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targets/hal/TARGET_STM/TARGET_MTS_MDOT_F405RG/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:
400:7fa56b1b9d45 
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 400:7fa56b1b9d45 1 /* mbed Microcontroller Library
mbed_official 400:7fa56b1b9d45 2 *******************************************************************************
mbed_official 400:7fa56b1b9d45 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 400:7fa56b1b9d45 4 * All rights reserved.
mbed_official 400:7fa56b1b9d45 5 *
mbed_official 400:7fa56b1b9d45 6 * Redistribution and use in source and binary forms, with or without
mbed_official 400:7fa56b1b9d45 7 * modification, are permitted provided that the following conditions are met:
mbed_official 400:7fa56b1b9d45 8 *
mbed_official 400:7fa56b1b9d45 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 400:7fa56b1b9d45 10 * this list of conditions and the following disclaimer.
mbed_official 400:7fa56b1b9d45 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 400:7fa56b1b9d45 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 400:7fa56b1b9d45 13 * and/or other materials provided with the distribution.
mbed_official 400:7fa56b1b9d45 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 400:7fa56b1b9d45 15 * may be used to endorse or promote products derived from this software
mbed_official 400:7fa56b1b9d45 16 * without specific prior written permission.
mbed_official 400:7fa56b1b9d45 17 *
mbed_official 400:7fa56b1b9d45 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 400:7fa56b1b9d45 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 400:7fa56b1b9d45 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 400:7fa56b1b9d45 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 400:7fa56b1b9d45 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 400:7fa56b1b9d45 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 400:7fa56b1b9d45 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 400:7fa56b1b9d45 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 400:7fa56b1b9d45 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 400:7fa56b1b9d45 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 400:7fa56b1b9d45 28 *******************************************************************************
mbed_official 400:7fa56b1b9d45 29 */
mbed_official 400:7fa56b1b9d45 30 #include "rtc_api.h"
mbed_official 400:7fa56b1b9d45 31
mbed_official 400:7fa56b1b9d45 32 #if DEVICE_RTC
mbed_official 400:7fa56b1b9d45 33
mbed_official 400:7fa56b1b9d45 34 #include "mbed_error.h"
mbed_official 400:7fa56b1b9d45 35
mbed_official 400:7fa56b1b9d45 36 static int rtc_inited = 0;
mbed_official 400:7fa56b1b9d45 37
mbed_official 400:7fa56b1b9d45 38 static RTC_HandleTypeDef RtcHandle;
mbed_official 400:7fa56b1b9d45 39
mbed_official 400:7fa56b1b9d45 40 void rtc_init(void) {
mbed_official 400:7fa56b1b9d45 41 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 400:7fa56b1b9d45 42 uint32_t rtc_freq = 0;
mbed_official 400:7fa56b1b9d45 43
mbed_official 400:7fa56b1b9d45 44 if (rtc_inited) return;
mbed_official 400:7fa56b1b9d45 45 rtc_inited = 1;
mbed_official 400:7fa56b1b9d45 46
mbed_official 400:7fa56b1b9d45 47 RtcHandle.Instance = RTC;
mbed_official 400:7fa56b1b9d45 48
mbed_official 400:7fa56b1b9d45 49 // Enable Power clock
mbed_official 400:7fa56b1b9d45 50 __PWR_CLK_ENABLE();
mbed_official 400:7fa56b1b9d45 51
mbed_official 400:7fa56b1b9d45 52 // Enable access to Backup domain
mbed_official 400:7fa56b1b9d45 53 HAL_PWR_EnableBkUpAccess();
mbed_official 400:7fa56b1b9d45 54
mbed_official 400:7fa56b1b9d45 55 // Reset Backup domain
mbed_official 400:7fa56b1b9d45 56 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 400:7fa56b1b9d45 57 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 400:7fa56b1b9d45 58
mbed_official 400:7fa56b1b9d45 59 // Enable LSE Oscillator
mbed_official 400:7fa56b1b9d45 60 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 400:7fa56b1b9d45 61 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; /* Mandatory, otherwise the PLL is reconfigured! */
mbed_official 400:7fa56b1b9d45 62 RCC_OscInitStruct.LSEState = RCC_LSE_ON; /* External 32.768 kHz clock on OSC_IN/OSC_OUT */
mbed_official 400:7fa56b1b9d45 63 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 400:7fa56b1b9d45 64 // Connect LSE to RTC
mbed_official 400:7fa56b1b9d45 65 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE);
mbed_official 400:7fa56b1b9d45 66 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 400:7fa56b1b9d45 67 rtc_freq = LSE_VALUE;
mbed_official 400:7fa56b1b9d45 68 } else {
mbed_official 400:7fa56b1b9d45 69 // Enable LSI clock
mbed_official 400:7fa56b1b9d45 70 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 400:7fa56b1b9d45 71 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 400:7fa56b1b9d45 72 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 400:7fa56b1b9d45 73 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 400:7fa56b1b9d45 74 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 400:7fa56b1b9d45 75 error("RTC error: LSI clock initialization failed.");
mbed_official 400:7fa56b1b9d45 76 }
mbed_official 400:7fa56b1b9d45 77 // Connect LSI to RTC
mbed_official 400:7fa56b1b9d45 78 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
mbed_official 400:7fa56b1b9d45 79 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 400:7fa56b1b9d45 80 // [TODO] This value is LSI typical value. To be measured precisely using a timer input capture
mbed_official 400:7fa56b1b9d45 81 rtc_freq = 32000;
mbed_official 400:7fa56b1b9d45 82 }
mbed_official 400:7fa56b1b9d45 83
mbed_official 400:7fa56b1b9d45 84 // Enable RTC
mbed_official 400:7fa56b1b9d45 85 __HAL_RCC_RTC_ENABLE();
mbed_official 400:7fa56b1b9d45 86
mbed_official 400:7fa56b1b9d45 87 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 400:7fa56b1b9d45 88 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 400:7fa56b1b9d45 89 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
mbed_official 400:7fa56b1b9d45 90 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 400:7fa56b1b9d45 91 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 400:7fa56b1b9d45 92 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 400:7fa56b1b9d45 93
mbed_official 400:7fa56b1b9d45 94 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 400:7fa56b1b9d45 95 error("RTC error: RTC initialization failed.");
mbed_official 400:7fa56b1b9d45 96 }
mbed_official 400:7fa56b1b9d45 97 }
mbed_official 400:7fa56b1b9d45 98
mbed_official 400:7fa56b1b9d45 99 void rtc_free(void) {
mbed_official 400:7fa56b1b9d45 100 // Enable Power clock
mbed_official 400:7fa56b1b9d45 101 __PWR_CLK_ENABLE();
mbed_official 400:7fa56b1b9d45 102
mbed_official 400:7fa56b1b9d45 103 // Enable access to Backup domain
mbed_official 400:7fa56b1b9d45 104 HAL_PWR_EnableBkUpAccess();
mbed_official 400:7fa56b1b9d45 105
mbed_official 400:7fa56b1b9d45 106 // Reset Backup domain
mbed_official 400:7fa56b1b9d45 107 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 400:7fa56b1b9d45 108 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 400:7fa56b1b9d45 109
mbed_official 400:7fa56b1b9d45 110 // Disable access to Backup domain
mbed_official 400:7fa56b1b9d45 111 HAL_PWR_DisableBkUpAccess();
mbed_official 400:7fa56b1b9d45 112
mbed_official 400:7fa56b1b9d45 113 // Disable LSI and LSE clocks
mbed_official 400:7fa56b1b9d45 114 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 400:7fa56b1b9d45 115 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 400:7fa56b1b9d45 116 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 400:7fa56b1b9d45 117 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 400:7fa56b1b9d45 118 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 400:7fa56b1b9d45 119 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 400:7fa56b1b9d45 120
mbed_official 400:7fa56b1b9d45 121 rtc_inited = 0;
mbed_official 400:7fa56b1b9d45 122 }
mbed_official 400:7fa56b1b9d45 123
mbed_official 400:7fa56b1b9d45 124 int rtc_isenabled(void) {
mbed_official 400:7fa56b1b9d45 125 return rtc_inited;
mbed_official 400:7fa56b1b9d45 126 }
mbed_official 400:7fa56b1b9d45 127
mbed_official 400:7fa56b1b9d45 128 /*
mbed_official 400:7fa56b1b9d45 129 RTC Registers
mbed_official 400:7fa56b1b9d45 130 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 400:7fa56b1b9d45 131 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 400:7fa56b1b9d45 132 RTC_Date day of the month 1-31
mbed_official 400:7fa56b1b9d45 133 RTC_Year year 0-99
mbed_official 400:7fa56b1b9d45 134 struct tm
mbed_official 400:7fa56b1b9d45 135 tm_sec seconds after the minute 0-61
mbed_official 400:7fa56b1b9d45 136 tm_min minutes after the hour 0-59
mbed_official 400:7fa56b1b9d45 137 tm_hour hours since midnight 0-23
mbed_official 400:7fa56b1b9d45 138 tm_mday day of the month 1-31
mbed_official 400:7fa56b1b9d45 139 tm_mon months since January 0-11
mbed_official 400:7fa56b1b9d45 140 tm_year years since 1900
mbed_official 400:7fa56b1b9d45 141 tm_wday days since Sunday 0-6
mbed_official 400:7fa56b1b9d45 142 tm_yday days since January 1 0-365
mbed_official 400:7fa56b1b9d45 143 tm_isdst Daylight Saving Time flag
mbed_official 400:7fa56b1b9d45 144 */
mbed_official 400:7fa56b1b9d45 145 time_t rtc_read(void) {
mbed_official 400:7fa56b1b9d45 146 RTC_DateTypeDef dateStruct;
mbed_official 400:7fa56b1b9d45 147 RTC_TimeTypeDef timeStruct;
mbed_official 400:7fa56b1b9d45 148 struct tm timeinfo;
mbed_official 400:7fa56b1b9d45 149
mbed_official 400:7fa56b1b9d45 150 RtcHandle.Instance = RTC;
mbed_official 400:7fa56b1b9d45 151
mbed_official 400:7fa56b1b9d45 152 // Read actual date and time
mbed_official 400:7fa56b1b9d45 153 // Warning: the time must be read first!
mbed_official 400:7fa56b1b9d45 154 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 400:7fa56b1b9d45 155 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 400:7fa56b1b9d45 156
mbed_official 400:7fa56b1b9d45 157 // Setup a tm structure based on the RTC
mbed_official 400:7fa56b1b9d45 158 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 400:7fa56b1b9d45 159 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 400:7fa56b1b9d45 160 timeinfo.tm_mday = dateStruct.Date;
mbed_official 400:7fa56b1b9d45 161 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 400:7fa56b1b9d45 162 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 400:7fa56b1b9d45 163 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 400:7fa56b1b9d45 164 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 400:7fa56b1b9d45 165
mbed_official 400:7fa56b1b9d45 166 // Convert to timestamp
mbed_official 400:7fa56b1b9d45 167 time_t t = mktime(&timeinfo);
mbed_official 400:7fa56b1b9d45 168
mbed_official 400:7fa56b1b9d45 169 return t;
mbed_official 400:7fa56b1b9d45 170 }
mbed_official 400:7fa56b1b9d45 171
mbed_official 400:7fa56b1b9d45 172 void rtc_write(time_t t) {
mbed_official 400:7fa56b1b9d45 173 RTC_DateTypeDef dateStruct;
mbed_official 400:7fa56b1b9d45 174 RTC_TimeTypeDef timeStruct;
mbed_official 400:7fa56b1b9d45 175
mbed_official 400:7fa56b1b9d45 176 RtcHandle.Instance = RTC;
mbed_official 400:7fa56b1b9d45 177
mbed_official 400:7fa56b1b9d45 178 // Convert the time into a tm
mbed_official 400:7fa56b1b9d45 179 struct tm *timeinfo = localtime(&t);
mbed_official 400:7fa56b1b9d45 180
mbed_official 400:7fa56b1b9d45 181 // Fill RTC structures
mbed_official 400:7fa56b1b9d45 182 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 400:7fa56b1b9d45 183 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 400:7fa56b1b9d45 184 dateStruct.Date = timeinfo->tm_mday;
mbed_official 400:7fa56b1b9d45 185 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 400:7fa56b1b9d45 186 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 400:7fa56b1b9d45 187 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 400:7fa56b1b9d45 188 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 400:7fa56b1b9d45 189 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 400:7fa56b1b9d45 190 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 400:7fa56b1b9d45 191 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 400:7fa56b1b9d45 192
mbed_official 400:7fa56b1b9d45 193 // Change the RTC current date/time
mbed_official 400:7fa56b1b9d45 194 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 400:7fa56b1b9d45 195 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 400:7fa56b1b9d45 196 }
mbed_official 400:7fa56b1b9d45 197
mbed_official 400:7fa56b1b9d45 198 #endif