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Added sensor API for the SHT11 driver

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adamdunkels 2010-01-14 20:16:33 +00:00
parent 4f6f6c972d
commit 53edff7655
2 changed files with 153 additions and 0 deletions
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102
core/dev/sht11-sensor.c Normal file
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/*
* Copyright (c) 2005, Swedish Institute of Computer Science
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: sht11-sensor.c,v 1.1 2010/01/14 20:16:33 adamdunkels Exp $
*/
#include <stdlib.h>
#include <io.h>
#include "contiki.h"
#include "lib/sensors.h"
#include "dev/sht11.h"
#include "dev/sht11-sensor.h"
const struct sensors_sensor sht11_sensor;
enum {
ON, OFF
};
static uint8_t state = OFF;
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
switch(type) {
/* Photosynthetically Active Radiation. */
case SHT11_SENSOR_TEMP:
return sht11_temp();;
/* Total Solar Radiation. */
case SHT11_SENSOR_HUMIDITY:
return sht11_humidity();
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
switch(type) {
case SENSORS_ACTIVE:
case SENSORS_READY:
return (state == ON);
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, void *c)
{
switch(type) {
case SENSORS_ACTIVE:
if(c) {
if(!status(SENSORS_ACTIVE)) {
rtimer_clock_t t0;
sht11_init();
state = ON;
/* For for about 11 ms before the SHT11 can be used. */
t0 = RTIMER_NOW();
while(RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + RTIMER_SECOND / 100));
}
} else {
sht11_off();
state = OFF;
}
}
return 0;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(sht11_sensor, "sht11",
value, configure, status);

51
core/dev/sht11-sensor.h Normal file
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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
*
*
* $Id: sht11-sensor.h,v 1.1 2010/01/14 20:16:33 adamdunkels Exp $
*
* -----------------------------------------------------------------
*
* Author : Adam Dunkels, Joakim Eriksson, Niclas Finne
* Created : 2010-01-08
* Updated : $Date: 2010/01/14 20:16:33 $
* $Revision: 1.1 $
*/
#ifndef __SHT11_SENSOR_H__
#define __SHT11_SENSOR_H__
#include "lib/sensors.h"
extern const struct sensors_sensor sht11_sensor;
#define SHT11_SENSOR_TEMP 0
#define SHT11_SENSOR_HUMIDITY 1
#endif /* __SHT11-SENSOR_H__ */