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view Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_i2c.c @ 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_i2c.c * @author MCD Application Team * @brief I2C LL module driver. ****************************************************************************** * @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. * ****************************************************************************** */ #if defined(USE_FULL_LL_DRIVER) /* Includes ------------------------------------------------------------------*/ #include "stm32f4xx_ll_i2c.h" #include "stm32f4xx_ll_bus.h" #include "stm32f4xx_ll_rcc.h" #ifdef USE_FULL_ASSERT #include "stm32_assert.h" #else #define assert_param(expr) ((void)0U) #endif /** @addtogroup STM32F4xx_LL_Driver * @{ */ #if defined (I2C1) || defined (I2C2) || defined (I2C3) /** @defgroup I2C_LL I2C * @{ */ /* Private types -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private constants ---------------------------------------------------------*/ /* Private macros ------------------------------------------------------------*/ /** @addtogroup I2C_LL_Private_Macros * @{ */ #define IS_LL_I2C_PERIPHERAL_MODE(__VALUE__) (((__VALUE__) == LL_I2C_MODE_I2C) || \ ((__VALUE__) == LL_I2C_MODE_SMBUS_HOST) || \ ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE) || \ ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE_ARP)) #define IS_LL_I2C_CLOCK_SPEED(__VALUE__) (((__VALUE__) > 0U) && ((__VALUE__) <= LL_I2C_MAX_SPEED_FAST)) #define IS_LL_I2C_DUTY_CYCLE(__VALUE__) (((__VALUE__) == LL_I2C_DUTYCYCLE_2) || \ ((__VALUE__) == LL_I2C_DUTYCYCLE_16_9)) #if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF) #define IS_LL_I2C_ANALOG_FILTER(__VALUE__) (((__VALUE__) == LL_I2C_ANALOGFILTER_ENABLE) || \ ((__VALUE__) == LL_I2C_ANALOGFILTER_DISABLE)) #define IS_LL_I2C_DIGITAL_FILTER(__VALUE__) ((__VALUE__) <= 0x0000000FU) #endif #define IS_LL_I2C_OWN_ADDRESS1(__VALUE__) ((__VALUE__) <= 0x000003FFU) #define IS_LL_I2C_TYPE_ACKNOWLEDGE(__VALUE__) (((__VALUE__) == LL_I2C_ACK) || \ ((__VALUE__) == LL_I2C_NACK)) #define IS_LL_I2C_OWN_ADDRSIZE(__VALUE__) (((__VALUE__) == LL_I2C_OWNADDRESS1_7BIT) || \ ((__VALUE__) == LL_I2C_OWNADDRESS1_10BIT)) /** * @} */ /* Private function prototypes -----------------------------------------------*/ /* Exported functions --------------------------------------------------------*/ /** @addtogroup I2C_LL_Exported_Functions * @{ */ /** @addtogroup I2C_LL_EF_Init * @{ */ /** * @brief De-initialize the I2C registers to their default reset values. * @param I2Cx I2C Instance. * @retval An ErrorStatus enumeration value: * - SUCCESS: I2C registers are de-initialized * - ERROR: I2C registers are not de-initialized */ uint32_t LL_I2C_DeInit(I2C_TypeDef *I2Cx) { ErrorStatus status = SUCCESS; /* Check the I2C Instance I2Cx */ assert_param(IS_I2C_ALL_INSTANCE(I2Cx)); if (I2Cx == I2C1) { /* Force reset of I2C clock */ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1); /* Release reset of I2C clock */ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1); } else if (I2Cx == I2C2) { /* Force reset of I2C clock */ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C2); /* Release reset of I2C clock */ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C2); } #if defined(I2C3) else if (I2Cx == I2C3) { /* Force reset of I2C clock */ LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C3); /* Release reset of I2C clock */ LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C3); } #endif else { status = ERROR; } return status; } /** * @brief Initialize the I2C registers according to the specified parameters in I2C_InitStruct. * @param I2Cx I2C Instance. * @param I2C_InitStruct pointer to a @ref LL_I2C_InitTypeDef structure. * @retval An ErrorStatus enumeration value: * - SUCCESS: I2C registers are initialized * - ERROR: Not applicable */ uint32_t LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct) { LL_RCC_ClocksTypeDef rcc_clocks; /* Check the I2C Instance I2Cx */ assert_param(IS_I2C_ALL_INSTANCE(I2Cx)); /* Check the I2C parameters from I2C_InitStruct */ assert_param(IS_LL_I2C_PERIPHERAL_MODE(I2C_InitStruct->PeripheralMode)); assert_param(IS_LL_I2C_CLOCK_SPEED(I2C_InitStruct->ClockSpeed)); assert_param(IS_LL_I2C_DUTY_CYCLE(I2C_InitStruct->DutyCycle)); #if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF) assert_param(IS_LL_I2C_ANALOG_FILTER(I2C_InitStruct->AnalogFilter)); assert_param(IS_LL_I2C_DIGITAL_FILTER(I2C_InitStruct->DigitalFilter)); #endif assert_param(IS_LL_I2C_OWN_ADDRESS1(I2C_InitStruct->OwnAddress1)); assert_param(IS_LL_I2C_TYPE_ACKNOWLEDGE(I2C_InitStruct->TypeAcknowledge)); assert_param(IS_LL_I2C_OWN_ADDRSIZE(I2C_InitStruct->OwnAddrSize)); /* Disable the selected I2Cx Peripheral */ LL_I2C_Disable(I2Cx); /* Retrieve Clock frequencies */ LL_RCC_GetSystemClocksFreq(&rcc_clocks); #if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF) /*---------------------------- I2Cx FLTR Configuration ----------------------- * Configure the analog and digital noise filters with parameters : * - AnalogFilter: I2C_FLTR_ANFOFF bit * - DigitalFilter: I2C_FLTR_DNF[3:0] bits */ LL_I2C_ConfigFilters(I2Cx, I2C_InitStruct->AnalogFilter, I2C_InitStruct->DigitalFilter); #endif /*---------------------------- I2Cx SCL Clock Speed Configuration ------------ * Configure the SCL speed : * - ClockSpeed: I2C_CR2_FREQ[5:0], I2C_TRISE_TRISE[5:0], I2C_CCR_FS, * and I2C_CCR_CCR[11:0] bits * - DutyCycle: I2C_CCR_DUTY[7:0] bits */ LL_I2C_ConfigSpeed(I2Cx, rcc_clocks.PCLK1_Frequency, I2C_InitStruct->ClockSpeed, I2C_InitStruct->DutyCycle); /*---------------------------- I2Cx OAR1 Configuration ----------------------- * Disable, Configure and Enable I2Cx device own address 1 with parameters : * - OwnAddress1: I2C_OAR1_ADD[9:8], I2C_OAR1_ADD[7:1] and I2C_OAR1_ADD0 bits * - OwnAddrSize: I2C_OAR1_ADDMODE bit */ LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize); /*---------------------------- I2Cx MODE Configuration ----------------------- * Configure I2Cx peripheral mode with parameter : * - PeripheralMode: I2C_CR1_SMBUS, I2C_CR1_SMBTYPE and I2C_CR1_ENARP bits */ LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode); /* Enable the selected I2Cx Peripheral */ LL_I2C_Enable(I2Cx); /*---------------------------- I2Cx CR2 Configuration ------------------------ * Configure the ACKnowledge or Non ACKnowledge condition * after the address receive match code or next received byte with parameter : * - TypeAcknowledge: I2C_CR2_NACK bit */ LL_I2C_AcknowledgeNextData(I2Cx, I2C_InitStruct->TypeAcknowledge); return SUCCESS; } /** * @brief Set each @ref LL_I2C_InitTypeDef field to default value. * @param I2C_InitStruct Pointer to a @ref LL_I2C_InitTypeDef structure. * @retval None */ void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct) { /* Set I2C_InitStruct fields to default values */ I2C_InitStruct->PeripheralMode = LL_I2C_MODE_I2C; I2C_InitStruct->ClockSpeed = 5000U; I2C_InitStruct->DutyCycle = LL_I2C_DUTYCYCLE_2; #if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF) I2C_InitStruct->AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE; I2C_InitStruct->DigitalFilter = 0U; #endif I2C_InitStruct->OwnAddress1 = 0U; I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK; I2C_InitStruct->OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT; } /** * @} */ /** * @} */ /** * @} */ #endif /* I2C1 || I2C2 || I2C3 */ /** * @} */ #endif /* USE_FULL_LL_DRIVER */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/