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@60:142c6c6f5949, 2013-12-17 (annotated)

Committer:
mbed_official
Date:
Tue Dec 17 08:45:10 2013 +0000
Revision:
60:142c6c6f5949
Child:
62:7731d679ae64
Synchronized with git revision 572b22395f1ebb513f4fbd423214cb39a18dc58b



Full URL: https://github.com/mbedmicro/mbed/commit/572b22395f1ebb513f4fbd423214cb39a18dc58b/



[NUCLEO_F103RB] InterruptIn, Sleep, RTC added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 60:142c6c6f5949 1 /* mbed Microcontroller Library
mbed_official 60:142c6c6f5949 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 60:142c6c6f5949 3 *
mbed_official 60:142c6c6f5949 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 60:142c6c6f5949 5 * you may not use this file except in compliance with the License.
mbed_official 60:142c6c6f5949 6 * You may obtain a copy of the License at
mbed_official 60:142c6c6f5949 7 *
mbed_official 60:142c6c6f5949 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 60:142c6c6f5949 9 *
mbed_official 60:142c6c6f5949 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 60:142c6c6f5949 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 60:142c6c6f5949 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 60:142c6c6f5949 13 * See the License for the specific language governing permissions and
mbed_official 60:142c6c6f5949 14 * limitations under the License.
mbed_official 60:142c6c6f5949 15 */
mbed_official 60:142c6c6f5949 16 #include "rtc_api.h"
mbed_official 60:142c6c6f5949 17
mbed_official 60:142c6c6f5949 18 static int rtc_inited = 0;
mbed_official 60:142c6c6f5949 19
mbed_official 60:142c6c6f5949 20 void rtc_init(void) {
mbed_official 60:142c6c6f5949 21 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); // Enable PWR and Backup clock
mbed_official 60:142c6c6f5949 22
mbed_official 60:142c6c6f5949 23 PWR_BackupAccessCmd(ENABLE); // Allow access to Backup Domain
mbed_official 60:142c6c6f5949 24
mbed_official 60:142c6c6f5949 25 BKP_DeInit(); // Reset Backup Domain
mbed_official 60:142c6c6f5949 26
mbed_official 60:142c6c6f5949 27 // Enable LSE and wait till it's ready
mbed_official 60:142c6c6f5949 28 RCC_LSEConfig(RCC_LSE_ON);
mbed_official 60:142c6c6f5949 29 while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {}
mbed_official 60:142c6c6f5949 30
mbed_official 60:142c6c6f5949 31 RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); // Select LSE as RTC Clock Source
mbed_official 60:142c6c6f5949 32
mbed_official 60:142c6c6f5949 33 RCC_RTCCLKCmd(ENABLE); // Enable RTC Clock
mbed_official 60:142c6c6f5949 34
mbed_official 60:142c6c6f5949 35 RTC_WaitForSynchro(); // Wait for RTC registers synchronization
mbed_official 60:142c6c6f5949 36
mbed_official 60:142c6c6f5949 37 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 60:142c6c6f5949 38
mbed_official 60:142c6c6f5949 39 // Set RTC period to 1 sec
mbed_official 60:142c6c6f5949 40 // RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1)
mbed_official 60:142c6c6f5949 41 RTC_SetPrescaler(32767);
mbed_official 60:142c6c6f5949 42
mbed_official 60:142c6c6f5949 43 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 60:142c6c6f5949 44
mbed_official 60:142c6c6f5949 45 rtc_inited = 1;
mbed_official 60:142c6c6f5949 46 }
mbed_official 60:142c6c6f5949 47
mbed_official 60:142c6c6f5949 48 void rtc_free(void) {
mbed_official 60:142c6c6f5949 49 RCC_DeInit(); // Resets the RCC clock configuration to the default reset state
mbed_official 60:142c6c6f5949 50 rtc_inited = 0;
mbed_official 60:142c6c6f5949 51 }
mbed_official 60:142c6c6f5949 52
mbed_official 60:142c6c6f5949 53 int rtc_isenabled(void) {
mbed_official 60:142c6c6f5949 54 return rtc_inited;
mbed_official 60:142c6c6f5949 55 }
mbed_official 60:142c6c6f5949 56
mbed_official 60:142c6c6f5949 57 time_t rtc_read(void) {
mbed_official 60:142c6c6f5949 58 return (time_t)RTC_GetCounter();
mbed_official 60:142c6c6f5949 59 }
mbed_official 60:142c6c6f5949 60
mbed_official 60:142c6c6f5949 61 void rtc_write(time_t t) {
mbed_official 60:142c6c6f5949 62 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 60:142c6c6f5949 63 RTC_SetCounter(t); // Change the current time
mbed_official 60:142c6c6f5949 64 RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
mbed_official 60:142c6c6f5949 65 }