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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_NUCLEO_F072RB/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:
404:cbc7dfcb0ce9 
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 219:993c9b0acbcc 1 /* mbed Microcontroller Library
mbed_official 219:993c9b0acbcc 2 *******************************************************************************
mbed_official 219:993c9b0acbcc 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 219:993c9b0acbcc 4 * All rights reserved.
mbed_official 219:993c9b0acbcc 5 *
mbed_official 219:993c9b0acbcc 6 * Redistribution and use in source and binary forms, with or without
mbed_official 219:993c9b0acbcc 7 * modification, are permitted provided that the following conditions are met:
mbed_official 219:993c9b0acbcc 8 *
mbed_official 219:993c9b0acbcc 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 219:993c9b0acbcc 10 * this list of conditions and the following disclaimer.
mbed_official 219:993c9b0acbcc 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 219:993c9b0acbcc 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 219:993c9b0acbcc 13 * and/or other materials provided with the distribution.
mbed_official 219:993c9b0acbcc 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 219:993c9b0acbcc 15 * may be used to endorse or promote products derived from this software
mbed_official 219:993c9b0acbcc 16 * without specific prior written permission.
mbed_official 219:993c9b0acbcc 17 *
mbed_official 219:993c9b0acbcc 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 219:993c9b0acbcc 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 219:993c9b0acbcc 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 219:993c9b0acbcc 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 219:993c9b0acbcc 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 219:993c9b0acbcc 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 219:993c9b0acbcc 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 219:993c9b0acbcc 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 219:993c9b0acbcc 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 219:993c9b0acbcc 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 219:993c9b0acbcc 28 *******************************************************************************
mbed_official 219:993c9b0acbcc 29 */
mbed_official 219:993c9b0acbcc 30 #include "rtc_api.h"
mbed_official 219:993c9b0acbcc 31
mbed_official 219:993c9b0acbcc 32 #if DEVICE_RTC
mbed_official 219:993c9b0acbcc 33
mbed_official 285:31249416b6f9 34 #include "mbed_error.h"
mbed_official 219:993c9b0acbcc 35
mbed_official 219:993c9b0acbcc 36 static int rtc_inited = 0;
mbed_official 219:993c9b0acbcc 37
mbed_official 219:993c9b0acbcc 38 static RTC_HandleTypeDef RtcHandle;
mbed_official 219:993c9b0acbcc 39
mbed_official 402:09075a3b15e3 40 void rtc_init(void)
mbed_official 402:09075a3b15e3 41 {
mbed_official 219:993c9b0acbcc 42 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 219:993c9b0acbcc 43 uint32_t rtc_freq = 0;
mbed_official 219:993c9b0acbcc 44
mbed_official 219:993c9b0acbcc 45 if (rtc_inited) return;
mbed_official 219:993c9b0acbcc 46 rtc_inited = 1;
mbed_official 219:993c9b0acbcc 47
mbed_official 219:993c9b0acbcc 48 RtcHandle.Instance = RTC;
mbed_official 219:993c9b0acbcc 49
mbed_official 219:993c9b0acbcc 50 // Enable Power clock
mbed_official 219:993c9b0acbcc 51 __PWR_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 52
mbed_official 219:993c9b0acbcc 53 // Enable access to Backup domain
mbed_official 219:993c9b0acbcc 54 HAL_PWR_EnableBkUpAccess();
mbed_official 219:993c9b0acbcc 55
mbed_official 219:993c9b0acbcc 56 // Reset Backup domain
mbed_official 219:993c9b0acbcc 57 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 219:993c9b0acbcc 58 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 219:993c9b0acbcc 59
mbed_official 219:993c9b0acbcc 60 // Enable LSE Oscillator
mbed_official 219:993c9b0acbcc 61 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 404:cbc7dfcb0ce9 62 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 404:cbc7dfcb0ce9 63 RCC_OscInitStruct.LSEState = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT
mbed_official 219:993c9b0acbcc 64 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 219:993c9b0acbcc 65 // Connect LSE to RTC
mbed_official 219:993c9b0acbcc 66 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 219:993c9b0acbcc 67 rtc_freq = LSE_VALUE;
mbed_official 219:993c9b0acbcc 68 } else {
mbed_official 219:993c9b0acbcc 69 // Enable LSI clock
mbed_official 219:993c9b0acbcc 70 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 219:993c9b0acbcc 71 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 219:993c9b0acbcc 72 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 219:993c9b0acbcc 73 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 219:993c9b0acbcc 74 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 219:993c9b0acbcc 75 error("RTC error: LSI clock initialization failed.");
mbed_official 219:993c9b0acbcc 76 }
mbed_official 219:993c9b0acbcc 77 // Connect LSI to RTC
mbed_official 219:993c9b0acbcc 78 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 404:cbc7dfcb0ce9 79 // This value is LSI typical value. To be measured precisely using a timer input capture for example.
mbed_official 404:cbc7dfcb0ce9 80 rtc_freq = LSI_VALUE;
mbed_official 219:993c9b0acbcc 81 }
mbed_official 219:993c9b0acbcc 82
mbed_official 219:993c9b0acbcc 83 // Enable RTC
mbed_official 219:993c9b0acbcc 84 __HAL_RCC_RTC_ENABLE();
mbed_official 219:993c9b0acbcc 85
mbed_official 219:993c9b0acbcc 86 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 219:993c9b0acbcc 87 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 219:993c9b0acbcc 88 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
mbed_official 219:993c9b0acbcc 89 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 219:993c9b0acbcc 90 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 219:993c9b0acbcc 91 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 219:993c9b0acbcc 92
mbed_official 219:993c9b0acbcc 93 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 219:993c9b0acbcc 94 error("RTC error: RTC initialization failed.");
mbed_official 219:993c9b0acbcc 95 }
mbed_official 219:993c9b0acbcc 96 }
mbed_official 219:993c9b0acbcc 97
mbed_official 402:09075a3b15e3 98 void rtc_free(void)
mbed_official 402:09075a3b15e3 99 {
mbed_official 219:993c9b0acbcc 100 // Enable Power clock
mbed_official 219:993c9b0acbcc 101 __PWR_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 102
mbed_official 219:993c9b0acbcc 103 // Enable access to Backup domain
mbed_official 219:993c9b0acbcc 104 HAL_PWR_EnableBkUpAccess();
mbed_official 219:993c9b0acbcc 105
mbed_official 219:993c9b0acbcc 106 // Reset Backup domain
mbed_official 219:993c9b0acbcc 107 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 219:993c9b0acbcc 108 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 219:993c9b0acbcc 109
mbed_official 219:993c9b0acbcc 110 // Disable access to Backup domain
mbed_official 219:993c9b0acbcc 111 HAL_PWR_DisableBkUpAccess();
mbed_official 219:993c9b0acbcc 112
mbed_official 219:993c9b0acbcc 113 // Disable LSI and LSE clocks
mbed_official 219:993c9b0acbcc 114 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 219:993c9b0acbcc 115 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 219:993c9b0acbcc 116 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 219:993c9b0acbcc 117 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 219:993c9b0acbcc 118 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 219:993c9b0acbcc 119 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 219:993c9b0acbcc 120
mbed_official 219:993c9b0acbcc 121 rtc_inited = 0;
mbed_official 219:993c9b0acbcc 122 }
mbed_official 219:993c9b0acbcc 123
mbed_official 402:09075a3b15e3 124 int rtc_isenabled(void)
mbed_official 402:09075a3b15e3 125 {
mbed_official 219:993c9b0acbcc 126 return rtc_inited;
mbed_official 219:993c9b0acbcc 127 }
mbed_official 219:993c9b0acbcc 128
mbed_official 219:993c9b0acbcc 129 /*
mbed_official 219:993c9b0acbcc 130 RTC Registers
mbed_official 219:993c9b0acbcc 131 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 219:993c9b0acbcc 132 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 219:993c9b0acbcc 133 RTC_Date day of the month 1-31
mbed_official 219:993c9b0acbcc 134 RTC_Year year 0-99
mbed_official 219:993c9b0acbcc 135 struct tm
mbed_official 219:993c9b0acbcc 136 tm_sec seconds after the minute 0-61
mbed_official 219:993c9b0acbcc 137 tm_min minutes after the hour 0-59
mbed_official 219:993c9b0acbcc 138 tm_hour hours since midnight 0-23
mbed_official 219:993c9b0acbcc 139 tm_mday day of the month 1-31
mbed_official 219:993c9b0acbcc 140 tm_mon months since January 0-11
mbed_official 219:993c9b0acbcc 141 tm_year years since 1900
mbed_official 219:993c9b0acbcc 142 tm_wday days since Sunday 0-6
mbed_official 219:993c9b0acbcc 143 tm_yday days since January 1 0-365
mbed_official 219:993c9b0acbcc 144 tm_isdst Daylight Saving Time flag
mbed_official 219:993c9b0acbcc 145 */
mbed_official 402:09075a3b15e3 146 time_t rtc_read(void)
mbed_official 402:09075a3b15e3 147 {
mbed_official 219:993c9b0acbcc 148 RTC_DateTypeDef dateStruct;
mbed_official 219:993c9b0acbcc 149 RTC_TimeTypeDef timeStruct;
mbed_official 219:993c9b0acbcc 150 struct tm timeinfo;
mbed_official 219:993c9b0acbcc 151
mbed_official 219:993c9b0acbcc 152 RtcHandle.Instance = RTC;
mbed_official 219:993c9b0acbcc 153
mbed_official 219:993c9b0acbcc 154 // Read actual date and time
mbed_official 219:993c9b0acbcc 155 // Warning: the time must be read first!
mbed_official 219:993c9b0acbcc 156 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 157 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 158
mbed_official 219:993c9b0acbcc 159 // Setup a tm structure based on the RTC
mbed_official 219:993c9b0acbcc 160 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 219:993c9b0acbcc 161 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 219:993c9b0acbcc 162 timeinfo.tm_mday = dateStruct.Date;
mbed_official 219:993c9b0acbcc 163 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 219:993c9b0acbcc 164 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 219:993c9b0acbcc 165 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 219:993c9b0acbcc 166 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 219:993c9b0acbcc 167
mbed_official 219:993c9b0acbcc 168 // Convert to timestamp
mbed_official 219:993c9b0acbcc 169 time_t t = mktime(&timeinfo);
mbed_official 219:993c9b0acbcc 170
mbed_official 219:993c9b0acbcc 171 return t;
mbed_official 219:993c9b0acbcc 172 }
mbed_official 219:993c9b0acbcc 173
mbed_official 402:09075a3b15e3 174 void rtc_write(time_t t)
mbed_official 402:09075a3b15e3 175 {
mbed_official 219:993c9b0acbcc 176 RTC_DateTypeDef dateStruct;
mbed_official 219:993c9b0acbcc 177 RTC_TimeTypeDef timeStruct;
mbed_official 219:993c9b0acbcc 178
mbed_official 219:993c9b0acbcc 179 RtcHandle.Instance = RTC;
mbed_official 219:993c9b0acbcc 180
mbed_official 219:993c9b0acbcc 181 // Convert the time into a tm
mbed_official 219:993c9b0acbcc 182 struct tm *timeinfo = localtime(&t);
mbed_official 219:993c9b0acbcc 183
mbed_official 219:993c9b0acbcc 184 // Fill RTC structures
mbed_official 219:993c9b0acbcc 185 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 219:993c9b0acbcc 186 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 219:993c9b0acbcc 187 dateStruct.Date = timeinfo->tm_mday;
mbed_official 219:993c9b0acbcc 188 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 219:993c9b0acbcc 189 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 219:993c9b0acbcc 190 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 219:993c9b0acbcc 191 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 219:993c9b0acbcc 192 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 219:993c9b0acbcc 193 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 219:993c9b0acbcc 194 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 219:993c9b0acbcc 195
mbed_official 219:993c9b0acbcc 196 // Change the RTC current date/time
mbed_official 219:993c9b0acbcc 197 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 198 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 199 }
mbed_official 219:993c9b0acbcc 200
mbed_official 219:993c9b0acbcc 201 #endif