Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_NXP/TARGET_LPC15XX/rtc_api.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #include "rtc_api.h"
elessair 0:f269e3021894 17
elessair 0:f269e3021894 18 #if DEVICE_RTC
elessair 0:f269e3021894 19
elessair 0:f269e3021894 20 void rtc_init(void)
elessair 0:f269e3021894 21 {
elessair 0:f269e3021894 22 // Enables clock for RTC
elessair 0:f269e3021894 23 LPC_SYSCON->SYSAHBCLKCTRL0 |= (1 << 23);
elessair 0:f269e3021894 24
elessair 0:f269e3021894 25 // Software reset
elessair 0:f269e3021894 26 LPC_RTC->CTRL |= 1;
elessair 0:f269e3021894 27
elessair 0:f269e3021894 28 LPC_RTC->COUNT = 0;
elessair 0:f269e3021894 29
elessair 0:f269e3021894 30 // Enabled RTC
elessair 0:f269e3021894 31 LPC_RTC->CTRL |= (1 << 7);
elessair 0:f269e3021894 32 // clear reset
elessair 0:f269e3021894 33 LPC_RTC->CTRL &= ~1;
elessair 0:f269e3021894 34 }
elessair 0:f269e3021894 35
elessair 0:f269e3021894 36 void rtc_free(void)
elessair 0:f269e3021894 37 {
elessair 0:f269e3021894 38 LPC_SYSCON->SYSAHBCLKCTRL0 &= ~(1 << 23);
elessair 0:f269e3021894 39 LPC_RTC->CTRL &= ~(1 << 7);
elessair 0:f269e3021894 40 }
elessair 0:f269e3021894 41
elessair 0:f269e3021894 42 int rtc_isenabled(void)
elessair 0:f269e3021894 43 {
elessair 0:f269e3021894 44 return (((LPC_RTC->CTRL) & 0x80) != 0);
elessair 0:f269e3021894 45 }
elessair 0:f269e3021894 46
elessair 0:f269e3021894 47 time_t rtc_read(void)
elessair 0:f269e3021894 48 {
elessair 0:f269e3021894 49 return (time_t)LPC_RTC->COUNT;
elessair 0:f269e3021894 50 }
elessair 0:f269e3021894 51
elessair 0:f269e3021894 52 void rtc_write(time_t t)
elessair 0:f269e3021894 53 {
elessair 0:f269e3021894 54 // Disabled RTC
elessair 0:f269e3021894 55 LPC_RTC->CTRL &= ~(1 << 7);
elessair 0:f269e3021894 56
elessair 0:f269e3021894 57 // Set count
elessair 0:f269e3021894 58 LPC_RTC->COUNT = t;
elessair 0:f269e3021894 59
elessair 0:f269e3021894 60 //Enabled RTC
elessair 0:f269e3021894 61 LPC_RTC->CTRL |= (1 << 7);
elessair 0:f269e3021894 62 }
elessair 0:f269e3021894 63
elessair 0:f269e3021894 64 #endif