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_F411RE/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 235:685d5f11838f 1 /* mbed Microcontroller Library
mbed_official 235:685d5f11838f 2 *******************************************************************************
mbed_official 235:685d5f11838f 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 235:685d5f11838f 4 * All rights reserved.
mbed_official 235:685d5f11838f 5 *
mbed_official 235:685d5f11838f 6 * Redistribution and use in source and binary forms, with or without
mbed_official 235:685d5f11838f 7 * modification, are permitted provided that the following conditions are met:
mbed_official 235:685d5f11838f 8 *
mbed_official 235:685d5f11838f 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 235:685d5f11838f 10 * this list of conditions and the following disclaimer.
mbed_official 235:685d5f11838f 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 235:685d5f11838f 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 235:685d5f11838f 13 * and/or other materials provided with the distribution.
mbed_official 235:685d5f11838f 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 235:685d5f11838f 15 * may be used to endorse or promote products derived from this software
mbed_official 235:685d5f11838f 16 * without specific prior written permission.
mbed_official 235:685d5f11838f 17 *
mbed_official 235:685d5f11838f 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 235:685d5f11838f 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 235:685d5f11838f 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 235:685d5f11838f 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 235:685d5f11838f 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 235:685d5f11838f 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 235:685d5f11838f 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 235:685d5f11838f 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 235:685d5f11838f 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 235:685d5f11838f 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 235:685d5f11838f 28 *******************************************************************************
mbed_official 235:685d5f11838f 29 */
mbed_official 235:685d5f11838f 30 #include "rtc_api.h"
mbed_official 235:685d5f11838f 31
mbed_official 235:685d5f11838f 32 #if DEVICE_RTC
mbed_official 235:685d5f11838f 33
mbed_official 251:de9a1e4ffd79 34 #include "error.h"
mbed_official 235:685d5f11838f 35
mbed_official 235:685d5f11838f 36 static int rtc_inited = 0;
mbed_official 235:685d5f11838f 37
mbed_official 235:685d5f11838f 38 static RTC_HandleTypeDef RtcHandle;
mbed_official 235:685d5f11838f 39
mbed_official 235:685d5f11838f 40 void rtc_init(void)
mbed_official 235:685d5f11838f 41 {
mbed_official 235:685d5f11838f 42 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 235:685d5f11838f 43 uint32_t rtc_freq = 0;
mbed_official 235:685d5f11838f 44
mbed_official 235:685d5f11838f 45 if (rtc_inited) return;
mbed_official 235:685d5f11838f 46 rtc_inited = 1;
mbed_official 235:685d5f11838f 47
mbed_official 235:685d5f11838f 48 RtcHandle.Instance = RTC;
mbed_official 235:685d5f11838f 49
mbed_official 235:685d5f11838f 50 // Enable Power clock
mbed_official 235:685d5f11838f 51 __PWR_CLK_ENABLE();
mbed_official 235:685d5f11838f 52
mbed_official 235:685d5f11838f 53 // Enable access to Backup domain
mbed_official 235:685d5f11838f 54 HAL_PWR_EnableBkUpAccess();
mbed_official 235:685d5f11838f 55
mbed_official 235:685d5f11838f 56 // Reset Backup domain
mbed_official 235:685d5f11838f 57 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 235:685d5f11838f 58 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 235:685d5f11838f 59
mbed_official 235:685d5f11838f 60 // Enable LSE Oscillator
mbed_official 235:685d5f11838f 61 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 235:685d5f11838f 62 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; /* Mandatory, otherwise the PLL is reconfigured! */
mbed_official 235:685d5f11838f 63 RCC_OscInitStruct.LSEState = RCC_LSE_ON; /* External 32.768 kHz clock on OSC_IN/OSC_OUT */
mbed_official 235:685d5f11838f 64 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 235:685d5f11838f 65 // Connect LSE to RTC
mbed_official 235:685d5f11838f 66 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE);
mbed_official 235:685d5f11838f 67 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 235:685d5f11838f 68 rtc_freq = LSE_VALUE;
mbed_official 235:685d5f11838f 69 } else {
mbed_official 235:685d5f11838f 70 // Enable LSI clock
mbed_official 235:685d5f11838f 71 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 235:685d5f11838f 72 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 235:685d5f11838f 73 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 235:685d5f11838f 74 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 235:685d5f11838f 75 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 235:685d5f11838f 76 error("RTC error: LSI clock initialization failed.");
mbed_official 235:685d5f11838f 77 }
mbed_official 235:685d5f11838f 78 // Connect LSI to RTC
mbed_official 235:685d5f11838f 79 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
mbed_official 235:685d5f11838f 80 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 235:685d5f11838f 81 // [TODO] This value is LSI typical value. To be measured precisely using a timer input capture
mbed_official 235:685d5f11838f 82 rtc_freq = LSI_VALUE;
mbed_official 235:685d5f11838f 83 }
mbed_official 235:685d5f11838f 84
mbed_official 235:685d5f11838f 85 // Enable RTC
mbed_official 235:685d5f11838f 86 __HAL_RCC_RTC_ENABLE();
mbed_official 235:685d5f11838f 87
mbed_official 235:685d5f11838f 88 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 235:685d5f11838f 89 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 235:685d5f11838f 90 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
mbed_official 235:685d5f11838f 91 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 235:685d5f11838f 92 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 235:685d5f11838f 93 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 235:685d5f11838f 94
mbed_official 235:685d5f11838f 95 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 235:685d5f11838f 96 error("RTC error: RTC initialization failed.");
mbed_official 235:685d5f11838f 97 }
mbed_official 235:685d5f11838f 98 }
mbed_official 235:685d5f11838f 99
mbed_official 235:685d5f11838f 100 void rtc_free(void)
mbed_official 235:685d5f11838f 101 {
mbed_official 235:685d5f11838f 102 // Enable Power clock
mbed_official 235:685d5f11838f 103 __PWR_CLK_ENABLE();
mbed_official 235:685d5f11838f 104
mbed_official 235:685d5f11838f 105 // Enable access to Backup domain
mbed_official 235:685d5f11838f 106 HAL_PWR_EnableBkUpAccess();
mbed_official 235:685d5f11838f 107
mbed_official 235:685d5f11838f 108 // Reset Backup domain
mbed_official 235:685d5f11838f 109 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 235:685d5f11838f 110 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 235:685d5f11838f 111
mbed_official 235:685d5f11838f 112 // Disable access to Backup domain
mbed_official 235:685d5f11838f 113 HAL_PWR_DisableBkUpAccess();
mbed_official 235:685d5f11838f 114
mbed_official 235:685d5f11838f 115 // Disable LSI and LSE clocks
mbed_official 235:685d5f11838f 116 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 235:685d5f11838f 117 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 235:685d5f11838f 118 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 235:685d5f11838f 119 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 235:685d5f11838f 120 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 235:685d5f11838f 121 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 235:685d5f11838f 122
mbed_official 235:685d5f11838f 123 rtc_inited = 0;
mbed_official 235:685d5f11838f 124 }
mbed_official 235:685d5f11838f 125
mbed_official 235:685d5f11838f 126 int rtc_isenabled(void)
mbed_official 235:685d5f11838f 127 {
mbed_official 235:685d5f11838f 128 return rtc_inited;
mbed_official 235:685d5f11838f 129 }
mbed_official 235:685d5f11838f 130
mbed_official 235:685d5f11838f 131 /*
mbed_official 235:685d5f11838f 132 RTC Registers
mbed_official 235:685d5f11838f 133 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 235:685d5f11838f 134 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 235:685d5f11838f 135 RTC_Date day of the month 1-31
mbed_official 235:685d5f11838f 136 RTC_Year year 0-99
mbed_official 235:685d5f11838f 137 struct tm
mbed_official 235:685d5f11838f 138 tm_sec seconds after the minute 0-61
mbed_official 235:685d5f11838f 139 tm_min minutes after the hour 0-59
mbed_official 235:685d5f11838f 140 tm_hour hours since midnight 0-23
mbed_official 235:685d5f11838f 141 tm_mday day of the month 1-31
mbed_official 235:685d5f11838f 142 tm_mon months since January 0-11
mbed_official 235:685d5f11838f 143 tm_year years since 1900
mbed_official 235:685d5f11838f 144 tm_wday days since Sunday 0-6
mbed_official 235:685d5f11838f 145 tm_yday days since January 1 0-365
mbed_official 235:685d5f11838f 146 tm_isdst Daylight Saving Time flag
mbed_official 235:685d5f11838f 147 */
mbed_official 235:685d5f11838f 148 time_t rtc_read(void)
mbed_official 235:685d5f11838f 149 {
mbed_official 235:685d5f11838f 150 RTC_DateTypeDef dateStruct;
mbed_official 235:685d5f11838f 151 RTC_TimeTypeDef timeStruct;
mbed_official 235:685d5f11838f 152 struct tm timeinfo;
mbed_official 235:685d5f11838f 153
mbed_official 235:685d5f11838f 154 RtcHandle.Instance = RTC;
mbed_official 235:685d5f11838f 155
mbed_official 235:685d5f11838f 156 // Read actual date and time
mbed_official 235:685d5f11838f 157 // Warning: the time must be read first!
mbed_official 235:685d5f11838f 158 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 235:685d5f11838f 159 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 235:685d5f11838f 160
mbed_official 235:685d5f11838f 161 // Setup a tm structure based on the RTC
mbed_official 235:685d5f11838f 162 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 235:685d5f11838f 163 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 235:685d5f11838f 164 timeinfo.tm_mday = dateStruct.Date;
mbed_official 235:685d5f11838f 165 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 235:685d5f11838f 166 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 235:685d5f11838f 167 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 235:685d5f11838f 168 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 235:685d5f11838f 169
mbed_official 235:685d5f11838f 170 // Convert to timestamp
mbed_official 235:685d5f11838f 171 time_t t = mktime(&timeinfo);
mbed_official 235:685d5f11838f 172
mbed_official 235:685d5f11838f 173 return t;
mbed_official 235:685d5f11838f 174 }
mbed_official 235:685d5f11838f 175
mbed_official 235:685d5f11838f 176 void rtc_write(time_t t)
mbed_official 235:685d5f11838f 177 {
mbed_official 235:685d5f11838f 178 RTC_DateTypeDef dateStruct;
mbed_official 235:685d5f11838f 179 RTC_TimeTypeDef timeStruct;
mbed_official 235:685d5f11838f 180
mbed_official 235:685d5f11838f 181 RtcHandle.Instance = RTC;
mbed_official 235:685d5f11838f 182
mbed_official 235:685d5f11838f 183 // Convert the time into a tm
mbed_official 235:685d5f11838f 184 struct tm *timeinfo = localtime(&t);
mbed_official 235:685d5f11838f 185
mbed_official 235:685d5f11838f 186 // Fill RTC structures
mbed_official 235:685d5f11838f 187 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 235:685d5f11838f 188 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 235:685d5f11838f 189 dateStruct.Date = timeinfo->tm_mday;
mbed_official 235:685d5f11838f 190 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 235:685d5f11838f 191 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 235:685d5f11838f 192 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 235:685d5f11838f 193 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 235:685d5f11838f 194 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 235:685d5f11838f 195 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 235:685d5f11838f 196 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 235:685d5f11838f 197
mbed_official 235:685d5f11838f 198 // Change the RTC current date/time
mbed_official 235:685d5f11838f 199 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 235:685d5f11838f 200 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 235:685d5f11838f 201 }
mbed_official 235:685d5f11838f 202
mbed_official 235:685d5f11838f 203 #endif