mbed library sources. Supersedes mbed-src.
Fork of mbed by
targets/hal/TARGET_STM/TARGET_STM32L0/rtc_api.c@113:b3775bf36a83, 2016-04-19 (annotated)
- Committer:
- mbed_official
- Date:
- Tue Apr 19 11:15:15 2016 +0100
- Revision:
- 113:b3775bf36a83
- Parent:
- 105:364b35371a11
- Child:
- 144:ef7eb2e8f9f7
Synchronized with git revision 896981126b34b6d9441e3eea77881c67a1ae3dbd
Full URL: https://github.com/mbedmicro/mbed/commit/896981126b34b6d9441e3eea77881c67a1ae3dbd/
Exporter tool addition for e2 studio
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 100:7c647ea3c13d | 1 | /* mbed Microcontroller Library |
mbed_official | 100:7c647ea3c13d | 2 | ******************************************************************************* |
mbed_official | 100:7c647ea3c13d | 3 | * Copyright (c) 2014, STMicroelectronics |
mbed_official | 100:7c647ea3c13d | 4 | * All rights reserved. |
mbed_official | 100:7c647ea3c13d | 5 | * |
mbed_official | 100:7c647ea3c13d | 6 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 100:7c647ea3c13d | 7 | * modification, are permitted provided that the following conditions are met: |
mbed_official | 100:7c647ea3c13d | 8 | * |
mbed_official | 100:7c647ea3c13d | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 100:7c647ea3c13d | 10 | * this list of conditions and the following disclaimer. |
mbed_official | 100:7c647ea3c13d | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 100:7c647ea3c13d | 12 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 100:7c647ea3c13d | 13 | * and/or other materials provided with the distribution. |
mbed_official | 100:7c647ea3c13d | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 100:7c647ea3c13d | 15 | * may be used to endorse or promote products derived from this software |
mbed_official | 100:7c647ea3c13d | 16 | * without specific prior written permission. |
mbed_official | 100:7c647ea3c13d | 17 | * |
mbed_official | 100:7c647ea3c13d | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 100:7c647ea3c13d | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 100:7c647ea3c13d | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 100:7c647ea3c13d | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 100:7c647ea3c13d | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 100:7c647ea3c13d | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 100:7c647ea3c13d | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 100:7c647ea3c13d | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 100:7c647ea3c13d | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 100:7c647ea3c13d | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 100:7c647ea3c13d | 28 | ******************************************************************************* |
mbed_official | 100:7c647ea3c13d | 29 | */ |
mbed_official | 100:7c647ea3c13d | 30 | #include "rtc_api.h" |
mbed_official | 100:7c647ea3c13d | 31 | |
mbed_official | 100:7c647ea3c13d | 32 | #if DEVICE_RTC |
mbed_official | 100:7c647ea3c13d | 33 | |
mbed_official | 100:7c647ea3c13d | 34 | #include "mbed_error.h" |
mbed_official | 100:7c647ea3c13d | 35 | |
mbed_official | 100:7c647ea3c13d | 36 | #if DEVICE_RTC_LSI |
mbed_official | 100:7c647ea3c13d | 37 | static int rtc_inited = 0; |
mbed_official | 100:7c647ea3c13d | 38 | #endif |
mbed_official | 100:7c647ea3c13d | 39 | |
mbed_official | 100:7c647ea3c13d | 40 | static RTC_HandleTypeDef RtcHandle; |
mbed_official | 100:7c647ea3c13d | 41 | |
mbed_official | 100:7c647ea3c13d | 42 | void rtc_init(void) |
mbed_official | 100:7c647ea3c13d | 43 | { |
mbed_official | 100:7c647ea3c13d | 44 | RCC_OscInitTypeDef RCC_OscInitStruct; |
mbed_official | 113:b3775bf36a83 | 45 | RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; |
mbed_official | 100:7c647ea3c13d | 46 | uint32_t rtc_freq = 0; |
mbed_official | 100:7c647ea3c13d | 47 | |
mbed_official | 100:7c647ea3c13d | 48 | #if DEVICE_RTC_LSI |
mbed_official | 100:7c647ea3c13d | 49 | if (rtc_inited) return; |
mbed_official | 100:7c647ea3c13d | 50 | rtc_inited = 1; |
mbed_official | 100:7c647ea3c13d | 51 | #endif |
mbed_official | 100:7c647ea3c13d | 52 | |
mbed_official | 100:7c647ea3c13d | 53 | RtcHandle.Instance = RTC; |
mbed_official | 100:7c647ea3c13d | 54 | |
mbed_official | 113:b3775bf36a83 | 55 | // Note : Due to a change inside stm32l0xx_hal_rcc.c (v1.2 to v1.5) the bit DBP of the register |
mbed_official | 113:b3775bf36a83 | 56 | // PWR_CR is now reset by the fonction HAL_RCC_OscConfig(). |
mbed_official | 105:364b35371a11 | 57 | // Enable Power clock |
mbed_official | 105:364b35371a11 | 58 | __PWR_CLK_ENABLE(); |
mbed_official | 105:364b35371a11 | 59 | |
mbed_official | 105:364b35371a11 | 60 | // Enable access to Backup domain |
mbed_official | 105:364b35371a11 | 61 | HAL_PWR_EnableBkUpAccess(); |
mbed_official | 105:364b35371a11 | 62 | |
mbed_official | 113:b3775bf36a83 | 63 | #if !DEVICE_RTC_LSI |
mbed_official | 113:b3775bf36a83 | 64 | // Enable LSE Oscillator |
mbed_official | 113:b3775bf36a83 | 65 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; |
mbed_official | 113:b3775bf36a83 | 66 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured! |
mbed_official | 113:b3775bf36a83 | 67 | RCC_OscInitStruct.LSEState = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT |
mbed_official | 113:b3775bf36a83 | 68 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
mbed_official | 113:b3775bf36a83 | 69 | error("Cannot initialize RTC with LSE\n"); |
mbed_official | 113:b3775bf36a83 | 70 | } |
mbed_official | 113:b3775bf36a83 | 71 | // Connect LSE to RTC |
mbed_official | 113:b3775bf36a83 | 72 | PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; |
mbed_official | 113:b3775bf36a83 | 73 | PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; |
mbed_official | 113:b3775bf36a83 | 74 | if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) { |
mbed_official | 113:b3775bf36a83 | 75 | error("Cannot initialize RTC with LSI\n"); |
mbed_official | 113:b3775bf36a83 | 76 | } |
mbed_official | 113:b3775bf36a83 | 77 | rtc_freq = LSE_VALUE; |
mbed_official | 113:b3775bf36a83 | 78 | #else |
mbed_official | 105:364b35371a11 | 79 | // Reset Backup domain |
mbed_official | 105:364b35371a11 | 80 | __HAL_RCC_BACKUPRESET_FORCE(); |
mbed_official | 105:364b35371a11 | 81 | __HAL_RCC_BACKUPRESET_RELEASE(); |
mbed_official | 105:364b35371a11 | 82 | |
mbed_official | 100:7c647ea3c13d | 83 | // Enable LSI clock |
mbed_official | 100:7c647ea3c13d | 84 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE; |
mbed_official | 100:7c647ea3c13d | 85 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured! |
mbed_official | 100:7c647ea3c13d | 86 | RCC_OscInitStruct.LSEState = RCC_LSE_OFF; |
mbed_official | 100:7c647ea3c13d | 87 | RCC_OscInitStruct.LSIState = RCC_LSI_ON; |
mbed_official | 100:7c647ea3c13d | 88 | if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { |
mbed_official | 100:7c647ea3c13d | 89 | error("RTC error: LSI clock initialization failed."); |
mbed_official | 100:7c647ea3c13d | 90 | } |
mbed_official | 100:7c647ea3c13d | 91 | // Connect LSI to RTC |
mbed_official | 113:b3775bf36a83 | 92 | PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; |
mbed_official | 113:b3775bf36a83 | 93 | PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI; |
mbed_official | 113:b3775bf36a83 | 94 | if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) { |
mbed_official | 113:b3775bf36a83 | 95 | error("Cannot initialize RTC with LSI\n"); |
mbed_official | 113:b3775bf36a83 | 96 | } |
mbed_official | 100:7c647ea3c13d | 97 | // This value is LSI typical value. To be measured precisely using a timer input capture for example. |
mbed_official | 100:7c647ea3c13d | 98 | rtc_freq = 38000; |
mbed_official | 100:7c647ea3c13d | 99 | #endif |
mbed_official | 100:7c647ea3c13d | 100 | |
mbed_official | 100:7c647ea3c13d | 101 | // Enable RTC |
mbed_official | 100:7c647ea3c13d | 102 | __HAL_RCC_RTC_ENABLE(); |
mbed_official | 100:7c647ea3c13d | 103 | |
mbed_official | 100:7c647ea3c13d | 104 | RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24; |
mbed_official | 100:7c647ea3c13d | 105 | RtcHandle.Init.AsynchPrediv = 127; |
mbed_official | 100:7c647ea3c13d | 106 | RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1; |
mbed_official | 100:7c647ea3c13d | 107 | RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE; |
mbed_official | 100:7c647ea3c13d | 108 | RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; |
mbed_official | 100:7c647ea3c13d | 109 | RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; |
mbed_official | 100:7c647ea3c13d | 110 | |
mbed_official | 100:7c647ea3c13d | 111 | if (HAL_RTC_Init(&RtcHandle) != HAL_OK) { |
mbed_official | 100:7c647ea3c13d | 112 | error("RTC error: RTC initialization failed."); |
mbed_official | 100:7c647ea3c13d | 113 | } |
mbed_official | 100:7c647ea3c13d | 114 | } |
mbed_official | 100:7c647ea3c13d | 115 | |
mbed_official | 100:7c647ea3c13d | 116 | void rtc_free(void) |
mbed_official | 100:7c647ea3c13d | 117 | { |
mbed_official | 105:364b35371a11 | 118 | #if DEVICE_RTC_LSI |
mbed_official | 100:7c647ea3c13d | 119 | // Enable Power clock |
mbed_official | 100:7c647ea3c13d | 120 | __PWR_CLK_ENABLE(); |
mbed_official | 100:7c647ea3c13d | 121 | |
mbed_official | 100:7c647ea3c13d | 122 | // Enable access to Backup domain |
mbed_official | 100:7c647ea3c13d | 123 | HAL_PWR_EnableBkUpAccess(); |
mbed_official | 100:7c647ea3c13d | 124 | |
mbed_official | 100:7c647ea3c13d | 125 | // Reset Backup domain |
mbed_official | 100:7c647ea3c13d | 126 | __HAL_RCC_BACKUPRESET_FORCE(); |
mbed_official | 100:7c647ea3c13d | 127 | __HAL_RCC_BACKUPRESET_RELEASE(); |
mbed_official | 100:7c647ea3c13d | 128 | |
mbed_official | 100:7c647ea3c13d | 129 | // Disable access to Backup domain |
mbed_official | 100:7c647ea3c13d | 130 | HAL_PWR_DisableBkUpAccess(); |
mbed_official | 105:364b35371a11 | 131 | #endif |
mbed_official | 100:7c647ea3c13d | 132 | |
mbed_official | 100:7c647ea3c13d | 133 | // Disable LSI and LSE clocks |
mbed_official | 100:7c647ea3c13d | 134 | RCC_OscInitTypeDef RCC_OscInitStruct; |
mbed_official | 100:7c647ea3c13d | 135 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE; |
mbed_official | 100:7c647ea3c13d | 136 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
mbed_official | 100:7c647ea3c13d | 137 | RCC_OscInitStruct.LSIState = RCC_LSI_OFF; |
mbed_official | 100:7c647ea3c13d | 138 | RCC_OscInitStruct.LSEState = RCC_LSE_OFF; |
mbed_official | 100:7c647ea3c13d | 139 | HAL_RCC_OscConfig(&RCC_OscInitStruct); |
mbed_official | 100:7c647ea3c13d | 140 | |
mbed_official | 100:7c647ea3c13d | 141 | #if DEVICE_RTC_LSI |
mbed_official | 100:7c647ea3c13d | 142 | rtc_inited = 0; |
mbed_official | 100:7c647ea3c13d | 143 | #endif |
mbed_official | 100:7c647ea3c13d | 144 | } |
mbed_official | 100:7c647ea3c13d | 145 | |
mbed_official | 100:7c647ea3c13d | 146 | int rtc_isenabled(void) |
mbed_official | 100:7c647ea3c13d | 147 | { |
mbed_official | 100:7c647ea3c13d | 148 | #if DEVICE_RTC_LSI |
mbed_official | 100:7c647ea3c13d | 149 | return rtc_inited; |
mbed_official | 100:7c647ea3c13d | 150 | #else |
mbed_official | 100:7c647ea3c13d | 151 | if ((RTC->ISR & RTC_ISR_INITS) == RTC_ISR_INITS) { |
mbed_official | 100:7c647ea3c13d | 152 | return 1; |
mbed_official | 100:7c647ea3c13d | 153 | } else { |
mbed_official | 100:7c647ea3c13d | 154 | return 0; |
mbed_official | 100:7c647ea3c13d | 155 | } |
mbed_official | 100:7c647ea3c13d | 156 | #endif |
mbed_official | 100:7c647ea3c13d | 157 | } |
mbed_official | 100:7c647ea3c13d | 158 | |
mbed_official | 100:7c647ea3c13d | 159 | /* |
mbed_official | 100:7c647ea3c13d | 160 | RTC Registers |
mbed_official | 100:7c647ea3c13d | 161 | RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday |
mbed_official | 100:7c647ea3c13d | 162 | RTC_Month 1=january, 2=february, ..., 12=december |
mbed_official | 100:7c647ea3c13d | 163 | RTC_Date day of the month 1-31 |
mbed_official | 100:7c647ea3c13d | 164 | RTC_Year year 0-99 |
mbed_official | 100:7c647ea3c13d | 165 | struct tm |
mbed_official | 100:7c647ea3c13d | 166 | tm_sec seconds after the minute 0-61 |
mbed_official | 100:7c647ea3c13d | 167 | tm_min minutes after the hour 0-59 |
mbed_official | 100:7c647ea3c13d | 168 | tm_hour hours since midnight 0-23 |
mbed_official | 100:7c647ea3c13d | 169 | tm_mday day of the month 1-31 |
mbed_official | 100:7c647ea3c13d | 170 | tm_mon months since January 0-11 |
mbed_official | 100:7c647ea3c13d | 171 | tm_year years since 1900 |
mbed_official | 100:7c647ea3c13d | 172 | tm_wday days since Sunday 0-6 |
mbed_official | 100:7c647ea3c13d | 173 | tm_yday days since January 1 0-365 |
mbed_official | 100:7c647ea3c13d | 174 | tm_isdst Daylight Saving Time flag |
mbed_official | 100:7c647ea3c13d | 175 | */ |
mbed_official | 100:7c647ea3c13d | 176 | time_t rtc_read(void) |
mbed_official | 100:7c647ea3c13d | 177 | { |
mbed_official | 100:7c647ea3c13d | 178 | RTC_DateTypeDef dateStruct; |
mbed_official | 100:7c647ea3c13d | 179 | RTC_TimeTypeDef timeStruct; |
mbed_official | 100:7c647ea3c13d | 180 | struct tm timeinfo; |
mbed_official | 100:7c647ea3c13d | 181 | |
mbed_official | 100:7c647ea3c13d | 182 | RtcHandle.Instance = RTC; |
mbed_official | 100:7c647ea3c13d | 183 | |
mbed_official | 100:7c647ea3c13d | 184 | // Read actual date and time |
mbed_official | 100:7c647ea3c13d | 185 | // Warning: the time must be read first! |
mbed_official | 100:7c647ea3c13d | 186 | HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN); |
mbed_official | 100:7c647ea3c13d | 187 | HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN); |
mbed_official | 100:7c647ea3c13d | 188 | |
mbed_official | 100:7c647ea3c13d | 189 | // Setup a tm structure based on the RTC |
mbed_official | 100:7c647ea3c13d | 190 | timeinfo.tm_wday = dateStruct.WeekDay; |
mbed_official | 100:7c647ea3c13d | 191 | timeinfo.tm_mon = dateStruct.Month - 1; |
mbed_official | 100:7c647ea3c13d | 192 | timeinfo.tm_mday = dateStruct.Date; |
mbed_official | 100:7c647ea3c13d | 193 | timeinfo.tm_year = dateStruct.Year + 100; |
mbed_official | 100:7c647ea3c13d | 194 | timeinfo.tm_hour = timeStruct.Hours; |
mbed_official | 100:7c647ea3c13d | 195 | timeinfo.tm_min = timeStruct.Minutes; |
mbed_official | 100:7c647ea3c13d | 196 | timeinfo.tm_sec = timeStruct.Seconds; |
mbed_official | 113:b3775bf36a83 | 197 | // Daylight Saving Time information is not available |
mbed_official | 113:b3775bf36a83 | 198 | timeinfo.tm_isdst = -1; |
mbed_official | 100:7c647ea3c13d | 199 | |
mbed_official | 100:7c647ea3c13d | 200 | // Convert to timestamp |
mbed_official | 100:7c647ea3c13d | 201 | time_t t = mktime(&timeinfo); |
mbed_official | 100:7c647ea3c13d | 202 | |
mbed_official | 100:7c647ea3c13d | 203 | return t; |
mbed_official | 100:7c647ea3c13d | 204 | } |
mbed_official | 100:7c647ea3c13d | 205 | |
mbed_official | 100:7c647ea3c13d | 206 | void rtc_write(time_t t) |
mbed_official | 100:7c647ea3c13d | 207 | { |
mbed_official | 100:7c647ea3c13d | 208 | RTC_DateTypeDef dateStruct; |
mbed_official | 100:7c647ea3c13d | 209 | RTC_TimeTypeDef timeStruct; |
mbed_official | 100:7c647ea3c13d | 210 | |
mbed_official | 100:7c647ea3c13d | 211 | RtcHandle.Instance = RTC; |
mbed_official | 100:7c647ea3c13d | 212 | |
mbed_official | 100:7c647ea3c13d | 213 | // Convert the time into a tm |
mbed_official | 100:7c647ea3c13d | 214 | struct tm *timeinfo = localtime(&t); |
mbed_official | 100:7c647ea3c13d | 215 | |
mbed_official | 100:7c647ea3c13d | 216 | // Fill RTC structures |
mbed_official | 100:7c647ea3c13d | 217 | dateStruct.WeekDay = timeinfo->tm_wday; |
mbed_official | 100:7c647ea3c13d | 218 | dateStruct.Month = timeinfo->tm_mon + 1; |
mbed_official | 100:7c647ea3c13d | 219 | dateStruct.Date = timeinfo->tm_mday; |
mbed_official | 100:7c647ea3c13d | 220 | dateStruct.Year = timeinfo->tm_year - 100; |
mbed_official | 100:7c647ea3c13d | 221 | timeStruct.Hours = timeinfo->tm_hour; |
mbed_official | 100:7c647ea3c13d | 222 | timeStruct.Minutes = timeinfo->tm_min; |
mbed_official | 100:7c647ea3c13d | 223 | timeStruct.Seconds = timeinfo->tm_sec; |
mbed_official | 100:7c647ea3c13d | 224 | timeStruct.TimeFormat = RTC_HOURFORMAT12_PM; |
mbed_official | 100:7c647ea3c13d | 225 | timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE; |
mbed_official | 100:7c647ea3c13d | 226 | timeStruct.StoreOperation = RTC_STOREOPERATION_RESET; |
mbed_official | 100:7c647ea3c13d | 227 | |
mbed_official | 100:7c647ea3c13d | 228 | // Change the RTC current date/time |
mbed_official | 100:7c647ea3c13d | 229 | HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN); |
mbed_official | 100:7c647ea3c13d | 230 | HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN); |
mbed_official | 100:7c647ea3c13d | 231 | } |
mbed_official | 100:7c647ea3c13d | 232 | |
mbed_official | 100:7c647ea3c13d | 233 | #endif |