106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
/*
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* @brief LPC5410X RITimer chip driver
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2014
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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_EnablePeriphClock(SYSCON_CLOCK_RIT);
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Chip_SYSCON_PeriphReset(RESET_RIT);
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/* Default is timer disabled */
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pRITimer->CTRL = 0x0;
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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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pRITimer->CTRL = 0x0;
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Chip_Clock_DisablePeriphClock(SYSCON_CLOCK_RIT);
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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_GetMainClockRate() / 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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}
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/* Set timer interval value (48-bit) */
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void Chip_RIT_SetTimerInterval64(LPC_RITIMER_T *pRITimer, uint64_t time_interval)
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{
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uint64_t cmp_value;
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/* Determine aapproximate compare value based on clock rate and passed interval */
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cmp_value = (uint64_t) Chip_Clock_GetMainClockRate() / 1000;
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cmp_value = cmp_value * time_interval;
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/* Set timer compare value */
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Chip_RIT_SetCOMPVAL64(pRITimer, cmp_value);
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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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