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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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_DISCO_F334C8/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:
381:5460fc57b6e4 
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 381:5460fc57b6e4 1 /* mbed Microcontroller Library
mbed_official 381:5460fc57b6e4 2 *******************************************************************************
mbed_official 381:5460fc57b6e4 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 381:5460fc57b6e4 4 * All rights reserved.
mbed_official 381:5460fc57b6e4 5 *
mbed_official 381:5460fc57b6e4 6 * Redistribution and use in source and binary forms, with or without
mbed_official 381:5460fc57b6e4 7 * modification, are permitted provided that the following conditions are met:
mbed_official 381:5460fc57b6e4 8 *
mbed_official 381:5460fc57b6e4 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 381:5460fc57b6e4 10 * this list of conditions and the following disclaimer.
mbed_official 381:5460fc57b6e4 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 381:5460fc57b6e4 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 381:5460fc57b6e4 13 * and/or other materials provided with the distribution.
mbed_official 381:5460fc57b6e4 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 381:5460fc57b6e4 15 * may be used to endorse or promote products derived from this software
mbed_official 381:5460fc57b6e4 16 * without specific prior written permission.
mbed_official 381:5460fc57b6e4 17 *
mbed_official 381:5460fc57b6e4 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 381:5460fc57b6e4 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 381:5460fc57b6e4 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 381:5460fc57b6e4 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 381:5460fc57b6e4 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 381:5460fc57b6e4 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 381:5460fc57b6e4 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 381:5460fc57b6e4 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 381:5460fc57b6e4 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 381:5460fc57b6e4 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 381:5460fc57b6e4 28 *******************************************************************************
mbed_official 381:5460fc57b6e4 29 */
mbed_official 381:5460fc57b6e4 30 #include "rtc_api.h"
mbed_official 381:5460fc57b6e4 31
mbed_official 381:5460fc57b6e4 32 #if DEVICE_RTC
mbed_official 381:5460fc57b6e4 33
mbed_official 381:5460fc57b6e4 34 #include "mbed_error.h"
mbed_official 381:5460fc57b6e4 35
mbed_official 381:5460fc57b6e4 36 static int rtc_inited = 0;
mbed_official 381:5460fc57b6e4 37
mbed_official 381:5460fc57b6e4 38 static RTC_HandleTypeDef RtcHandle;
mbed_official 381:5460fc57b6e4 39
mbed_official 381:5460fc57b6e4 40 void rtc_init(void)
mbed_official 381:5460fc57b6e4 41 {
mbed_official 381:5460fc57b6e4 42 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 381:5460fc57b6e4 43 uint32_t rtc_freq = 0;
mbed_official 381:5460fc57b6e4 44
mbed_official 381:5460fc57b6e4 45 if (rtc_inited) return;
mbed_official 381:5460fc57b6e4 46 rtc_inited = 1;
mbed_official 381:5460fc57b6e4 47
mbed_official 381:5460fc57b6e4 48 RtcHandle.Instance = RTC;
mbed_official 381:5460fc57b6e4 49
mbed_official 381:5460fc57b6e4 50 // Enable Power clock
mbed_official 381:5460fc57b6e4 51 __PWR_CLK_ENABLE();
mbed_official 381:5460fc57b6e4 52
mbed_official 381:5460fc57b6e4 53 // Enable access to Backup domain
mbed_official 381:5460fc57b6e4 54 HAL_PWR_EnableBkUpAccess();
mbed_official 381:5460fc57b6e4 55
mbed_official 381:5460fc57b6e4 56 // Reset Backup domain
mbed_official 381:5460fc57b6e4 57 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 381:5460fc57b6e4 58 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 381:5460fc57b6e4 59
mbed_official 381:5460fc57b6e4 60 // Enable LSE Oscillator
mbed_official 381:5460fc57b6e4 61 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 381:5460fc57b6e4 62 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; /* Mandatory, otherwise the PLL is reconfigured! */
mbed_official 381:5460fc57b6e4 63 RCC_OscInitStruct.LSEState = RCC_LSE_ON; /* External 32.768 kHz clock on OSC_IN/OSC_OUT */
mbed_official 381:5460fc57b6e4 64 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 381:5460fc57b6e4 65 // Connect LSE to RTC
mbed_official 381:5460fc57b6e4 66 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 381:5460fc57b6e4 67 rtc_freq = LSE_VALUE;
mbed_official 381:5460fc57b6e4 68 } else {
mbed_official 381:5460fc57b6e4 69 // Enable LSI clock
mbed_official 381:5460fc57b6e4 70 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 381:5460fc57b6e4 71 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 381:5460fc57b6e4 72 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 381:5460fc57b6e4 73 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 381:5460fc57b6e4 74 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 381:5460fc57b6e4 75 error("RTC error: LSI clock initialization failed.");
mbed_official 381:5460fc57b6e4 76 }
mbed_official 381:5460fc57b6e4 77 // Connect LSI to RTC
mbed_official 381:5460fc57b6e4 78 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 381:5460fc57b6e4 79 // Note: The LSI clock can be measured precisely using a timer input capture.
mbed_official 381:5460fc57b6e4 80 rtc_freq = LSI_VALUE;
mbed_official 381:5460fc57b6e4 81 }
mbed_official 381:5460fc57b6e4 82
mbed_official 381:5460fc57b6e4 83 // Enable RTC
mbed_official 381:5460fc57b6e4 84 __HAL_RCC_RTC_ENABLE();
mbed_official 381:5460fc57b6e4 85
mbed_official 381:5460fc57b6e4 86 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 381:5460fc57b6e4 87 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 381:5460fc57b6e4 88 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
mbed_official 381:5460fc57b6e4 89 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 381:5460fc57b6e4 90 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 381:5460fc57b6e4 91 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 381:5460fc57b6e4 92
mbed_official 381:5460fc57b6e4 93 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 381:5460fc57b6e4 94 error("RTC error: RTC initialization failed.");
mbed_official 381:5460fc57b6e4 95 }
mbed_official 381:5460fc57b6e4 96 }
mbed_official 381:5460fc57b6e4 97
mbed_official 381:5460fc57b6e4 98 void rtc_free(void)
mbed_official 381:5460fc57b6e4 99 {
mbed_official 381:5460fc57b6e4 100 // Enable Power clock
mbed_official 381:5460fc57b6e4 101 __PWR_CLK_ENABLE();
mbed_official 381:5460fc57b6e4 102
mbed_official 381:5460fc57b6e4 103 // Enable access to Backup domain
mbed_official 381:5460fc57b6e4 104 HAL_PWR_EnableBkUpAccess();
mbed_official 381:5460fc57b6e4 105
mbed_official 381:5460fc57b6e4 106 // Reset Backup domain
mbed_official 381:5460fc57b6e4 107 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 381:5460fc57b6e4 108 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 381:5460fc57b6e4 109
mbed_official 381:5460fc57b6e4 110 // Disable access to Backup domain
mbed_official 381:5460fc57b6e4 111 HAL_PWR_DisableBkUpAccess();
mbed_official 381:5460fc57b6e4 112
mbed_official 381:5460fc57b6e4 113 // Disable LSI and LSE clocks
mbed_official 381:5460fc57b6e4 114 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 381:5460fc57b6e4 115 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 381:5460fc57b6e4 116 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 381:5460fc57b6e4 117 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 381:5460fc57b6e4 118 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 381:5460fc57b6e4 119 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 381:5460fc57b6e4 120
mbed_official 381:5460fc57b6e4 121 rtc_inited = 0;
mbed_official 381:5460fc57b6e4 122 }
mbed_official 381:5460fc57b6e4 123
mbed_official 381:5460fc57b6e4 124 int rtc_isenabled(void)
mbed_official 381:5460fc57b6e4 125 {
mbed_official 381:5460fc57b6e4 126 return rtc_inited;
mbed_official 381:5460fc57b6e4 127 }
mbed_official 381:5460fc57b6e4 128
mbed_official 381:5460fc57b6e4 129 /*
mbed_official 381:5460fc57b6e4 130 RTC Registers
mbed_official 381:5460fc57b6e4 131 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 381:5460fc57b6e4 132 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 381:5460fc57b6e4 133 RTC_Date day of the month 1-31
mbed_official 381:5460fc57b6e4 134 RTC_Year year 0-99
mbed_official 381:5460fc57b6e4 135 struct tm
mbed_official 381:5460fc57b6e4 136 tm_sec seconds after the minute 0-61
mbed_official 381:5460fc57b6e4 137 tm_min minutes after the hour 0-59
mbed_official 381:5460fc57b6e4 138 tm_hour hours since midnight 0-23
mbed_official 381:5460fc57b6e4 139 tm_mday day of the month 1-31
mbed_official 381:5460fc57b6e4 140 tm_mon months since January 0-11
mbed_official 381:5460fc57b6e4 141 tm_year years since 1900
mbed_official 381:5460fc57b6e4 142 tm_wday days since Sunday 0-6
mbed_official 381:5460fc57b6e4 143 tm_yday days since January 1 0-365
mbed_official 381:5460fc57b6e4 144 tm_isdst Daylight Saving Time flag
mbed_official 381:5460fc57b6e4 145 */
mbed_official 381:5460fc57b6e4 146 time_t rtc_read(void)
mbed_official 381:5460fc57b6e4 147 {
mbed_official 381:5460fc57b6e4 148 RTC_DateTypeDef dateStruct;
mbed_official 381:5460fc57b6e4 149 RTC_TimeTypeDef timeStruct;
mbed_official 381:5460fc57b6e4 150 struct tm timeinfo;
mbed_official 381:5460fc57b6e4 151
mbed_official 381:5460fc57b6e4 152 RtcHandle.Instance = RTC;
mbed_official 381:5460fc57b6e4 153
mbed_official 381:5460fc57b6e4 154 // Read actual date and time
mbed_official 381:5460fc57b6e4 155 // Warning: the time must be read first!
mbed_official 381:5460fc57b6e4 156 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 381:5460fc57b6e4 157 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 381:5460fc57b6e4 158
mbed_official 381:5460fc57b6e4 159 // Setup a tm structure based on the RTC
mbed_official 381:5460fc57b6e4 160 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 381:5460fc57b6e4 161 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 381:5460fc57b6e4 162 timeinfo.tm_mday = dateStruct.Date;
mbed_official 381:5460fc57b6e4 163 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 381:5460fc57b6e4 164 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 381:5460fc57b6e4 165 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 381:5460fc57b6e4 166 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 381:5460fc57b6e4 167
mbed_official 381:5460fc57b6e4 168 // Convert to timestamp
mbed_official 381:5460fc57b6e4 169 time_t t = mktime(&timeinfo);
mbed_official 381:5460fc57b6e4 170
mbed_official 381:5460fc57b6e4 171 return t;
mbed_official 381:5460fc57b6e4 172 }
mbed_official 381:5460fc57b6e4 173
mbed_official 381:5460fc57b6e4 174 void rtc_write(time_t t)
mbed_official 381:5460fc57b6e4 175 {
mbed_official 381:5460fc57b6e4 176 RTC_DateTypeDef dateStruct;
mbed_official 381:5460fc57b6e4 177 RTC_TimeTypeDef timeStruct;
mbed_official 381:5460fc57b6e4 178
mbed_official 381:5460fc57b6e4 179 RtcHandle.Instance = RTC;
mbed_official 381:5460fc57b6e4 180
mbed_official 381:5460fc57b6e4 181 // Convert the time into a tm
mbed_official 381:5460fc57b6e4 182 struct tm *timeinfo = localtime(&t);
mbed_official 381:5460fc57b6e4 183
mbed_official 381:5460fc57b6e4 184 // Fill RTC structures
mbed_official 381:5460fc57b6e4 185 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 381:5460fc57b6e4 186 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 381:5460fc57b6e4 187 dateStruct.Date = timeinfo->tm_mday;
mbed_official 381:5460fc57b6e4 188 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 381:5460fc57b6e4 189 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 381:5460fc57b6e4 190 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 381:5460fc57b6e4 191 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 381:5460fc57b6e4 192 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 381:5460fc57b6e4 193 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 381:5460fc57b6e4 194 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 381:5460fc57b6e4 195
mbed_official 381:5460fc57b6e4 196 // Change the RTC current date/time
mbed_official 381:5460fc57b6e4 197 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 381:5460fc57b6e4 198 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 381:5460fc57b6e4 199 }
mbed_official 381:5460fc57b6e4 200
mbed_official 381:5460fc57b6e4 201 #endif