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targets/hal/TARGET_NXP/TARGET_LPC15XX/rtc_api.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "rtc_api.h"
bogdanm 0:9b334a45a8ff 17
bogdanm 0:9b334a45a8ff 18 #if DEVICE_RTC
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 void rtc_init(void)
bogdanm 0:9b334a45a8ff 21 {
bogdanm 0:9b334a45a8ff 22 // Enables clock for RTC
bogdanm 0:9b334a45a8ff 23 LPC_SYSCON->SYSAHBCLKCTRL0 |= (1 << 23);
bogdanm 0:9b334a45a8ff 24
bogdanm 0:9b334a45a8ff 25 // Software reset
bogdanm 0:9b334a45a8ff 26 LPC_RTC->CTRL |= 1;
bogdanm 0:9b334a45a8ff 27
bogdanm 0:9b334a45a8ff 28 LPC_RTC->COUNT = 0;
bogdanm 0:9b334a45a8ff 29
bogdanm 0:9b334a45a8ff 30 // Enabled RTC
bogdanm 0:9b334a45a8ff 31 LPC_RTC->CTRL |= (1 << 7);
bogdanm 0:9b334a45a8ff 32 // clear reset
bogdanm 0:9b334a45a8ff 33 LPC_RTC->CTRL &= ~1;
bogdanm 0:9b334a45a8ff 34 }
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 void rtc_free(void)
bogdanm 0:9b334a45a8ff 37 {
bogdanm 0:9b334a45a8ff 38 LPC_SYSCON->SYSAHBCLKCTRL0 &= ~(1 << 23);
bogdanm 0:9b334a45a8ff 39 LPC_RTC->CTRL &= ~(1 << 7);
bogdanm 0:9b334a45a8ff 40 }
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 int rtc_isenabled(void)
bogdanm 0:9b334a45a8ff 43 {
bogdanm 0:9b334a45a8ff 44 return (((LPC_RTC->CTRL) & 0x80) != 0);
bogdanm 0:9b334a45a8ff 45 }
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 time_t rtc_read(void)
bogdanm 0:9b334a45a8ff 48 {
bogdanm 0:9b334a45a8ff 49 return (time_t)LPC_RTC->COUNT;
bogdanm 0:9b334a45a8ff 50 }
bogdanm 0:9b334a45a8ff 51
bogdanm 0:9b334a45a8ff 52 void rtc_write(time_t t)
bogdanm 0:9b334a45a8ff 53 {
bogdanm 0:9b334a45a8ff 54 // Disabled RTC
bogdanm 0:9b334a45a8ff 55 LPC_RTC->CTRL &= ~(1 << 7);
bogdanm 0:9b334a45a8ff 56
bogdanm 0:9b334a45a8ff 57 // Set count
bogdanm 0:9b334a45a8ff 58 LPC_RTC->COUNT = t;
bogdanm 0:9b334a45a8ff 59
bogdanm 0:9b334a45a8ff 60 //Enabled RTC
bogdanm 0:9b334a45a8ff 61 LPC_RTC->CTRL |= (1 << 7);
bogdanm 0:9b334a45a8ff 62 }
bogdanm 0:9b334a45a8ff 63
bogdanm 0:9b334a45a8ff 64 #endif