Mercurial > public > ostc4
view Common/Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_ll_crc.h @ 232:f0069f002c55 div-fixes-4-1
Bugfix: make date/time setting work over reboots
Setting the time/date over the UART interface or by the menu, seems
to work, but a reboot of the RTE brings back strange, seemingly
random, time.
The reason for this is rather simple. In the settings, a time
is stored, based on some flawed logic, and that time was restored
on reboot. There is no reason to store any time, when the moment of
restoring it is unrelated in time. So, the fix is simple: do not
set time (in the RTC) based on some time from the past. The whole idea
of a RTC is that it does preserve the time for you, as long its
powered. Any attempt to do things better using stored time data is
futile (and nonsense).
And while working on his, also kick out some useless code from the RTE.
There is no reason to initialize the time on the RTC to some random
time/date in the past. A zero data/time is as good and any random
date.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author | Jan Mulder <jlmulder@xs4all.nl> |
---|---|
date | Wed, 03 Apr 2019 21:11:56 +0200 |
parents | c78bcbd5deda |
children |
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/** ****************************************************************************** * @file stm32f4xx_ll_crc.h * @author MCD Application Team * @brief Header file of CRC LL module. ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ /* Define to prevent recursive inclusion -------------------------------------*/ #ifndef __STM32F4xx_LL_CRC_H #define __STM32F4xx_LL_CRC_H #ifdef __cplusplus extern "C" { #endif /* Includes ------------------------------------------------------------------*/ #include "stm32f4xx.h" /** @addtogroup STM32F4xx_LL_Driver * @{ */ #if defined(CRC) /** @defgroup CRC_LL CRC * @{ */ /* Private types -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private constants ---------------------------------------------------------*/ /* Private macros ------------------------------------------------------------*/ /* Exported types ------------------------------------------------------------*/ /* Exported constants --------------------------------------------------------*/ /* Exported macro ------------------------------------------------------------*/ /** @defgroup CRC_LL_Exported_Macros CRC Exported Macros * @{ */ /** @defgroup CRC_LL_EM_WRITE_READ Common Write and read registers Macros * @{ */ /** * @brief Write a value in CRC register * @param __INSTANCE__ CRC Instance * @param __REG__ Register to be written * @param __VALUE__ Value to be written in the register * @retval None */ #define LL_CRC_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, (__VALUE__)) /** * @brief Read a value in CRC register * @param __INSTANCE__ CRC Instance * @param __REG__ Register to be read * @retval Register value */ #define LL_CRC_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__) /** * @} */ /** * @} */ /* Exported functions --------------------------------------------------------*/ /** @defgroup CRC_LL_Exported_Functions CRC Exported Functions * @{ */ /** @defgroup CRC_LL_EF_Configuration CRC Configuration functions * @{ */ /** * @brief Reset the CRC calculation unit. * @rmtoll CR RESET LL_CRC_ResetCRCCalculationUnit * @param CRCx CRC Instance * @retval None */ __STATIC_INLINE void LL_CRC_ResetCRCCalculationUnit(CRC_TypeDef *CRCx) { WRITE_REG(CRCx->CR, CRC_CR_RESET); } /** * @} */ /** @defgroup CRC_LL_EF_Data_Management Data_Management * @{ */ /** * @brief Write given 32-bit data to the CRC calculator * @rmtoll DR DR LL_CRC_FeedData32 * @param CRCx CRC Instance * @param InData value to be provided to CRC calculator between between Min_Data=0 and Max_Data=0xFFFFFFFF * @retval None */ __STATIC_INLINE void LL_CRC_FeedData32(CRC_TypeDef *CRCx, uint32_t InData) { WRITE_REG(CRCx->DR, InData); } /** * @brief Return current CRC calculation result. 32 bits value is returned. * @rmtoll DR DR LL_CRC_ReadData32 * @param CRCx CRC Instance * @retval Current CRC calculation result as stored in CRC_DR register (32 bits). */ __STATIC_INLINE uint32_t LL_CRC_ReadData32(CRC_TypeDef *CRCx) { return (uint32_t)(READ_REG(CRCx->DR)); } /** * @brief Return data stored in the Independent Data(IDR) register. * @note This register can be used as a temporary storage location for one byte. * @rmtoll IDR IDR LL_CRC_Read_IDR * @param CRCx CRC Instance * @retval Value stored in CRC_IDR register (General-purpose 8-bit data register). */ __STATIC_INLINE uint32_t LL_CRC_Read_IDR(CRC_TypeDef *CRCx) { return (uint32_t)(READ_REG(CRCx->IDR)); } /** * @brief Store data in the Independent Data(IDR) register. * @note This register can be used as a temporary storage location for one byte. * @rmtoll IDR IDR LL_CRC_Write_IDR * @param CRCx CRC Instance * @param InData value to be stored in CRC_IDR register (8-bit) between between Min_Data=0 and Max_Data=0xFF * @retval None */ __STATIC_INLINE void LL_CRC_Write_IDR(CRC_TypeDef *CRCx, uint32_t InData) { *((uint8_t __IO *)(&CRCx->IDR)) = (uint8_t) InData; } /** * @} */ #if defined(USE_FULL_LL_DRIVER) /** @defgroup CRC_LL_EF_Init Initialization and de-initialization functions * @{ */ ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx); /** * @} */ #endif /* USE_FULL_LL_DRIVER */ /** * @} */ /** * @} */ #endif /* defined(CRC) */ /** * @} */ #ifdef __cplusplus } #endif #endif /* __STM32F4xx_LL_CRC_H */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/