1bbf5c9449
stm32h7 RTC and friends support
* stm32h7:Removed f7 in file path
* stm32f7:Fix overwritten IRQ enabled
System boot order calls clock_initialize then up_initalize.
clock_initialize was setting up the alarm IRQ
up_initalize is initializing the NVIC.
This most likely worked in the past due to a bug in the
NVIC init code that failed to clear the Interrupt enables.
That was fixed in 510b0f7e arch/arm/src: Correct all ARMv7-M
architectures. Interrupts were not be disabled correctly
on power up.
* stm32h7:Ported over F7 RTC
* nucleo-h743zi:Add RTC
Approved-by: Gregory Nutt <gnutt@nuttx.org>
196 lines
6.9 KiB
C
196 lines
6.9 KiB
C
/****************************************************************************
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* arch/arm/src/stm32h7/stm32_rtc.h
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*
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* Copyright (C) 2011 Uros Platise. All rights reserved.
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* Copyright (C) 2011-2013, 2015-2019 Gregory Nutt. All rights reserved.
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* Authors: Uros Platise <uros.platise@isotel.eu> (Original for the F1)
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* Gregory Nutt <gnutt@nuttx.org> (On-going support and development)
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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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#ifndef __ARCH_ARM_SRC_STM32H7_STM32_RTC_H
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#define __ARCH_ARM_SRC_STM32H7_STM32_RTC_H
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#include <nuttx/config.h>
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#include "chip.h"
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/* The STMH7 family use a more traditional Realtime Clock/Calendar (RTCC) with
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* broken-out data/time in BCD format. The backup registers are integrated into
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* the RTCC in these families.
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*/
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#include "hardware/stm32_rtcc.h"
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#include "stm32_alarm.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define STM32_RTC_PRESCALER_SECOND 32767 /* Default prescaler to get a second base */
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#define STM32_RTC_PRESCALER_MIN 1 /* Maximum speed of 16384 Hz */
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#if !defined(CONFIG_STM32H7_RTC_MAGIC)
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# define CONFIG_STM32H7_RTC_MAGIC (0xfacefeed)
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#endif
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#if !defined(CONFIG_STM32H7_RTC_MAGIC_TIME_SET)
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# define CONFIG_STM32H7_RTC_MAGIC_TIME_SET (0xf00dface)
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#endif
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#if !defined(CONFIG_STM32H7_RTC_MAGIC_REG)
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# define CONFIG_STM32H7_RTC_MAGIC_REG (0)
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#endif
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#define RTC_MAGIC CONFIG_STM32H7_RTC_MAGIC
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#define RTC_MAGIC_TIME_SET CONFIG_STM32H7_RTC_MAGIC_TIME_SET
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#define RTC_MAGIC_REG STM32_RTC_BKR(CONFIG_STM32H7_RTC_MAGIC_REG)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifndef __ASSEMBLY__
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_rtc_getdatetime_with_subseconds
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*
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* Description:
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* Get the current date and time from the date/time RTC. This interface
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* is only supported by the date/time RTC hardware implementation.
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* It is used to replace the system timer. It is only used by the RTOS
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* during initialization to set up the system time when CONFIG_RTC and
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* CONFIG_RTC_DATETIME are selected (and CONFIG_RTC_HIRES is not).
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*
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* NOTE: The sub-second accuracy is returned through 'nsec'.
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*
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* Input Parameters:
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* tp - The location to return the high resolution time value.
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* nsec - The location to return the subsecond time value.
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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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#ifdef CONFIG_STM32H7_HAVE_RTC_SUBSECONDS
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int stm32_rtc_getdatetime_with_subseconds(FAR struct tm *tp, FAR long *nsec);
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#endif
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/****************************************************************************
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* Name: stm32_rtc_setdatetime
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*
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* Description:
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* Set the RTC to the provided time. RTC implementations which provide
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* up_rtc_getdatetime() (CONFIG_RTC_DATETIME is selected) should provide
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* this function.
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*
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* Input Parameters:
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* tp - the time to use
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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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#ifdef CONFIG_RTC_DATETIME
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struct tm;
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int stm32_rtc_setdatetime(FAR const struct tm *tp);
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#endif
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/****************************************************************************
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* Name: stm32_rtc_havesettime
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*
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* Description:
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* Check if RTC time has been set.
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*
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* Returned Value:
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* Returns true if RTC date-time have been previously set.
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*
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****************************************************************************/
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bool stm32_rtc_havesettime(void);
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/****************************************************************************
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* Name: stm32_rtc_lowerhalf
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*
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* Description:
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* Instantiate the RTC lower half driver for the STM32. General usage:
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*
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* #include <nuttx/timers/rtc.h>
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* #include "stm32_rtc.h>
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*
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* struct rtc_lowerhalf_s *lower;
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* lower = stm32_rtc_lowerhalf();
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* rtc_initialize(0, lower);
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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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* On success, a non-NULL RTC lower interface is returned. NULL is
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* returned on any failure.
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*
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****************************************************************************/
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#ifdef CONFIG_RTC_DRIVER
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struct rtc_lowerhalf_s;
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FAR struct rtc_lowerhalf_s *stm32_rtc_lowerhalf(void);
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_STM32H7_STM32_RTC_H */
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