shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F401RE/rtc_api.c@125:23cc3068a9e4, 2014-03-19 (annotated)

Committer:
mbed_official
Date:
Wed Mar 19 10:15:22 2014 +0000
Revision:
125:23cc3068a9e4
Parent:
87:085cde657901
Child:
172:2f4f8c56b261
Synchronized with git revision ace35dfba3748c7cdc102eb38ec6b9e1067c3252



Full URL: https://github.com/mbedmicro/mbed/commit/ace35dfba3748c7cdc102eb38ec6b9e1067c3252/



[NUCLEO_F302R8] Add cmsis and hal files + change F401RE clock to 84MHz

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 87:085cde657901 1 /* mbed Microcontroller Library
mbed_official 87:085cde657901 2 *******************************************************************************
mbed_official 87:085cde657901 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 87:085cde657901 4 * All rights reserved.
mbed_official 87:085cde657901 5 *
mbed_official 87:085cde657901 6 * Redistribution and use in source and binary forms, with or without
mbed_official 87:085cde657901 7 * modification, are permitted provided that the following conditions are met:
mbed_official 87:085cde657901 8 *
mbed_official 87:085cde657901 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 87:085cde657901 10 * this list of conditions and the following disclaimer.
mbed_official 87:085cde657901 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 87:085cde657901 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 87:085cde657901 13 * and/or other materials provided with the distribution.
mbed_official 87:085cde657901 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 87:085cde657901 15 * may be used to endorse or promote products derived from this software
mbed_official 87:085cde657901 16 * without specific prior written permission.
mbed_official 87:085cde657901 17 *
mbed_official 87:085cde657901 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 87:085cde657901 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 87:085cde657901 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 87:085cde657901 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 87:085cde657901 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 87:085cde657901 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 87:085cde657901 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 87:085cde657901 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 87:085cde657901 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 87:085cde657901 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 87:085cde657901 28 *******************************************************************************
mbed_official 87:085cde657901 29 */
mbed_official 87:085cde657901 30 #include "rtc_api.h"
mbed_official 87:085cde657901 31 #include "stm32f4xx_hal.h"
mbed_official 87:085cde657901 32 #include "error.h"
mbed_official 87:085cde657901 33
mbed_official 87:085cde657901 34 static int rtc_inited = 0;
mbed_official 87:085cde657901 35
mbed_official 87:085cde657901 36 static RTC_HandleTypeDef RtcHandle;
mbed_official 87:085cde657901 37
mbed_official 87:085cde657901 38 void rtc_init(void) {
mbed_official 87:085cde657901 39 if (rtc_inited) return;
mbed_official 87:085cde657901 40 rtc_inited = 1;
mbed_official 87:085cde657901 41
mbed_official 87:085cde657901 42 RtcHandle.Instance = RTC;
mbed_official 87:085cde657901 43
mbed_official 87:085cde657901 44 // Enable Power clock
mbed_official 87:085cde657901 45 __PWR_CLK_ENABLE();
mbed_official 87:085cde657901 46
mbed_official 87:085cde657901 47 // Allow access to RTC
mbed_official 87:085cde657901 48 HAL_PWR_EnableBkUpAccess();
mbed_official 87:085cde657901 49
mbed_official 87:085cde657901 50 // Reset Backup domain
mbed_official 87:085cde657901 51 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 87:085cde657901 52 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 87:085cde657901 53
mbed_official 87:085cde657901 54 // Enable LSI clock
mbed_official 87:085cde657901 55 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 87:085cde657901 56 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 87:085cde657901 57 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 87:085cde657901 58 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 87:085cde657901 59 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 87:085cde657901 60 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 87:085cde657901 61 error("RTC error: LSI clock initialization failed.");
mbed_official 87:085cde657901 62 }
mbed_official 87:085cde657901 63
mbed_official 87:085cde657901 64 // Connect LSI to RTC
mbed_official 87:085cde657901 65 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
mbed_official 87:085cde657901 66 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 87:085cde657901 67
mbed_official 87:085cde657901 68 // Enable RTC clock
mbed_official 87:085cde657901 69 __HAL_RCC_RTC_ENABLE();
mbed_official 87:085cde657901 70
mbed_official 125:23cc3068a9e4 71 // [TODO] This value is LSI typical value. To be measured precisely using a timer input capture
mbed_official 87:085cde657901 72 uint32_t lsi_freq = 32000;
mbed_official 87:085cde657901 73
mbed_official 87:085cde657901 74 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 87:085cde657901 75 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 87:085cde657901 76 RtcHandle.Init.SynchPrediv = (lsi_freq / 128) - 1;
mbed_official 87:085cde657901 77 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 87:085cde657901 78 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 87:085cde657901 79 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 87:085cde657901 80 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 87:085cde657901 81 error("RTC error: RTC initialization failed.");
mbed_official 87:085cde657901 82 }
mbed_official 87:085cde657901 83 }
mbed_official 87:085cde657901 84
mbed_official 87:085cde657901 85 void rtc_free(void) {
mbed_official 87:085cde657901 86 // Enable Power clock
mbed_official 87:085cde657901 87 __PWR_CLK_ENABLE();
mbed_official 87:085cde657901 88
mbed_official 87:085cde657901 89 // Allow access to RTC
mbed_official 87:085cde657901 90 HAL_PWR_EnableBkUpAccess();
mbed_official 87:085cde657901 91
mbed_official 87:085cde657901 92 // Reset Backup domain
mbed_official 87:085cde657901 93 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 87:085cde657901 94 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 87:085cde657901 95
mbed_official 87:085cde657901 96 // Disable LSI clock
mbed_official 87:085cde657901 97 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 87:085cde657901 98 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI;
mbed_official 87:085cde657901 99 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 87:085cde657901 100 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 87:085cde657901 101 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 87:085cde657901 102
mbed_official 87:085cde657901 103 rtc_inited = 0;
mbed_official 87:085cde657901 104 }
mbed_official 87:085cde657901 105
mbed_official 87:085cde657901 106 int rtc_isenabled(void) {
mbed_official 87:085cde657901 107 return rtc_inited;
mbed_official 87:085cde657901 108 }
mbed_official 87:085cde657901 109
mbed_official 87:085cde657901 110 /*
mbed_official 87:085cde657901 111 RTC Registers
mbed_official 87:085cde657901 112 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 87:085cde657901 113 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 87:085cde657901 114 RTC_Date day of the month 1-31
mbed_official 87:085cde657901 115 RTC_Year year 0-99
mbed_official 87:085cde657901 116 struct tm
mbed_official 87:085cde657901 117 tm_sec seconds after the minute 0-61
mbed_official 87:085cde657901 118 tm_min minutes after the hour 0-59
mbed_official 87:085cde657901 119 tm_hour hours since midnight 0-23
mbed_official 87:085cde657901 120 tm_mday day of the month 1-31
mbed_official 87:085cde657901 121 tm_mon months since January 0-11
mbed_official 87:085cde657901 122 tm_year years since 1900
mbed_official 87:085cde657901 123 tm_wday days since Sunday 0-6
mbed_official 87:085cde657901 124 tm_yday days since January 1 0-365
mbed_official 87:085cde657901 125 tm_isdst Daylight Saving Time flag
mbed_official 87:085cde657901 126 */
mbed_official 87:085cde657901 127 time_t rtc_read(void) {
mbed_official 87:085cde657901 128 RTC_DateTypeDef dateStruct;
mbed_official 87:085cde657901 129 RTC_TimeTypeDef timeStruct;
mbed_official 87:085cde657901 130 struct tm timeinfo;
mbed_official 87:085cde657901 131
mbed_official 87:085cde657901 132 RtcHandle.Instance = RTC;
mbed_official 87:085cde657901 133
mbed_official 87:085cde657901 134 // Read actual date and time
mbed_official 87:085cde657901 135 // Warning: the time must be read first!
mbed_official 87:085cde657901 136 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 87:085cde657901 137 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 87:085cde657901 138
mbed_official 87:085cde657901 139 // Setup a tm structure based on the RTC
mbed_official 87:085cde657901 140 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 87:085cde657901 141 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 87:085cde657901 142 timeinfo.tm_mday = dateStruct.Date;
mbed_official 87:085cde657901 143 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 87:085cde657901 144 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 87:085cde657901 145 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 87:085cde657901 146 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 87:085cde657901 147
mbed_official 87:085cde657901 148 // Convert to timestamp
mbed_official 87:085cde657901 149 time_t t = mktime(&timeinfo);
mbed_official 87:085cde657901 150
mbed_official 87:085cde657901 151 return t;
mbed_official 87:085cde657901 152 }
mbed_official 87:085cde657901 153
mbed_official 87:085cde657901 154 void rtc_write(time_t t) {
mbed_official 87:085cde657901 155 RTC_DateTypeDef dateStruct;
mbed_official 87:085cde657901 156 RTC_TimeTypeDef timeStruct;
mbed_official 87:085cde657901 157
mbed_official 87:085cde657901 158 RtcHandle.Instance = RTC;
mbed_official 87:085cde657901 159
mbed_official 87:085cde657901 160 // Convert the time into a tm
mbed_official 87:085cde657901 161 struct tm *timeinfo = localtime(&t);
mbed_official 87:085cde657901 162
mbed_official 87:085cde657901 163 // Fill RTC structures
mbed_official 87:085cde657901 164 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 87:085cde657901 165 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 87:085cde657901 166 dateStruct.Date = timeinfo->tm_mday;
mbed_official 87:085cde657901 167 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 87:085cde657901 168 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 87:085cde657901 169 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 87:085cde657901 170 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 87:085cde657901 171 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 87:085cde657901 172 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 87:085cde657901 173 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 87:085cde657901 174
mbed_official 87:085cde657901 175 // Change the RTC current date/time
mbed_official 87:085cde657901 176 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 87:085cde657901 177 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 87:085cde657901 178 }