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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

Import librarymbed

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_STM32F1/rtc_api.c@621:9c82b0f79f3d, 2015-09-11 (annotated)

Committer:
mbed_official
Date:
Fri Sep 11 09:30:09 2015 +0100
Revision:
621:9c82b0f79f3d
Parent:
508:4f5903e025e6 
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538



Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/



ignore target files not supported by the yotta module

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 60:142c6c6f5949 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 *******************************************************************************
mbed_official 70:c1fbde68b492 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 4 * All rights reserved.
mbed_official 60:142c6c6f5949 5 *
mbed_official 70:c1fbde68b492 6 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 7 * modification, are permitted provided that the following conditions are met:
mbed_official 60:142c6c6f5949 8 *
mbed_official 70:c1fbde68b492 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 10 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 13 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 15 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 16 * without specific prior written permission.
mbed_official 60:142c6c6f5949 17 *
mbed_official 70:c1fbde68b492 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 70:c1fbde68b492 28 *******************************************************************************
mbed_official 60:142c6c6f5949 29 */
mbed_official 60:142c6c6f5949 30 #include "rtc_api.h"
mbed_official 60:142c6c6f5949 31
mbed_official 174:8bb9f3a33240 32 #if DEVICE_RTC
mbed_official 174:8bb9f3a33240 33
mbed_official 489:119543c9f674 34 #include "mbed_error.h"
mbed_official 174:8bb9f3a33240 35
mbed_official 60:142c6c6f5949 36 static int rtc_inited = 0;
mbed_official 60:142c6c6f5949 37
mbed_official 489:119543c9f674 38 static RTC_HandleTypeDef RtcHandle;
mbed_official 489:119543c9f674 39
mbed_official 402:09075a3b15e3 40 void rtc_init(void)
mbed_official 402:09075a3b15e3 41 {
mbed_official 489:119543c9f674 42 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 174:8bb9f3a33240 43
mbed_official 489:119543c9f674 44 if (rtc_inited) return;
mbed_official 489:119543c9f674 45 rtc_inited = 1;
mbed_official 489:119543c9f674 46
mbed_official 489:119543c9f674 47 RtcHandle.Instance = RTC;
mbed_official 60:142c6c6f5949 48
mbed_official 489:119543c9f674 49 // Enable Power clock
mbed_official 489:119543c9f674 50 __HAL_RCC_PWR_CLK_ENABLE();
mbed_official 174:8bb9f3a33240 51
mbed_official 489:119543c9f674 52 // Enable access to Backup domain
mbed_official 489:119543c9f674 53 HAL_PWR_EnableBkUpAccess();
mbed_official 174:8bb9f3a33240 54
mbed_official 489:119543c9f674 55 // Reset Backup domain
mbed_official 489:119543c9f674 56 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 489:119543c9f674 57 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 174:8bb9f3a33240 58
mbed_official 489:119543c9f674 59 // Enable LSE Oscillator
mbed_official 489:119543c9f674 60 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 489:119543c9f674 61 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 489:119543c9f674 62 RCC_OscInitStruct.LSEState = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT
mbed_official 489:119543c9f674 63 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 489:119543c9f674 64 // Connect LSE to RTC
mbed_official 489:119543c9f674 65 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 174:8bb9f3a33240 66 } else {
mbed_official 489:119543c9f674 67 // Enable LSI clock
mbed_official 489:119543c9f674 68 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 489:119543c9f674 69 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 489:119543c9f674 70 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 489:119543c9f674 71 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 489:119543c9f674 72 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 489:119543c9f674 73 error("RTC error: LSI clock initialization failed.");
mbed_official 489:119543c9f674 74 }
mbed_official 489:119543c9f674 75 // Connect LSI to RTC
mbed_official 489:119543c9f674 76 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 174:8bb9f3a33240 77 }
mbed_official 174:8bb9f3a33240 78
mbed_official 489:119543c9f674 79 // Enable RTC
mbed_official 489:119543c9f674 80 __HAL_RCC_RTC_ENABLE();
mbed_official 60:142c6c6f5949 81
mbed_official 489:119543c9f674 82 RtcHandle.Init.AsynchPrediv = RTC_AUTO_1_SECOND;
mbed_official 174:8bb9f3a33240 83
mbed_official 489:119543c9f674 84 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 489:119543c9f674 85 error("RTC error: RTC initialization failed.");
mbed_official 489:119543c9f674 86 }
mbed_official 60:142c6c6f5949 87 }
mbed_official 60:142c6c6f5949 88
mbed_official 402:09075a3b15e3 89 void rtc_free(void)
mbed_official 402:09075a3b15e3 90 {
mbed_official 489:119543c9f674 91 // Enable Power clock
mbed_official 489:119543c9f674 92 __PWR_CLK_ENABLE();
mbed_official 489:119543c9f674 93
mbed_official 489:119543c9f674 94 // Enable access to Backup domain
mbed_official 489:119543c9f674 95 HAL_PWR_EnableBkUpAccess();
mbed_official 489:119543c9f674 96
mbed_official 489:119543c9f674 97 // Reset Backup domain
mbed_official 489:119543c9f674 98 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 489:119543c9f674 99 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 489:119543c9f674 100
mbed_official 489:119543c9f674 101 // Disable access to Backup domain
mbed_official 489:119543c9f674 102 HAL_PWR_DisableBkUpAccess();
mbed_official 489:119543c9f674 103
mbed_official 489:119543c9f674 104 // Disable LSI and LSE clocks
mbed_official 489:119543c9f674 105 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 489:119543c9f674 106 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 489:119543c9f674 107 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 489:119543c9f674 108 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 489:119543c9f674 109 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 489:119543c9f674 110 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 215:83cf97a28428 111
mbed_official 60:142c6c6f5949 112 rtc_inited = 0;
mbed_official 60:142c6c6f5949 113 }
mbed_official 60:142c6c6f5949 114
mbed_official 402:09075a3b15e3 115 int rtc_isenabled(void)
mbed_official 402:09075a3b15e3 116 {
mbed_official 60:142c6c6f5949 117 return rtc_inited;
mbed_official 60:142c6c6f5949 118 }
mbed_official 60:142c6c6f5949 119
mbed_official 489:119543c9f674 120 /*
mbed_official 489:119543c9f674 121 RTC Registers
mbed_official 489:119543c9f674 122 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 489:119543c9f674 123 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 489:119543c9f674 124 RTC_Date day of the month 1-31
mbed_official 489:119543c9f674 125 RTC_Year year 0-99
mbed_official 489:119543c9f674 126 struct tm
mbed_official 489:119543c9f674 127 tm_sec seconds after the minute 0-61
mbed_official 489:119543c9f674 128 tm_min minutes after the hour 0-59
mbed_official 489:119543c9f674 129 tm_hour hours since midnight 0-23
mbed_official 489:119543c9f674 130 tm_mday day of the month 1-31
mbed_official 489:119543c9f674 131 tm_mon months since January 0-11
mbed_official 489:119543c9f674 132 tm_year years since 1900
mbed_official 489:119543c9f674 133 tm_wday days since Sunday 0-6
mbed_official 489:119543c9f674 134 tm_yday days since January 1 0-365
mbed_official 489:119543c9f674 135 tm_isdst Daylight Saving Time flag
mbed_official 489:119543c9f674 136 */
mbed_official 402:09075a3b15e3 137 time_t rtc_read(void)
mbed_official 402:09075a3b15e3 138 {
mbed_official 489:119543c9f674 139 RTC_DateTypeDef dateStruct;
mbed_official 489:119543c9f674 140 RTC_TimeTypeDef timeStruct;
mbed_official 489:119543c9f674 141 struct tm timeinfo;
mbed_official 489:119543c9f674 142
mbed_official 489:119543c9f674 143 RtcHandle.Instance = RTC;
mbed_official 489:119543c9f674 144
mbed_official 489:119543c9f674 145 // Read actual date and time
mbed_official 489:119543c9f674 146 // Warning: the time must be read first!
mbed_official 489:119543c9f674 147 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 489:119543c9f674 148 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 489:119543c9f674 149
mbed_official 489:119543c9f674 150 // Setup a tm structure based on the RTC
mbed_official 489:119543c9f674 151 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 489:119543c9f674 152 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 489:119543c9f674 153 timeinfo.tm_mday = dateStruct.Date;
mbed_official 489:119543c9f674 154 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 489:119543c9f674 155 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 489:119543c9f674 156 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 489:119543c9f674 157 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 489:119543c9f674 158
mbed_official 489:119543c9f674 159 // Convert to timestamp
mbed_official 489:119543c9f674 160 time_t t = mktime(&timeinfo);
mbed_official 489:119543c9f674 161
mbed_official 489:119543c9f674 162 return t;
mbed_official 60:142c6c6f5949 163 }
mbed_official 60:142c6c6f5949 164
mbed_official 402:09075a3b15e3 165 void rtc_write(time_t t)
mbed_official 402:09075a3b15e3 166 {
mbed_official 489:119543c9f674 167 RTC_DateTypeDef dateStruct;
mbed_official 489:119543c9f674 168 RTC_TimeTypeDef timeStruct;
mbed_official 489:119543c9f674 169
mbed_official 489:119543c9f674 170 RtcHandle.Instance = RTC;
mbed_official 489:119543c9f674 171
mbed_official 489:119543c9f674 172 // Convert the time into a tm
mbed_official 489:119543c9f674 173 struct tm *timeinfo = localtime(&t);
mbed_official 489:119543c9f674 174
mbed_official 489:119543c9f674 175 // Fill RTC structures
mbed_official 489:119543c9f674 176 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 489:119543c9f674 177 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 489:119543c9f674 178 dateStruct.Date = timeinfo->tm_mday;
mbed_official 489:119543c9f674 179 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 489:119543c9f674 180 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 489:119543c9f674 181 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 489:119543c9f674 182 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 489:119543c9f674 183
mbed_official 489:119543c9f674 184 // Change the RTC current date/time
mbed_official 489:119543c9f674 185 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 489:119543c9f674 186 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 60:142c6c6f5949 187 }
mbed_official 174:8bb9f3a33240 188
mbed_official 174:8bb9f3a33240 189 #endif