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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

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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_DISCO_F100RB/rtc_api.c@268:402bcc0c870b, 2014-07-29 (annotated)

Committer:
mbed_official
Date:
Tue Jul 29 19:00:07 2014 +0100
Revision:
268:402bcc0c870b
Parent:
126:549ba18ddd81
Child:
497:d54623194236
Synchronized with git revision 490d1a6606b3138f165c5edf2f2370ca616587c0



Full URL: https://github.com/mbedmicro/mbed/commit/490d1a6606b3138f165c5edf2f2370ca616587c0/



[LPC1114] Sleep fix + some device.h settings

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 126:549ba18ddd81 1 /* mbed Microcontroller Library
mbed_official 126:549ba18ddd81 2 *******************************************************************************
mbed_official 126:549ba18ddd81 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 126:549ba18ddd81 4 * All rights reserved.
mbed_official 126:549ba18ddd81 5 *
mbed_official 126:549ba18ddd81 6 * Redistribution and use in source and binary forms, with or without
mbed_official 126:549ba18ddd81 7 * modification, are permitted provided that the following conditions are met:
mbed_official 126:549ba18ddd81 8 *
mbed_official 126:549ba18ddd81 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 126:549ba18ddd81 10 * this list of conditions and the following disclaimer.
mbed_official 126:549ba18ddd81 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 126:549ba18ddd81 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 126:549ba18ddd81 13 * and/or other materials provided with the distribution.
mbed_official 126:549ba18ddd81 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 126:549ba18ddd81 15 * may be used to endorse or promote products derived from this software
mbed_official 126:549ba18ddd81 16 * without specific prior written permission.
mbed_official 126:549ba18ddd81 17 *
mbed_official 126:549ba18ddd81 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 126:549ba18ddd81 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 126:549ba18ddd81 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 126:549ba18ddd81 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 126:549ba18ddd81 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 126:549ba18ddd81 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 126:549ba18ddd81 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 126:549ba18ddd81 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 126:549ba18ddd81 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 126:549ba18ddd81 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 126:549ba18ddd81 28 *******************************************************************************
mbed_official 126:549ba18ddd81 29 */
mbed_official 126:549ba18ddd81 30 #include "rtc_api.h"
mbed_official 126:549ba18ddd81 31
mbed_official 126:549ba18ddd81 32 static int rtc_inited = 0;
mbed_official 126:549ba18ddd81 33
mbed_official 126:549ba18ddd81 34 void rtc_init(void) {
mbed_official 126:549ba18ddd81 35 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); // Enable PWR and Backup clock
mbed_official 126:549ba18ddd81 36
mbed_official 126:549ba18ddd81 37 PWR_BackupAccessCmd(ENABLE); // Allow access to Backup Domain
mbed_official 126:549ba18ddd81 38
mbed_official 126:549ba18ddd81 39 BKP_DeInit(); // Reset Backup Domain
mbed_official 126:549ba18ddd81 40
mbed_official 126:549ba18ddd81 41 // Uncomment these lines if you use the LSE
mbed_official 126:549ba18ddd81 42 // Enable LSE and wait till it's ready
mbed_official 126:549ba18ddd81 43 //RCC_LSEConfig(RCC_LSE_ON);
mbed_official 126:549ba18ddd81 44 //while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {}
mbed_official 126:549ba18ddd81 45 //RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); // Select LSE as RTC Clock Source
mbed_official 126:549ba18ddd81 46
mbed_official 126:549ba18ddd81 47 // Uncomment these lines if you use the LSI
mbed_official 126:549ba18ddd81 48 // Enable LSI and wait till it's ready
mbed_official 126:549ba18ddd81 49 RCC_LSICmd(ENABLE);
mbed_official 126:549ba18ddd81 50 while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {}
mbed_official 126:549ba18ddd81 51 RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); // Select LSI as RTC Clock Source
mbed_official 126:549ba18ddd81 52
mbed_official 126:549ba18ddd81 53 RCC_RTCCLKCmd(ENABLE); // Enable RTC Clock
mbed_official 126:549ba18ddd81 54
mbed_official 126:549ba18ddd81 55 RTC_WaitForSynchro(); // Wait for RTC registers synchronization
mbed_official 126:549ba18ddd81 56
mbed_official 126:549ba18ddd81 57 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 126:549ba18ddd81 58
mbed_official 126:549ba18ddd81 59 // Set RTC period to 1 sec
mbed_official 126:549ba18ddd81 60 // For LSE: prescaler = RTCCLK/RTC period = 32768Hz/1Hz = 32768
mbed_official 126:549ba18ddd81 61 // For LSI: prescaler = RTCCLK/RTC period = 40000Hz/1Hz = 40000
mbed_official 126:549ba18ddd81 62 RTC_SetPrescaler(39999);
mbed_official 126:549ba18ddd81 63
mbed_official 126:549ba18ddd81 64 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 126:549ba18ddd81 65
mbed_official 126:549ba18ddd81 66 rtc_inited = 1;
mbed_official 126:549ba18ddd81 67 }
mbed_official 126:549ba18ddd81 68
mbed_official 126:549ba18ddd81 69 void rtc_free(void) {
mbed_official 126:549ba18ddd81 70 RCC_DeInit(); // Resets the RCC clock configuration to the default reset state
mbed_official 126:549ba18ddd81 71 rtc_inited = 0;
mbed_official 126:549ba18ddd81 72 }
mbed_official 126:549ba18ddd81 73
mbed_official 126:549ba18ddd81 74 int rtc_isenabled(void) {
mbed_official 126:549ba18ddd81 75 return rtc_inited;
mbed_official 126:549ba18ddd81 76 }
mbed_official 126:549ba18ddd81 77
mbed_official 126:549ba18ddd81 78 time_t rtc_read(void) {
mbed_official 126:549ba18ddd81 79 return (time_t)RTC_GetCounter();
mbed_official 126:549ba18ddd81 80 }
mbed_official 126:549ba18ddd81 81
mbed_official 126:549ba18ddd81 82 void rtc_write(time_t t) {
mbed_official 126:549ba18ddd81 83 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 126:549ba18ddd81 84 RTC_SetCounter(t); // Change the current time
mbed_official 126:549ba18ddd81 85 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 126:549ba18ddd81 86 }