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_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
Child:
174:8bb9f3a33240
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 }