PHung Tung / DISCO-F746_WAV_PLAYER

SPKT

Dependencies:   F746_GUI SD_PlayerSkeleton F746_SAI_IO

SRC_STM32F7/targets/hal/TARGET_STM/TARGET_STM32F7/rtc_api.c@0:8ede47d38d10, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 21:37:21 2019 +0000
Revision:
0:8ede47d38d10
SPKT

Who changed what in which revision?

UserRevisionLine numberNew contents of line
phungductung 0:8ede47d38d10 1 /* mbed Microcontroller Library
phungductung 0:8ede47d38d10 2 *******************************************************************************
phungductung 0:8ede47d38d10 3 * Copyright (c) 2015, STMicroelectronics
phungductung 0:8ede47d38d10 4 * All rights reserved.
phungductung 0:8ede47d38d10 5 *
phungductung 0:8ede47d38d10 6 * Redistribution and use in source and binary forms, with or without
phungductung 0:8ede47d38d10 7 * modification, are permitted provided that the following conditions are met:
phungductung 0:8ede47d38d10 8 *
phungductung 0:8ede47d38d10 9 * 1. Redistributions of source code must retain the above copyright notice,
phungductung 0:8ede47d38d10 10 * this list of conditions and the following disclaimer.
phungductung 0:8ede47d38d10 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
phungductung 0:8ede47d38d10 12 * this list of conditions and the following disclaimer in the documentation
phungductung 0:8ede47d38d10 13 * and/or other materials provided with the distribution.
phungductung 0:8ede47d38d10 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
phungductung 0:8ede47d38d10 15 * may be used to endorse or promote products derived from this software
phungductung 0:8ede47d38d10 16 * without specific prior written permission.
phungductung 0:8ede47d38d10 17 *
phungductung 0:8ede47d38d10 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
phungductung 0:8ede47d38d10 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
phungductung 0:8ede47d38d10 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
phungductung 0:8ede47d38d10 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
phungductung 0:8ede47d38d10 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
phungductung 0:8ede47d38d10 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
phungductung 0:8ede47d38d10 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
phungductung 0:8ede47d38d10 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
phungductung 0:8ede47d38d10 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
phungductung 0:8ede47d38d10 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
phungductung 0:8ede47d38d10 28 *******************************************************************************
phungductung 0:8ede47d38d10 29 */
phungductung 0:8ede47d38d10 30 #include "rtc_api.h"
phungductung 0:8ede47d38d10 31
phungductung 0:8ede47d38d10 32 #if DEVICE_RTC
phungductung 0:8ede47d38d10 33
phungductung 0:8ede47d38d10 34 #include "mbed_error.h"
phungductung 0:8ede47d38d10 35
phungductung 0:8ede47d38d10 36 #if DEVICE_RTC_LSI
phungductung 0:8ede47d38d10 37 static int rtc_inited = 0;
phungductung 0:8ede47d38d10 38 #endif
phungductung 0:8ede47d38d10 39
phungductung 0:8ede47d38d10 40 static RTC_HandleTypeDef RtcHandle;
phungductung 0:8ede47d38d10 41
phungductung 0:8ede47d38d10 42 void rtc_init(void)
phungductung 0:8ede47d38d10 43 {
phungductung 0:8ede47d38d10 44 RCC_OscInitTypeDef RCC_OscInitStruct;
phungductung 0:8ede47d38d10 45 uint32_t rtc_freq = 0;
phungductung 0:8ede47d38d10 46
phungductung 0:8ede47d38d10 47 RtcHandle.Instance = RTC;
phungductung 0:8ede47d38d10 48
phungductung 0:8ede47d38d10 49 #if !DEVICE_RTC_LSI
phungductung 0:8ede47d38d10 50 // Enable LSE Oscillator
phungductung 0:8ede47d38d10 51 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
phungductung 0:8ede47d38d10 52 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
phungductung 0:8ede47d38d10 53 RCC_OscInitStruct.LSEState = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT
phungductung 0:8ede47d38d10 54 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
phungductung 0:8ede47d38d10 55 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { // Check if LSE has started correctly
phungductung 0:8ede47d38d10 56 // Connect LSE to RTC
phungductung 0:8ede47d38d10 57 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE);
phungductung 0:8ede47d38d10 58 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
phungductung 0:8ede47d38d10 59 rtc_freq = LSE_VALUE;
phungductung 0:8ede47d38d10 60 } else {
phungductung 0:8ede47d38d10 61 error("Cannot initialize RTC with LSE\n");
phungductung 0:8ede47d38d10 62 }
phungductung 0:8ede47d38d10 63 #else
phungductung 0:8ede47d38d10 64 // Enable Power clock
phungductung 0:8ede47d38d10 65 __PWR_CLK_ENABLE();
phungductung 0:8ede47d38d10 66
phungductung 0:8ede47d38d10 67 // Enable access to Backup domain
phungductung 0:8ede47d38d10 68 HAL_PWR_EnableBkUpAccess();
phungductung 0:8ede47d38d10 69
phungductung 0:8ede47d38d10 70 // Reset Backup domain
phungductung 0:8ede47d38d10 71 __HAL_RCC_BACKUPRESET_FORCE();
phungductung 0:8ede47d38d10 72 __HAL_RCC_BACKUPRESET_RELEASE();
phungductung 0:8ede47d38d10 73
phungductung 0:8ede47d38d10 74 // Enable LSI clock
phungductung 0:8ede47d38d10 75 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
phungductung 0:8ede47d38d10 76 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
phungductung 0:8ede47d38d10 77 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
phungductung 0:8ede47d38d10 78 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
phungductung 0:8ede47d38d10 79 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
phungductung 0:8ede47d38d10 80 error("Cannot initialize RTC with LSI\n");
phungductung 0:8ede47d38d10 81 }
phungductung 0:8ede47d38d10 82 // Connect LSI to RTC
phungductung 0:8ede47d38d10 83 __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
phungductung 0:8ede47d38d10 84 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
phungductung 0:8ede47d38d10 85 // This value is LSI typical value. To be measured precisely using a timer input capture for example.
phungductung 0:8ede47d38d10 86 rtc_freq = LSI_VALUE;
phungductung 0:8ede47d38d10 87 #endif
phungductung 0:8ede47d38d10 88
phungductung 0:8ede47d38d10 89 // Enable RTC
phungductung 0:8ede47d38d10 90 __HAL_RCC_RTC_ENABLE();
phungductung 0:8ede47d38d10 91
phungductung 0:8ede47d38d10 92 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
phungductung 0:8ede47d38d10 93 RtcHandle.Init.AsynchPrediv = 127;
phungductung 0:8ede47d38d10 94 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
phungductung 0:8ede47d38d10 95 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
phungductung 0:8ede47d38d10 96 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
phungductung 0:8ede47d38d10 97 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
phungductung 0:8ede47d38d10 98
phungductung 0:8ede47d38d10 99 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
phungductung 0:8ede47d38d10 100 error("RTC error: RTC initialization failed.");
phungductung 0:8ede47d38d10 101 }
phungductung 0:8ede47d38d10 102 }
phungductung 0:8ede47d38d10 103
phungductung 0:8ede47d38d10 104 void rtc_free(void)
phungductung 0:8ede47d38d10 105 {
phungductung 0:8ede47d38d10 106 #if DEVICE_RTC_LSI
phungductung 0:8ede47d38d10 107 // Enable Power clock
phungductung 0:8ede47d38d10 108 __PWR_CLK_ENABLE();
phungductung 0:8ede47d38d10 109
phungductung 0:8ede47d38d10 110 // Enable access to Backup domain
phungductung 0:8ede47d38d10 111 HAL_PWR_EnableBkUpAccess();
phungductung 0:8ede47d38d10 112
phungductung 0:8ede47d38d10 113 // Reset Backup domain
phungductung 0:8ede47d38d10 114 __HAL_RCC_BACKUPRESET_FORCE();
phungductung 0:8ede47d38d10 115 __HAL_RCC_BACKUPRESET_RELEASE();
phungductung 0:8ede47d38d10 116
phungductung 0:8ede47d38d10 117 // Disable access to Backup domain
phungductung 0:8ede47d38d10 118 HAL_PWR_DisableBkUpAccess();
phungductung 0:8ede47d38d10 119 #endif
phungductung 0:8ede47d38d10 120
phungductung 0:8ede47d38d10 121 // Disable LSI and LSE clocks
phungductung 0:8ede47d38d10 122 RCC_OscInitTypeDef RCC_OscInitStruct;
phungductung 0:8ede47d38d10 123 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
phungductung 0:8ede47d38d10 124 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
phungductung 0:8ede47d38d10 125 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
phungductung 0:8ede47d38d10 126 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
phungductung 0:8ede47d38d10 127 HAL_RCC_OscConfig(&RCC_OscInitStruct);
phungductung 0:8ede47d38d10 128
phungductung 0:8ede47d38d10 129 #if DEVICE_RTC_LSI
phungductung 0:8ede47d38d10 130 rtc_inited = 0;
phungductung 0:8ede47d38d10 131 #endif
phungductung 0:8ede47d38d10 132 }
phungductung 0:8ede47d38d10 133
phungductung 0:8ede47d38d10 134 int rtc_isenabled(void)
phungductung 0:8ede47d38d10 135 {
phungductung 0:8ede47d38d10 136 #if DEVICE_RTC_LSI
phungductung 0:8ede47d38d10 137 return rtc_inited;
phungductung 0:8ede47d38d10 138 #else
phungductung 0:8ede47d38d10 139 if ((RTC->ISR & RTC_ISR_INITS) == RTC_ISR_INITS) {
phungductung 0:8ede47d38d10 140 return 1;
phungductung 0:8ede47d38d10 141 } else {
phungductung 0:8ede47d38d10 142 return 0;
phungductung 0:8ede47d38d10 143 }
phungductung 0:8ede47d38d10 144 #endif
phungductung 0:8ede47d38d10 145 }
phungductung 0:8ede47d38d10 146
phungductung 0:8ede47d38d10 147 /*
phungductung 0:8ede47d38d10 148 RTC Registers
phungductung 0:8ede47d38d10 149 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
phungductung 0:8ede47d38d10 150 RTC_Month 1=january, 2=february, ..., 12=december
phungductung 0:8ede47d38d10 151 RTC_Date day of the month 1-31
phungductung 0:8ede47d38d10 152 RTC_Year year 0-99
phungductung 0:8ede47d38d10 153 struct tm
phungductung 0:8ede47d38d10 154 tm_sec seconds after the minute 0-61
phungductung 0:8ede47d38d10 155 tm_min minutes after the hour 0-59
phungductung 0:8ede47d38d10 156 tm_hour hours since midnight 0-23
phungductung 0:8ede47d38d10 157 tm_mday day of the month 1-31
phungductung 0:8ede47d38d10 158 tm_mon months since January 0-11
phungductung 0:8ede47d38d10 159 tm_year years since 1900
phungductung 0:8ede47d38d10 160 tm_wday days since Sunday 0-6
phungductung 0:8ede47d38d10 161 tm_yday days since January 1 0-365
phungductung 0:8ede47d38d10 162 tm_isdst Daylight Saving Time flag
phungductung 0:8ede47d38d10 163 */
phungductung 0:8ede47d38d10 164 time_t rtc_read(void)
phungductung 0:8ede47d38d10 165 {
phungductung 0:8ede47d38d10 166 RTC_DateTypeDef dateStruct;
phungductung 0:8ede47d38d10 167 RTC_TimeTypeDef timeStruct;
phungductung 0:8ede47d38d10 168 struct tm timeinfo;
phungductung 0:8ede47d38d10 169
phungductung 0:8ede47d38d10 170 RtcHandle.Instance = RTC;
phungductung 0:8ede47d38d10 171
phungductung 0:8ede47d38d10 172 // Read actual date and time
phungductung 0:8ede47d38d10 173 // Warning: the time must be read first!
phungductung 0:8ede47d38d10 174 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
phungductung 0:8ede47d38d10 175 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
phungductung 0:8ede47d38d10 176
phungductung 0:8ede47d38d10 177 // Setup a tm structure based on the RTC
phungductung 0:8ede47d38d10 178 timeinfo.tm_wday = dateStruct.WeekDay;
phungductung 0:8ede47d38d10 179 timeinfo.tm_mon = dateStruct.Month - 1;
phungductung 0:8ede47d38d10 180 timeinfo.tm_mday = dateStruct.Date;
phungductung 0:8ede47d38d10 181 timeinfo.tm_year = dateStruct.Year + 100;
phungductung 0:8ede47d38d10 182 timeinfo.tm_hour = timeStruct.Hours;
phungductung 0:8ede47d38d10 183 timeinfo.tm_min = timeStruct.Minutes;
phungductung 0:8ede47d38d10 184 timeinfo.tm_sec = timeStruct.Seconds;
phungductung 0:8ede47d38d10 185
phungductung 0:8ede47d38d10 186 // Convert to timestamp
phungductung 0:8ede47d38d10 187 time_t t = mktime(&timeinfo);
phungductung 0:8ede47d38d10 188
phungductung 0:8ede47d38d10 189 return t;
phungductung 0:8ede47d38d10 190 }
phungductung 0:8ede47d38d10 191
phungductung 0:8ede47d38d10 192 void rtc_write(time_t t)
phungductung 0:8ede47d38d10 193 {
phungductung 0:8ede47d38d10 194 RTC_DateTypeDef dateStruct;
phungductung 0:8ede47d38d10 195 RTC_TimeTypeDef timeStruct;
phungductung 0:8ede47d38d10 196
phungductung 0:8ede47d38d10 197 RtcHandle.Instance = RTC;
phungductung 0:8ede47d38d10 198
phungductung 0:8ede47d38d10 199 // Enable write access to Backup domain
phungductung 0:8ede47d38d10 200 HAL_PWR_EnableBkUpAccess();
phungductung 0:8ede47d38d10 201
phungductung 0:8ede47d38d10 202 // Convert the time into a tm
phungductung 0:8ede47d38d10 203 struct tm *timeinfo = localtime(&t);
phungductung 0:8ede47d38d10 204
phungductung 0:8ede47d38d10 205 // Fill RTC structures
phungductung 0:8ede47d38d10 206 dateStruct.WeekDay = timeinfo->tm_wday;
phungductung 0:8ede47d38d10 207 dateStruct.Month = timeinfo->tm_mon + 1;
phungductung 0:8ede47d38d10 208 dateStruct.Date = timeinfo->tm_mday;
phungductung 0:8ede47d38d10 209 dateStruct.Year = timeinfo->tm_year - 100;
phungductung 0:8ede47d38d10 210 timeStruct.Hours = timeinfo->tm_hour;
phungductung 0:8ede47d38d10 211 timeStruct.Minutes = timeinfo->tm_min;
phungductung 0:8ede47d38d10 212 timeStruct.Seconds = timeinfo->tm_sec;
phungductung 0:8ede47d38d10 213 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
phungductung 0:8ede47d38d10 214 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
phungductung 0:8ede47d38d10 215 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
phungductung 0:8ede47d38d10 216
phungductung 0:8ede47d38d10 217 // Change the RTC current date/time
phungductung 0:8ede47d38d10 218 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
phungductung 0:8ede47d38d10 219 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
phungductung 0:8ede47d38d10 220 }
phungductung 0:8ede47d38d10 221
phungductung 0:8ede47d38d10 222 #endif