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_F072RB/rtc_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
285:31249416b6f9 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 219:993c9b0acbcc 1 /* mbed Microcontroller Library
mbed_official 219:993c9b0acbcc 2 *******************************************************************************
mbed_official 219:993c9b0acbcc 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 219:993c9b0acbcc 4 * All rights reserved.
mbed_official 219:993c9b0acbcc 5 *
mbed_official 219:993c9b0acbcc 6 * Redistribution and use in source and binary forms, with or without
mbed_official 219:993c9b0acbcc 7 * modification, are permitted provided that the following conditions are met:
mbed_official 219:993c9b0acbcc 8 *
mbed_official 219:993c9b0acbcc 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 219:993c9b0acbcc 10 * this list of conditions and the following disclaimer.
mbed_official 219:993c9b0acbcc 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 219:993c9b0acbcc 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 219:993c9b0acbcc 13 * and/or other materials provided with the distribution.
mbed_official 219:993c9b0acbcc 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 219:993c9b0acbcc 15 * may be used to endorse or promote products derived from this software
mbed_official 219:993c9b0acbcc 16 * without specific prior written permission.
mbed_official 219:993c9b0acbcc 17 *
mbed_official 219:993c9b0acbcc 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 219:993c9b0acbcc 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 219:993c9b0acbcc 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 219:993c9b0acbcc 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 219:993c9b0acbcc 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 219:993c9b0acbcc 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 219:993c9b0acbcc 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 219:993c9b0acbcc 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 219:993c9b0acbcc 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 219:993c9b0acbcc 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 219:993c9b0acbcc 28 *******************************************************************************
mbed_official 219:993c9b0acbcc 29 */
mbed_official 219:993c9b0acbcc 30 #include "rtc_api.h"
mbed_official 219:993c9b0acbcc 31
mbed_official 219:993c9b0acbcc 32 #if DEVICE_RTC
mbed_official 219:993c9b0acbcc 33
mbed_official 285:31249416b6f9 34 #include "mbed_error.h"
mbed_official 219:993c9b0acbcc 35
mbed_official 219:993c9b0acbcc 36 static int rtc_inited = 0;
mbed_official 219:993c9b0acbcc 37
mbed_official 219:993c9b0acbcc 38 static RTC_HandleTypeDef RtcHandle;
mbed_official 219:993c9b0acbcc 39
mbed_official 219:993c9b0acbcc 40 void rtc_init(void) {
mbed_official 219:993c9b0acbcc 41 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 219:993c9b0acbcc 42 uint32_t rtc_freq = 0;
mbed_official 219:993c9b0acbcc 43
mbed_official 219:993c9b0acbcc 44 if (rtc_inited) return;
mbed_official 219:993c9b0acbcc 45 rtc_inited = 1;
mbed_official 219:993c9b0acbcc 46
mbed_official 219:993c9b0acbcc 47 RtcHandle.Instance = RTC;
mbed_official 219:993c9b0acbcc 48
mbed_official 219:993c9b0acbcc 49 // Enable Power clock
mbed_official 219:993c9b0acbcc 50 __PWR_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 51
mbed_official 219:993c9b0acbcc 52 // Enable access to Backup domain
mbed_official 219:993c9b0acbcc 53 HAL_PWR_EnableBkUpAccess();
mbed_official 219:993c9b0acbcc 54
mbed_official 219:993c9b0acbcc 55 // Reset Backup domain
mbed_official 219:993c9b0acbcc 56 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 219:993c9b0acbcc 57 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 219:993c9b0acbcc 58
mbed_official 219:993c9b0acbcc 59 // Enable LSE Oscillator
mbed_official 219:993c9b0acbcc 60 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
mbed_official 219:993c9b0acbcc 61 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; /* Mandatory, otherwise the PLL is reconfigured! */
mbed_official 219:993c9b0acbcc 62 RCC_OscInitStruct.LSEState = RCC_LSE_ON; /* External 32.768 kHz clock on OSC_IN/OSC_OUT */
mbed_official 219:993c9b0acbcc 63 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) {
mbed_official 219:993c9b0acbcc 64 // Connect LSE to RTC
mbed_official 219:993c9b0acbcc 65 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
mbed_official 219:993c9b0acbcc 66 rtc_freq = LSE_VALUE;
mbed_official 219:993c9b0acbcc 67 } else {
mbed_official 219:993c9b0acbcc 68 // Enable LSI clock
mbed_official 219:993c9b0acbcc 69 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 219:993c9b0acbcc 70 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
mbed_official 219:993c9b0acbcc 71 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 219:993c9b0acbcc 72 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
mbed_official 219:993c9b0acbcc 73 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
mbed_official 219:993c9b0acbcc 74 error("RTC error: LSI clock initialization failed.");
mbed_official 219:993c9b0acbcc 75 }
mbed_official 219:993c9b0acbcc 76 // Connect LSI to RTC
mbed_official 219:993c9b0acbcc 77 __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
mbed_official 219:993c9b0acbcc 78 // [TODO] This value is LSI typical value. To be measured precisely using a timer input capture.
mbed_official 219:993c9b0acbcc 79 rtc_freq = 32000;
mbed_official 219:993c9b0acbcc 80 }
mbed_official 219:993c9b0acbcc 81
mbed_official 219:993c9b0acbcc 82 // Enable RTC
mbed_official 219:993c9b0acbcc 83 __HAL_RCC_RTC_ENABLE();
mbed_official 219:993c9b0acbcc 84
mbed_official 219:993c9b0acbcc 85 RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
mbed_official 219:993c9b0acbcc 86 RtcHandle.Init.AsynchPrediv = 127;
mbed_official 219:993c9b0acbcc 87 RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1;
mbed_official 219:993c9b0acbcc 88 RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
mbed_official 219:993c9b0acbcc 89 RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
mbed_official 219:993c9b0acbcc 90 RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
mbed_official 219:993c9b0acbcc 91
mbed_official 219:993c9b0acbcc 92 if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
mbed_official 219:993c9b0acbcc 93 error("RTC error: RTC initialization failed.");
mbed_official 219:993c9b0acbcc 94 }
mbed_official 219:993c9b0acbcc 95 }
mbed_official 219:993c9b0acbcc 96
mbed_official 219:993c9b0acbcc 97 void rtc_free(void) {
mbed_official 219:993c9b0acbcc 98 // Enable Power clock
mbed_official 219:993c9b0acbcc 99 __PWR_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 100
mbed_official 219:993c9b0acbcc 101 // Enable access to Backup domain
mbed_official 219:993c9b0acbcc 102 HAL_PWR_EnableBkUpAccess();
mbed_official 219:993c9b0acbcc 103
mbed_official 219:993c9b0acbcc 104 // Reset Backup domain
mbed_official 219:993c9b0acbcc 105 __HAL_RCC_BACKUPRESET_FORCE();
mbed_official 219:993c9b0acbcc 106 __HAL_RCC_BACKUPRESET_RELEASE();
mbed_official 219:993c9b0acbcc 107
mbed_official 219:993c9b0acbcc 108 // Disable access to Backup domain
mbed_official 219:993c9b0acbcc 109 HAL_PWR_DisableBkUpAccess();
mbed_official 219:993c9b0acbcc 110
mbed_official 219:993c9b0acbcc 111 // Disable LSI and LSE clocks
mbed_official 219:993c9b0acbcc 112 RCC_OscInitTypeDef RCC_OscInitStruct;
mbed_official 219:993c9b0acbcc 113 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
mbed_official 219:993c9b0acbcc 114 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
mbed_official 219:993c9b0acbcc 115 RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
mbed_official 219:993c9b0acbcc 116 RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
mbed_official 219:993c9b0acbcc 117 HAL_RCC_OscConfig(&RCC_OscInitStruct);
mbed_official 219:993c9b0acbcc 118
mbed_official 219:993c9b0acbcc 119 rtc_inited = 0;
mbed_official 219:993c9b0acbcc 120 }
mbed_official 219:993c9b0acbcc 121
mbed_official 219:993c9b0acbcc 122 int rtc_isenabled(void) {
mbed_official 219:993c9b0acbcc 123 return rtc_inited;
mbed_official 219:993c9b0acbcc 124 }
mbed_official 219:993c9b0acbcc 125
mbed_official 219:993c9b0acbcc 126 /*
mbed_official 219:993c9b0acbcc 127 RTC Registers
mbed_official 219:993c9b0acbcc 128 RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
mbed_official 219:993c9b0acbcc 129 RTC_Month 1=january, 2=february, ..., 12=december
mbed_official 219:993c9b0acbcc 130 RTC_Date day of the month 1-31
mbed_official 219:993c9b0acbcc 131 RTC_Year year 0-99
mbed_official 219:993c9b0acbcc 132 struct tm
mbed_official 219:993c9b0acbcc 133 tm_sec seconds after the minute 0-61
mbed_official 219:993c9b0acbcc 134 tm_min minutes after the hour 0-59
mbed_official 219:993c9b0acbcc 135 tm_hour hours since midnight 0-23
mbed_official 219:993c9b0acbcc 136 tm_mday day of the month 1-31
mbed_official 219:993c9b0acbcc 137 tm_mon months since January 0-11
mbed_official 219:993c9b0acbcc 138 tm_year years since 1900
mbed_official 219:993c9b0acbcc 139 tm_wday days since Sunday 0-6
mbed_official 219:993c9b0acbcc 140 tm_yday days since January 1 0-365
mbed_official 219:993c9b0acbcc 141 tm_isdst Daylight Saving Time flag
mbed_official 219:993c9b0acbcc 142 */
mbed_official 219:993c9b0acbcc 143 time_t rtc_read(void) {
mbed_official 219:993c9b0acbcc 144 RTC_DateTypeDef dateStruct;
mbed_official 219:993c9b0acbcc 145 RTC_TimeTypeDef timeStruct;
mbed_official 219:993c9b0acbcc 146 struct tm timeinfo;
mbed_official 219:993c9b0acbcc 147
mbed_official 219:993c9b0acbcc 148 RtcHandle.Instance = RTC;
mbed_official 219:993c9b0acbcc 149
mbed_official 219:993c9b0acbcc 150 // Read actual date and time
mbed_official 219:993c9b0acbcc 151 // Warning: the time must be read first!
mbed_official 219:993c9b0acbcc 152 HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 153 HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 154
mbed_official 219:993c9b0acbcc 155 // Setup a tm structure based on the RTC
mbed_official 219:993c9b0acbcc 156 timeinfo.tm_wday = dateStruct.WeekDay;
mbed_official 219:993c9b0acbcc 157 timeinfo.tm_mon = dateStruct.Month - 1;
mbed_official 219:993c9b0acbcc 158 timeinfo.tm_mday = dateStruct.Date;
mbed_official 219:993c9b0acbcc 159 timeinfo.tm_year = dateStruct.Year + 100;
mbed_official 219:993c9b0acbcc 160 timeinfo.tm_hour = timeStruct.Hours;
mbed_official 219:993c9b0acbcc 161 timeinfo.tm_min = timeStruct.Minutes;
mbed_official 219:993c9b0acbcc 162 timeinfo.tm_sec = timeStruct.Seconds;
mbed_official 219:993c9b0acbcc 163
mbed_official 219:993c9b0acbcc 164 // Convert to timestamp
mbed_official 219:993c9b0acbcc 165 time_t t = mktime(&timeinfo);
mbed_official 219:993c9b0acbcc 166
mbed_official 219:993c9b0acbcc 167 return t;
mbed_official 219:993c9b0acbcc 168 }
mbed_official 219:993c9b0acbcc 169
mbed_official 219:993c9b0acbcc 170 void rtc_write(time_t t) {
mbed_official 219:993c9b0acbcc 171 RTC_DateTypeDef dateStruct;
mbed_official 219:993c9b0acbcc 172 RTC_TimeTypeDef timeStruct;
mbed_official 219:993c9b0acbcc 173
mbed_official 219:993c9b0acbcc 174 RtcHandle.Instance = RTC;
mbed_official 219:993c9b0acbcc 175
mbed_official 219:993c9b0acbcc 176 // Convert the time into a tm
mbed_official 219:993c9b0acbcc 177 struct tm *timeinfo = localtime(&t);
mbed_official 219:993c9b0acbcc 178
mbed_official 219:993c9b0acbcc 179 // Fill RTC structures
mbed_official 219:993c9b0acbcc 180 dateStruct.WeekDay = timeinfo->tm_wday;
mbed_official 219:993c9b0acbcc 181 dateStruct.Month = timeinfo->tm_mon + 1;
mbed_official 219:993c9b0acbcc 182 dateStruct.Date = timeinfo->tm_mday;
mbed_official 219:993c9b0acbcc 183 dateStruct.Year = timeinfo->tm_year - 100;
mbed_official 219:993c9b0acbcc 184 timeStruct.Hours = timeinfo->tm_hour;
mbed_official 219:993c9b0acbcc 185 timeStruct.Minutes = timeinfo->tm_min;
mbed_official 219:993c9b0acbcc 186 timeStruct.Seconds = timeinfo->tm_sec;
mbed_official 219:993c9b0acbcc 187 timeStruct.TimeFormat = RTC_HOURFORMAT12_PM;
mbed_official 219:993c9b0acbcc 188 timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
mbed_official 219:993c9b0acbcc 189 timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
mbed_official 219:993c9b0acbcc 190
mbed_official 219:993c9b0acbcc 191 // Change the RTC current date/time
mbed_official 219:993c9b0acbcc 192 HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 193 HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN);
mbed_official 219:993c9b0acbcc 194 }
mbed_official 219:993c9b0acbcc 195
mbed_official 219:993c9b0acbcc 196 #endif