LPCOpen Platform for LPC18XX/43XX microcontrollers
18XX43XX
LPCOpen Platform for the NXP LPC18XX/43XX family of Microcontrollers
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rtc_18xx_43xx.c
Go to the documentation of this file.
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/*
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* @brief LPC18xx/43xx RTC driver
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2012
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* All rights reserved.
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*
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* @par
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* LPC products. This software is supplied "AS IS" without any warranties of
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* any kind, and NXP Semiconductors and its licensor disclaim any and
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* all warranties, express or implied, including all implied warranties of
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* merchantability, fitness for a particular purpose and non-infringement of
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* intellectual property rights. NXP Semiconductors assumes no responsibility
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* or liability for the use of the software, conveys no license or rights under any
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* patent, copyright, mask work right, or any other intellectual property rights in
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* or to any products. NXP Semiconductors reserves the right to make changes
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* in the software without notification. NXP Semiconductors also makes no
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* representation or warranty that such application will be suitable for the
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* specified use without further testing or modification.
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*
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* @par
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors' and its
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* licensor's relevant copyrights in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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*/
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#include "
chip.h
"
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/*****************************************************************************
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* Private types/enumerations/variables
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****************************************************************************/
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/*****************************************************************************
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* Public types/enumerations/variables
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****************************************************************************/
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/*****************************************************************************
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* Private functions
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****************************************************************************/
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/*****************************************************************************
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* Public functions
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****************************************************************************/
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/* Initialize the RTC peripheral */
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void
Chip_RTC_Init
(
LPC_RTC_T
*pRTC)
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{
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Chip_Clock_RTCEnable
();
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/* 2-Second delay after enabling RTC clock */
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LPC_ATIMER
->DOWNCOUNTER = 2048;
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while
(
LPC_ATIMER
->DOWNCOUNTER);
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/* Disable RTC */
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Chip_RTC_Enable
(pRTC,
DISABLE
);
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/* Disable Calibration */
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Chip_RTC_CalibCounterCmd
(pRTC,
DISABLE
);
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/* Reset RTC Clock */
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Chip_RTC_ResetClockTickCounter
(pRTC);
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/* Clear counter increment and alarm interrupt */
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pRTC->
ILR
=
RTC_IRL_RTCCIF
|
RTC_IRL_RTCALF
;
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while
(pRTC->
ILR
!= 0) {}
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/* Clear all register to be default */
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pRTC->
CIIR
= 0x00;
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pRTC->
AMR
= 0xFF;
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pRTC->
CALIBRATION
= 0x00;
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}
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/*De-initialize the RTC peripheral */
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void
Chip_RTC_DeInit
(
LPC_RTC_T
*pRTC)
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{
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pRTC->
CCR
= 0x00;
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}
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/* Reset clock tick counter in the RTC peripheral */
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void
Chip_RTC_ResetClockTickCounter
(
LPC_RTC_T
*pRTC)
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{
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/* Reset RTC clock*/
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pRTC->
CCR
|=
RTC_CCR_CTCRST
;
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while
(!(pRTC->
CCR
&
RTC_CCR_CTCRST
)) {}
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/* Finish resetting RTC clock */
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pRTC->
CCR
= (pRTC->
CCR
& ~
RTC_CCR_CTCRST
) &
RTC_CCR_BITMASK
;
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while
(pRTC->
CCR
&
RTC_CCR_CTCRST
) {}
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}
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/* Start/Stop RTC peripheral */
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void
Chip_RTC_Enable
(
LPC_RTC_T
*pRTC,
FunctionalState
NewState)
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{
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if
(NewState ==
ENABLE
) {
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pRTC->
CCR
|=
RTC_CCR_CLKEN
;
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}
else
{
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pRTC->
CCR
= (pRTC->
CCR
& ~
RTC_CCR_CLKEN
) &
RTC_CCR_BITMASK
;
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}
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}
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/* Enable/Disable Counter increment interrupt for a time type in the RTC peripheral */
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void
Chip_RTC_CntIncrIntConfig
(
LPC_RTC_T
*pRTC, uint32_t cntrMask,
FunctionalState
NewState)
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{
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if
(NewState ==
ENABLE
) {
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pRTC->
CIIR
|= cntrMask;
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}
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else
{
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pRTC->
CIIR
&= (~cntrMask) &
RTC_AMR_CIIR_BITMASK
;
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while
(pRTC->
CIIR
& cntrMask) {}
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}
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}
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/* Enable/Disable Alarm interrupt for a time type in the RTC peripheral */
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void
Chip_RTC_AlarmIntConfig
(
LPC_RTC_T
*pRTC, uint32_t alarmMask,
FunctionalState
NewState)
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{
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if
(NewState ==
ENABLE
) {
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pRTC->
AMR
&= (~alarmMask) &
RTC_AMR_CIIR_BITMASK
;
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}
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else
{
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pRTC->
AMR
|= (alarmMask);
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while
((pRTC->
AMR
& alarmMask) == 0) {}
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}
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}
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/* Set full time in the RTC peripheral */
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void
Chip_RTC_SetFullTime
(
LPC_RTC_T
*pRTC,
RTC_TIME_T
*pFullTime)
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{
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RTC_TIMEINDEX_T
i;
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uint32_t ccr_val = pRTC->
CCR
;
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/* Temporarily disable */
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if
(ccr_val &
RTC_CCR_CLKEN
) {
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pRTC->
CCR
= ccr_val & (~RTC_CCR_CLKEN) &
RTC_CCR_BITMASK
;
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}
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/* Date time setting */
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for
(i =
RTC_TIMETYPE_SECOND
; i <
RTC_TIMETYPE_LAST
; i++) {
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pRTC->
TIME
[i] = pFullTime->
time
[i];
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}
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/* Restore to old setting */
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pRTC->
CCR
= ccr_val;
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}
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/* Get full time from the RTC peripheral */
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void
Chip_RTC_GetFullTime
(
LPC_RTC_T
*pRTC,
RTC_TIME_T
*pFullTime)
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{
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RTC_TIMEINDEX_T
i;
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uint32_t secs = 0xFF;
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/* Read full time, but verify second tick didn't change during the read. If
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it did, re-read the time again so it will be consistent across all fields. */
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while
(secs != pRTC->
TIME
[
RTC_TIMETYPE_SECOND
]) {
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secs = pFullTime->
time
[
RTC_TIMETYPE_SECOND
] = pRTC->
TIME
[
RTC_TIMETYPE_SECOND
];
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for
(i =
RTC_TIMETYPE_MINUTE
; i <
RTC_TIMETYPE_LAST
; i++) {
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pFullTime->
time
[i] = pRTC->
TIME
[i];
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}
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}
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}
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/* Set full alarm time in the RTC peripheral */
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void
Chip_RTC_SetFullAlarmTime
(
LPC_RTC_T
*pRTC,
RTC_TIME_T
*pFullTime)
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{
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RTC_TIMEINDEX_T
i;
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for
(i =
RTC_TIMETYPE_SECOND
; i <
RTC_TIMETYPE_LAST
; i++) {
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pRTC->
ALRM
[i] = pFullTime->
time
[i];
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}
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}
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/* Get full alarm time in the RTC peripheral */
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void
Chip_RTC_GetFullAlarmTime
(
LPC_RTC_T
*pRTC,
RTC_TIME_T
*pFullTime)
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{
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RTC_TIMEINDEX_T
i;
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for
(i =
RTC_TIMETYPE_SECOND
; i <
RTC_TIMETYPE_LAST
; i++) {
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pFullTime->
time
[i] = pRTC->
ALRM
[i];
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}
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}
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/* Enable/Disable calibration counter in the RTC peripheral */
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void
Chip_RTC_CalibCounterCmd
(
LPC_RTC_T
*pRTC,
FunctionalState
NewState)
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{
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if
(NewState ==
ENABLE
) {
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do
{
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pRTC->
CCR
&= (~
RTC_CCR_CCALEN
) &
RTC_CCR_BITMASK
;
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}
while
(pRTC->
CCR
&
RTC_CCR_CCALEN
);
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}
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else
{
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pRTC->
CCR
|=
RTC_CCR_CCALEN
;
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}
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}
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#if RTC_EV_SUPPORT
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/* Get first timestamp value */
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void
Chip_RTC_EV_GetFirstTimeStamp
(
LPC_RTC_T
*pRTC,
RTC_EV_CHANNEL_T
ch,
RTC_EV_TIMESTAMP_T
*pTimeStamp)
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{
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pTimeStamp->
sec
=
RTC_ER_TIMESTAMP_SEC
(pRTC->
ERFIRSTSTAMP
[ch]);
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pTimeStamp->
min
=
RTC_ER_TIMESTAMP_MIN
(pRTC->
ERFIRSTSTAMP
[ch]);
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pTimeStamp->
hour
=
RTC_ER_TIMESTAMP_HOUR
(pRTC->
ERFIRSTSTAMP
[ch]);
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pTimeStamp->
dayofyear
=
RTC_ER_TIMESTAMP_DOY
(pRTC->
ERFIRSTSTAMP
[ch]);
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}
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/* Get last timestamp value */
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void
Chip_RTC_EV_GetLastTimeStamp
(
LPC_RTC_T
*pRTC,
RTC_EV_CHANNEL_T
ch,
RTC_EV_TIMESTAMP_T
*pTimeStamp)
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{
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pTimeStamp->
sec
=
RTC_ER_TIMESTAMP_SEC
(pRTC->
ERLASTSTAMP
[ch]);
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pTimeStamp->
min
=
RTC_ER_TIMESTAMP_MIN
(pRTC->
ERLASTSTAMP
[ch]);
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pTimeStamp->
hour
=
RTC_ER_TIMESTAMP_HOUR
(pRTC->
ERLASTSTAMP
[ch]);
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pTimeStamp->
dayofyear
=
RTC_ER_TIMESTAMP_DOY
(pRTC->
ERLASTSTAMP
[ch]);
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}
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#endif
/*RTC_EV_SUPPORT*/
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