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/*
* Copyright 2018-2019 NXP
* All rights reserved.
*
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "fsl_tempmon.h"
/*******************************************************************************
* Definitions
******************************************************************************/
/* Component ID definition, used by tools. */
#ifndef FSL_COMPONENT_ID
#define FSL_COMPONENT_ID "platform.drivers.tempmon"
#endif
/*! @brief TEMPMON calibration data mask. */
#define TEMPMON_HOTTEMPMASK 0xFFU
#define TEMPMON_HOTTEMPSHIFT 0x00U
#define TEMPMON_HOTCOUNTMASK 0xFFF00U
#define TEMPMON_HOTCOUNTSHIFT 0X08U
#define TEMPMON_ROOMCOUNTMASK 0xFFF00000U
#define TEMPMON_ROOMCOUNTSHIFT 0x14U
/*! @brief the room temperature. */
#define TEMPMON_ROOMTEMP 25.0f
/*******************************************************************************
* Prototypes
******************************************************************************/
/*******************************************************************************
* Variables
******************************************************************************/
static uint32_t s_hotTemp; /*!< The value of TEMPMON_TEMPSENSE0[TEMP_VALUE] at room temperature .*/
static uint32_t s_hotCount; /*!< The value of TEMPMON_TEMPSENSE0[TEMP_VALUE] at the hot temperature.*/
static float s_hotT_ROOM; /*!< The value of s_hotTemp minus room temperature(25��).*/
static uint32_t s_roomC_hotC; /*!< The value of s_roomCount minus s_hotCount.*/
/*******************************************************************************
* Code
******************************************************************************/
/*!
* brief Initializes the TEMPMON module.
*
* param base TEMPMON base pointer
* param config Pointer to configuration structure.
*/
void TEMPMON_Init(TEMPMON_Type *base, const tempmon_config_t *config)
{
assert(NULL != config);
uint32_t calibrationData;
uint32_t roomCount;
/* Power on the temperature sensor*/
base->TEMPSENSE0 &= ~TEMPMON_TEMPSENSE0_POWER_DOWN_MASK;
/* Set temperature monitor frequency */
base->TEMPSENSE1 = TEMPMON_TEMPSENSE1_MEASURE_FREQ(config->frequency);
/* ready to read calibration data */
calibrationData = OCOTP->ANA1;
s_hotTemp = (uint32_t)(calibrationData & TEMPMON_HOTTEMPMASK) >> TEMPMON_HOTTEMPSHIFT;
s_hotCount = (uint32_t)(calibrationData & TEMPMON_HOTCOUNTMASK) >> TEMPMON_HOTCOUNTSHIFT;
roomCount = (uint32_t)(calibrationData & TEMPMON_ROOMCOUNTMASK) >> TEMPMON_ROOMCOUNTSHIFT;
s_hotT_ROOM = (float)s_hotTemp - TEMPMON_ROOMTEMP;
s_roomC_hotC = roomCount - s_hotCount;
/* Set alarm temperature */
TEMPMON_SetTempAlarm(base, config->highAlarmTemp, kTEMPMON_HighAlarmMode);
TEMPMON_SetTempAlarm(base, config->panicAlarmTemp, kTEMPMON_PanicAlarmMode);
TEMPMON_SetTempAlarm(base, config->lowAlarmTemp, kTEMPMON_LowAlarmMode);
}
/*!
* brief Deinitializes the TEMPMON module.
*
* param base TEMPMON base pointer
*/
void TEMPMON_Deinit(TEMPMON_Type *base)
{
base->TEMPSENSE0 |= TEMPMON_TEMPSENSE0_POWER_DOWN_MASK;
}
/*!
* brief Gets the default configuration structure.
*
* This function initializes the TEMPMON configuration structure to a default value. The default
* values are:
* tempmonConfig->frequency = 0x02U;
* tempmonConfig->highAlarmTemp = 44U;
* tempmonConfig->panicAlarmTemp = 90U;
* tempmonConfig->lowAlarmTemp = 39U;
*
* param config Pointer to a configuration structure.
*/
void TEMPMON_GetDefaultConfig(tempmon_config_t *config)
{
assert(config);
/* Initializes the configure structure to zero. */
(void)memset(config, 0, sizeof(*config));
/* Default measure frequency */
config->frequency = 0x03U;
/* Default high alarm temperature */
config->highAlarmTemp = 40U;
/* Default panic alarm temperature */
config->panicAlarmTemp = 90U;
/* Default low alarm temperature */
config->lowAlarmTemp = 20U;
}
/*!
* brief Get current temperature with the fused temperature calibration data.
*
* param base TEMPMON base pointer
* return current temperature with degrees Celsius.
*/
float TEMPMON_GetCurrentTemperature(TEMPMON_Type *base)
{
/* Check arguments */
assert(NULL != base);
uint32_t nmeas;
float tmeas;
while (0U == (base->TEMPSENSE0 & TEMPMON_TEMPSENSE0_FINISHED_MASK))
{
}
/* ready to read temperature code value */
nmeas = (base->TEMPSENSE0 & TEMPMON_TEMPSENSE0_TEMP_CNT_MASK) >> TEMPMON_TEMPSENSE0_TEMP_CNT_SHIFT;
/* Calculate temperature */
tmeas = (float)s_hotTemp - (((float)nmeas - (float)s_hotCount) * s_hotT_ROOM / (float)s_roomC_hotC);
return tmeas;
}
/*!
* brief Set the temperature count (raw sensor output) that will generate an alarm interrupt.
*
* param base TEMPMON base pointer
* param tempVal The alarm temperature with degrees Celsius
* param alarmMode The alarm mode.
*/
void TEMPMON_SetTempAlarm(TEMPMON_Type *base, uint32_t tempVal, tempmon_alarm_mode alarmMode)
{
/* Check arguments */
assert(NULL != base);
uint32_t tempCodeVal;
uint32_t tempRegVal;
/* Calculate alarm temperature code value */
tempCodeVal = (uint32_t)(s_hotCount + (s_hotTemp - tempVal) * s_roomC_hotC / (uint32_t)s_hotT_ROOM);
switch (alarmMode)
{
case kTEMPMON_HighAlarmMode:
/* Clear alarm value and set a new high alarm temperature code value */
tempRegVal = base->TEMPSENSE0;
tempRegVal =
(tempRegVal & ~TEMPMON_TEMPSENSE0_ALARM_VALUE_MASK) | TEMPMON_TEMPSENSE0_ALARM_VALUE(tempCodeVal);
base->TEMPSENSE0 = tempRegVal;
break;
case kTEMPMON_PanicAlarmMode:
/* Clear panic alarm value and set a new panic alarm temperature code value */
tempRegVal = base->TEMPSENSE2;
tempRegVal = (tempRegVal & ~TEMPMON_TEMPSENSE2_PANIC_ALARM_VALUE_MASK) |
TEMPMON_TEMPSENSE2_PANIC_ALARM_VALUE(tempCodeVal);
base->TEMPSENSE2 = tempRegVal;
break;
case kTEMPMON_LowAlarmMode:
/* Clear low alarm value and set a new low alarm temperature code value */
tempRegVal = base->TEMPSENSE2;
tempRegVal = (tempRegVal & ~TEMPMON_TEMPSENSE2_LOW_ALARM_VALUE_MASK) |
TEMPMON_TEMPSENSE2_LOW_ALARM_VALUE(tempCodeVal);
base->TEMPSENSE2 = tempRegVal;
break;
default:
assert(false);
break;
}
}
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