SDK Development / mbed-src

mbed SDK library sources

Fork of mbed-src by mbed official

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_F103RB/rtc_api.c@70:c1fbde68b492, 2014-01-07 (annotated)

Committer:
mbed_official
Date:
Tue Jan 07 11:00:05 2014 +0000
Revision:
70:c1fbde68b492
Parent:
62:7731d679ae64 
Synchronized with git revision 3f438a307904431f2782db3c8fa49946b9fc1d85



Full URL: https://github.com/mbedmicro/mbed/commit/3f438a307904431f2782db3c8fa49946b9fc1d85/



[NUCLEO_F103RB] license text changed + sleep hal updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 60:142c6c6f5949 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 *******************************************************************************
mbed_official 70:c1fbde68b492 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 4 * All rights reserved.
mbed_official 60:142c6c6f5949 5 *
mbed_official 70:c1fbde68b492 6 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 7 * modification, are permitted provided that the following conditions are met:
mbed_official 60:142c6c6f5949 8 *
mbed_official 70:c1fbde68b492 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 10 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 13 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 15 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 16 * without specific prior written permission.
mbed_official 60:142c6c6f5949 17 *
mbed_official 70:c1fbde68b492 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 70:c1fbde68b492 28 *******************************************************************************
mbed_official 60:142c6c6f5949 29 */
mbed_official 60:142c6c6f5949 30 #include "rtc_api.h"
mbed_official 60:142c6c6f5949 31
mbed_official 60:142c6c6f5949 32 static int rtc_inited = 0;
mbed_official 60:142c6c6f5949 33
mbed_official 60:142c6c6f5949 34 void rtc_init(void) {
mbed_official 60:142c6c6f5949 35 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); // Enable PWR and Backup clock
mbed_official 60:142c6c6f5949 36
mbed_official 60:142c6c6f5949 37 PWR_BackupAccessCmd(ENABLE); // Allow access to Backup Domain
mbed_official 60:142c6c6f5949 38
mbed_official 60:142c6c6f5949 39 BKP_DeInit(); // Reset Backup Domain
mbed_official 60:142c6c6f5949 40
mbed_official 62:7731d679ae64 41 // Uncomment these lines if you use the LSE
mbed_official 60:142c6c6f5949 42 // Enable LSE and wait till it's ready
mbed_official 62:7731d679ae64 43 //RCC_LSEConfig(RCC_LSE_ON);
mbed_official 62:7731d679ae64 44 //while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {}
mbed_official 62:7731d679ae64 45 //RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); // Select LSE as RTC Clock Source
mbed_official 60:142c6c6f5949 46
mbed_official 62:7731d679ae64 47 // Uncomment these lines if you use the LSI
mbed_official 62:7731d679ae64 48 // Enable LSI and wait till it's ready
mbed_official 62:7731d679ae64 49 RCC_LSICmd(ENABLE);
mbed_official 62:7731d679ae64 50 while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {}
mbed_official 62:7731d679ae64 51 RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); // Select LSI as RTC Clock Source
mbed_official 62:7731d679ae64 52
mbed_official 60:142c6c6f5949 53 RCC_RTCCLKCmd(ENABLE); // Enable RTC Clock
mbed_official 60:142c6c6f5949 54
mbed_official 60:142c6c6f5949 55 RTC_WaitForSynchro(); // Wait for RTC registers synchronization
mbed_official 60:142c6c6f5949 56
mbed_official 60:142c6c6f5949 57 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 60:142c6c6f5949 58
mbed_official 60:142c6c6f5949 59 // Set RTC period to 1 sec
mbed_official 62:7731d679ae64 60 // For LSE: prescaler = RTCCLK/RTC period = 32768Hz/1Hz = 32768
mbed_official 62:7731d679ae64 61 // For LSI: prescaler = RTCCLK/RTC period = 40000Hz/1Hz = 40000
mbed_official 62:7731d679ae64 62 RTC_SetPrescaler(39999);
mbed_official 60:142c6c6f5949 63
mbed_official 60:142c6c6f5949 64 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 60:142c6c6f5949 65
mbed_official 60:142c6c6f5949 66 rtc_inited = 1;
mbed_official 60:142c6c6f5949 67 }
mbed_official 60:142c6c6f5949 68
mbed_official 60:142c6c6f5949 69 void rtc_free(void) {
mbed_official 60:142c6c6f5949 70 RCC_DeInit(); // Resets the RCC clock configuration to the default reset state
mbed_official 60:142c6c6f5949 71 rtc_inited = 0;
mbed_official 60:142c6c6f5949 72 }
mbed_official 60:142c6c6f5949 73
mbed_official 60:142c6c6f5949 74 int rtc_isenabled(void) {
mbed_official 60:142c6c6f5949 75 return rtc_inited;
mbed_official 60:142c6c6f5949 76 }
mbed_official 60:142c6c6f5949 77
mbed_official 60:142c6c6f5949 78 time_t rtc_read(void) {
mbed_official 60:142c6c6f5949 79 return (time_t)RTC_GetCounter();
mbed_official 60:142c6c6f5949 80 }
mbed_official 60:142c6c6f5949 81
mbed_official 60:142c6c6f5949 82 void rtc_write(time_t t) {
mbed_official 60:142c6c6f5949 83 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 60:142c6c6f5949 84 RTC_SetCounter(t); // Change the current time
mbed_official 60:142c6c6f5949 85 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 60:142c6c6f5949 86 }