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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_STM32F407VG/rtc_api.c@440:8a0b45cd594f, 2014-12-16 (annotated)

Committer:
mbed_official
Date:
Tue Dec 16 08:15:08 2014 +0000
Revision:
440:8a0b45cd594f
Parent:
296:ec1b66a3d094 
Synchronized with git revision 67fbbf0b635d0c0d93fbe433306c537c2ad206aa



Full URL: https://github.com/mbedmicro/mbed/commit/67fbbf0b635d0c0d93fbe433306c537c2ad206aa/



Targets: nrf51 - updating app_timer.c from Norid'c SDKv7.1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 133:d4dda5c437f0 1 /* mbed Microcontroller Library
mbed_official 133:d4dda5c437f0 2 *******************************************************************************
mbed_official 133:d4dda5c437f0 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 133:d4dda5c437f0 4 * All rights reserved.
mbed_official 133:d4dda5c437f0 5 *
mbed_official 133:d4dda5c437f0 6 * Redistribution and use in source and binary forms, with or without
mbed_official 133:d4dda5c437f0 7 * modification, are permitted provided that the following conditions are met:
mbed_official 133:d4dda5c437f0 8 *
mbed_official 133:d4dda5c437f0 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 133:d4dda5c437f0 10 * this list of conditions and the following disclaimer.
mbed_official 133:d4dda5c437f0 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 133:d4dda5c437f0 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 133:d4dda5c437f0 13 * and/or other materials provided with the distribution.
mbed_official 133:d4dda5c437f0 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 133:d4dda5c437f0 15 * may be used to endorse or promote products derived from this software
mbed_official 133:d4dda5c437f0 16 * without specific prior written permission.
mbed_official 133:d4dda5c437f0 17 *
mbed_official 133:d4dda5c437f0 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 133:d4dda5c437f0 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 133:d4dda5c437f0 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 133:d4dda5c437f0 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 133:d4dda5c437f0 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 133:d4dda5c437f0 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 133:d4dda5c437f0 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 133:d4dda5c437f0 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 133:d4dda5c437f0 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 133:d4dda5c437f0 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 133:d4dda5c437f0 28 *******************************************************************************
mbed_official 133:d4dda5c437f0 29 */
mbed_official 133:d4dda5c437f0 30 #include "rtc_api.h"
mbed_official 242:7074e42da0b2 31
mbed_official 242:7074e42da0b2 32 #if DEVICE_RTC
mbed_official 285:31249416b6f9 33 #include "mbed_error.h"
mbed_official 133:d4dda5c437f0 34
mbed_official 133:d4dda5c437f0 35 static int rtc_inited = 0;
mbed_official 133:d4dda5c437f0 36
mbed_official 133:d4dda5c437f0 37 static RTC_HandleTypeDef RtcHandle;
mbed_official 133:d4dda5c437f0 38
mbed_official 133:d4dda5c437f0 39 void rtc_init(void) {
mbed_official 242:7074e42da0b2 40 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 242:7074e42da0b2 41 uint32_t rtc_freq = 0;
mbed_official 242:7074e42da0b2 42
mbed_official 133:d4dda5c437f0 43 if (rtc_inited) return;
mbed_official 133:d4dda5c437f0 44 rtc_inited = 1;
mbed_official 133:d4dda5c437f0 45
mbed_official 133:d4dda5c437f0 46 RtcHandle.Instance = RTC;
mbed_official 133:d4dda5c437f0 47
mbed_official 133:d4dda5c437f0 48 // Enable Power clock
mbed_official 133:d4dda5c437f0 49 __PWR_CLK_ENABLE();
mbed_official 133:d4dda5c437f0 50
mbed_official 242:7074e42da0b2 51 // Enable access to Backup domain
mbed_official 133:d4dda5c437f0 52 HAL_PWR_EnableBkUpAccess();
mbed_official 133:d4dda5c437f0 53
mbed_official 133:d4dda5c437f0 54 // Reset Backup domain
mbed_official 133:d4dda5c437f0 55 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 133:d4dda5c437f0 56 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 133:d4dda5c437f0 57
mbed_official 242:7074e42da0b2 58 // Enable LSE Oscillator
mbed_official 242:7074e42da0b2 59 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 242:7074e42da0b2 60 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; /* Mandatory, otherwise the PLL is reconfigured! */
mbed_official 242:7074e42da0b2 61 RCC_OscInitStruct.LSEState = RCC_LSE_ON; /* External 32.768 kHz clock on OSC_IN/OSC_OUT */
mbed_official 242:7074e42da0b2 62 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 242:7074e42da0b2 63 // Connect LSE to RTC
mbed_official 242:7074e42da0b2 64 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE);
mbed_official 242:7074e42da0b2 65 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 242:7074e42da0b2 66 rtc_freq = LSE_VALUE;
mbed_official 242:7074e42da0b2 67 } else {
mbed_official 133:d4dda5c437f0 68 // Enable LSI clock
mbed_official 133:d4dda5c437f0 69 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 242:7074e42da0b2 70 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 133:d4dda5c437f0 71 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 242:7074e42da0b2 72 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 133:d4dda5c437f0 73 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 133:d4dda5c437f0 74 error("RTC error: LSI clock initialization failed.");
mbed_official 133:d4dda5c437f0 75 }
mbed_official 133:d4dda5c437f0 76 // Connect LSI to RTC
mbed_official 133:d4dda5c437f0 77 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
mbed_official 133:d4dda5c437f0 78 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 242:7074e42da0b2 79 // [TODO] This value is LSI typical value. To be measured precisely using a timer input capture
mbed_official 242:7074e42da0b2 80 rtc_freq = 32000;
mbed_official 242:7074e42da0b2 81 }
mbed_official 133:d4dda5c437f0 82
mbed_official 242:7074e42da0b2 83 // Enable RTC
mbed_official 133:d4dda5c437f0 84 __HAL_RCC_RTC_ENABLE();
mbed_official 133:d4dda5c437f0 85
mbed_official 133:d4dda5c437f0 86 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 133:d4dda5c437f0 87 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 242:7074e42da0b2 88 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
mbed_official 133:d4dda5c437f0 89 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 133:d4dda5c437f0 90 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 133:d4dda5c437f0 91 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 133:d4dda5c437f0 92 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 133:d4dda5c437f0 93 error("RTC error: RTC initialization failed.");
mbed_official 133:d4dda5c437f0 94 }
mbed_official 133:d4dda5c437f0 95 }
mbed_official 133:d4dda5c437f0 96
mbed_official 133:d4dda5c437f0 97 void rtc_free(void) {
mbed_official 133:d4dda5c437f0 98 // Enable Power clock
mbed_official 133:d4dda5c437f0 99 __PWR_CLK_ENABLE();
mbed_official 133:d4dda5c437f0 100
mbed_official 242:7074e42da0b2 101 // Enable access to Backup domain
mbed_official 133:d4dda5c437f0 102 HAL_PWR_EnableBkUpAccess();
mbed_official 133:d4dda5c437f0 103
mbed_official 133:d4dda5c437f0 104 // Reset Backup domain
mbed_official 133:d4dda5c437f0 105 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 133:d4dda5c437f0 106 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 133:d4dda5c437f0 107
mbed_official 242:7074e42da0b2 108 // Disable access to Backup domain
mbed_official 242:7074e42da0b2 109 HAL_PWR_DisableBkUpAccess();
mbed_official 242:7074e42da0b2 110
mbed_official 242:7074e42da0b2 111 // Disable LSI and LSE clocks
mbed_official 133:d4dda5c437f0 112 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 242:7074e42da0b2 113 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 133:d4dda5c437f0 114 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 133:d4dda5c437f0 115 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 242:7074e42da0b2 116 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 133:d4dda5c437f0 117 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 133:d4dda5c437f0 118
mbed_official 133:d4dda5c437f0 119 rtc_inited = 0;
mbed_official 133:d4dda5c437f0 120 }
mbed_official 133:d4dda5c437f0 121
mbed_official 133:d4dda5c437f0 122 int rtc_isenabled(void) {
mbed_official 133:d4dda5c437f0 123 return rtc_inited;
mbed_official 133:d4dda5c437f0 124 }
mbed_official 133:d4dda5c437f0 125
mbed_official 133:d4dda5c437f0 126 /*
mbed_official 133:d4dda5c437f0 127 RTC Registers
mbed_official 133:d4dda5c437f0 128 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 133:d4dda5c437f0 129 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 133:d4dda5c437f0 130 RTC_Date day of the month 1-31
mbed_official 133:d4dda5c437f0 131 RTC_Year year 0-99
mbed_official 133:d4dda5c437f0 132 struct tm
mbed_official 133:d4dda5c437f0 133 tm_sec seconds after the minute 0-61
mbed_official 133:d4dda5c437f0 134 tm_min minutes after the hour 0-59
mbed_official 133:d4dda5c437f0 135 tm_hour hours since midnight 0-23
mbed_official 133:d4dda5c437f0 136 tm_mday day of the month 1-31
mbed_official 133:d4dda5c437f0 137 tm_mon months since January 0-11
mbed_official 133:d4dda5c437f0 138 tm_year years since 1900
mbed_official 133:d4dda5c437f0 139 tm_wday days since Sunday 0-6
mbed_official 133:d4dda5c437f0 140 tm_yday days since January 1 0-365
mbed_official 133:d4dda5c437f0 141 tm_isdst Daylight Saving Time flag
mbed_official 133:d4dda5c437f0 142 */
mbed_official 133:d4dda5c437f0 143 time_t rtc_read(void) {
mbed_official 133:d4dda5c437f0 144 RTC_DateTypeDef dateStruct;
mbed_official 133:d4dda5c437f0 145 RTC_TimeTypeDef timeStruct;
mbed_official 133:d4dda5c437f0 146 struct tm timeinfo;
mbed_official 133:d4dda5c437f0 147
mbed_official 133:d4dda5c437f0 148 RtcHandle.Instance = RTC;
mbed_official 133:d4dda5c437f0 149
mbed_official 133:d4dda5c437f0 150 // Read actual date and time
mbed_official 133:d4dda5c437f0 151 // Warning: the time must be read first!
mbed_official 133:d4dda5c437f0 152 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 133:d4dda5c437f0 153 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 133:d4dda5c437f0 154
mbed_official 133:d4dda5c437f0 155 // Setup a tm structure based on the RTC
mbed_official 133:d4dda5c437f0 156 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 133:d4dda5c437f0 157 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 133:d4dda5c437f0 158 timeinfo.tm_mday = dateStruct.Date;
mbed_official 133:d4dda5c437f0 159 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 133:d4dda5c437f0 160 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 133:d4dda5c437f0 161 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 133:d4dda5c437f0 162 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 133:d4dda5c437f0 163
mbed_official 133:d4dda5c437f0 164 // Convert to timestamp
mbed_official 133:d4dda5c437f0 165 time_t t = mktime(&timeinfo);
mbed_official 133:d4dda5c437f0 166
mbed_official 133:d4dda5c437f0 167 return t;
mbed_official 133:d4dda5c437f0 168 }
mbed_official 133:d4dda5c437f0 169
mbed_official 133:d4dda5c437f0 170 void rtc_write(time_t t) {
mbed_official 133:d4dda5c437f0 171 RTC_DateTypeDef dateStruct;
mbed_official 133:d4dda5c437f0 172 RTC_TimeTypeDef timeStruct;
mbed_official 133:d4dda5c437f0 173
mbed_official 133:d4dda5c437f0 174 RtcHandle.Instance = RTC;
mbed_official 133:d4dda5c437f0 175
mbed_official 133:d4dda5c437f0 176 // Convert the time into a tm
mbed_official 133:d4dda5c437f0 177 struct tm *timeinfo = localtime(&t);
mbed_official 133:d4dda5c437f0 178
mbed_official 133:d4dda5c437f0 179 // Fill RTC structures
mbed_official 133:d4dda5c437f0 180 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 133:d4dda5c437f0 181 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 133:d4dda5c437f0 182 dateStruct.Date = timeinfo->tm_mday;
mbed_official 133:d4dda5c437f0 183 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 133:d4dda5c437f0 184 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 133:d4dda5c437f0 185 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 133:d4dda5c437f0 186 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 133:d4dda5c437f0 187 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 133:d4dda5c437f0 188 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 133:d4dda5c437f0 189 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 133:d4dda5c437f0 190
mbed_official 133:d4dda5c437f0 191 // Change the RTC current date/time
mbed_official 133:d4dda5c437f0 192 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 133:d4dda5c437f0 193 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 133:d4dda5c437f0 194 }
mbed_official 242:7074e42da0b2 195
mbed_official 242:7074e42da0b2 196 #endif