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120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
/**
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* @file
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*
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* @ingroup RTEMSBSPsARMLPC176X
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*
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* @brief RTC configuration.
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*/
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/*
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* Copyright (c) 2008 embedded brains GmbH. All rights reserved.
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <libchip/rtc.h>
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#include <bsp/io.h>
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#define LPC176X_RTC_NUMBER 1U
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void bsp_rtc_initialize( void );
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int bsp_rtc_get_time( rtems_time_of_day *tod );
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int bsp_rtc_set_time( const rtems_time_of_day *tod );
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bool bsp_rtc_probe( void );
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/**
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* @brief Initialize the rtc device.
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*/
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void bsp_rtc_initialize( void )
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{
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/* Enable module power */
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lpc176x_module_enable( LPC176X_MODULE_RTC, LPC176X_MODULE_PCLK_DEFAULT );
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/* Enable the RTC and use external clock */
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RTC_CCR = RTC_CCR_CLKEN | RTC_CCR_CLKSRC;
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/* Disable interrupts */
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RTC_CIIR = 0U;
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RTC_CISS = 0U;
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RTC_AMR = 0xFFU;
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/* Clear interrupts */
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RTC_ILR = RTC_ILR_RTCCIF | RTC_ILR_RTCALF | RTC_ILR_RTSSF;
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}
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/**
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* @brief Gets the information according to the current time.
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*
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* @param tod Value to be modified.
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* @return 0
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*/
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int bsp_rtc_get_time( rtems_time_of_day *tod )
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{
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tod->ticks = 0;
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tod->second = RTC_SEC;
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tod->minute = RTC_MIN;
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tod->hour = RTC_HOUR;
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tod->day = RTC_DOM;
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tod->month = RTC_MONTH;
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tod->year = RTC_YEAR;
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return 0;
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}
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/**
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* @brief Sets the information according to the current time.
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*
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* @param tod Value to get the new information.
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* @return 0
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*/
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int bsp_rtc_set_time( const rtems_time_of_day *tod )
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{
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RTC_SEC = tod->second;
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RTC_MIN = tod->minute;
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RTC_HOUR = tod->hour;
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RTC_DOM = tod->day;
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RTC_MONTH = tod->month;
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RTC_YEAR = tod->year;
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return 0;
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}
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/**
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* @brief Used to probe. At the moment is not used.
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*
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* @return true.
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*/
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bool bsp_rtc_probe( void )
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{
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return true;
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}
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/**
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* @brief Represents the real time clock options.
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*/
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const rtc_fns lpc176x_rtc_ops = {
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.deviceInitialize = (void *) bsp_rtc_initialize,
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.deviceGetTime = (void *) bsp_rtc_get_time,
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.deviceSetTime = (void *) bsp_rtc_set_time
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};
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size_t RTC_Count = LPC176X_RTC_NUMBER;
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/**
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* @brief Table to describes the rtc device.
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*/
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rtc_tbl RTC_Table[ LPC176X_RTC_NUMBER ] = {
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{
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.sDeviceName = "/dev/rtc",
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.deviceType = RTC_CUSTOM,
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.pDeviceFns = &lpc176x_rtc_ops,
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.deviceProbe = (void *) bsp_rtc_probe,
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.pDeviceParams = NULL,
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.ulCtrlPort1 = 0,
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.ulDataPort = 0,
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.getRegister = NULL,
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.setRegister = NULL
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}
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};
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