection
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static inline void rtc_wprlock(void)
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{
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/* Writing any wrong key re-activates the write protection. */
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putreg32(0xff, STM32_RTC_WPR);
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/* Disable write access to the backup domain (RTC registers, RTC backup
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* data registers and backup SRAM).
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*/
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stm32_pwr_enablebkp(false);
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}
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/****************************************************************************
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* Name: rtc_synchwait
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*
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* Description:
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* Waits until the RTC Time and Date registers (RTC_TR and RTC_DR) are
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* synchronized with RTC APB clock.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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****************************************************************************/
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static int rtc_synchwait(void)
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{
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volatile uint32_t timeout;
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uint32_t regval;
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int ret;
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/* Disable the write protection for RTC registers */
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rtc_wprunlock();
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/* Clear Registers synchronization flag (RSF) */
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regval = getreg32(STM32_RTC_ISR);
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regval &= ~RTC_ISR_RSF;
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putreg32(regval, STM32_RTC_ISR);
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/* Now wait the registers to become synchronised */
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ret = -ETIMEDOUT;
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for (timeout = 0; timeout < SYNCHRO_TIMEOUT; timeout++)
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{
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regval = getreg32(STM32_RTC_ISR);
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if ((regval & RTC_ISR_RSF) != 0)
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{
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/* Synchronized */
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ret = OK;
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break;
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}
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}
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/* Re-enable the write protection for RTC registers */
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rtc_wprlock();
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return ret;
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}
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/****************************************************************************
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* Name: rtc_enterinit
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*
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* Description:
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* Enter RTC initialization mode.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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****************************************************************************/
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static int rtc_enterinit(void)
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{
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volatile uint32_t timeout;
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uint32_t regval;
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int ret;
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/* Check if the Initialization mode is already set */
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regval = getreg32(STM32_RTC_ISR);
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ret = OK;
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if ((regval & RTC_ISR_INITF) == 0)
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{
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/* Set the Initialization mode */
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putreg32(RTC_ISR_INIT, STM32_RTC_ISR);
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/* Wait until the RTC is in the INIT state (or a timeout occurs) */
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ret = -ETIMEDOUT;
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for (timeout = 0; timeout < INITMODE_TIMEOUT; timeout++)
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{
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regval = getreg32(STM32_RTC_ISR);
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if ((regval & RTC_ISR_INITF) != 0)
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{
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ret = OK;
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break;
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}
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}
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}
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return ret;
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}
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/****************************************************************************
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* Name: rtc_exitinit
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*
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* Description:
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* Exit RTC initialization mode.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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****************************************************************************/
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static void rtc_exitinit(void)
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{
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uint32_t regval;
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regval = getreg32(STM32_RTC_ISR);
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regval &= ~(RTC_ISR_INIT);
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putreg32(regval, STM32_RTC_ISR);
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}
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/****************************************************************************
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* Name: rtc_bin2bcd
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*
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* Description:
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* Converts a 2 digit binary to BCD format
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*
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* Input Parameters:
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* value - The byte to be converted.
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*
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* Returned Value:
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* The value in BCD representation
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*
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****************************************************************************/
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static uint32_t rtc_bin2bcd(int value)
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{
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uint32_t msbcd = 0;
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while (value >= 10)
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{
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msbcd++;
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value -= 10;
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}
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return (msbcd << 4) | value;
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}
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/****************************************************************************
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* Name: rtc_bin2bcd
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*
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* Description:
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* Convert from 2 digit BCD to binary.
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*
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* Input Parameters:
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* value - The BCD value to be converted.
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*
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* Returned Value:
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* The value in binary representation
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*
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****************************************************************************/
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static int rtc_bcd2bin(uint32_t value)
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{
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uint32_t tens = (value >> 4) * 10;
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return (int)(tens + (value & 0x0f));
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}
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/****************************************************************************
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* Name: rtc_setup
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*
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* Description:
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* Performs first time configuration of the RTC. A special value written
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* into back-up register 0 will prevent this function from being called on
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* sub-sequent resets or power up.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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****************************************************************************/
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static int rtc_setup(void)
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{
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uint32_t regval;
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int ret;
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/* Disable the write protection for RTC registers */
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rtc_wprunlock();
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/* Set Initialization mode */
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ret = rtc_enterinit();
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if (ret == OK)
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{
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/* Set the 24 hour format by clearing the FMT bit in the RTC
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* control register
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*/
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regval = getreg32(STM32_RTC_CR);
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regval &= ~RTC_CR_FMT;
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putreg32(regval, STM32_RTC_CR);
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/* Configure RTC pre-scaler with the required values */
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#ifdef CONFIG_STM32F7_RTC_HSECLOCK
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/* For a 1 MHz clock this yields 0.9999360041 Hz on the second
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* timer - which is pretty close.
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*/
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putreg32(((uint32_t)7182 << RTC_PRER_PREDIV_S_SHIFT) |
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((uint32_t)0x7f << RTC_PRER_PREDIV_A_SHIFT),
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STM32_RTC_PRER);
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#else
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/* Correct values for 32.768 KHz LSE clock and inaccurate LSI clock */
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putreg32(((uint32_t)0xff << RTC_PRER_PREDIV_S_SHIFT) |
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((uint32_t)0x7f << RTC_PRER_PREDIV_A_SHIFT),
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STM32_RTC_PRER);
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#endif
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/* Exit RTC initialization mode */
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rtc_exitinit();
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}
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/* Re-enable the write protection for RTC registers */
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rtc_wprlock();
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return ret;
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}
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/****************************************************************************
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* Name: rtc_resume
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*
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* Description:
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* Called when the RTC was already initialized on a previous power cycle.
|
|
* This just brings the RTC back into full operation.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void rtc_resume(void)
|
|
{
|
|
#ifdef CONFIG_RTC_ALARM
|
|
uint32_t regval;
|
|
|
|
/* Clear the RTC alarm flags */
|
|
|
|
regval = getreg32(STM32_RTC_ISR);
|
|
regval &= ~(RTC_ISR_ALRAF | RTC_ISR_ALRBF);
|
|
putreg32(regval, STM32_RTC_ISR);
|
|
|
|
/* Clear the RTC Alarm Pending bit */
|
|
|
|
putreg32(EXTI_RTC_ALARM, STM32_EXTI_PR);
|
|
#endif
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_alarm_handler
|
|
*
|
|
* Description:
|
|
* RTC ALARM interrupt service routine through the EXTI line
|
|
*
|
|
* Input Parameters:
|
|
* irq - The IRQ number that generated the interrupt
|
|
* context - Architecture specific register save information.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; A negated errno value on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_ALARM
|
|
static int stm32_rtc_alarm_handler(int irq, void *context, void *arg)
|
|
{
|
|
FAR struct alm_cbinfo_s *cbinfo;
|
|
alm_callback_t cb;
|
|
FAR void *cbarg;
|
|
uint32_t isr;
|
|
uint32_t cr;
|
|
int ret = OK;
|
|
|
|
/* Enable write access to the backup domain (RTC registers, RTC
|
|
* backup data registers and backup SRAM).
|
|
*/
|
|
|
|
stm32_pwr_enablebkp(true);
|
|
|
|
isr = getreg32(STM32_RTC_ISR);
|
|
|
|
/* Check for EXTI from Alarm A or B and handle according */
|
|
|
|
if ((isr & RTC_ISR_ALRAF) != 0)
|
|
{
|
|
cr = getreg32(STM32_RTC_CR);
|
|
if ((cr & RTC_CR_ALRAIE) != 0)
|
|
{
|
|
cbinfo = &g_alarmcb[RTC_ALARMA];
|
|
if (cbinfo->ac_cb != NULL)
|
|
{
|
|
/* Alarm A callback */
|
|
|
|
cb = cbinfo->ac_cb;
|
|
cbarg = (FAR void *)cbinfo->ac_arg;
|
|
|
|
cbinfo->ac_cb = NULL;
|
|
cbinfo->ac_arg = NULL;
|
|
|
|
cb(cbarg, RTC_ALARMA);
|
|
}
|
|
|
|
isr = getreg32(STM32_RTC_ISR);
|
|
isr &= ~RTC_ISR_ALRAF;
|
|
putreg32(isr, STM32_RTC_ISR);
|
|
}
|
|
}
|
|
|
|
#if CONFIG_RTC_NALARMS > 1
|
|
if ((isr & RTC_ISR_ALRBF) != 0)
|
|
{
|
|
cr = getreg32(STM32_RTC_CR);
|
|
if ((cr & RTC_CR_ALRBIE) != 0)
|
|
{
|
|
cbinfo = &g_alarmcb[RTC_ALARMB];
|
|
if (cbinfo->ac_cb != NULL)
|
|
{
|
|
/* Alarm B callback */
|
|
|
|
cb = cbinfo->ac_cb;
|
|
cbarg = (FAR void *)cbinfo->ac_arg;
|
|
|
|
cbinfo->ac_cb = NULL;
|
|
cbinfo->ac_arg = NULL;
|
|
|
|
cb(cbarg, RTC_ALARMB);
|
|
}
|
|
|
|
isr = getreg32(STM32_RTC_ISR);
|
|
isr &= ~RTC_ISR_ALRBF;
|
|
putreg32(isr, STM32_RTC_ISR);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Disable write access to the backup domain (RTC registers, RTC backup
|
|
* data registers and backup SRAM).
|
|
*/
|
|
|
|
stm32_pwr_enablebkp(false);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: rtchw_check_alrXwf X= a or B
|
|
*
|
|
* Description:
|
|
* Check registers
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_ALARM
|
|
static int rtchw_check_alrawf(void)
|
|
{
|
|
volatile uint32_t timeout;
|
|
uint32_t regval;
|
|
int ret = -ETIMEDOUT;
|
|
|
|
/* Check RTC_ISR ALRAWF for access to alarm register,
|
|
* Can take 2 RTCCLK cycles or timeout
|
|
* CubeMX use GetTick.
|
|
*/
|
|
|
|
for (timeout = 0; timeout < INITMODE_TIMEOUT; timeout++)
|
|
{
|
|
regval = getreg32(STM32_RTC_ISR);
|
|
if ((regval & RTC_ISR_ALRAWF) != 0)
|
|
{
|
|
ret = OK;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_RTC_ALARM) && CONFIG_RTC_NALARMS > 1
|
|
static int rtchw_check_alrbwf(void)
|
|
{
|
|
volatile uint32_t timeout;
|
|
uint32_t regval;
|
|
int ret = -ETIMEDOUT;
|
|
|
|
/* Check RTC_ISR ALRBWF for access to alarm register,
|
|
* can take 2 RTCCLK cycles or timeout
|
|
* CubeMX use GetTick.
|
|
*/
|
|
|
|
for (timeout = 0; timeout < INITMODE_TIMEOUT; timeout++)
|
|
{
|
|
regval = getreg32(STM32_RTC_ISR);
|
|
if ((regval & RTC_ISR_ALRBWF) != 0)
|
|
{
|
|
ret = OK;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtchw_set_alrmXr X is a or b
|
|
*
|
|
* Description:
|
|
* Set the alarm (A or B) hardware registers, using the required hardware
|
|
* access protocol
|
|
*
|
|
* Input Parameters:
|
|
* alarmreg - the register
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_ALARM
|
|
static int rtchw_set_alrmar(rtc_alarmreg_t alarmreg)
|
|
{
|
|
int isr;
|
|
int ret = -EBUSY;
|
|
|
|
/* Disable the write protection for RTC registers */
|
|
|
|
rtc_wprunlock();
|
|
|
|
/* Disable RTC alarm A & Interrupt A */
|
|
|
|
modifyreg32(STM32_RTC_CR, (RTC_CR_ALRAE | RTC_CR_ALRAIE), 0);
|
|
|
|
/* Ensure Alarm A flag reset; this is edge triggered */
|
|
|
|
isr = getreg32(STM32_RTC_ISR) & ~RTC_ISR_ALRAF;
|
|
putreg32(isr, STM32_RTC_ISR);
|
|
|
|
/* Wait for Alarm A to be writable */
|
|
|
|
ret = rtchw_check_alrawf();
|
|
if (ret != OK)
|
|
{
|
|
goto errout_with_wprunlock;
|
|
}
|
|
|
|
/* Set the RTC Alarm A register */
|
|
|
|
putreg32(alarmreg, STM32_RTC_ALRMAR);
|
|
putreg32(0, STM32_RTC_ALRMASSR);
|
|
rtcinfo(" ALRMAR: %08x\n", getreg32(STM32_RTC_ALRMAR));
|
|
|
|
/* Enable RTC alarm A */
|
|
|
|
modifyreg32(STM32_RTC_CR, 0, (RTC_CR_ALRAE | RTC_CR_ALRAIE));
|
|
|
|
errout_with_wprunlock:
|
|
rtc_wprlock();
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_RTC_ALARM) && CONFIG_RTC_NALARMS > 1
|
|
static int rtchw_set_alrmbr(rtc_alarmreg_t alarmreg)
|
|
{
|
|
int isr;
|
|
int ret = -EBUSY;
|
|
|
|
/* Disable the write protection for RTC registers */
|
|
|
|
rtc_wprunlock();
|
|
|
|
/* Disable RTC alarm B & Interrupt B */
|
|
|
|
modifyreg32(STM32_RTC_CR, (RTC_CR_ALRBE | RTC_CR_ALRBIE), 0);
|
|
|
|
/* Ensure Alarm B flag reset; this is edge triggered */
|
|
|
|
isr = getreg32(STM32_RTC_ISR) & ~RTC_ISR_ALRBF;
|
|
putreg32(isr, STM32_RTC_ISR);
|
|
|
|
/* Wait for Alarm B to be writable */
|
|
|
|
ret = rtchw_check_alrbwf();
|
|
if (ret != OK)
|
|
{
|
|
goto rtchw_set_alrmbr_exit;
|
|
}
|
|
|
|
/* Set the RTC Alarm B register */
|
|
|
|
putreg32(alarmreg, STM32_RTC_ALRMBR);
|
|
putreg32(0, STM32_RTC_ALRMBSSR);
|
|
rtcinfo(" ALRMBR: %08x\n", getreg32(STM32_RTC_ALRMBR));
|
|
|
|
/* Enable RTC alarm B */
|
|
|
|
modifyreg32(STM32_RTC_CR, 0, (RTC_CR_ALRBE | RTC_CR_ALRBIE));
|
|
|
|
rtchw_set_alrmbr_exit:
|
|
rtc_wprlock();
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_getalarmdatetime
|
|
*
|
|
* Description:
|
|
* Get the current date and time for a RTC alarm.
|
|
*
|
|
* Input Parameters:
|
|
* reg - RTC alarm register
|
|
* tp - The location to return the high resolution time value.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_ALARM
|
|
static int stm32_rtc_getalarmdatetime(rtc_alarmreg_t reg, FAR struct tm *tp)
|
|
{
|
|
uint32_t data;
|
|
uint32_t tmp;
|
|
|
|
DEBUGASSERT(tp != NULL);
|
|
|
|
/* Sample the data time register. */
|
|
|
|
data = getreg32(reg);
|
|
|
|
/* Convert the RTC time to fields in struct tm format. All of the STM32
|
|
* ranges of values correspond between struct tm and the time register.
|
|
*/
|
|
|
|
tmp = (data & (RTC_ALRMR_SU_MASK | RTC_ALRMR_ST_MASK)) >> RTC_ALRMR_SU_SHIFT;
|
|
tp->tm_sec = rtc_bcd2bin(tmp);
|
|
|
|
tmp = (data & (RTC_ALRMR_MNU_MASK | RTC_ALRMR_MNT_MASK)) >> RTC_ALRMR_MNU_SHIFT;
|
|
tp->tm_min = rtc_bcd2bin(tmp);
|
|
|
|
tmp = (data & (RTC_ALRMR_HU_MASK | RTC_ALRMR_HT_MASK)) >> RTC_ALRMR_HU_SHIFT;
|
|
tp->tm_hour = rtc_bcd2bin(tmp);
|
|
|
|
tmp = (data & (RTC_ALRMR_DU_MASK | RTC_ALRMR_DT_MASK)) >> RTC_ALRMR_DU_SHIFT;
|
|
tp->tm_mday = rtc_bcd2bin(tmp);
|
|
|
|
return OK;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: up_rtc_initialize
|
|
*
|
|
* Description:
|
|
* Initialize the hardware RTC per the selected configuration. This
|
|
* function is called once during the OS initialization sequence
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
int up_rtc_initialize(void)
|
|
{
|
|
uint32_t regval;
|
|
uint32_t tr_bkp;
|
|
uint32_t dr_bkp;
|
|
int ret;
|
|
int maxretry = 10;
|
|
int nretry = 0;
|
|
|
|
/* Clocking for the PWR block must be provided. However, this is done
|
|
* unconditionally in stm32f7xxx_rcc.c on power up. This done
|
|
* unconditionally because the PWR block is also needed to set the
|
|
* internal voltage regulator for maximum performance.
|
|
*/
|
|
|
|
/* Select the clock source */
|
|
|
|
/* Save the token before losing it when resetting */
|
|
|
|
regval = getreg32(RTC_MAGIC_REG);
|
|
|
|
/* Enable write access to the backup domain (RTC registers, RTC
|
|
* backup data registers and backup SRAM).
|
|
*/
|
|
|
|
stm32_pwr_enablebkp(true);
|
|
|
|
if (regval != RTC_MAGIC && regval != RTC_MAGIC_TIME_SET)
|
|
{
|
|
/* Issue the Backup domain Reset Per Section 5.3.20 DocID028270 Rev 2
|
|
* The LSEON, LSEBYP, RTCSEL and RTCEN bits in the RCC backup domain
|
|
* control register (RCC_BDCR) are in the Backup domain. As a result,
|
|
* after Reset, these bits are write-protected and the DBP bit in the
|
|
* PWR power control register (PWR_CR1) has to be set before these can
|
|
* be modified. Refer to Section 5.1.1: System reset on page 148 for
|
|
* further information. These bits are only reset after a Backup
|
|
* domain Reset (see Section 5.1.3: Backup domain reset).
|
|
*
|
|
* This has to be done here so that PWR is already enabled
|
|
*/
|
|
|
|
modifyreg32(STM32_RCC_BDCR, 0, RCC_BDCR_BDRST);
|
|
modifyreg32(STM32_RCC_BDCR, RCC_BDCR_BDRST, 0);
|
|
|
|
#if RCC_BDCR_RTCSEL == RCC_BDCR_RTCSEL_LSE
|
|
/* Because of the Backup domain Reset - we must re enable the LSE */
|
|
|
|
stm32_rcc_enablelse();
|
|
#endif
|
|
|
|
/* Some boards do not have the external 32khz oscillator installed, for
|
|
* those boards we must fallback to the crummy internal RC clock or the
|
|
* external high rate clock
|
|
*/
|
|
|
|
#ifdef CONFIG_STM32F7_RTC_HSECLOCK
|
|
/* Use the HSE clock as the input to the RTC block */
|
|
|
|
rtc_dumpregs("On reset HSE");
|
|
|
|
#elif defined(CONFIG_STM32F7_RTC_LSICLOCK)
|
|
/* Use the LSI clock as the input to the RTC block */
|
|
|
|
rtc_dumpregs("On reset LSI");
|
|
|
|
#elif defined(CONFIG_STM32F7_RTC_LSECLOCK)
|
|
/* Use the LSE clock as the input to the RTC block */
|
|
|
|
rtc_dumpregs("On reset LSE");
|
|
|
|
#endif
|
|
modifyreg32(STM32_RCC_BDCR, RCC_BDCR_RTCSEL_MASK, RCC_BDCR_RTCSEL);
|
|
|
|
/* Enable the RTC Clock by setting the RTCEN bit in the RCC register */
|
|
|
|
modifyreg32(STM32_RCC_BDCR, 0, RCC_BDCR_RTCEN);
|
|
}
|
|
else
|
|
{
|
|
uint32_t clksrc = getreg32(STM32_RCC_BDCR);
|
|
|
|
rtc_dumpregs("On reset warm");
|
|
|
|
/* The RTC is already in use: check if the clock source has changed */
|
|
|
|
if ((clksrc & RCC_BDCR_RTCSEL_MASK) != RCC_BDCR_RTCSEL)
|
|
{
|
|
tr_bkp = getreg32(STM32_RTC_TR);
|
|
dr_bkp = getreg32(STM32_RTC_DR);
|
|
modifyreg32(STM32_RCC_BDCR, 0, RCC_BDCR_BDRST);
|
|
modifyreg32(STM32_RCC_BDCR, RCC_BDCR_BDRST, 0);
|
|
|
|
# if RCC_BDCR_RTCSEL == RCC_BDCR_RTCSEL_LSE
|
|
/* Because of the Backup domain Reset - we must re enable the LSE
|
|
* if it is used
|
|
*/
|
|
|
|
stm32_rcc_enablelse();
|
|
#endif
|
|
/* Change to the new clock as the input to the RTC block */
|
|
|
|
modifyreg32(STM32_RCC_BDCR, RCC_BDCR_RTCSEL_MASK, RCC_BDCR_RTCSEL);
|
|
|
|
putreg32(tr_bkp, STM32_RTC_TR);
|
|
putreg32(dr_bkp, STM32_RTC_DR);
|
|
|
|
/* Keep the fact that the RTC is initialized */
|
|
|
|
putreg32(RTC_MAGIC, RTC_MAGIC_REG);
|
|
|
|
/* Enable the RTC Clock by setting the RTCEN bit in the RCC
|
|
* register.
|
|
*/
|
|
|
|
modifyreg32(STM32_RCC_BDCR, 0, RCC_BDCR_RTCEN);
|
|
}
|
|
}
|
|
|
|
/* Loop, attempting to initialize/resume the RTC. This loop is necessary
|
|
* because it seems that occasionally it takes longer to initialize the
|
|
* RTC (the actual failure is in rtc_synchwait()).
|
|
*/
|
|
|
|
do
|
|
{
|
|
/* Wait for the RTC Time and Date registers to be synchronized with
|
|
* RTC APB clock.
|
|
*/
|
|
|
|
ret = rtc_synchwait();
|
|
|
|
/* Check that rtc_syncwait() returned successfully */
|
|
|
|
switch (ret)
|
|
{
|
|
case OK:
|
|
{
|
|
rtcinfo("rtc_syncwait() okay\n");
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
rtcerr("ERROR: rtc_syncwait() failed (%d)\n", ret);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
while (ret != OK && ++nretry < maxretry);
|
|
|
|
/* Check if the one-time initialization of the RTC has already been
|
|
* performed. We can determine this by checking if the magic number
|
|
* has been written to the back-up date register DR0.
|
|
*/
|
|
|
|
if (regval != RTC_MAGIC && regval != RTC_MAGIC_TIME_SET)
|
|
{
|
|
rtcinfo("Do setup\n");
|
|
|
|
/* Perform the one-time setup of the LSE clocking to the RTC */
|
|
|
|
ret = rtc_setup();
|
|
|
|
/* Remember that the RTC is initialized */
|
|
|
|
putreg32(RTC_MAGIC, RTC_MAGIC_REG);
|
|
}
|
|
else
|
|
{
|
|
rtcinfo("Do resume\n");
|
|
|
|
/* RTC already set-up, just resume normal operation */
|
|
|
|
rtc_resume();
|
|
rtc_dumpregs("Did resume");
|
|
}
|
|
|
|
/* Disable write access to the backup domain (RTC registers, RTC backup
|
|
* data registers and backup SRAM).
|
|
*/
|
|
|
|
stm32_pwr_enablebkp(false);
|
|
|
|
if (ret != OK && nretry > 0)
|
|
{
|
|
rtcinfo("setup/resume ran %d times and failed with %d\n",
|
|
nretry, ret);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
g_rtc_enabled = true;
|
|
rtc_dumpregs("After Initialization");
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_getdatetime_with_subseconds
|
|
*
|
|
* Description:
|
|
* Get the current date and time from the date/time RTC. This interface
|
|
* is only supported by the date/time RTC hardware implementation.
|
|
* It is used to replace the system timer. It is only used by the RTOS
|
|
* during initialization to set up the system time when CONFIG_RTC and
|
|
* CONFIG_RTC_DATETIME are selected (and CONFIG_RTC_HIRES is not).
|
|
*
|
|
* NOTE: Some date/time RTC hardware is capability of sub-second accuracy.
|
|
* That sub-second accuracy is returned through 'nsec'.
|
|
*
|
|
* Input Parameters:
|
|
* tp - The location to return the high resolution time value.
|
|
* nsec - The location to return the subsecond time value.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_STM32F7_HAVE_RTC_SUBSECONDS
|
|
int stm32_rtc_getdatetime_with_subseconds(FAR struct tm *tp, FAR long *nsec)
|
|
#else
|
|
int up_rtc_getdatetime(FAR struct tm *tp)
|
|
#endif
|
|
{
|
|
uint32_t dr;
|
|
uint32_t tr;
|
|
uint32_t tmp;
|
|
#ifdef CONFIG_STM32F7_HAVE_RTC_SUBSECONDS
|
|
uint32_t ssr;
|
|
uint32_t prediv_s;
|
|
uint32_t usecs;
|
|
#endif
|
|
|
|
/* Sample the data time registers. There is a race condition here... If
|
|
* we sample the time just before midnight on December 31, the date could
|
|
* be wrong because the day rolled over while were sampling. Thus loop for
|
|
* checking overflow here is needed. There is a race condition with
|
|
* subseconds too. If we sample TR register just before second rolling
|
|
* and subseconds are read at wrong second, we get wrong time.
|
|
*/
|
|
|
|
do
|
|
{
|
|
dr = getreg32(STM32_RTC_DR);
|
|
tr = getreg32(STM32_RTC_TR);
|
|
#ifdef CONFIG_STM32F7_HAVE_RTC_SUBSECONDS
|
|
ssr = getreg32(STM32_RTC_SSR);
|
|
tmp = getreg32(STM32_RTC_TR);
|
|
if (tmp != tr)
|
|
{
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
tmp = getreg32(STM32_RTC_DR);
|
|
if (tmp == dr)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
while (1);
|
|
|
|
rtc_dumpregs("Reading Time");
|
|
|
|
/* Convert the RTC time to fields in struct tm format. All of the STM32
|
|
* ranges of values correspond between struct tm and the time register.
|
|
*/
|
|
|
|
tmp = (tr & (RTC_TR_SU_MASK | RTC_TR_ST_MASK)) >> RTC_TR_SU_SHIFT;
|
|
tp->tm_sec = rtc_bcd2bin(tmp);
|
|
|
|
tmp = (tr & (RTC_TR_MNU_MASK | RTC_TR_MNT_MASK)) >> RTC_TR_MNU_SHIFT;
|
|
tp->tm_min = rtc_bcd2bin(tmp);
|
|
|
|
tmp = (tr & (RTC_TR_HU_MASK | RTC_TR_HT_MASK)) >> RTC_TR_HU_SHIFT;
|
|
tp->tm_hour = rtc_bcd2bin(tmp);
|
|
|
|
/* Now convert the RTC date to fields in struct tm format:
|
|
* Days: 1-31 match in both cases.
|
|
* Month: STM32 is 1-12, struct tm is 0-11.
|
|
* Years: STM32 is 00-99, struct tm is years since 1900.
|
|
* WeekDay: STM32 is 1 = Mon - 7 = Sun
|
|
*
|
|
* Issue: I am not sure what the STM32 years mean. Are these the
|
|
* years 2000-2099? I'll assume so.
|
|
*/
|
|
|
|
tmp = (dr & (RTC_DR_DU_MASK | RTC_DR_DT_MASK)) >> RTC_DR_DU_SHIFT;
|
|
tp->tm_mday = rtc_bcd2bin(tmp);
|
|
|
|
tmp = (dr & (RTC_DR_MU_MASK | RTC_DR_MT)) >> RTC_DR_MU_SHIFT;
|
|
tp->tm_mon = rtc_bcd2bin(tmp) - 1;
|
|
|
|
tmp = (dr & (RTC_DR_YU_MASK | RTC_DR_YT_MASK)) >> RTC_DR_YU_SHIFT;
|
|
tp->tm_year = rtc_bcd2bin(tmp) + 100;
|
|
|
|
tmp = (dr & RTC_DR_WDU_MASK) >> RTC_DR_WDU_SHIFT;
|
|
tp->tm_wday = tmp % 7;
|
|
tp->tm_yday = tp->tm_mday +
|
|
clock_daysbeforemonth(tp->tm_mon, clock_isleapyear(tp->tm_year + 1900));
|
|
tp->tm_isdst = 0;
|
|
|
|
#ifdef CONFIG_STM32F7_HAVE_RTC_SUBSECONDS
|
|
/* Return RTC sub-seconds if a non-NULL value
|
|
* of nsec has been provided to receive the sub-second value.
|
|
*/
|
|
|
|
prediv_s = getreg32(STM32_RTC_PRER) & RTC_PRER_PREDIV_S_MASK;
|
|
prediv_s >>= RTC_PRER_PREDIV_S_SHIFT;
|
|
|
|
ssr &= RTC_SSR_MASK;
|
|
|
|
/* Maximum prediv_s is 0x7fff, thus we can multiply by 100000 and
|
|
* still fit 32-bit unsigned integer.
|
|
*/
|
|
|
|
usecs = (((prediv_s - ssr) * 100000) / (prediv_s + 1)) * 10;
|
|
if (nsec != NULL)
|
|
{
|
|
*nsec = usecs * 1000;
|
|
}
|
|
|
|
rtc_dumptime((FAR const struct tm *)tp, &usecs, "Returning");
|
|
#else /* CONFIG_STM32F7_HAVE_RTC_SUBSECONDS */
|
|
rtc_dumptime((FAR const struct tm *)tp, NULL, "Returning");
|
|
#endif
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: up_rtc_getdatetime
|
|
*
|
|
* Description:
|
|
* Get the current date and time from the date/time RTC. This interface
|
|
* is only supported by the date/time RTC hardware implementation.
|
|
* It is used to replace the system timer. It is only used by the RTOS
|
|
* during initialization to set up the system time when CONFIG_RTC and
|
|
* CONFIG_RTC_DATETIME are selected (and CONFIG_RTC_HIRES is not).
|
|
*
|
|
* NOTE: Some date/time RTC hardware is capability of sub-second accuracy.
|
|
* That sub-second accuracy is lost in this interface. However, since the
|
|
* system time is reinitialized on each power-up/reset, there will be no
|
|
* timing inaccuracy in the long run.
|
|
*
|
|
* Input Parameters:
|
|
* tp - The location to return the high resolution time value.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_STM32F7_HAVE_RTC_SUBSECONDS
|
|
int up_rtc_getdatetime(FAR struct tm *tp)
|
|
{
|
|
return stm32_rtc_getdatetime_with_subseconds(tp, NULL);
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: up_rtc_getdatetime_with_subseconds
|
|
*
|
|
* Description:
|
|
* Get the current date and time from the date/time RTC. This interface
|
|
* is only supported by the date/time RTC hardware implementation.
|
|
* It is used to replace the system timer. It is only used by the RTOS
|
|
* during initialization to set up the system time when CONFIG_RTC and
|
|
* CONFIG_RTC_DATETIME are selected (and CONFIG_RTC_HIRES is not).
|
|
*
|
|
* NOTE: This interface exposes sub-second accuracy capability of RTC
|
|
* hardware. This interface allow maintaining timing accuracy when
|
|
* system time needs constant resynchronization with RTC, for example with
|
|
* board level power-save mode utilizing deep-sleep modes such as STOP on
|
|
* STM32 MCUs.
|
|
*
|
|
* Input Parameters:
|
|
* tp - The location to return the high resolution time value.
|
|
* nsec - The location to return the subsecond time value.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_ARCH_HAVE_RTC_SUBSECONDS
|
|
# ifndef CONFIG_STM32F7_HAVE_RTC_SUBSECONDS
|
|
# error "Invalid config, enable CONFIG_STM32F7_HAVE_RTC_SUBSECONDS."
|
|
# endif
|
|
int up_rtc_getdatetime_with_subseconds(FAR struct tm *tp, FAR long *nsec)
|
|
{
|
|
return stm32_rtc_getdatetime_with_subseconds(tp, nsec);
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_setdatetime
|
|
*
|
|
* Description:
|
|
* Set the RTC to the provided time. RTC implementations which provide
|
|
* up_rtc_getdatetime() (CONFIG_RTC_DATETIME is selected) should provide
|
|
* this function.
|
|
*
|
|
* Input Parameters:
|
|
* tp - the time to use
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
int stm32_rtc_setdatetime(FAR const struct tm *tp)
|
|
{
|
|
uint32_t tr;
|
|
uint32_t dr;
|
|
int ret;
|
|
|
|
rtc_dumptime(tp, NULL, "Setting time");
|
|
|
|
/* Then write the broken out values to the RTC */
|
|
|
|
/* Convert the struct tm format to RTC time register fields.
|
|
* All of the ranges of values correspond between struct tm and the
|
|
* time register.
|
|
*/
|
|
|
|
tr = (rtc_bin2bcd(tp->tm_sec) << RTC_TR_SU_SHIFT) |
|
|
(rtc_bin2bcd(tp->tm_min) << RTC_TR_MNU_SHIFT) |
|
|
(rtc_bin2bcd(tp->tm_hour) << RTC_TR_HU_SHIFT);
|
|
tr &= ~RTC_TR_RESERVED_BITS;
|
|
|
|
/* Now convert the fields in struct tm format to the RTC date register
|
|
* fields:
|
|
*
|
|
* Days: 1-31 match in both cases.
|
|
* Month: STM32 is 1-12, struct tm is 0-11.
|
|
* Years: STM32 is 00-99, struct tm is years since 1900.
|
|
* WeekDay: STM32 is 1 = Mon - 7 = Sun
|
|
*
|
|
* Issue: I am not sure what the STM32 years mean. Are these the
|
|
* years 2000-2099? I'll assume so.
|
|
*/
|
|
|
|
dr = (rtc_bin2bcd(tp->tm_mday) << RTC_DR_DU_SHIFT) |
|
|
((rtc_bin2bcd(tp->tm_mon + 1)) << RTC_DR_MU_SHIFT) |
|
|
((tp->tm_wday == 0 ? 7 : (tp->tm_wday & 7)) << RTC_DR_WDU_SHIFT) |
|
|
((rtc_bin2bcd(tp->tm_year - 100)) << RTC_DR_YU_SHIFT);
|
|
|
|
dr &= ~RTC_DR_RESERVED_BITS;
|
|
|
|
/* Disable the write protection for RTC registers */
|
|
|
|
rtc_wprunlock();
|
|
|
|
/* Set Initialization mode */
|
|
|
|
ret = rtc_enterinit();
|
|
if (ret == OK)
|
|
{
|
|
/* Set the RTC TR and DR registers */
|
|
|
|
putreg32(tr, STM32_RTC_TR);
|
|
putreg32(dr, STM32_RTC_DR);
|
|
|
|
/* Exit Initialization mode and wait for the RTC Time and Date
|
|
* registers to be synchronized with RTC APB clock.
|
|
*/
|
|
|
|
rtc_exitinit();
|
|
ret = rtc_synchwait();
|
|
}
|
|
|
|
/* Remember that the RTC is initialized and had its time set. */
|
|
|
|
if (getreg32(RTC_MAGIC_REG) != RTC_MAGIC_TIME_SET)
|
|
{
|
|
stm32_pwr_enablebkp(true);
|
|
putreg32(RTC_MAGIC_TIME_SET, RTC_MAGIC_REG);
|
|
stm32_pwr_enablebkp(false);
|
|
}
|
|
|
|
/* Re-enable the write protection for RTC registers */
|
|
|
|
rtc_wprlock();
|
|
rtc_dumpregs("New time setting");
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_havesettime
|
|
*
|
|
* Description:
|
|
* Check if RTC time has been set.
|
|
*
|
|
* Returned Value:
|
|
* Returns true if RTC date-time have been previously set.
|
|
*
|
|
****************************************************************************/
|
|
|
|
bool stm32_rtc_havesettime(void)
|
|
{
|
|
return getreg32(RTC_MAGIC_REG) == RTC_MAGIC_TIME_SET;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: up_rtc_settime
|
|
*
|
|
* Description:
|
|
* Set the RTC to the provided time. All RTC implementations must be able
|
|
* to set their time based on a standard timespec.
|
|
*
|
|
* Input Parameters:
|
|
* tp - the time to use
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
int up_rtc_settime(FAR const struct timespec *tp)
|
|
{
|
|
FAR struct tm newtime;
|
|
|
|
/* Break out the time values (not that the time is set only to units of
|
|
* seconds)
|
|
*/
|
|
|
|
gmtime_r(&tp->tv_sec, &newtime);
|
|
return stm32_rtc_setdatetime(&newtime);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_setalarm
|
|
*
|
|
* Description:
|
|
* Set an alarm to an absolute time using associated hardware.
|
|
*
|
|
* Input Parameters:
|
|
* alminfo - Information about the alarm configuration.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_ALARM
|
|
int stm32_rtc_setalarm(FAR struct alm_setalarm_s *alminfo)
|
|
{
|
|
FAR struct alm_cbinfo_s *cbinfo;
|
|
rtc_alarmreg_t alarmreg;
|
|
int ret = -EINVAL;
|
|
static bool once = false;
|
|
|
|
DEBUGASSERT(alminfo != NULL);
|
|
DEBUGASSERT(RTC_ALARM_LAST > alminfo->as_id);
|
|
|
|
/* Configure RTC interrupt to catch alarm interrupts. All RTC interrupts
|
|
* are connected to the EXTI controller. To enable the RTC Alarm
|
|
* interrupt, the following sequence is required:
|
|
*
|
|
* 1. Configure and enable the EXTI Line 17 RTC ALARM in interrupt mode
|
|
* and select the rising edge sensitivity.
|
|
* For STM32F7:
|
|
* EXTI line 21 RTC Tamper & Timestamp
|
|
* EXTI line 22 RTC Wakeup
|
|
* 2. Configure and enable the RTC_Alarm IRQ channel in the NVIC.
|
|
* 3. Configure the RTC to generate RTC alarms (Alarm A or Alarm B).
|
|
*/
|
|
|
|
if (!once)
|
|
{
|
|
once = true;
|
|
stm32_exti_alarm(true, false, true, stm32_rtc_alarm_handler, NULL);
|
|
}
|
|
|
|
/* REVISIT: Should test that the time is in the future */
|
|
|
|
rtc_dumptime(&alminfo->as_time, NULL, "New alarm time");
|
|
|
|
/* Break out the values to the HW alarm register format. The values in
|
|
* all STM32 fields match the fields of struct tm in this case. Notice
|
|
* that the alarm is limited to one month.
|
|
*/
|
|
|
|
alarmreg = (rtc_bin2bcd(alminfo->as_time.tm_sec) << RTC_ALRMR_SU_SHIFT) |
|
|
(rtc_bin2bcd(alminfo->as_time.tm_min) << RTC_ALRMR_MNU_SHIFT) |
|
|
(rtc_bin2bcd(alminfo->as_time.tm_hour) << RTC_ALRMR_HU_SHIFT) |
|
|
(rtc_bin2bcd(alminfo->as_time.tm_mday) << RTC_ALRMR_DU_SHIFT);
|
|
|
|
/* Set the alarm in hardware and enable interrupts */
|
|
|
|
switch (alminfo->as_id)
|
|
{
|
|
case RTC_ALARMA:
|
|
{
|
|
cbinfo = &g_alarmcb[RTC_ALARMA];
|
|
cbinfo->ac_cb = alminfo->as_cb;
|
|
cbinfo->ac_arg = alminfo->as_arg;
|
|
|
|
ret = rtchw_set_alrmar(alarmreg | RTC_ALRMR_ENABLE);
|
|
if (ret < 0)
|
|
{
|
|
cbinfo->ac_cb = NULL;
|
|
cbinfo->ac_arg = NULL;
|
|
}
|
|
}
|
|
break;
|
|
|
|
#if CONFIG_RTC_NALARMS > 1
|
|
case RTC_ALARMB:
|
|
{
|
|
cbinfo = &g_alarmcb[RTC_ALARMB];
|
|
cbinfo->ac_cb = alminfo->as_cb;
|
|
cbinfo->ac_arg = alminfo->as_arg;
|
|
|
|
ret = rtchw_set_alrmbr(alarmreg | RTC_ALRMR_ENABLE);
|
|
if (ret < 0)
|
|
{
|
|
cbinfo->ac_cb = NULL;
|
|
cbinfo->ac_arg = NULL;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
rtcerr("ERROR: Invalid ALARM%d\n", alminfo->as_id);
|
|
break;
|
|
}
|
|
|
|
rtc_dumpregs("After alarm setting");
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_cancelalarm
|
|
*
|
|
* Description:
|
|
* Cancel an alarm.
|
|
*
|
|
* Input Parameters:
|
|
* alarmid - Identifies the alarm to be canceled
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_ALARM
|
|
int stm32_rtc_cancelalarm(enum alm_id_e alarmid)
|
|
{
|
|
int ret = -EINVAL;
|
|
|
|
DEBUGASSERT(RTC_ALARM_LAST > alarmid);
|
|
|
|
/* Cancel the alarm in hardware and disable interrupts */
|
|
|
|
switch (alarmid)
|
|
{
|
|
case RTC_ALARMA:
|
|
{
|
|
/* Cancel the global callback function */
|
|
|
|
g_alarmcb[alarmid].ac_cb = NULL;
|
|
g_alarmcb[alarmid].ac_arg = NULL;
|
|
|
|
/* Disable the write protection for RTC registers */
|
|
|
|
rtc_wprunlock();
|
|
|
|
/* Disable RTC alarm and interrupt */
|
|
|
|
modifyreg32(STM32_RTC_CR, (RTC_CR_ALRAE | RTC_CR_ALRAIE), 0);
|
|
|
|
ret = rtchw_check_alrawf();
|
|
if (ret < 0)
|
|
{
|
|
goto errout_with_wprunlock;
|
|
}
|
|
|
|
/* Unset the alarm */
|
|
|
|
putreg32(-1, STM32_RTC_ALRMAR);
|
|
modifyreg32(STM32_RTC_ISR, RTC_ISR_ALRAF, 0);
|
|
rtc_wprlock();
|
|
ret = OK;
|
|
}
|
|
break;
|
|
|
|
#if CONFIG_RTC_NALARMS > 1
|
|
case RTC_ALARMB:
|
|
{
|
|
/* Cancel the global callback function */
|
|
|
|
g_alarmcb[alarmid].ac_cb = NULL;
|
|
g_alarmcb[alarmid].ac_arg = NULL;
|
|
|
|
/* Disable the write protection for RTC registers */
|
|
|
|
rtc_wprunlock();
|
|
|
|
/* Disable RTC alarm and interrupt */
|
|
|
|
modifyreg32(STM32_RTC_CR, (RTC_CR_ALRBE | RTC_CR_ALRBIE), 0);
|
|
|
|
ret = rtchw_check_alrbwf();
|
|
if (ret < 0)
|
|
{
|
|
goto errout_with_wprunlock;
|
|
}
|
|
|
|
/* Unset the alarm */
|
|
|
|
putreg32(-1, STM32_RTC_ALRMBR);
|
|
modifyreg32(STM32_RTC_ISR, RTC_ISR_ALRBF, 0);
|
|
rtc_wprlock();
|
|
ret = OK;
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
rtcerr("ERROR: Invalid ALARM%d\n", alarmid);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
|
|
errout_with_wprunlock:
|
|
rtc_wprlock();
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_rdalarm
|
|
*
|
|
* Description:
|
|
* Query an alarm configured in hardware.
|
|
*
|
|
* Input Parameters:
|
|
* alminfo - Information about the alarm configuration.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_ALARM
|
|
int stm32_rtc_rdalarm(FAR struct alm_rdalarm_s *alminfo)
|
|
{
|
|
rtc_alarmreg_t alarmreg;
|
|
int ret = -EINVAL;
|
|
|
|
DEBUGASSERT(alminfo != NULL);
|
|
DEBUGASSERT(RTC_ALARM_LAST > alminfo->ar_id);
|
|
|
|
switch (alminfo->ar_id)
|
|
{
|
|
case RTC_ALARMA:
|
|
{
|
|
alarmreg = STM32_RTC_ALRMAR;
|
|
ret = stm32_rtc_getalarmdatetime(alarmreg,
|
|
(struct tm *)alminfo->ar_time);
|
|
}
|
|
break;
|
|
|
|
#if CONFIG_RTC_NALARMS > 1
|
|
case RTC_ALARMB:
|
|
{
|
|
alarmreg = STM32_RTC_ALRMBR;
|
|
ret = stm32_rtc_getalarmdatetime(alarmreg,
|
|
(struct tm *)alminfo->ar_time);
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
rtcerr("ERROR: Invalid ALARM%d\n", alminfo->ar_id);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_wakeup_handler
|
|
*
|
|
* Description:
|
|
* RTC WAKEUP interrupt service routine through the EXTI line
|
|
*
|
|
* Input Parameters:
|
|
* irq - The IRQ number that generated the interrupt
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; A negated errno value on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_PERIODIC
|
|
static int stm32_rtc_wakeup_handler(int irq, FAR void *context,
|
|
FAR void *arg)
|
|
{
|
|
uint32_t regval = 0;
|
|
|
|
stm32_pwr_enablebkp(true);
|
|
|
|
regval = getreg32(STM32_RTC_ISR);
|
|
regval &= ~RTC_ISR_WUTF;
|
|
putreg32(regval, STM32_RTC_ISR);
|
|
|
|
stm32_pwr_enablebkp(false);
|
|
|
|
if (g_wakeupcb != NULL)
|
|
{
|
|
g_wakeupcb();
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: rtc_enable_wakeup
|
|
*
|
|
* Description:
|
|
* Enable periodic wakeup interrupts
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_PERIODIC
|
|
static inline void rtc_enable_wakeup(void)
|
|
{
|
|
if (!g_wakeup_enabled)
|
|
{
|
|
stm32_exti_wakeup(true, false, true, stm32_rtc_wakeup_handler,
|
|
NULL);
|
|
g_wakeup_enabled = true;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: rtc_set_wcksel
|
|
*
|
|
* Description:
|
|
* Sets RTC wakeup clock selection value
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_PERIODIC
|
|
static inline void rtc_set_wcksel(unsigned int wucksel)
|
|
{
|
|
uint32_t regval = 0;
|
|
|
|
regval = getreg32(STM32_RTC_CR);
|
|
regval &= ~RTC_CR_WUCKSEL_MASK;
|
|
regval |= wucksel;
|
|
putreg32(regval, STM32_RTC_CR);
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_setperiodic
|
|
*
|
|
* Description:
|
|
* Set a periodic RTC wakeup
|
|
*
|
|
* Input Parameters:
|
|
* period - Time to sleep between wakeups
|
|
* callback - Function to call when the period expires.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_PERIODIC
|
|
int stm32_rtc_setperiodic(FAR const struct timespec *period,
|
|
wakeupcb_t callback)
|
|
{
|
|
unsigned int wutr_val;
|
|
int ret;
|
|
int timeout;
|
|
uint32_t regval;
|
|
uint32_t secs;
|
|
uint32_t millisecs;
|
|
|
|
#if defined(CONFIG_STM32F7_RTC_HSECLOCK)
|
|
# error "Periodic wakeup not available for HSE"
|
|
#elif defined(CONFIG_STM32F7_RTC_LSICLOCK)
|
|
# error "Periodic wakeup not available for LSI (and it is too inaccurate!)"
|
|
#elif defined(CONFIG_STM32F7_RTC_LSECLOCK)
|
|
const uint32_t rtc_div16_max_msecs = 16 * 1000 * 0xffffu / STM32_LSE_FREQUENCY;
|
|
#else
|
|
# error "No clock for RTC!"
|
|
#endif
|
|
|
|
/* Lets use RTC wake-up with 0.001 sec to ~18 hour range.
|
|
*
|
|
* TODO: scale to higher periods, with necessary losing some precision.
|
|
* We currently go for subseconds accuracy instead of maximum period.
|
|
*/
|
|
|
|
if (period->tv_sec > 0xffffu ||
|
|
(period->tv_sec == 0xffffu && period->tv_nsec > 0))
|
|
{
|
|
/* More than max. */
|
|
|
|
secs = 0xffffu;
|
|
millisecs = secs * 1000;
|
|
}
|
|
else
|
|
{
|
|
secs = period->tv_sec;
|
|
millisecs = secs * 1000 + period->tv_nsec / NSEC_PER_MSEC;
|
|
}
|
|
|
|
if (millisecs == 0)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Make sure the alarm interrupt is enabled at the NVIC */
|
|
|
|
rtc_enable_wakeup();
|
|
|
|
rtc_wprunlock();
|
|
|
|
/* Clear WUTE in RTC_CR to disable the wakeup timer */
|
|
|
|
regval = getreg32(STM32_RTC_CR);
|
|
regval &= ~RTC_CR_WUTE;
|
|
putreg32(regval, STM32_RTC_CR);
|
|
|
|
/* Poll WUTWF until it is set in RTC_ISR (takes around 2 RTCCLK clock
|
|
* cycles)
|
|
*/
|
|
|
|
ret = -ETIMEDOUT;
|
|
for (timeout = 0; timeout < SYNCHRO_TIMEOUT; timeout++)
|
|
{
|
|
regval = getreg32(STM32_RTC_ISR);
|
|
if ((regval & RTC_ISR_WUTWF) != 0)
|
|
{
|
|
/* Synchronized */
|
|
|
|
ret = OK;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Set callback function pointer. */
|
|
|
|
g_wakeupcb = callback;
|
|
|
|
if (millisecs <= rtc_div16_max_msecs)
|
|
{
|
|
unsigned int ticks;
|
|
|
|
/* Select wake-up with 32768/16 hz counter. */
|
|
|
|
rtc_set_wcksel(RTC_CR_WUCKSEL_RTCDIV16);
|
|
|
|
/* Get number of ticks. */
|
|
|
|
ticks = millisecs * STM32_LSE_FREQUENCY / (16 * 1000);
|
|
|
|
/* Wake-up is after WUT+1 ticks. */
|
|
|
|
wutr_val = ticks - 1;
|
|
}
|
|
else
|
|
{
|
|
/* Select wake-up with 1hz counter. */
|
|
|
|
rtc_set_wcksel(RTC_CR_WUCKSEL_CKSPRE);
|
|
|
|
/* Wake-up is after WUT+1 ticks. */
|
|
|
|
wutr_val = secs - 1;
|
|
}
|
|
|
|
/* Program the wakeup auto-reload value WUT[15:0], and the wakeup clock
|
|
* selection.
|
|
*/
|
|
|
|
putreg32(wutr_val, STM32_RTC_WUTR);
|
|
|
|
regval = getreg32(STM32_RTC_CR);
|
|
regval |= RTC_CR_WUTIE | RTC_CR_WUTE;
|
|
putreg32(regval, STM32_RTC_CR);
|
|
|
|
/* Just in case resets the WUTF flag in RTC_ISR */
|
|
|
|
regval = getreg32(STM32_RTC_ISR);
|
|
regval &= ~RTC_ISR_WUTF;
|
|
putreg32(regval, STM32_RTC_ISR);
|
|
|
|
rtc_wprlock();
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_rtc_cancelperiodic
|
|
*
|
|
* Description:
|
|
* Cancel a periodic wakeup
|
|
*
|
|
* Input Parameters:
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) on success; a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_RTC_PERIODIC
|
|
int stm32_rtc_cancelperiodic(void)
|
|
{
|
|
int ret = OK;
|
|
int timeout = 0;
|
|
uint32_t regval = 0;
|
|
|
|
rtc_wprunlock();
|
|
|
|
/* Clear WUTE and WUTIE in RTC_CR to disable the wakeup timer */
|
|
|
|
regval = getreg32(STM32_RTC_CR);
|
|
regval &= ~(RTC_CR_WUTE | RTC_CR_WUTIE);
|
|
putreg32(regval, STM32_RTC_CR);
|
|
|
|
/* Poll WUTWF until it is set in RTC_ISR (takes around 2 RTCCLK clock
|
|
* cycles)
|
|
*/
|
|
|
|
ret = -ETIMEDOUT;
|
|
for (timeout = 0; timeout < SYNCHRO_TIMEOUT; timeout++)
|
|
{
|
|
regval = getreg32(STM32_RTC_ISR);
|
|
if ((regval & RTC_ISR_WUTWF) != 0)
|
|
{
|
|
/* Synchronized */
|
|
|
|
ret = OK;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Clears RTC_WUTR register */
|
|
|
|
regval = getreg32(STM32_RTC_WUTR);
|
|
regval &= ~RTC_WUTR_MASK;
|
|
putreg32(regval, STM32_RTC_WUTR);
|
|
|
|
rtc_wprlock();
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_STM32F7_RTC */
|