nes-proj/cpu/cc26xx-cc13xx/dev/batmon-sensor.c

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/*
* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup cc26xx-batmon
* @{
*
* \file
* Driver for the CC13xx/CC26xx AON battery monitor
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*/
/*---------------------------------------------------------------------------*/
#include "contiki-conf.h"
#include "lib/sensors.h"
#include "batmon-sensor.h"
#include "ti-lib.h"
#include <stdint.h>
#include <stdio.h>
/*---------------------------------------------------------------------------*/
#define DEBUG 0
#if DEBUG
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/*---------------------------------------------------------------------------*/
#define SENSOR_STATUS_DISABLED 0
#define SENSOR_STATUS_ENABLED 1
static int enabled = SENSOR_STATUS_DISABLED;
/*---------------------------------------------------------------------------*/
/**
* \brief Returns a reading from the sensor
* \param type BATMON_SENSOR_TYPE_TEMP or BATMON_SENSOR_TYPE_VOLT
*
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* \return The value as returned by the respective CC26xxware function
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*/
static int
value(int type)
{
if(enabled == SENSOR_STATUS_DISABLED) {
PRINTF("Sensor Disabled\n");
return 0;
}
if(type == BATMON_SENSOR_TYPE_TEMP) {
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return (int)ti_lib_aon_batmon_temperature_get_deg_c();
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} else if(type == BATMON_SENSOR_TYPE_VOLT) {
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return (int)ti_lib_aon_batmon_battery_voltage_get();
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} else {
PRINTF("Invalid type\n");
}
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return 0;
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}
/*---------------------------------------------------------------------------*/
/**
* \brief Configuration function for the battery monitor sensor.
*
* \param type Activate, enable or disable the sensor. See below
* \param enable If
*
* When type == SENSORS_HW_INIT we turn on the hardware
* When type == SENSORS_ACTIVE and enable==1 we enable the sensor
* When type == SENSORS_ACTIVE and enable==0 we disable the sensor
*/
static int
configure(int type, int enable)
{
switch(type) {
case SENSORS_HW_INIT:
ti_lib_aon_batmon_enable();
enabled = SENSOR_STATUS_ENABLED;
break;
case SENSORS_ACTIVE:
if(enable) {
ti_lib_aon_batmon_enable();
enabled = SENSOR_STATUS_ENABLED;
} else {
ti_lib_aon_batmon_disable();
enabled = SENSOR_STATUS_DISABLED;
}
break;
default:
break;
}
return enabled;
}
/*---------------------------------------------------------------------------*/
/**
* \brief Returns the status of the sensor
* \param type SENSORS_ACTIVE or SENSORS_READY
* \return 1 if the sensor is enabled
*/
static int
status(int type)
{
switch(type) {
case SENSORS_ACTIVE:
case SENSORS_READY:
return enabled;
break;
default:
break;
}
return SENSOR_STATUS_DISABLED;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(batmon_sensor, "Battery Monitor", value, configure, status);
/*---------------------------------------------------------------------------*/
/** @} */