mbed library sources
Fork of mbed-src by
Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/rtc_api.c
- Revision:
- 429:cc5da43e7bf6
- Parent:
- 428:4ddf7f7eabbb
- Child:
- 430:d406b7919023
--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/rtc_api.c Mon Dec 08 07:30:07 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,203 +0,0 @@ -/* mbed Microcontroller Library - ******************************************************************************* - * Copyright (c) 2014, STMicroelectronics - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * 3. Neither the name of STMicroelectronics nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER - * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - ******************************************************************************* - */ -#include "rtc_api.h" - -#if DEVICE_RTC - -#include "mbed_error.h" - -static int rtc_inited = 0; - -static RTC_HandleTypeDef RtcHandle; - -void rtc_init(void) -{ - RCC_OscInitTypeDef RCC_OscInitStruct; - uint32_t rtc_freq = 0; - - if (rtc_inited) return; - rtc_inited = 1; - - RtcHandle.Instance = RTC; - - // Enable Power clock - __PWR_CLK_ENABLE(); - - // Enable access to Backup domain - HAL_PWR_EnableBkUpAccess(); - - // Reset Backup domain - __HAL_RCC_BACKUPRESET_FORCE(); - __HAL_RCC_BACKUPRESET_RELEASE(); - - // Enable LSE Oscillator - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; /* Mandatory, otherwise the PLL is reconfigured! */ - RCC_OscInitStruct.LSEState = RCC_LSE_ON; /* External 32.768 kHz clock on OSC_IN/OSC_OUT */ - if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { - // Connect LSE to RTC - __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE); - __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE); - rtc_freq = LSE_VALUE; - } else { - // Enable LSI clock - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE; - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured! - RCC_OscInitStruct.LSEState = RCC_LSE_OFF; - RCC_OscInitStruct.LSIState = RCC_LSI_ON; - if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { - error("RTC error: LSI clock initialization failed."); - } - // Connect LSI to RTC - __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI); - __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI); - // [TODO] This value is LSI typical value. To be measured precisely using a timer input capture - rtc_freq = LSI_VALUE; - } - - // Enable RTC - __HAL_RCC_RTC_ENABLE(); - - RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24; - RtcHandle.Init.AsynchPrediv = 127; - RtcHandle.Init.SynchPrediv = (rtc_freq / 128) - 1; - RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE; - RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; - RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; - - if (HAL_RTC_Init(&RtcHandle) != HAL_OK) { - error("RTC error: RTC initialization failed."); - } -} - -void rtc_free(void) -{ - // Enable Power clock - __PWR_CLK_ENABLE(); - - // Enable access to Backup domain - HAL_PWR_EnableBkUpAccess(); - - // Reset Backup domain - __HAL_RCC_BACKUPRESET_FORCE(); - __HAL_RCC_BACKUPRESET_RELEASE(); - - // Disable access to Backup domain - HAL_PWR_DisableBkUpAccess(); - - // Disable LSI and LSE clocks - RCC_OscInitTypeDef RCC_OscInitStruct; - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE; - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; - RCC_OscInitStruct.LSIState = RCC_LSI_OFF; - RCC_OscInitStruct.LSEState = RCC_LSE_OFF; - HAL_RCC_OscConfig(&RCC_OscInitStruct); - - rtc_inited = 0; -} - -int rtc_isenabled(void) -{ - return rtc_inited; -} - -/* - RTC Registers - RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday - RTC_Month 1=january, 2=february, ..., 12=december - RTC_Date day of the month 1-31 - RTC_Year year 0-99 - struct tm - tm_sec seconds after the minute 0-61 - tm_min minutes after the hour 0-59 - tm_hour hours since midnight 0-23 - tm_mday day of the month 1-31 - tm_mon months since January 0-11 - tm_year years since 1900 - tm_wday days since Sunday 0-6 - tm_yday days since January 1 0-365 - tm_isdst Daylight Saving Time flag -*/ -time_t rtc_read(void) -{ - RTC_DateTypeDef dateStruct; - RTC_TimeTypeDef timeStruct; - struct tm timeinfo; - - RtcHandle.Instance = RTC; - - // Read actual date and time - // Warning: the time must be read first! - HAL_RTC_GetTime(&RtcHandle, &timeStruct, FORMAT_BIN); - HAL_RTC_GetDate(&RtcHandle, &dateStruct, FORMAT_BIN); - - // Setup a tm structure based on the RTC - timeinfo.tm_wday = dateStruct.WeekDay; - timeinfo.tm_mon = dateStruct.Month - 1; - timeinfo.tm_mday = dateStruct.Date; - timeinfo.tm_year = dateStruct.Year + 100; - timeinfo.tm_hour = timeStruct.Hours; - timeinfo.tm_min = timeStruct.Minutes; - timeinfo.tm_sec = timeStruct.Seconds; - - // Convert to timestamp - time_t t = mktime(&timeinfo); - - return t; -} - -void rtc_write(time_t t) -{ - RTC_DateTypeDef dateStruct; - RTC_TimeTypeDef timeStruct; - - RtcHandle.Instance = RTC; - - // Convert the time into a tm - struct tm *timeinfo = localtime(&t); - - // Fill RTC structures - dateStruct.WeekDay = timeinfo->tm_wday; - dateStruct.Month = timeinfo->tm_mon + 1; - dateStruct.Date = timeinfo->tm_mday; - dateStruct.Year = timeinfo->tm_year - 100; - timeStruct.Hours = timeinfo->tm_hour; - timeStruct.Minutes = timeinfo->tm_min; - timeStruct.Seconds = timeinfo->tm_sec; - timeStruct.TimeFormat = RTC_HOURFORMAT12_PM; - timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE; - timeStruct.StoreOperation = RTC_STOREOPERATION_RESET; - - // Change the RTC current date/time - HAL_RTC_SetDate(&RtcHandle, &dateStruct, FORMAT_BIN); - HAL_RTC_SetTime(&RtcHandle, &timeStruct, FORMAT_BIN); -} - -#endif