LPCOpen Platform for LPC18XX/43XX microcontrollers
18XX43XX
LPCOpen Platform for the NXP LPC18XX/43XX family of Microcontrollers
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chip_18xx_43xx
ritimer_18xx_43xx.c
Go to the documentation of this file.
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/*
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* @brief LPC18xx/43xx RITimer chip 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 RIT */
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void
Chip_RIT_Init
(
LPC_RITIMER_T
*pRITimer)
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{
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Chip_Clock_EnableOpts
(
CLK_MX_RITIMER
,
true
,
true
, 1);
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pRITimer->
COMPVAL
= 0xFFFFFFFF;
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pRITimer->
MASK
= 0x00000000;
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pRITimer->
CTRL
= 0x0C;
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pRITimer->
COUNTER
= 0x00000000;
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}
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/* DeInitialize the RIT */
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void
Chip_RIT_DeInit
(
LPC_RITIMER_T
*pRITimer)
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{
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Chip_RIT_Init
(pRITimer);
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Chip_Clock_Disable
(
CLK_MX_RITIMER
);
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}
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/* Set timer interval value */
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void
Chip_RIT_SetTimerInterval
(
LPC_RITIMER_T
*pRITimer, uint32_t time_interval)
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{
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uint32_t cmp_value;
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/* Determine aapproximate compare value based on clock rate and passed interval */
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cmp_value = (
Chip_Clock_GetRate
(
CLK_MX_RITIMER
) / 1000) * time_interval;
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/* Set timer compare value */
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Chip_RIT_SetCOMPVAL
(pRITimer, cmp_value);
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/* Set timer enable clear bit to clear timer to 0 whenever
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counter value equals the contents of RICOMPVAL */
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Chip_RIT_EnableCTRL
(pRITimer,
RIT_CTRL_ENCLR
);
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}
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/* Check whether interrupt is pending */
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IntStatus
Chip_RIT_GetIntStatus
(
LPC_RITIMER_T
*pRITimer)
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{
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uint8_t result;
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if
((pRITimer->
CTRL
&
RIT_CTRL_INT
) == 1) {
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result =
SET
;
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}
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else
{
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return
RESET
;
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}
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return
(
IntStatus
) result;
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}
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