Solution how to fix broken RTC on Nucleo_F103RB / STM32F103 BluePill etc..
Fork of Nucleo_RTC_battery_bkup_pwr_off_okay by
Experimental fork https://os.mbed.com/users/kenjiArai/code/Nucleo_RTC_battery_bkup_pwr_off_okay/ to fix broken RTC on Nucleo_F103RB / STM32F103 BluePill etc..
At this moment (7/11/17) use forked mbed-dev https://os.mbed.com/users/maxxir/code/mbed-dev/.
Or require patch for ./mbed-dev/targets/TARGET_STM/rtc_api.c.
You can manual add to your project fresh mbed-dev and change file mbed-dev\targets\TARGET_STM\rtc_api.c from root project patched rtc_api.c.stm32f10x.txt.
Exploring origin errors, I saw that something wrong with HAL API on STM32F1xx with this functions:
HAL_RTC_GetTime(&RtcHandle, &timeStruct, RTC_FORMAT_BIN); HAL_RTC_GetDate(&RtcHandle, &dateStruct, RTC_FORMAT_BIN); HAL_RTC_SetDate(&RtcHandle, &dateStruct, RTC_FORMAT_BIN); HAL_RTC_SetTime(&RtcHandle, &timeStruct, RTC_FORMAT_BIN);
Look here (as I understand it possible broken on STM32CUBE HAL level now):
https://community.st.com/thread/43218-stm32f103-loss-rtc-date-when-reset
So I use direct RTC register manipulation for STM32F1xx:
rtc_read(), rtc_write() (native rtc_init() - works good).
Also added stub for non-working on STM32F1xx rtc_read_subseconds().
Now the stm32F103 can survive power off, and allows you to get and set the time.
Tested OK on boards:
NUCLEO STM32F103RB, DIY STM32F100CB (forked from DISCO_F100RB)
Happy coding!
maxxir
10/11/17
rtc_api.c.stm32f10x.txt@12:dfd6bc5c6f2f, 2017-11-10 (annotated)
- Committer:
- maxxir
- Date:
- Fri Nov 10 05:42:31 2017 +0000
- Revision:
- 12:dfd6bc5c6f2f
Addded patched and renamed rtc_api.c to root of prj
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
maxxir | 12:dfd6bc5c6f2f | 1 | /* mbed Microcontroller Library |
maxxir | 12:dfd6bc5c6f2f | 2 | ******************************************************************************* |
maxxir | 12:dfd6bc5c6f2f | 3 | * Copyright (c) 2016, STMicroelectronics |
maxxir | 12:dfd6bc5c6f2f | 4 | * All rights reserved. |
maxxir | 12:dfd6bc5c6f2f | 5 | * |
maxxir | 12:dfd6bc5c6f2f | 6 | * Redistribution and use in source and binary forms, with or without |
maxxir | 12:dfd6bc5c6f2f | 7 | * modification, are permitted provided that the following conditions are met: |
maxxir | 12:dfd6bc5c6f2f | 8 | * |
maxxir | 12:dfd6bc5c6f2f | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
maxxir | 12:dfd6bc5c6f2f | 10 | * this list of conditions and the following disclaimer. |
maxxir | 12:dfd6bc5c6f2f | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
maxxir | 12:dfd6bc5c6f2f | 12 | * this list of conditions and the following disclaimer in the documentation |
maxxir | 12:dfd6bc5c6f2f | 13 | * and/or other materials provided with the distribution. |
maxxir | 12:dfd6bc5c6f2f | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
maxxir | 12:dfd6bc5c6f2f | 15 | * may be used to endorse or promote products derived from this software |
maxxir | 12:dfd6bc5c6f2f | 16 | * without specific prior written permission. |
maxxir | 12:dfd6bc5c6f2f | 17 | * |
maxxir | 12:dfd6bc5c6f2f | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
maxxir | 12:dfd6bc5c6f2f | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
maxxir | 12:dfd6bc5c6f2f | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
maxxir | 12:dfd6bc5c6f2f | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
maxxir | 12:dfd6bc5c6f2f | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
maxxir | 12:dfd6bc5c6f2f | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
maxxir | 12:dfd6bc5c6f2f | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
maxxir | 12:dfd6bc5c6f2f | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
maxxir | 12:dfd6bc5c6f2f | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
maxxir | 12:dfd6bc5c6f2f | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
maxxir | 12:dfd6bc5c6f2f | 28 | ******************************************************************************* |
maxxir | 12:dfd6bc5c6f2f | 29 | */ |
maxxir | 12:dfd6bc5c6f2f | 30 | #if DEVICE_RTC |
maxxir | 12:dfd6bc5c6f2f | 31 | |
maxxir | 12:dfd6bc5c6f2f | 32 | #include "rtc_api.h" |
maxxir | 12:dfd6bc5c6f2f | 33 | #include "rtc_api_hal.h" |
maxxir | 12:dfd6bc5c6f2f | 34 | #include "mbed_error.h" |
maxxir | 12:dfd6bc5c6f2f | 35 | #include "mbed_mktime.h" |
maxxir | 12:dfd6bc5c6f2f | 36 | |
maxxir | 12:dfd6bc5c6f2f | 37 | static RTC_HandleTypeDef RtcHandle; |
maxxir | 12:dfd6bc5c6f2f | 38 | |
maxxir | 12:dfd6bc5c6f2f | 39 | #if RTC_LSI |
maxxir | 12:dfd6bc5c6f2f | 40 | #define RTC_CLOCK LSI_VALUE |
maxxir | 12:dfd6bc5c6f2f | 41 | #else |
maxxir | 12:dfd6bc5c6f2f | 42 | #define RTC_CLOCK LSE_VALUE |
maxxir | 12:dfd6bc5c6f2f | 43 | #endif |
maxxir | 12:dfd6bc5c6f2f | 44 | |
maxxir | 12:dfd6bc5c6f2f | 45 | #if DEVICE_LOWPOWERTIMER |
maxxir | 12:dfd6bc5c6f2f | 46 | #define RTC_ASYNCH_PREDIV ((RTC_CLOCK - 1) / 0x8000) |
maxxir | 12:dfd6bc5c6f2f | 47 | #define RTC_SYNCH_PREDIV (RTC_CLOCK / (RTC_ASYNCH_PREDIV + 1) - 1) |
maxxir | 12:dfd6bc5c6f2f | 48 | #else |
maxxir | 12:dfd6bc5c6f2f | 49 | #define RTC_ASYNCH_PREDIV (0x007F) |
maxxir | 12:dfd6bc5c6f2f | 50 | #define RTC_SYNCH_PREDIV (RTC_CLOCK / (RTC_ASYNCH_PREDIV + 1) - 1) |
maxxir | 12:dfd6bc5c6f2f | 51 | #endif |
maxxir | 12:dfd6bc5c6f2f | 52 | |
maxxir | 12:dfd6bc5c6f2f | 53 | #if DEVICE_LOWPOWERTIMER |
maxxir | 12:dfd6bc5c6f2f | 54 | static void (*irq_handler)(void); |
maxxir | 12:dfd6bc5c6f2f | 55 | static void RTC_IRQHandler(void); |
maxxir | 12:dfd6bc5c6f2f | 56 | #endif |
maxxir | 12:dfd6bc5c6f2f | 57 | |
maxxir | 12:dfd6bc5c6f2f | 58 | void rtc_init(void) |
maxxir | 12:dfd6bc5c6f2f | 59 | { |
maxxir | 12:dfd6bc5c6f2f | 60 | RCC_OscInitTypeDef RCC_OscInitStruct = {0}; |
maxxir | 12:dfd6bc5c6f2f | 61 | RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0}; |
maxxir | 12:dfd6bc5c6f2f | 62 | |
maxxir | 12:dfd6bc5c6f2f | 63 | // Enable access to Backup domain |
maxxir | 12:dfd6bc5c6f2f | 64 | HAL_PWR_EnableBkUpAccess(); |
maxxir | 12:dfd6bc5c6f2f | 65 | |
maxxir | 12:dfd6bc5c6f2f | 66 | RtcHandle.Instance = RTC; |
maxxir | 12:dfd6bc5c6f2f | 67 | RtcHandle.State = HAL_RTC_STATE_RESET; |
maxxir | 12:dfd6bc5c6f2f | 68 | |
maxxir | 12:dfd6bc5c6f2f | 69 | #if !RTC_LSI |
maxxir | 12:dfd6bc5c6f2f | 70 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; |
maxxir | 12:dfd6bc5c6f2f | 71 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured! |
maxxir | 12:dfd6bc5c6f2f | 72 | RCC_OscInitStruct.LSEState = RCC_LSE_ON; |
maxxir | 12:dfd6bc5c6f2f | 73 | RCC_OscInitStruct.LSIState = RCC_LSI_OFF; |
maxxir | 12:dfd6bc5c6f2f | 74 | |
maxxir | 12:dfd6bc5c6f2f | 75 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { |
maxxir | 12:dfd6bc5c6f2f | 76 | __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE); |
maxxir | 12:dfd6bc5c6f2f | 77 | __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE); |
maxxir | 12:dfd6bc5c6f2f | 78 | } else { |
maxxir | 12:dfd6bc5c6f2f | 79 | error("Cannot initialize RTC with LSE\n"); |
maxxir | 12:dfd6bc5c6f2f | 80 | } |
maxxir | 12:dfd6bc5c6f2f | 81 | |
maxxir | 12:dfd6bc5c6f2f | 82 | PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; |
maxxir | 12:dfd6bc5c6f2f | 83 | PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; |
maxxir | 12:dfd6bc5c6f2f | 84 | if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) { |
maxxir | 12:dfd6bc5c6f2f | 85 | error("PeriphClkInitStruct RTC failed with LSE\n"); |
maxxir | 12:dfd6bc5c6f2f | 86 | } |
maxxir | 12:dfd6bc5c6f2f | 87 | #else /* !RTC_LSI */ |
maxxir | 12:dfd6bc5c6f2f | 88 | __HAL_RCC_PWR_CLK_ENABLE(); |
maxxir | 12:dfd6bc5c6f2f | 89 | |
maxxir | 12:dfd6bc5c6f2f | 90 | // Reset Backup domain |
maxxir | 12:dfd6bc5c6f2f | 91 | __HAL_RCC_BACKUPRESET_FORCE(); |
maxxir | 12:dfd6bc5c6f2f | 92 | __HAL_RCC_BACKUPRESET_RELEASE(); |
maxxir | 12:dfd6bc5c6f2f | 93 | |
maxxir | 12:dfd6bc5c6f2f | 94 | // Enable LSI clock |
maxxir | 12:dfd6bc5c6f2f | 95 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI; |
maxxir | 12:dfd6bc5c6f2f | 96 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured! |
maxxir | 12:dfd6bc5c6f2f | 97 | RCC_OscInitStruct.LSEState = RCC_LSE_OFF; |
maxxir | 12:dfd6bc5c6f2f | 98 | RCC_OscInitStruct.LSIState = RCC_LSI_ON; |
maxxir | 12:dfd6bc5c6f2f | 99 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
maxxir | 12:dfd6bc5c6f2f | 100 | error("Cannot initialize RTC with LSI\n"); |
maxxir | 12:dfd6bc5c6f2f | 101 | } |
maxxir | 12:dfd6bc5c6f2f | 102 | |
maxxir | 12:dfd6bc5c6f2f | 103 | __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI); |
maxxir | 12:dfd6bc5c6f2f | 104 | __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI); |
maxxir | 12:dfd6bc5c6f2f | 105 | |
maxxir | 12:dfd6bc5c6f2f | 106 | PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; |
maxxir | 12:dfd6bc5c6f2f | 107 | PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI; |
maxxir | 12:dfd6bc5c6f2f | 108 | if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) { |
maxxir | 12:dfd6bc5c6f2f | 109 | error("PeriphClkInitStruct RTC failed with LSI\n"); |
maxxir | 12:dfd6bc5c6f2f | 110 | } |
maxxir | 12:dfd6bc5c6f2f | 111 | #endif /* !RTC_LSI */ |
maxxir | 12:dfd6bc5c6f2f | 112 | |
maxxir | 12:dfd6bc5c6f2f | 113 | // Enable RTC |
maxxir | 12:dfd6bc5c6f2f | 114 | __HAL_RCC_RTC_ENABLE(); |
maxxir | 12:dfd6bc5c6f2f | 115 | |
maxxir | 12:dfd6bc5c6f2f | 116 | #if TARGET_STM32F1 |
maxxir | 12:dfd6bc5c6f2f | 117 | RtcHandle.Init.AsynchPrediv = RTC_AUTO_1_SECOND; |
maxxir | 12:dfd6bc5c6f2f | 118 | #else /* TARGET_STM32F1 */ |
maxxir | 12:dfd6bc5c6f2f | 119 | RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24; |
maxxir | 12:dfd6bc5c6f2f | 120 | RtcHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV; |
maxxir | 12:dfd6bc5c6f2f | 121 | RtcHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV; |
maxxir | 12:dfd6bc5c6f2f | 122 | RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE; |
maxxir | 12:dfd6bc5c6f2f | 123 | RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; |
maxxir | 12:dfd6bc5c6f2f | 124 | RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; |
maxxir | 12:dfd6bc5c6f2f | 125 | #endif /* TARGET_STM32F1 */ |
maxxir | 12:dfd6bc5c6f2f | 126 | |
maxxir | 12:dfd6bc5c6f2f | 127 | if (HAL_RTC_Init(&RtcHandle) != HAL_OK) { |
maxxir | 12:dfd6bc5c6f2f | 128 | error("RTC error: RTC initialization failed."); |
maxxir | 12:dfd6bc5c6f2f | 129 | } |
maxxir | 12:dfd6bc5c6f2f | 130 | |
maxxir | 12:dfd6bc5c6f2f | 131 | #if DEVICE_LOWPOWERTIMER |
maxxir | 12:dfd6bc5c6f2f | 132 | |
maxxir | 12:dfd6bc5c6f2f | 133 | #if !RTC_LSI |
maxxir | 12:dfd6bc5c6f2f | 134 | if (!rtc_isenabled()) |
maxxir | 12:dfd6bc5c6f2f | 135 | #endif /* !RTC_LSI */ |
maxxir | 12:dfd6bc5c6f2f | 136 | { |
maxxir | 12:dfd6bc5c6f2f | 137 | rtc_write(0); |
maxxir | 12:dfd6bc5c6f2f | 138 | } |
maxxir | 12:dfd6bc5c6f2f | 139 | |
maxxir | 12:dfd6bc5c6f2f | 140 | NVIC_ClearPendingIRQ(RTC_WKUP_IRQn); |
maxxir | 12:dfd6bc5c6f2f | 141 | NVIC_DisableIRQ(RTC_WKUP_IRQn); |
maxxir | 12:dfd6bc5c6f2f | 142 | NVIC_SetVector(RTC_WKUP_IRQn, (uint32_t)RTC_IRQHandler); |
maxxir | 12:dfd6bc5c6f2f | 143 | NVIC_EnableIRQ(RTC_WKUP_IRQn); |
maxxir | 12:dfd6bc5c6f2f | 144 | |
maxxir | 12:dfd6bc5c6f2f | 145 | #endif /* DEVICE_LOWPOWERTIMER */ |
maxxir | 12:dfd6bc5c6f2f | 146 | } |
maxxir | 12:dfd6bc5c6f2f | 147 | |
maxxir | 12:dfd6bc5c6f2f | 148 | void rtc_free(void) |
maxxir | 12:dfd6bc5c6f2f | 149 | { |
maxxir | 12:dfd6bc5c6f2f | 150 | #if RTC_LSI |
maxxir | 12:dfd6bc5c6f2f | 151 | // Enable Power clock |
maxxir | 12:dfd6bc5c6f2f | 152 | __HAL_RCC_PWR_CLK_ENABLE(); |
maxxir | 12:dfd6bc5c6f2f | 153 | |
maxxir | 12:dfd6bc5c6f2f | 154 | // Enable access to Backup domain |
maxxir | 12:dfd6bc5c6f2f | 155 | HAL_PWR_EnableBkUpAccess(); |
maxxir | 12:dfd6bc5c6f2f | 156 | |
maxxir | 12:dfd6bc5c6f2f | 157 | // Reset Backup domain |
maxxir | 12:dfd6bc5c6f2f | 158 | __HAL_RCC_BACKUPRESET_FORCE(); |
maxxir | 12:dfd6bc5c6f2f | 159 | __HAL_RCC_BACKUPRESET_RELEASE(); |
maxxir | 12:dfd6bc5c6f2f | 160 | |
maxxir | 12:dfd6bc5c6f2f | 161 | // Disable access to Backup domain |
maxxir | 12:dfd6bc5c6f2f | 162 | HAL_PWR_DisableBkUpAccess(); |
maxxir | 12:dfd6bc5c6f2f | 163 | #endif |
maxxir | 12:dfd6bc5c6f2f | 164 | |
maxxir | 12:dfd6bc5c6f2f | 165 | // Disable LSI and LSE clocks |
maxxir | 12:dfd6bc5c6f2f | 166 | RCC_OscInitTypeDef RCC_OscInitStruct = {0}; |
maxxir | 12:dfd6bc5c6f2f | 167 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE; |
maxxir | 12:dfd6bc5c6f2f | 168 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
maxxir | 12:dfd6bc5c6f2f | 169 | RCC_OscInitStruct.LSIState = RCC_LSI_OFF; |
maxxir | 12:dfd6bc5c6f2f | 170 | RCC_OscInitStruct.LSEState = RCC_LSE_OFF; |
maxxir | 12:dfd6bc5c6f2f | 171 | HAL_RCC_OscConfig(&RCC_OscInitStruct); |
maxxir | 12:dfd6bc5c6f2f | 172 | } |
maxxir | 12:dfd6bc5c6f2f | 173 | |
maxxir | 12:dfd6bc5c6f2f | 174 | /* |
maxxir | 12:dfd6bc5c6f2f | 175 | ST RTC_DateTypeDef structure |
maxxir | 12:dfd6bc5c6f2f | 176 | WeekDay 1=monday, 2=tuesday, ..., 7=sunday |
maxxir | 12:dfd6bc5c6f2f | 177 | Month 0x1=january, 0x2=february, ..., 0x12=december |
maxxir | 12:dfd6bc5c6f2f | 178 | Date day of the month 1-31 |
maxxir | 12:dfd6bc5c6f2f | 179 | Year year 0-99 |
maxxir | 12:dfd6bc5c6f2f | 180 | |
maxxir | 12:dfd6bc5c6f2f | 181 | ST RTC_TimeTypeDef structure |
maxxir | 12:dfd6bc5c6f2f | 182 | Hours 0-12 if the RTC_HourFormat_12 is selected during init |
maxxir | 12:dfd6bc5c6f2f | 183 | 0-23 if the RTC_HourFormat_24 is selected during init |
maxxir | 12:dfd6bc5c6f2f | 184 | Minutes 0-59 |
maxxir | 12:dfd6bc5c6f2f | 185 | Seconds 0-59 |
maxxir | 12:dfd6bc5c6f2f | 186 | TimeFormat RTC_HOURFORMAT12_AM/RTC_HOURFORMAT12_PM |
maxxir | 12:dfd6bc5c6f2f | 187 | SubSeconds time unit range between [0-1] Second with [1 Sec / SecondFraction +1] granularity |
maxxir | 12:dfd6bc5c6f2f | 188 | SecondFraction range or granularity of Sub Second register content corresponding to Synchronous pre-scaler factor value (PREDIV_S) |
maxxir | 12:dfd6bc5c6f2f | 189 | DayLightSaving RTC_DAYLIGHTSAVING_SUB1H/RTC_DAYLIGHTSAVING_ADD1H/RTC_DAYLIGHTSAVING_NONE |
maxxir | 12:dfd6bc5c6f2f | 190 | StoreOperation RTC_STOREOPERATION_RESET/RTC_STOREOPERATION_SET |
maxxir | 12:dfd6bc5c6f2f | 191 | |
maxxir | 12:dfd6bc5c6f2f | 192 | struct tm |
maxxir | 12:dfd6bc5c6f2f | 193 | tm_sec seconds after the minute 0-61 |
maxxir | 12:dfd6bc5c6f2f | 194 | tm_min minutes after the hour 0-59 |
maxxir | 12:dfd6bc5c6f2f | 195 | tm_hour hours since midnight 0-23 |
maxxir | 12:dfd6bc5c6f2f | 196 | tm_mday day of the month 1-31 |
maxxir | 12:dfd6bc5c6f2f | 197 | tm_mon months since January 0-11 |
maxxir | 12:dfd6bc5c6f2f | 198 | tm_year years since 1900 |
maxxir | 12:dfd6bc5c6f2f | 199 | tm_wday days since Sunday 0-6 |
maxxir | 12:dfd6bc5c6f2f | 200 | tm_yday days since January 1 0-365 |
maxxir | 12:dfd6bc5c6f2f | 201 | tm_isdst Daylight Saving Time flag |
maxxir | 12:dfd6bc5c6f2f | 202 | */ |
maxxir | 12:dfd6bc5c6f2f | 203 | |
maxxir | 12:dfd6bc5c6f2f | 204 | /* |
maxxir | 12:dfd6bc5c6f2f | 205 | Information about STM32F0, STM32F2, STM32F3, STM32F4, STM32F7, STM32L0, STM32L1, STM32L4: |
maxxir | 12:dfd6bc5c6f2f | 206 | BCD format is used to store the date in the RTC. The year is store on 2 * 4 bits. |
maxxir | 12:dfd6bc5c6f2f | 207 | Because the first year is reserved to see if the RTC is init, the supposed range is 01-99. |
maxxir | 12:dfd6bc5c6f2f | 208 | 1st point is to cover the standard range from 1970 to 2038 (limited by the 32 bits of time_t). |
maxxir | 12:dfd6bc5c6f2f | 209 | 2nd point is to keep the year 1970 and the leap years synchronized. |
maxxir | 12:dfd6bc5c6f2f | 210 | |
maxxir | 12:dfd6bc5c6f2f | 211 | So by moving it 68 years forward from 1970, it become 1969-2067 which include 1970-2038. |
maxxir | 12:dfd6bc5c6f2f | 212 | 68 is also a multiple of 4 so it let the leap year synchronized. |
maxxir | 12:dfd6bc5c6f2f | 213 | |
maxxir | 12:dfd6bc5c6f2f | 214 | Information about STM32F1: |
maxxir | 12:dfd6bc5c6f2f | 215 | 32bit register is used (no BCD format) for the seconds and a software structure to store dates. |
maxxir | 12:dfd6bc5c6f2f | 216 | It is then not a problem to not use shifts. |
maxxir | 12:dfd6bc5c6f2f | 217 | */ |
maxxir | 12:dfd6bc5c6f2f | 218 | |
maxxir | 12:dfd6bc5c6f2f | 219 | time_t rtc_read(void) |
maxxir | 12:dfd6bc5c6f2f | 220 | { |
maxxir | 12:dfd6bc5c6f2f | 221 | #if (TARGET_STM32F1) |
maxxir | 12:dfd6bc5c6f2f | 222 | time_t seconds; |
maxxir | 12:dfd6bc5c6f2f | 223 | seconds = ((uint32_t)RTC->CNTH << 16) | RTC->CNTL; |
maxxir | 12:dfd6bc5c6f2f | 224 | return seconds; |
maxxir | 12:dfd6bc5c6f2f | 225 | #else |
maxxir | 12:dfd6bc5c6f2f | 226 | RTC_DateTypeDef dateStruct = {0}; |
maxxir | 12:dfd6bc5c6f2f | 227 | RTC_TimeTypeDef timeStruct = {0}; |
maxxir | 12:dfd6bc5c6f2f | 228 | struct tm timeinfo; |
maxxir | 12:dfd6bc5c6f2f | 229 | |
maxxir | 12:dfd6bc5c6f2f | 230 | RtcHandle.Instance = RTC; |
maxxir | 12:dfd6bc5c6f2f | 231 | |
maxxir | 12:dfd6bc5c6f2f | 232 | // Read actual date and time |
maxxir | 12:dfd6bc5c6f2f | 233 | // Warning: the time must be read first! |
maxxir | 12:dfd6bc5c6f2f | 234 | HAL_RTC_GetTime(&RtcHandle, &timeStruct, RTC_FORMAT_BIN); |
maxxir | 12:dfd6bc5c6f2f | 235 | HAL_RTC_GetDate(&RtcHandle, &dateStruct, RTC_FORMAT_BIN); |
maxxir | 12:dfd6bc5c6f2f | 236 | |
maxxir | 12:dfd6bc5c6f2f | 237 | // Setup a tm structure based on the RTC |
maxxir | 12:dfd6bc5c6f2f | 238 | /* tm_wday information is ignored by mktime */ |
maxxir | 12:dfd6bc5c6f2f | 239 | timeinfo.tm_mon = dateStruct.Month - 1; |
maxxir | 12:dfd6bc5c6f2f | 240 | timeinfo.tm_mday = dateStruct.Date; |
maxxir | 12:dfd6bc5c6f2f | 241 | timeinfo.tm_year = dateStruct.Year + 68; |
maxxir | 12:dfd6bc5c6f2f | 242 | timeinfo.tm_hour = timeStruct.Hours; |
maxxir | 12:dfd6bc5c6f2f | 243 | timeinfo.tm_min = timeStruct.Minutes; |
maxxir | 12:dfd6bc5c6f2f | 244 | timeinfo.tm_sec = timeStruct.Seconds; |
maxxir | 12:dfd6bc5c6f2f | 245 | // Daylight Saving Time information is not available |
maxxir | 12:dfd6bc5c6f2f | 246 | timeinfo.tm_isdst = -1; |
maxxir | 12:dfd6bc5c6f2f | 247 | |
maxxir | 12:dfd6bc5c6f2f | 248 | // Convert to timestamp |
maxxir | 12:dfd6bc5c6f2f | 249 | time_t t = _rtc_mktime(&timeinfo); |
maxxir | 12:dfd6bc5c6f2f | 250 | |
maxxir | 12:dfd6bc5c6f2f | 251 | return t; |
maxxir | 12:dfd6bc5c6f2f | 252 | #endif |
maxxir | 12:dfd6bc5c6f2f | 253 | } |
maxxir | 12:dfd6bc5c6f2f | 254 | |
maxxir | 12:dfd6bc5c6f2f | 255 | void rtc_write(time_t t) |
maxxir | 12:dfd6bc5c6f2f | 256 | { |
maxxir | 12:dfd6bc5c6f2f | 257 | #if (TARGET_STM32F1) |
maxxir | 12:dfd6bc5c6f2f | 258 | /* Change the current time */ |
maxxir | 12:dfd6bc5c6f2f | 259 | RTC->CRL |= RTC_CRL_CNF;// заходим в режим конфигурации |
maxxir | 12:dfd6bc5c6f2f | 260 | RTC->CNTH = t>>16; |
maxxir | 12:dfd6bc5c6f2f | 261 | RTC->CNTL = t; |
maxxir | 12:dfd6bc5c6f2f | 262 | RTC->CRL &= ~RTC_CRL_CNF; // выходим из режима конфигурации} |
maxxir | 12:dfd6bc5c6f2f | 263 | #else |
maxxir | 12:dfd6bc5c6f2f | 264 | RTC_DateTypeDef dateStruct = {0}; |
maxxir | 12:dfd6bc5c6f2f | 265 | RTC_TimeTypeDef timeStruct = {0}; |
maxxir | 12:dfd6bc5c6f2f | 266 | |
maxxir | 12:dfd6bc5c6f2f | 267 | RtcHandle.Instance = RTC; |
maxxir | 12:dfd6bc5c6f2f | 268 | |
maxxir | 12:dfd6bc5c6f2f | 269 | // Convert the time into a tm |
maxxir | 12:dfd6bc5c6f2f | 270 | struct tm timeinfo; |
maxxir | 12:dfd6bc5c6f2f | 271 | if (_rtc_localtime(t, &timeinfo) == false) { |
maxxir | 12:dfd6bc5c6f2f | 272 | return; |
maxxir | 12:dfd6bc5c6f2f | 273 | } |
maxxir | 12:dfd6bc5c6f2f | 274 | |
maxxir | 12:dfd6bc5c6f2f | 275 | // Fill RTC structures |
maxxir | 12:dfd6bc5c6f2f | 276 | if (timeinfo.tm_wday == 0) { |
maxxir | 12:dfd6bc5c6f2f | 277 | dateStruct.WeekDay = 7; |
maxxir | 12:dfd6bc5c6f2f | 278 | } else { |
maxxir | 12:dfd6bc5c6f2f | 279 | dateStruct.WeekDay = timeinfo.tm_wday; |
maxxir | 12:dfd6bc5c6f2f | 280 | } |
maxxir | 12:dfd6bc5c6f2f | 281 | dateStruct.Month = timeinfo.tm_mon + 1; |
maxxir | 12:dfd6bc5c6f2f | 282 | dateStruct.Date = timeinfo.tm_mday; |
maxxir | 12:dfd6bc5c6f2f | 283 | dateStruct.Year = timeinfo.tm_year - 68; |
maxxir | 12:dfd6bc5c6f2f | 284 | timeStruct.Hours = timeinfo.tm_hour; |
maxxir | 12:dfd6bc5c6f2f | 285 | timeStruct.Minutes = timeinfo.tm_min; |
maxxir | 12:dfd6bc5c6f2f | 286 | timeStruct.Seconds = timeinfo.tm_sec; |
maxxir | 12:dfd6bc5c6f2f | 287 | |
maxxir | 12:dfd6bc5c6f2f | 288 | #if !(TARGET_STM32F1) |
maxxir | 12:dfd6bc5c6f2f | 289 | timeStruct.TimeFormat = RTC_HOURFORMAT_24; |
maxxir | 12:dfd6bc5c6f2f | 290 | timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE; |
maxxir | 12:dfd6bc5c6f2f | 291 | timeStruct.StoreOperation = RTC_STOREOPERATION_RESET; |
maxxir | 12:dfd6bc5c6f2f | 292 | #endif /* TARGET_STM32F1 */ |
maxxir | 12:dfd6bc5c6f2f | 293 | |
maxxir | 12:dfd6bc5c6f2f | 294 | // Change the RTC current date/time |
maxxir | 12:dfd6bc5c6f2f | 295 | HAL_RTC_SetDate(&RtcHandle, &dateStruct, RTC_FORMAT_BIN); |
maxxir | 12:dfd6bc5c6f2f | 296 | HAL_RTC_SetTime(&RtcHandle, &timeStruct, RTC_FORMAT_BIN); |
maxxir | 12:dfd6bc5c6f2f | 297 | #endif |
maxxir | 12:dfd6bc5c6f2f | 298 | } |
maxxir | 12:dfd6bc5c6f2f | 299 | |
maxxir | 12:dfd6bc5c6f2f | 300 | int rtc_isenabled(void) |
maxxir | 12:dfd6bc5c6f2f | 301 | { |
maxxir | 12:dfd6bc5c6f2f | 302 | #if !(TARGET_STM32F1) |
maxxir | 12:dfd6bc5c6f2f | 303 | return ( ((RTC->ISR & RTC_ISR_INITS) == RTC_ISR_INITS) && ((RTC->ISR & RTC_ISR_RSF) == RTC_ISR_RSF) ); |
maxxir | 12:dfd6bc5c6f2f | 304 | #else /* TARGET_STM32F1 */ |
maxxir | 12:dfd6bc5c6f2f | 305 | return ((RTC->CRL & RTC_CRL_RSF) == RTC_CRL_RSF); |
maxxir | 12:dfd6bc5c6f2f | 306 | #endif /* TARGET_STM32F1 */ |
maxxir | 12:dfd6bc5c6f2f | 307 | } |
maxxir | 12:dfd6bc5c6f2f | 308 | |
maxxir | 12:dfd6bc5c6f2f | 309 | #if DEVICE_LOWPOWERTIMER |
maxxir | 12:dfd6bc5c6f2f | 310 | |
maxxir | 12:dfd6bc5c6f2f | 311 | static void RTC_IRQHandler(void) |
maxxir | 12:dfd6bc5c6f2f | 312 | { |
maxxir | 12:dfd6bc5c6f2f | 313 | /* Update HAL state */ |
maxxir | 12:dfd6bc5c6f2f | 314 | HAL_RTCEx_WakeUpTimerIRQHandler(&RtcHandle); |
maxxir | 12:dfd6bc5c6f2f | 315 | /* In case of registered handler, call it. */ |
maxxir | 12:dfd6bc5c6f2f | 316 | if (irq_handler) { |
maxxir | 12:dfd6bc5c6f2f | 317 | irq_handler(); |
maxxir | 12:dfd6bc5c6f2f | 318 | } |
maxxir | 12:dfd6bc5c6f2f | 319 | } |
maxxir | 12:dfd6bc5c6f2f | 320 | |
maxxir | 12:dfd6bc5c6f2f | 321 | void rtc_set_irq_handler(uint32_t handler) |
maxxir | 12:dfd6bc5c6f2f | 322 | { |
maxxir | 12:dfd6bc5c6f2f | 323 | irq_handler = (void (*)(void))handler; |
maxxir | 12:dfd6bc5c6f2f | 324 | } |
maxxir | 12:dfd6bc5c6f2f | 325 | |
maxxir | 12:dfd6bc5c6f2f | 326 | uint32_t rtc_read_subseconds(void) |
maxxir | 12:dfd6bc5c6f2f | 327 | { |
maxxir | 12:dfd6bc5c6f2f | 328 | #if (TARGET_STM32F1) |
maxxir | 12:dfd6bc5c6f2f | 329 | return 0; //Not exists on STM32F1 |
maxxir | 12:dfd6bc5c6f2f | 330 | #else |
maxxir | 12:dfd6bc5c6f2f | 331 | return 1000000.f * ((double)(RTC_SYNCH_PREDIV - RTC->SSR) / (RTC_SYNCH_PREDIV + 1)); |
maxxir | 12:dfd6bc5c6f2f | 332 | #endif |
maxxir | 12:dfd6bc5c6f2f | 333 | } |
maxxir | 12:dfd6bc5c6f2f | 334 | |
maxxir | 12:dfd6bc5c6f2f | 335 | void rtc_set_wake_up_timer(uint32_t delta) |
maxxir | 12:dfd6bc5c6f2f | 336 | { |
maxxir | 12:dfd6bc5c6f2f | 337 | uint32_t wake_up_counter = delta / (2000000 / RTC_CLOCK); |
maxxir | 12:dfd6bc5c6f2f | 338 | |
maxxir | 12:dfd6bc5c6f2f | 339 | if (HAL_RTCEx_SetWakeUpTimer_IT(&RtcHandle, wake_up_counter, |
maxxir | 12:dfd6bc5c6f2f | 340 | RTC_WAKEUPCLOCK_RTCCLK_DIV2) != HAL_OK) { |
maxxir | 12:dfd6bc5c6f2f | 341 | error("Set wake up timer failed\n"); |
maxxir | 12:dfd6bc5c6f2f | 342 | } |
maxxir | 12:dfd6bc5c6f2f | 343 | } |
maxxir | 12:dfd6bc5c6f2f | 344 | |
maxxir | 12:dfd6bc5c6f2f | 345 | void rtc_deactivate_wake_up_timer(void) |
maxxir | 12:dfd6bc5c6f2f | 346 | { |
maxxir | 12:dfd6bc5c6f2f | 347 | HAL_RTCEx_DeactivateWakeUpTimer(&RtcHandle); |
maxxir | 12:dfd6bc5c6f2f | 348 | } |
maxxir | 12:dfd6bc5c6f2f | 349 | |
maxxir | 12:dfd6bc5c6f2f | 350 | void rtc_synchronize(void) |
maxxir | 12:dfd6bc5c6f2f | 351 | { |
maxxir | 12:dfd6bc5c6f2f | 352 | HAL_RTC_WaitForSynchro(&RtcHandle); |
maxxir | 12:dfd6bc5c6f2f | 353 | } |
maxxir | 12:dfd6bc5c6f2f | 354 | #endif /* DEVICE_LOWPOWERTIMER */ |
maxxir | 12:dfd6bc5c6f2f | 355 | |
maxxir | 12:dfd6bc5c6f2f | 356 | #endif /* DEVICE_RTC */ |