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