mirror of https://github.com/ARMmbed/mbed-os.git
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "rtc_api.h"
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#if DEVICE_RTC
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void rtc_init(void)
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{
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// Enables clock for RTC
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LPC_SYSCON->SYSAHBCLKCTRL0 |= (1 << 23);
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// Software reset
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LPC_RTC->CTRL |= 1;
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LPC_RTC->COUNT = 0;
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// Enabled RTC
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LPC_RTC->CTRL |= (1 << 7);
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// clear reset
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LPC_RTC->CTRL &= ~1;
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}
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void rtc_free(void)
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{
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LPC_SYSCON->SYSAHBCLKCTRL0 &= ~(1 << 23);
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LPC_RTC->CTRL &= ~(1 << 7);
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}
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int rtc_isenabled(void)
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{
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return (((LPC_RTC->CTRL) & 0x80) != 0);
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}
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time_t rtc_read(void)
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{
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return (time_t)LPC_RTC->COUNT;
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}
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void rtc_write(time_t t)
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{
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// Disabled RTC
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LPC_RTC->CTRL &= ~(1 << 7);
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// Set count
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LPC_RTC->COUNT = t;
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//Enabled RTC
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LPC_RTC->CTRL |= (1 << 7);
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}
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#endif
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