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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_NUCLEO_F072RB/rtc_api.c@251:de9a1e4ffd79, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 14:15:07 2014 +0100
Revision:
251:de9a1e4ffd79
Parent:
250:a49055e7a707
Child:
285:31249416b6f9
Synchronized with git revision b0ac1e3485a9aa1cb98d1ca68df9d1cdbcd6ce63



Full URL: https://github.com/mbedmicro/mbed/commit/b0ac1e3485a9aa1cb98d1ca68df9d1cdbcd6ce63/



Revert "error.h -> mbed_error.h"

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 251:de9a1e4ffd79 34 #include "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 219:993c9b0acbcc 40 void rtc_init(void) {
mbed_official 219:993c9b0acbcc 41 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 219:993c9b0acbcc 42 uint32_t rtc_freq = 0;
mbed_official 219:993c9b0acbcc 43
mbed_official 219:993c9b0acbcc 44 if (rtc_inited) return;
mbed_official 219:993c9b0acbcc 45 rtc_inited = 1;
mbed_official 219:993c9b0acbcc 46
mbed_official 219:993c9b0acbcc 47 RtcHandle.Instance = RTC;
mbed_official 219:993c9b0acbcc 48
mbed_official 219:993c9b0acbcc 49 // Enable Power clock
mbed_official 219:993c9b0acbcc 50 __PWR_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 51
mbed_official 219:993c9b0acbcc 52 // Enable access to Backup domain
mbed_official 219:993c9b0acbcc 53 HAL_PWR_EnableBkUpAccess();
mbed_official 219:993c9b0acbcc 54
mbed_official 219:993c9b0acbcc 55 // Reset Backup domain
mbed_official 219:993c9b0acbcc 56 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 219:993c9b0acbcc 57 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 219:993c9b0acbcc 58
mbed_official 219:993c9b0acbcc 59 // Enable LSE Oscillator
mbed_official 219:993c9b0acbcc 60 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 219:993c9b0acbcc 61 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; /* Mandatory, otherwise the PLL is reconfigured! */
mbed_official 219:993c9b0acbcc 62 RCC_OscInitStruct.LSEState = RCC_LSE_ON; /* External 32.768 kHz clock on OSC_IN/OSC_OUT */
mbed_official 219:993c9b0acbcc 63 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 219:993c9b0acbcc 64 // Connect LSE to RTC
mbed_official 219:993c9b0acbcc 65 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 219:993c9b0acbcc 66 rtc_freq = LSE_VALUE;
mbed_official 219:993c9b0acbcc 67 } else {
mbed_official 219:993c9b0acbcc 68 // Enable LSI clock
mbed_official 219:993c9b0acbcc 69 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 219:993c9b0acbcc 70 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 219:993c9b0acbcc 71 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 219:993c9b0acbcc 72 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 219:993c9b0acbcc 73 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 219:993c9b0acbcc 74 error("RTC error: LSI clock initialization failed.");
mbed_official 219:993c9b0acbcc 75 }
mbed_official 219:993c9b0acbcc 76 // Connect LSI to RTC
mbed_official 219:993c9b0acbcc 77 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 219:993c9b0acbcc 78 // [TODO] This value is LSI typical value. To be measured precisely using a timer input capture.
mbed_official 219:993c9b0acbcc 79 rtc_freq = 32000;
mbed_official 219:993c9b0acbcc 80 }
mbed_official 219:993c9b0acbcc 81
mbed_official 219:993c9b0acbcc 82 // Enable RTC
mbed_official 219:993c9b0acbcc 83 __HAL_RCC_RTC_ENABLE();
mbed_official 219:993c9b0acbcc 84
mbed_official 219:993c9b0acbcc 85 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 219:993c9b0acbcc 86 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 219:993c9b0acbcc 87 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
mbed_official 219:993c9b0acbcc 88 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 219:993c9b0acbcc 89 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 219:993c9b0acbcc 90 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 219:993c9b0acbcc 91
mbed_official 219:993c9b0acbcc 92 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 219:993c9b0acbcc 93 error("RTC error: RTC initialization failed.");
mbed_official 219:993c9b0acbcc 94 }
mbed_official 219:993c9b0acbcc 95 }
mbed_official 219:993c9b0acbcc 96
mbed_official 219:993c9b0acbcc 97 void rtc_free(void) {
mbed_official 219:993c9b0acbcc 98 // Enable Power clock
mbed_official 219:993c9b0acbcc 99 __PWR_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 100
mbed_official 219:993c9b0acbcc 101 // Enable access to Backup domain
mbed_official 219:993c9b0acbcc 102 HAL_PWR_EnableBkUpAccess();
mbed_official 219:993c9b0acbcc 103
mbed_official 219:993c9b0acbcc 104 // Reset Backup domain
mbed_official 219:993c9b0acbcc 105 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 219:993c9b0acbcc 106 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 219:993c9b0acbcc 107
mbed_official 219:993c9b0acbcc 108 // Disable access to Backup domain
mbed_official 219:993c9b0acbcc 109 HAL_PWR_DisableBkUpAccess();
mbed_official 219:993c9b0acbcc 110
mbed_official 219:993c9b0acbcc 111 // Disable LSI and LSE clocks
mbed_official 219:993c9b0acbcc 112 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 219:993c9b0acbcc 113 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 219:993c9b0acbcc 114 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 219:993c9b0acbcc 115 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 219:993c9b0acbcc 116 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 219:993c9b0acbcc 117 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 219:993c9b0acbcc 118
mbed_official 219:993c9b0acbcc 119 rtc_inited = 0;
mbed_official 219:993c9b0acbcc 120 }
mbed_official 219:993c9b0acbcc 121
mbed_official 219:993c9b0acbcc 122 int rtc_isenabled(void) {
mbed_official 219:993c9b0acbcc 123 return rtc_inited;
mbed_official 219:993c9b0acbcc 124 }
mbed_official 219:993c9b0acbcc 125
mbed_official 219:993c9b0acbcc 126 /*
mbed_official 219:993c9b0acbcc 127 RTC Registers
mbed_official 219:993c9b0acbcc 128 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 219:993c9b0acbcc 129 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 219:993c9b0acbcc 130 RTC_Date day of the month 1-31
mbed_official 219:993c9b0acbcc 131 RTC_Year year 0-99
mbed_official 219:993c9b0acbcc 132 struct tm
mbed_official 219:993c9b0acbcc 133 tm_sec seconds after the minute 0-61
mbed_official 219:993c9b0acbcc 134 tm_min minutes after the hour 0-59
mbed_official 219:993c9b0acbcc 135 tm_hour hours since midnight 0-23
mbed_official 219:993c9b0acbcc 136 tm_mday day of the month 1-31
mbed_official 219:993c9b0acbcc 137 tm_mon months since January 0-11
mbed_official 219:993c9b0acbcc 138 tm_year years since 1900
mbed_official 219:993c9b0acbcc 139 tm_wday days since Sunday 0-6
mbed_official 219:993c9b0acbcc 140 tm_yday days since January 1 0-365
mbed_official 219:993c9b0acbcc 141 tm_isdst Daylight Saving Time flag
mbed_official 219:993c9b0acbcc 142 */
mbed_official 219:993c9b0acbcc 143 time_t rtc_read(void) {
mbed_official 219:993c9b0acbcc 144 RTC_DateTypeDef dateStruct;
mbed_official 219:993c9b0acbcc 145 RTC_TimeTypeDef timeStruct;
mbed_official 219:993c9b0acbcc 146 struct tm timeinfo;
mbed_official 219:993c9b0acbcc 147
mbed_official 219:993c9b0acbcc 148 RtcHandle.Instance = RTC;
mbed_official 219:993c9b0acbcc 149
mbed_official 219:993c9b0acbcc 150 // Read actual date and time
mbed_official 219:993c9b0acbcc 151 // Warning: the time must be read first!
mbed_official 219:993c9b0acbcc 152 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 153 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 154
mbed_official 219:993c9b0acbcc 155 // Setup a tm structure based on the RTC
mbed_official 219:993c9b0acbcc 156 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 219:993c9b0acbcc 157 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 219:993c9b0acbcc 158 timeinfo.tm_mday = dateStruct.Date;
mbed_official 219:993c9b0acbcc 159 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 219:993c9b0acbcc 160 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 219:993c9b0acbcc 161 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 219:993c9b0acbcc 162 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 219:993c9b0acbcc 163
mbed_official 219:993c9b0acbcc 164 // Convert to timestamp
mbed_official 219:993c9b0acbcc 165 time_t t = mktime(&timeinfo);
mbed_official 219:993c9b0acbcc 166
mbed_official 219:993c9b0acbcc 167 return t;
mbed_official 219:993c9b0acbcc 168 }
mbed_official 219:993c9b0acbcc 169
mbed_official 219:993c9b0acbcc 170 void rtc_write(time_t t) {
mbed_official 219:993c9b0acbcc 171 RTC_DateTypeDef dateStruct;
mbed_official 219:993c9b0acbcc 172 RTC_TimeTypeDef timeStruct;
mbed_official 219:993c9b0acbcc 173
mbed_official 219:993c9b0acbcc 174 RtcHandle.Instance = RTC;
mbed_official 219:993c9b0acbcc 175
mbed_official 219:993c9b0acbcc 176 // Convert the time into a tm
mbed_official 219:993c9b0acbcc 177 struct tm *timeinfo = localtime(&t);
mbed_official 219:993c9b0acbcc 178
mbed_official 219:993c9b0acbcc 179 // Fill RTC structures
mbed_official 219:993c9b0acbcc 180 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 219:993c9b0acbcc 181 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 219:993c9b0acbcc 182 dateStruct.Date = timeinfo->tm_mday;
mbed_official 219:993c9b0acbcc 183 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 219:993c9b0acbcc 184 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 219:993c9b0acbcc 185 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 219:993c9b0acbcc 186 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 219:993c9b0acbcc 187 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 219:993c9b0acbcc 188 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 219:993c9b0acbcc 189 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 219:993c9b0acbcc 190
mbed_official 219:993c9b0acbcc 191 // Change the RTC current date/time
mbed_official 219:993c9b0acbcc 192 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 193 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 194 }
mbed_official 219:993c9b0acbcc 195
mbed_official 219:993c9b0acbcc 196 #endif