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/*
* @brief LPC5410X RITimer chip driver
*
* @note
* Copyright(C) NXP Semiconductors, 2014
* All rights reserved.
*
* @par
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* LPC products. This software is supplied "AS IS" without any warranties of
* any kind, and NXP Semiconductors and its licensor disclaim any and
* all warranties, express or implied, including all implied warranties of
* merchantability, fitness for a particular purpose and non-infringement of
* intellectual property rights. NXP Semiconductors assumes no responsibility
* or liability for the use of the software, conveys no license or rights under any
* patent, copyright, mask work right, or any other intellectual property rights in
* or to any products. NXP Semiconductors reserves the right to make changes
* in the software without notification. NXP Semiconductors also makes no
* representation or warranty that such application will be suitable for the
* specified use without further testing or modification.
*
* @par
* Permission to use, copy, modify, and distribute this software and its
* documentation is hereby granted, under NXP Semiconductors' and its
* licensor's relevant copyrights in the software, without fee, provided that it
* is used in conjunction with NXP Semiconductors microcontrollers. This
* copyright, permission, and disclaimer notice must appear in all copies of
* this code.
*/
#include "chip.h"
/*****************************************************************************
* Private types/enumerations/variables
****************************************************************************/
/*****************************************************************************
* Public types/enumerations/variables
****************************************************************************/
/*****************************************************************************
* Private functions
****************************************************************************/
/*****************************************************************************
* Public functions
****************************************************************************/
/* Initialize the RIT */
void Chip_RIT_Init(LPC_RITIMER_T *pRITimer)
{
Chip_Clock_EnablePeriphClock(SYSCON_CLOCK_RIT);
Chip_SYSCON_PeriphReset(RESET_RIT);
/* Default is timer disabled */
pRITimer->CTRL = 0x0;
}
/* DeInitialize the RIT */
void Chip_RIT_DeInit(LPC_RITIMER_T *pRITimer)
{
pRITimer->CTRL = 0x0;
Chip_Clock_DisablePeriphClock(SYSCON_CLOCK_RIT);
}
/* Set timer interval value */
void Chip_RIT_SetTimerInterval(LPC_RITIMER_T *pRITimer, uint32_t time_interval)
{
uint32_t cmp_value;
/* Determine aapproximate compare value based on clock rate and passed interval */
cmp_value = (Chip_Clock_GetMainClockRate() / 1000) * time_interval;
/* Set timer compare value */
Chip_RIT_SetCOMPVAL(pRITimer, cmp_value);
}
/* Set timer interval value (48-bit) */
void Chip_RIT_SetTimerInterval64(LPC_RITIMER_T *pRITimer, uint64_t time_interval)
{
uint64_t cmp_value;
/* Determine aapproximate compare value based on clock rate and passed interval */
cmp_value = (uint64_t) Chip_Clock_GetMainClockRate() / 1000;
cmp_value = cmp_value * time_interval;
/* Set timer compare value */
Chip_RIT_SetCOMPVAL64(pRITimer, cmp_value);
}
/* Check whether interrupt is pending */
IntStatus Chip_RIT_GetIntStatus(LPC_RITIMER_T *pRITimer)
{
uint8_t result;
if ((pRITimer->CTRL & RIT_CTRL_INT) == 1) {
result = SET;
}
else {
return RESET;
}
return (IntStatus) result;
}
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