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atimer.c
Go to the documentation of this file.
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/*
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* @brief ATIMER example
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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 "board.h"
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/*****************************************************************************
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* Private types/enumerations/variables
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****************************************************************************/
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#define PresetCount (CRYSTAL_32K_FREQ_IN / 32)
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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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/* Clearn interrupts */
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static
void
ATIMER_ClearInts
(
void
)
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{
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/* Clear Alarm Timer interrupt status */
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Chip_ATIMER_ClearIntStatus
();
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/* Clear Alarm Timer interrupt flag */
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Chip_EVRT_ClrPendIntSrc
(
EVRT_SRC_ATIMER
);
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}
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/*****************************************************************************
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* Public functions
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****************************************************************************/
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void
EVRT_IRQHandler
(
void
)
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{
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/* Check if source interrupt is ATIMER */
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if
(
Chip_EVRT_IsSourceInterrupting
(
EVRT_SRC_ATIMER
)) {
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ATIMER_ClearInts
();
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}
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}
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int
main
(
void
)
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{
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bool
On
=
false
;
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Board_Init
();
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Board_LED_Init
();
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/* Init Alarm Timer with Preset Count for about 1s */
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Chip_ATIMER_Init
(
PresetCount
);
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/* Init EVRT */
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Chip_EVRT_Init
();
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/* Enable EVRT in order to be able to read the ATIMER interrupt */
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Chip_EVRT_ConfigIntSrcActiveType
(
EVRT_SRC_ATIMER
,
EVRT_SRC_ACTIVE_HIGH_LEVEL
);
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/* Enable Alarm Timer Source */
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Chip_EVRT_SetUpIntSrc
(
EVRT_SRC_ATIMER
,
ENABLE
);
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/* Enable NVIC */
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NVIC_EnableIRQ(EVENTROUTER_IRQn);
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/* Clear the interrupt states */
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ATIMER_ClearInts
();
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/* Enable Alarm Timer */
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Chip_ATIMER_IntEnable
();
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while
(1) {
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/* Sleep until ATIMER fires */
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__WFI();
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On = (bool) !On;
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Board_LED_Set
(1, On);
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}
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}
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applications
lpc18xx_43xx
examples
periph
periph_atimer
atimer.c
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