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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_L053R8/rtc_api.c@268:402bcc0c870b, 2014-07-29 (annotated)

Committer:
mbed_official
Date:
Tue Jul 29 19:00:07 2014 +0100
Revision:
268:402bcc0c870b
Parent:
251:de9a1e4ffd79
Child:
285:31249416b6f9
Synchronized with git revision 490d1a6606b3138f165c5edf2f2370ca616587c0



Full URL: https://github.com/mbedmicro/mbed/commit/490d1a6606b3138f165c5edf2f2370ca616587c0/



[LPC1114] Sleep fix + some device.h settings

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 4 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 5 *
mbed_official 181:a4cbdfbbd2f4 6 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 7 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 8 *
mbed_official 181:a4cbdfbbd2f4 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 10 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 13 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 15 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 16 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 17 *
mbed_official 181:a4cbdfbbd2f4 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 28 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 29 */
mbed_official 181:a4cbdfbbd2f4 30 #include "rtc_api.h"
mbed_official 181:a4cbdfbbd2f4 31
mbed_official 181:a4cbdfbbd2f4 32 #if DEVICE_RTC
mbed_official 181:a4cbdfbbd2f4 33
mbed_official 251:de9a1e4ffd79 34 #include "error.h"
mbed_official 181:a4cbdfbbd2f4 35
mbed_official 181:a4cbdfbbd2f4 36 static int rtc_inited = 0;
mbed_official 181:a4cbdfbbd2f4 37
mbed_official 181:a4cbdfbbd2f4 38 static RTC_HandleTypeDef RtcHandle;
mbed_official 181:a4cbdfbbd2f4 39
mbed_official 181:a4cbdfbbd2f4 40 void rtc_init(void) {
mbed_official 181:a4cbdfbbd2f4 41 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 181:a4cbdfbbd2f4 42 uint32_t rtc_freq = 0;
mbed_official 181:a4cbdfbbd2f4 43
mbed_official 181:a4cbdfbbd2f4 44 if (rtc_inited) return;
mbed_official 181:a4cbdfbbd2f4 45 rtc_inited = 1;
mbed_official 181:a4cbdfbbd2f4 46
mbed_official 181:a4cbdfbbd2f4 47 RtcHandle.Instance = RTC;
mbed_official 181:a4cbdfbbd2f4 48
mbed_official 181:a4cbdfbbd2f4 49 // Enable Power clock
mbed_official 181:a4cbdfbbd2f4 50 __PWR_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 51
mbed_official 181:a4cbdfbbd2f4 52 // Enable access to Backup domain
mbed_official 181:a4cbdfbbd2f4 53 HAL_PWR_EnableBkUpAccess();
mbed_official 181:a4cbdfbbd2f4 54
mbed_official 181:a4cbdfbbd2f4 55 // Reset Backup domain
mbed_official 181:a4cbdfbbd2f4 56 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 181:a4cbdfbbd2f4 57 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 181:a4cbdfbbd2f4 58
mbed_official 181:a4cbdfbbd2f4 59 // Enable LSE Oscillator
mbed_official 181:a4cbdfbbd2f4 60 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 181:a4cbdfbbd2f4 61 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; /* Mandatory, otherwise the PLL is reconfigured! */
mbed_official 181:a4cbdfbbd2f4 62 RCC_OscInitStruct.LSEState = RCC_LSE_ON; /* External 32.768 kHz clock on OSC_IN/OSC_OUT */
mbed_official 181:a4cbdfbbd2f4 63 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 181:a4cbdfbbd2f4 64 // Connect LSE to RTC
mbed_official 181:a4cbdfbbd2f4 65 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE);
mbed_official 181:a4cbdfbbd2f4 66 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 181:a4cbdfbbd2f4 67 rtc_freq = LSE_VALUE;
mbed_official 181:a4cbdfbbd2f4 68 } else {
mbed_official 181:a4cbdfbbd2f4 69 // Enable LSI clock
mbed_official 181:a4cbdfbbd2f4 70 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 181:a4cbdfbbd2f4 71 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 181:a4cbdfbbd2f4 72 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 181:a4cbdfbbd2f4 73 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 181:a4cbdfbbd2f4 74 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 181:a4cbdfbbd2f4 75 error("RTC error: LSI clock initialization failed.");
mbed_official 181:a4cbdfbbd2f4 76 }
mbed_official 181:a4cbdfbbd2f4 77 // Connect LSI to RTC
mbed_official 181:a4cbdfbbd2f4 78 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
mbed_official 181:a4cbdfbbd2f4 79 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 181:a4cbdfbbd2f4 80 // [TODO] This value is LSI typical value. To be measured precisely using a timer input capture
mbed_official 181:a4cbdfbbd2f4 81 rtc_freq = 32000;
mbed_official 181:a4cbdfbbd2f4 82 }
mbed_official 181:a4cbdfbbd2f4 83
mbed_official 181:a4cbdfbbd2f4 84 // Enable RTC
mbed_official 181:a4cbdfbbd2f4 85 __HAL_RCC_RTC_ENABLE();
mbed_official 181:a4cbdfbbd2f4 86
mbed_official 181:a4cbdfbbd2f4 87 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 181:a4cbdfbbd2f4 88 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 181:a4cbdfbbd2f4 89 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
mbed_official 181:a4cbdfbbd2f4 90 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 181:a4cbdfbbd2f4 91 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 181:a4cbdfbbd2f4 92 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 181:a4cbdfbbd2f4 93
mbed_official 181:a4cbdfbbd2f4 94 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 181:a4cbdfbbd2f4 95 error("RTC error: RTC initialization failed.");
mbed_official 181:a4cbdfbbd2f4 96 }
mbed_official 181:a4cbdfbbd2f4 97 }
mbed_official 181:a4cbdfbbd2f4 98
mbed_official 181:a4cbdfbbd2f4 99 void rtc_free(void) {
mbed_official 181:a4cbdfbbd2f4 100 // Enable Power clock
mbed_official 181:a4cbdfbbd2f4 101 __PWR_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 102
mbed_official 181:a4cbdfbbd2f4 103 // Enable access to Backup domain
mbed_official 181:a4cbdfbbd2f4 104 HAL_PWR_EnableBkUpAccess();
mbed_official 181:a4cbdfbbd2f4 105
mbed_official 181:a4cbdfbbd2f4 106 // Reset Backup domain
mbed_official 181:a4cbdfbbd2f4 107 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 181:a4cbdfbbd2f4 108 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 181:a4cbdfbbd2f4 109
mbed_official 181:a4cbdfbbd2f4 110 // Disable access to Backup domain
mbed_official 181:a4cbdfbbd2f4 111 HAL_PWR_DisableBkUpAccess();
mbed_official 181:a4cbdfbbd2f4 112
mbed_official 181:a4cbdfbbd2f4 113 // Disable LSI and LSE clocks
mbed_official 181:a4cbdfbbd2f4 114 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 181:a4cbdfbbd2f4 115 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 181:a4cbdfbbd2f4 116 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 181:a4cbdfbbd2f4 117 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 181:a4cbdfbbd2f4 118 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 181:a4cbdfbbd2f4 119 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 181:a4cbdfbbd2f4 120
mbed_official 181:a4cbdfbbd2f4 121 rtc_inited = 0;
mbed_official 181:a4cbdfbbd2f4 122 }
mbed_official 181:a4cbdfbbd2f4 123
mbed_official 181:a4cbdfbbd2f4 124 int rtc_isenabled(void) {
mbed_official 181:a4cbdfbbd2f4 125 return rtc_inited;
mbed_official 181:a4cbdfbbd2f4 126 }
mbed_official 181:a4cbdfbbd2f4 127
mbed_official 181:a4cbdfbbd2f4 128 /*
mbed_official 181:a4cbdfbbd2f4 129 RTC Registers
mbed_official 181:a4cbdfbbd2f4 130 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 181:a4cbdfbbd2f4 131 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 181:a4cbdfbbd2f4 132 RTC_Date day of the month 1-31
mbed_official 181:a4cbdfbbd2f4 133 RTC_Year year 0-99
mbed_official 181:a4cbdfbbd2f4 134 struct tm
mbed_official 181:a4cbdfbbd2f4 135 tm_sec seconds after the minute 0-61
mbed_official 181:a4cbdfbbd2f4 136 tm_min minutes after the hour 0-59
mbed_official 181:a4cbdfbbd2f4 137 tm_hour hours since midnight 0-23
mbed_official 181:a4cbdfbbd2f4 138 tm_mday day of the month 1-31
mbed_official 181:a4cbdfbbd2f4 139 tm_mon months since January 0-11
mbed_official 181:a4cbdfbbd2f4 140 tm_year years since 1900
mbed_official 181:a4cbdfbbd2f4 141 tm_wday days since Sunday 0-6
mbed_official 181:a4cbdfbbd2f4 142 tm_yday days since January 1 0-365
mbed_official 181:a4cbdfbbd2f4 143 tm_isdst Daylight Saving Time flag
mbed_official 181:a4cbdfbbd2f4 144 */
mbed_official 181:a4cbdfbbd2f4 145 time_t rtc_read(void) {
mbed_official 181:a4cbdfbbd2f4 146 RTC_DateTypeDef dateStruct;
mbed_official 181:a4cbdfbbd2f4 147 RTC_TimeTypeDef timeStruct;
mbed_official 181:a4cbdfbbd2f4 148 struct tm timeinfo;
mbed_official 181:a4cbdfbbd2f4 149
mbed_official 181:a4cbdfbbd2f4 150 RtcHandle.Instance = RTC;
mbed_official 181:a4cbdfbbd2f4 151
mbed_official 181:a4cbdfbbd2f4 152 // Read actual date and time
mbed_official 181:a4cbdfbbd2f4 153 // Warning: the time must be read first!
mbed_official 181:a4cbdfbbd2f4 154 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 181:a4cbdfbbd2f4 155 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 181:a4cbdfbbd2f4 156
mbed_official 181:a4cbdfbbd2f4 157 // Setup a tm structure based on the RTC
mbed_official 181:a4cbdfbbd2f4 158 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 181:a4cbdfbbd2f4 159 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 181:a4cbdfbbd2f4 160 timeinfo.tm_mday = dateStruct.Date;
mbed_official 181:a4cbdfbbd2f4 161 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 181:a4cbdfbbd2f4 162 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 181:a4cbdfbbd2f4 163 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 181:a4cbdfbbd2f4 164 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 181:a4cbdfbbd2f4 165
mbed_official 181:a4cbdfbbd2f4 166 // Convert to timestamp
mbed_official 181:a4cbdfbbd2f4 167 time_t t = mktime(&timeinfo);
mbed_official 181:a4cbdfbbd2f4 168
mbed_official 181:a4cbdfbbd2f4 169 return t;
mbed_official 181:a4cbdfbbd2f4 170 }
mbed_official 181:a4cbdfbbd2f4 171
mbed_official 181:a4cbdfbbd2f4 172 void rtc_write(time_t t) {
mbed_official 181:a4cbdfbbd2f4 173 RTC_DateTypeDef dateStruct;
mbed_official 181:a4cbdfbbd2f4 174 RTC_TimeTypeDef timeStruct;
mbed_official 181:a4cbdfbbd2f4 175
mbed_official 181:a4cbdfbbd2f4 176 RtcHandle.Instance = RTC;
mbed_official 181:a4cbdfbbd2f4 177
mbed_official 181:a4cbdfbbd2f4 178 // Convert the time into a tm
mbed_official 181:a4cbdfbbd2f4 179 struct tm *timeinfo = localtime(&t);
mbed_official 181:a4cbdfbbd2f4 180
mbed_official 181:a4cbdfbbd2f4 181 // Fill RTC structures
mbed_official 181:a4cbdfbbd2f4 182 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 181:a4cbdfbbd2f4 183 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 181:a4cbdfbbd2f4 184 dateStruct.Date = timeinfo->tm_mday;
mbed_official 181:a4cbdfbbd2f4 185 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 181:a4cbdfbbd2f4 186 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 181:a4cbdfbbd2f4 187 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 181:a4cbdfbbd2f4 188 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 181:a4cbdfbbd2f4 189 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 181:a4cbdfbbd2f4 190 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 181:a4cbdfbbd2f4 191 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 181:a4cbdfbbd2f4 192
mbed_official 181:a4cbdfbbd2f4 193 // Change the RTC current date/time
mbed_official 181:a4cbdfbbd2f4 194 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 181:a4cbdfbbd2f4 195 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 181:a4cbdfbbd2f4 196 }
mbed_official 181:a4cbdfbbd2f4 197
mbed_official 181:a4cbdfbbd2f4 198 #endif