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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSBSPsARMLPC176X
*
* @brief RTC configuration.
*/
/*
* Copyright (c) 2008 embedded brains GmbH. All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <libchip/rtc.h>
#include <bsp/io.h>
#define LPC176X_RTC_NUMBER 1U
void bsp_rtc_initialize( void );
int bsp_rtc_get_time( rtems_time_of_day *tod );
int bsp_rtc_set_time( const rtems_time_of_day *tod );
bool bsp_rtc_probe( void );
/**
* @brief Initialize the rtc device.
*/
void bsp_rtc_initialize( void )
{
/* Enable module power */
lpc176x_module_enable( LPC176X_MODULE_RTC, LPC176X_MODULE_PCLK_DEFAULT );
/* Enable the RTC and use external clock */
RTC_CCR = RTC_CCR_CLKEN | RTC_CCR_CLKSRC;
/* Disable interrupts */
RTC_CIIR = 0U;
RTC_CISS = 0U;
RTC_AMR = 0xFFU;
/* Clear interrupts */
RTC_ILR = RTC_ILR_RTCCIF | RTC_ILR_RTCALF | RTC_ILR_RTSSF;
}
/**
* @brief Gets the information according to the current time.
*
* @param tod Value to be modified.
* @return 0
*/
int bsp_rtc_get_time( rtems_time_of_day *tod )
{
tod->ticks = 0;
tod->second = RTC_SEC;
tod->minute = RTC_MIN;
tod->hour = RTC_HOUR;
tod->day = RTC_DOM;
tod->month = RTC_MONTH;
tod->year = RTC_YEAR;
return 0;
}
/**
* @brief Sets the information according to the current time.
*
* @param tod Value to get the new information.
* @return 0
*/
int bsp_rtc_set_time( const rtems_time_of_day *tod )
{
RTC_SEC = tod->second;
RTC_MIN = tod->minute;
RTC_HOUR = tod->hour;
RTC_DOM = tod->day;
RTC_MONTH = tod->month;
RTC_YEAR = tod->year;
return 0;
}
/**
* @brief Used to probe. At the moment is not used.
*
* @return true.
*/
bool bsp_rtc_probe( void )
{
return true;
}
/**
* @brief Represents the real time clock options.
*/
const rtc_fns lpc176x_rtc_ops = {
.deviceInitialize = (void *) bsp_rtc_initialize,
.deviceGetTime = (void *) bsp_rtc_get_time,
.deviceSetTime = (void *) bsp_rtc_set_time
};
size_t RTC_Count = LPC176X_RTC_NUMBER;
/**
* @brief Table to describes the rtc device.
*/
rtc_tbl RTC_Table[ LPC176X_RTC_NUMBER ] = {
{
.sDeviceName = "/dev/rtc",
.deviceType = RTC_CUSTOM,
.pDeviceFns = &lpc176x_rtc_ops,
.deviceProbe = (void *) bsp_rtc_probe,
.pDeviceParams = NULL,
.ulCtrlPort1 = 0,
.ulDataPort = 0,
.getRegister = NULL,
.setRegister = NULL
}
};
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