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targets/hal/TARGET_STM/TARGET_STM32F7/rtc_api.c@0:e87aa4c49e95, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 21:51:46 2019 +0000
Revision:
0:e87aa4c49e95
libray

Who changed what in which revision?

UserRevisionLine numberNew contents of line
phungductung 0:e87aa4c49e95 1 /* mbed Microcontroller Library
phungductung 0:e87aa4c49e95 2 *******************************************************************************
phungductung 0:e87aa4c49e95 3 * Copyright (c) 2015, STMicroelectronics
phungductung 0:e87aa4c49e95 4 * All rights reserved.
phungductung 0:e87aa4c49e95 5 *
phungductung 0:e87aa4c49e95 6 * Redistribution and use in source and binary forms, with or without
phungductung 0:e87aa4c49e95 7 * modification, are permitted provided that the following conditions are met:
phungductung 0:e87aa4c49e95 8 *
phungductung 0:e87aa4c49e95 9 * 1. Redistributions of source code must retain the above copyright notice,
phungductung 0:e87aa4c49e95 10 * this list of conditions and the following disclaimer.
phungductung 0:e87aa4c49e95 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
phungductung 0:e87aa4c49e95 12 * this list of conditions and the following disclaimer in the documentation
phungductung 0:e87aa4c49e95 13 * and/or other materials provided with the distribution.
phungductung 0:e87aa4c49e95 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
phungductung 0:e87aa4c49e95 15 * may be used to endorse or promote products derived from this software
phungductung 0:e87aa4c49e95 16 * without specific prior written permission.
phungductung 0:e87aa4c49e95 17 *
phungductung 0:e87aa4c49e95 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
phungductung 0:e87aa4c49e95 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
phungductung 0:e87aa4c49e95 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
phungductung 0:e87aa4c49e95 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
phungductung 0:e87aa4c49e95 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
phungductung 0:e87aa4c49e95 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
phungductung 0:e87aa4c49e95 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
phungductung 0:e87aa4c49e95 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
phungductung 0:e87aa4c49e95 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
phungductung 0:e87aa4c49e95 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
phungductung 0:e87aa4c49e95 28 *******************************************************************************
phungductung 0:e87aa4c49e95 29 */
phungductung 0:e87aa4c49e95 30 #include "rtc_api.h"
phungductung 0:e87aa4c49e95 31
phungductung 0:e87aa4c49e95 32 #if DEVICE_RTC
phungductung 0:e87aa4c49e95 33
phungductung 0:e87aa4c49e95 34 #include "mbed_error.h"
phungductung 0:e87aa4c49e95 35
phungductung 0:e87aa4c49e95 36 #if DEVICE_RTC_LSI
phungductung 0:e87aa4c49e95 37 static int rtc_inited = 0;
phungductung 0:e87aa4c49e95 38 #endif
phungductung 0:e87aa4c49e95 39
phungductung 0:e87aa4c49e95 40 static RTC_HandleTypeDef RtcHandle;
phungductung 0:e87aa4c49e95 41
phungductung 0:e87aa4c49e95 42 void rtc_init(void)
phungductung 0:e87aa4c49e95 43 {
phungductung 0:e87aa4c49e95 44 RCC_OscInitTypeDef RCC_OscInitStruct;
phungductung 0:e87aa4c49e95 45 uint32_t rtc_freq = 0;
phungductung 0:e87aa4c49e95 46
phungductung 0:e87aa4c49e95 47 RtcHandle.Instance = RTC;
phungductung 0:e87aa4c49e95 48
phungductung 0:e87aa4c49e95 49 #if !DEVICE_RTC_LSI
phungductung 0:e87aa4c49e95 50 // Enable LSE Oscillator
phungductung 0:e87aa4c49e95 51 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
phungductung 0:e87aa4c49e95 52 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
phungductung 0:e87aa4c49e95 53 RCC_OscInitStruct.LSEState = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT
phungductung 0:e87aa4c49e95 54 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
phungductung 0:e87aa4c49e95 55 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { // Check if LSE has started correctly
phungductung 0:e87aa4c49e95 56 // Connect LSE to RTC
phungductung 0:e87aa4c49e95 57 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE);
phungductung 0:e87aa4c49e95 58 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
phungductung 0:e87aa4c49e95 59 rtc_freq = LSE_VALUE;
phungductung 0:e87aa4c49e95 60 } else {
phungductung 0:e87aa4c49e95 61 error("Cannot initialize RTC with LSE\n");
phungductung 0:e87aa4c49e95 62 }
phungductung 0:e87aa4c49e95 63 #else
phungductung 0:e87aa4c49e95 64 // Enable Power clock
phungductung 0:e87aa4c49e95 65 __PWR_CLK_ENABLE();
phungductung 0:e87aa4c49e95 66
phungductung 0:e87aa4c49e95 67 // Enable access to Backup domain
phungductung 0:e87aa4c49e95 68 HAL_PWR_EnableBkUpAccess();
phungductung 0:e87aa4c49e95 69
phungductung 0:e87aa4c49e95 70 // Reset Backup domain
phungductung 0:e87aa4c49e95 71 __HAL_RCC_BACKUPRESET_FORCE();
phungductung 0:e87aa4c49e95 72 __HAL_RCC_BACKUPRESET_RELEASE();
phungductung 0:e87aa4c49e95 73
phungductung 0:e87aa4c49e95 74 // Enable LSI clock
phungductung 0:e87aa4c49e95 75 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
phungductung 0:e87aa4c49e95 76 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
phungductung 0:e87aa4c49e95 77 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
phungductung 0:e87aa4c49e95 78 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
phungductung 0:e87aa4c49e95 79 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
phungductung 0:e87aa4c49e95 80 error("Cannot initialize RTC with LSI\n");
phungductung 0:e87aa4c49e95 81 }
phungductung 0:e87aa4c49e95 82 // Connect LSI to RTC
phungductung 0:e87aa4c49e95 83 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
phungductung 0:e87aa4c49e95 84 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
phungductung 0:e87aa4c49e95 85 // This value is LSI typical value. To be measured precisely using a timer input capture for example.
phungductung 0:e87aa4c49e95 86 rtc_freq = LSI_VALUE;
phungductung 0:e87aa4c49e95 87 #endif
phungductung 0:e87aa4c49e95 88
phungductung 0:e87aa4c49e95 89 // Enable RTC
phungductung 0:e87aa4c49e95 90 __HAL_RCC_RTC_ENABLE();
phungductung 0:e87aa4c49e95 91
phungductung 0:e87aa4c49e95 92 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
phungductung 0:e87aa4c49e95 93 RtcHandle.Init.AsynchPrediv = 127;
phungductung 0:e87aa4c49e95 94 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
phungductung 0:e87aa4c49e95 95 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
phungductung 0:e87aa4c49e95 96 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
phungductung 0:e87aa4c49e95 97 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
phungductung 0:e87aa4c49e95 98
phungductung 0:e87aa4c49e95 99 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
phungductung 0:e87aa4c49e95 100 error("RTC error: RTC initialization failed.");
phungductung 0:e87aa4c49e95 101 }
phungductung 0:e87aa4c49e95 102 }
phungductung 0:e87aa4c49e95 103
phungductung 0:e87aa4c49e95 104 void rtc_free(void)
phungductung 0:e87aa4c49e95 105 {
phungductung 0:e87aa4c49e95 106 #if DEVICE_RTC_LSI
phungductung 0:e87aa4c49e95 107 // Enable Power clock
phungductung 0:e87aa4c49e95 108 __PWR_CLK_ENABLE();
phungductung 0:e87aa4c49e95 109
phungductung 0:e87aa4c49e95 110 // Enable access to Backup domain
phungductung 0:e87aa4c49e95 111 HAL_PWR_EnableBkUpAccess();
phungductung 0:e87aa4c49e95 112
phungductung 0:e87aa4c49e95 113 // Reset Backup domain
phungductung 0:e87aa4c49e95 114 __HAL_RCC_BACKUPRESET_FORCE();
phungductung 0:e87aa4c49e95 115 __HAL_RCC_BACKUPRESET_RELEASE();
phungductung 0:e87aa4c49e95 116
phungductung 0:e87aa4c49e95 117 // Disable access to Backup domain
phungductung 0:e87aa4c49e95 118 HAL_PWR_DisableBkUpAccess();
phungductung 0:e87aa4c49e95 119 #endif
phungductung 0:e87aa4c49e95 120
phungductung 0:e87aa4c49e95 121 // Disable LSI and LSE clocks
phungductung 0:e87aa4c49e95 122 RCC_OscInitTypeDef RCC_OscInitStruct;
phungductung 0:e87aa4c49e95 123 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
phungductung 0:e87aa4c49e95 124 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
phungductung 0:e87aa4c49e95 125 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
phungductung 0:e87aa4c49e95 126 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
phungductung 0:e87aa4c49e95 127 HAL_RCC_OscConfig(&RCC_OscInitStruct);
phungductung 0:e87aa4c49e95 128
phungductung 0:e87aa4c49e95 129 #if DEVICE_RTC_LSI
phungductung 0:e87aa4c49e95 130 rtc_inited = 0;
phungductung 0:e87aa4c49e95 131 #endif
phungductung 0:e87aa4c49e95 132 }
phungductung 0:e87aa4c49e95 133
phungductung 0:e87aa4c49e95 134 int rtc_isenabled(void)
phungductung 0:e87aa4c49e95 135 {
phungductung 0:e87aa4c49e95 136 #if DEVICE_RTC_LSI
phungductung 0:e87aa4c49e95 137 return rtc_inited;
phungductung 0:e87aa4c49e95 138 #else
phungductung 0:e87aa4c49e95 139 if ((RTC->ISR & RTC_ISR_INITS) == RTC_ISR_INITS) {
phungductung 0:e87aa4c49e95 140 return 1;
phungductung 0:e87aa4c49e95 141 } else {
phungductung 0:e87aa4c49e95 142 return 0;
phungductung 0:e87aa4c49e95 143 }
phungductung 0:e87aa4c49e95 144 #endif
phungductung 0:e87aa4c49e95 145 }
phungductung 0:e87aa4c49e95 146
phungductung 0:e87aa4c49e95 147 /*
phungductung 0:e87aa4c49e95 148 RTC Registers
phungductung 0:e87aa4c49e95 149 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
phungductung 0:e87aa4c49e95 150 RTC_Month 1=january, 2=february, ..., 12=december
phungductung 0:e87aa4c49e95 151 RTC_Date day of the month 1-31
phungductung 0:e87aa4c49e95 152 RTC_Year year 0-99
phungductung 0:e87aa4c49e95 153 struct tm
phungductung 0:e87aa4c49e95 154 tm_sec seconds after the minute 0-61
phungductung 0:e87aa4c49e95 155 tm_min minutes after the hour 0-59
phungductung 0:e87aa4c49e95 156 tm_hour hours since midnight 0-23
phungductung 0:e87aa4c49e95 157 tm_mday day of the month 1-31
phungductung 0:e87aa4c49e95 158 tm_mon months since January 0-11
phungductung 0:e87aa4c49e95 159 tm_year years since 1900
phungductung 0:e87aa4c49e95 160 tm_wday days since Sunday 0-6
phungductung 0:e87aa4c49e95 161 tm_yday days since January 1 0-365
phungductung 0:e87aa4c49e95 162 tm_isdst Daylight Saving Time flag
phungductung 0:e87aa4c49e95 163 */
phungductung 0:e87aa4c49e95 164 time_t rtc_read(void)
phungductung 0:e87aa4c49e95 165 {
phungductung 0:e87aa4c49e95 166 RTC_DateTypeDef dateStruct;
phungductung 0:e87aa4c49e95 167 RTC_TimeTypeDef timeStruct;
phungductung 0:e87aa4c49e95 168 struct tm timeinfo;
phungductung 0:e87aa4c49e95 169
phungductung 0:e87aa4c49e95 170 RtcHandle.Instance = RTC;
phungductung 0:e87aa4c49e95 171
phungductung 0:e87aa4c49e95 172 // Read actual date and time
phungductung 0:e87aa4c49e95 173 // Warning: the time must be read first!
phungductung 0:e87aa4c49e95 174 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
phungductung 0:e87aa4c49e95 175 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
phungductung 0:e87aa4c49e95 176
phungductung 0:e87aa4c49e95 177 // Setup a tm structure based on the RTC
phungductung 0:e87aa4c49e95 178 timeinfo.tm_wday = dateStruct.WeekDay;
phungductung 0:e87aa4c49e95 179 timeinfo.tm_mon = dateStruct.Month - 1;
phungductung 0:e87aa4c49e95 180 timeinfo.tm_mday = dateStruct.Date;
phungductung 0:e87aa4c49e95 181 timeinfo.tm_year = dateStruct.Year + 100;
phungductung 0:e87aa4c49e95 182 timeinfo.tm_hour = timeStruct.Hours;
phungductung 0:e87aa4c49e95 183 timeinfo.tm_min = timeStruct.Minutes;
phungductung 0:e87aa4c49e95 184 timeinfo.tm_sec = timeStruct.Seconds;
phungductung 0:e87aa4c49e95 185
phungductung 0:e87aa4c49e95 186 // Convert to timestamp
phungductung 0:e87aa4c49e95 187 time_t t = mktime(&timeinfo);
phungductung 0:e87aa4c49e95 188
phungductung 0:e87aa4c49e95 189 return t;
phungductung 0:e87aa4c49e95 190 }
phungductung 0:e87aa4c49e95 191
phungductung 0:e87aa4c49e95 192 void rtc_write(time_t t)
phungductung 0:e87aa4c49e95 193 {
phungductung 0:e87aa4c49e95 194 RTC_DateTypeDef dateStruct;
phungductung 0:e87aa4c49e95 195 RTC_TimeTypeDef timeStruct;
phungductung 0:e87aa4c49e95 196
phungductung 0:e87aa4c49e95 197 RtcHandle.Instance = RTC;
phungductung 0:e87aa4c49e95 198
phungductung 0:e87aa4c49e95 199 // Enable write access to Backup domain
phungductung 0:e87aa4c49e95 200 HAL_PWR_EnableBkUpAccess();
phungductung 0:e87aa4c49e95 201
phungductung 0:e87aa4c49e95 202 // Convert the time into a tm
phungductung 0:e87aa4c49e95 203 struct tm *timeinfo = localtime(&t);
phungductung 0:e87aa4c49e95 204
phungductung 0:e87aa4c49e95 205 // Fill RTC structures
phungductung 0:e87aa4c49e95 206 dateStruct.WeekDay = timeinfo->tm_wday;
phungductung 0:e87aa4c49e95 207 dateStruct.Month = timeinfo->tm_mon + 1;
phungductung 0:e87aa4c49e95 208 dateStruct.Date = timeinfo->tm_mday;
phungductung 0:e87aa4c49e95 209 dateStruct.Year = timeinfo->tm_year - 100;
phungductung 0:e87aa4c49e95 210 timeStruct.Hours = timeinfo->tm_hour;
phungductung 0:e87aa4c49e95 211 timeStruct.Minutes = timeinfo->tm_min;
phungductung 0:e87aa4c49e95 212 timeStruct.Seconds = timeinfo->tm_sec;
phungductung 0:e87aa4c49e95 213 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
phungductung 0:e87aa4c49e95 214 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
phungductung 0:e87aa4c49e95 215 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
phungductung 0:e87aa4c49e95 216
phungductung 0:e87aa4c49e95 217 // Change the RTC current date/time
phungductung 0:e87aa4c49e95 218 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
phungductung 0:e87aa4c49e95 219 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
phungductung 0:e87aa4c49e95 220 }
phungductung 0:e87aa4c49e95 221
phungductung 0:e87aa4c49e95 222 #endif