mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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:

Import librarymbed

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_F030R8/rtc_api.c@402:09075a3b15e3, 2014-11-14 (annotated)

Committer:
mbed_official
Date:
Fri Nov 14 09:00:07 2014 +0000
Revision:
402:09075a3b15e3
Parent:
340:28d1f895c6fe
Child:
404:cbc7dfcb0ce9
Synchronized with git revision dffeedc96e731e30785ca4a7842fb9769412bea1



Full URL: https://github.com/mbedmicro/mbed/commit/dffeedc96e731e30785ca4a7842fb9769412bea1/



Targets: add USBTX and USBRX pin definitions for targets that don't provide them

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 *******************************************************************************
mbed_official 76:aeb1df146756 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 4 * All rights reserved.
mbed_official 76:aeb1df146756 5 *
mbed_official 76:aeb1df146756 6 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 7 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 8 *
mbed_official 76:aeb1df146756 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 10 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 13 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 15 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 16 * without specific prior written permission.
mbed_official 76:aeb1df146756 17 *
mbed_official 76:aeb1df146756 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 28 *******************************************************************************
mbed_official 76:aeb1df146756 29 */
mbed_official 76:aeb1df146756 30 #include "rtc_api.h"
mbed_official 76:aeb1df146756 31
mbed_official 166:cb4253f91ada 32 #if DEVICE_RTC
mbed_official 166:cb4253f91ada 33
mbed_official 340:28d1f895c6fe 34 #include "mbed_error.h"
mbed_official 166:cb4253f91ada 35
mbed_official 76:aeb1df146756 36 static int rtc_inited = 0;
mbed_official 76:aeb1df146756 37
mbed_official 340:28d1f895c6fe 38 static RTC_HandleTypeDef RtcHandle;
mbed_official 340:28d1f895c6fe 39
mbed_official 402:09075a3b15e3 40 void rtc_init(void)
mbed_official 402:09075a3b15e3 41 {
mbed_official 340:28d1f895c6fe 42 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 166:cb4253f91ada 43 uint32_t rtc_freq = 0;
mbed_official 166:cb4253f91ada 44
mbed_official 340:28d1f895c6fe 45 if (rtc_inited) return;
mbed_official 340:28d1f895c6fe 46 rtc_inited = 1;
mbed_official 76:aeb1df146756 47
mbed_official 340:28d1f895c6fe 48 RtcHandle.Instance = RTC;
mbed_official 166:cb4253f91ada 49
mbed_official 340:28d1f895c6fe 50 // Enable Power clock
mbed_official 340:28d1f895c6fe 51 __PWR_CLK_ENABLE();
mbed_official 216:577900467c9e 52
mbed_official 340:28d1f895c6fe 53 // Enable access to Backup domain
mbed_official 340:28d1f895c6fe 54 HAL_PWR_EnableBkUpAccess();
mbed_official 340:28d1f895c6fe 55
mbed_official 340:28d1f895c6fe 56 // Reset Backup domain
mbed_official 340:28d1f895c6fe 57 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 340:28d1f895c6fe 58 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 76:aeb1df146756 59
mbed_official 340:28d1f895c6fe 60 // Enable LSE Oscillator
mbed_official 340:28d1f895c6fe 61 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 340:28d1f895c6fe 62 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; /* Mandatory, otherwise the PLL is reconfigured! */
mbed_official 340:28d1f895c6fe 63 RCC_OscInitStruct.LSEState = RCC_LSE_ON; /* External 32.768 kHz clock on OSC_IN/OSC_OUT */
mbed_official 340:28d1f895c6fe 64 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 340:28d1f895c6fe 65 // Connect LSE to RTC
mbed_official 340:28d1f895c6fe 66 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 340:28d1f895c6fe 67 rtc_freq = LSE_VALUE;
mbed_official 216:577900467c9e 68 } else {
mbed_official 340:28d1f895c6fe 69 // Enable LSI clock
mbed_official 340:28d1f895c6fe 70 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 340:28d1f895c6fe 71 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 340:28d1f895c6fe 72 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 340:28d1f895c6fe 73 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 340:28d1f895c6fe 74 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 340:28d1f895c6fe 75 error("RTC error: LSI clock initialization failed.");
mbed_official 340:28d1f895c6fe 76 }
mbed_official 340:28d1f895c6fe 77 // Connect LSI to RTC
mbed_official 340:28d1f895c6fe 78 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 340:28d1f895c6fe 79 // [TODO] This value is LSI typical value. To be measured precisely using a timer input capture.
mbed_official 340:28d1f895c6fe 80 rtc_freq = 32000;
mbed_official 166:cb4253f91ada 81 }
mbed_official 216:577900467c9e 82
mbed_official 340:28d1f895c6fe 83 // Enable RTC
mbed_official 340:28d1f895c6fe 84 __HAL_RCC_RTC_ENABLE();
mbed_official 76:aeb1df146756 85
mbed_official 340:28d1f895c6fe 86 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 340:28d1f895c6fe 87 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 340:28d1f895c6fe 88 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
mbed_official 340:28d1f895c6fe 89 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 340:28d1f895c6fe 90 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 340:28d1f895c6fe 91 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 216:577900467c9e 92
mbed_official 340:28d1f895c6fe 93 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 340:28d1f895c6fe 94 error("RTC error: RTC initialization failed.");
mbed_official 340:28d1f895c6fe 95 }
mbed_official 76:aeb1df146756 96 }
mbed_official 76:aeb1df146756 97
mbed_official 402:09075a3b15e3 98 void rtc_free(void)
mbed_official 402:09075a3b15e3 99 {
mbed_official 340:28d1f895c6fe 100 // Enable Power clock
mbed_official 340:28d1f895c6fe 101 __PWR_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 102
mbed_official 340:28d1f895c6fe 103 // Enable access to Backup domain
mbed_official 340:28d1f895c6fe 104 HAL_PWR_EnableBkUpAccess();
mbed_official 340:28d1f895c6fe 105
mbed_official 340:28d1f895c6fe 106 // Reset Backup domain
mbed_official 340:28d1f895c6fe 107 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 340:28d1f895c6fe 108 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 340:28d1f895c6fe 109
mbed_official 340:28d1f895c6fe 110 // Disable access to Backup domain
mbed_official 340:28d1f895c6fe 111 HAL_PWR_DisableBkUpAccess();
mbed_official 340:28d1f895c6fe 112
mbed_official 340:28d1f895c6fe 113 // Disable LSI and LSE clocks
mbed_official 340:28d1f895c6fe 114 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 340:28d1f895c6fe 115 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 340:28d1f895c6fe 116 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 340:28d1f895c6fe 117 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 340:28d1f895c6fe 118 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 340:28d1f895c6fe 119 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 216:577900467c9e 120
mbed_official 76:aeb1df146756 121 rtc_inited = 0;
mbed_official 76:aeb1df146756 122 }
mbed_official 76:aeb1df146756 123
mbed_official 402:09075a3b15e3 124 int rtc_isenabled(void)
mbed_official 402:09075a3b15e3 125 {
mbed_official 76:aeb1df146756 126 return rtc_inited;
mbed_official 76:aeb1df146756 127 }
mbed_official 76:aeb1df146756 128
mbed_official 76:aeb1df146756 129 /*
mbed_official 76:aeb1df146756 130 RTC Registers
mbed_official 76:aeb1df146756 131 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 76:aeb1df146756 132 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 76:aeb1df146756 133 RTC_Date day of the month 1-31
mbed_official 76:aeb1df146756 134 RTC_Year year 0-99
mbed_official 76:aeb1df146756 135 struct tm
mbed_official 76:aeb1df146756 136 tm_sec seconds after the minute 0-61
mbed_official 76:aeb1df146756 137 tm_min minutes after the hour 0-59
mbed_official 76:aeb1df146756 138 tm_hour hours since midnight 0-23
mbed_official 76:aeb1df146756 139 tm_mday day of the month 1-31
mbed_official 76:aeb1df146756 140 tm_mon months since January 0-11
mbed_official 76:aeb1df146756 141 tm_year years since 1900
mbed_official 76:aeb1df146756 142 tm_wday days since Sunday 0-6
mbed_official 76:aeb1df146756 143 tm_yday days since January 1 0-365
mbed_official 76:aeb1df146756 144 tm_isdst Daylight Saving Time flag
mbed_official 76:aeb1df146756 145 */
mbed_official 402:09075a3b15e3 146 time_t rtc_read(void)
mbed_official 402:09075a3b15e3 147 {
mbed_official 76:aeb1df146756 148 RTC_DateTypeDef dateStruct;
mbed_official 76:aeb1df146756 149 RTC_TimeTypeDef timeStruct;
mbed_official 76:aeb1df146756 150 struct tm timeinfo;
mbed_official 216:577900467c9e 151
mbed_official 340:28d1f895c6fe 152 RtcHandle.Instance = RTC;
mbed_official 340:28d1f895c6fe 153
mbed_official 76:aeb1df146756 154 // Read actual date and time
mbed_official 340:28d1f895c6fe 155 // Warning: the time must be read first!
mbed_official 340:28d1f895c6fe 156 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 340:28d1f895c6fe 157 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 216:577900467c9e 158
mbed_official 76:aeb1df146756 159 // Setup a tm structure based on the RTC
mbed_official 340:28d1f895c6fe 160 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 340:28d1f895c6fe 161 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 340:28d1f895c6fe 162 timeinfo.tm_mday = dateStruct.Date;
mbed_official 340:28d1f895c6fe 163 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 340:28d1f895c6fe 164 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 340:28d1f895c6fe 165 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 340:28d1f895c6fe 166 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 216:577900467c9e 167
mbed_official 76:aeb1df146756 168 // Convert to timestamp
mbed_official 76:aeb1df146756 169 time_t t = mktime(&timeinfo);
mbed_official 216:577900467c9e 170
mbed_official 216:577900467c9e 171 return t;
mbed_official 76:aeb1df146756 172 }
mbed_official 76:aeb1df146756 173
mbed_official 402:09075a3b15e3 174 void rtc_write(time_t t)
mbed_official 402:09075a3b15e3 175 {
mbed_official 76:aeb1df146756 176 RTC_DateTypeDef dateStruct;
mbed_official 76:aeb1df146756 177 RTC_TimeTypeDef timeStruct;
mbed_official 76:aeb1df146756 178
mbed_official 340:28d1f895c6fe 179 RtcHandle.Instance = RTC;
mbed_official 340:28d1f895c6fe 180
mbed_official 76:aeb1df146756 181 // Convert the time into a tm
mbed_official 76:aeb1df146756 182 struct tm *timeinfo = localtime(&t);
mbed_official 216:577900467c9e 183
mbed_official 76:aeb1df146756 184 // Fill RTC structures
mbed_official 340:28d1f895c6fe 185 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 340:28d1f895c6fe 186 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 340:28d1f895c6fe 187 dateStruct.Date = timeinfo->tm_mday;
mbed_official 340:28d1f895c6fe 188 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 340:28d1f895c6fe 189 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 340:28d1f895c6fe 190 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 340:28d1f895c6fe 191 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 340:28d1f895c6fe 192 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 340:28d1f895c6fe 193 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 340:28d1f895c6fe 194 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 216:577900467c9e 195
mbed_official 76:aeb1df146756 196 // Change the RTC current date/time
mbed_official 340:28d1f895c6fe 197 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 340:28d1f895c6fe 198 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 76:aeb1df146756 199 }
mbed_official 166:cb4253f91ada 200
mbed_official 166:cb4253f91ada 201 #endif