contiki/platform/zoul/dev/iaq.c
2016-02-15 11:00:48 +01:00

203 lines
6.4 KiB
C

/*
* Copyright (c) 2016, Zolertia <http://www.zolertia.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 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.
*
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup zoul-iaq-sensor
* @{
* Driver for the RE-Mote IAQ iAQ-Core (Indoor Air Quality Sensor)
* \file
* Driver for the RE-Mote RF IAQ iAQ-Core sensor (IAQ)
* \author
* Aitor Mejias <amejias@zolertia.com>
*/
/*---------------------------------------------------------------------------*/
#include <stdio.h>
#include "contiki.h"
#include "dev/gpio.h"
#include "dev/i2c.h"
#include "iaq.h"
#include "sys/timer.h"
#include "sys/etimer.h"
#include "lib/sensors.h"
/*---------------------------------------------------------------------------*/
#define DEBUG 0
#if DEBUG
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/*---------------------------------------------------------------------------*/
/* Callback pointers when interrupt occurs */
void (*iaq_enable_callback)(uint16_t value);
/*---------------------------------------------------------------------------*/
static int16_t enabled;
/*---------------------------------------------------------------------------*/
static struct etimer et;
static simple_iaq_data iaq_data;
static uint8_t iaq_buffer[IAQ_FRAME_SIZE+1];
/*---------------------------------------------------------------------------*/
PROCESS(iaq_process, "IAQ process handler");
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
/* Return the status of the iAQ-Core or the status of the driver */
if (type == IAQ_STATUS) {
return (uint16_t)iaq_data.status;
} else if (type == IAQ_DRIVER_STATUS) {
return enabled;
}
return 0;
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(iaq_process, ev, data)
{
#if DEBUG
uint8_t i = 0;
#endif
PROCESS_EXITHANDLER();
PROCESS_BEGIN();
i2c_init(I2C_SDA_PORT, I2C_SDA_PIN, I2C_SCL_PORT, I2C_SCL_PIN,
I2C_SCL_NORMAL_BUS_SPEED);
while(1) {
etimer_set(&et, (IAQ_POLLING_TIME));
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
i2c_master_enable();
if(i2c_burst_receive(IAQ_ADDR, &iaq_buffer[0], IAQ_FRAME_SIZE) !=
I2C_MASTER_ERR_NONE) {
PRINTF("IAQ: Failed to retrieve data from IAQ\n");
enabled = IAQ_ERROR;
iaq_data.status = IAQ_INTERNAL_ERROR;
} else {
#if DEBUG
PRINTF("IAQ: Buffer ");
for (i=1;i<10;i++) {
PRINTF("[%d] %x, ", i-1, iaq_buffer[i-1]);
}
PRINTF("\n");
#endif
/* Update the status of the sensor. This value readed represents the
internal status of the external driver. */
switch (iaq_buffer[2]) {
case IAQ_INTERNAL_SUCCESS:
enabled = IAQ_ACTIVE;
break;
case IAQ_INTERNAL_RUNIN:
enabled = IAQ_INIT_STATE;
break;
case IAQ_INTERNAL_BUSY:
case IAQ_INTERNAL_ERROR:
enabled = IAQ_ERROR;
break;
default:
enabled = IAQ_ERROR;
break;
}
iaq_data.tvoc = ((uint16_t)iaq_buffer[0] << 8) + iaq_buffer[1];
iaq_data.co2 = ((uint16_t)iaq_buffer[7] << 8) + iaq_buffer[8];
iaq_data.status = iaq_buffer[2];
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
if (!enabled) {
PRINTF("IAQ: Sensor not enabled\n");
return IAQ_ERROR;
}
if (enabled == IAQ_INIT_STATE) {
PRINTF("IAQ: Sensor initializing\n");
return IAQ_INIT_STATE;
}
if (type == IAQ_CO2_VALUE) {
return iaq_data.co2;
}
if (type == IAQ_VOC_VALUE) {
return iaq_data.tvoc;
}
if (type == IAQ_STATUS) {
#if DEBUG
switch (iaq_data.status) {
case IAQ_INTERNAL_SUCCESS:
PRINTF("IAQ Status: SUCCESS\n");
break;
case IAQ_INTERNAL_RUNIN:
PRINTF("IAQ Status: WARM UP\n");
break;
case IAQ_INTERNAL_BUSY:
case IAQ_INTERNAL_ERROR:
PRINTF("IAQ Status: ERROR\n");
break;
default:
PRINTF("IAQ Status: UNKNOWN STATUS %d\n", iaq_data.status);
break;
}
#endif
return iaq_data.status;
}
return IAQ_ERROR;
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int value)
{
/* Check the current status. If is initialized or is active, return the same
state */
if ((enabled == IAQ_INIT_STATE) || (enabled == IAQ_ACTIVE)) {
return IAQ_ERROR;
}
/* Fix the status in initial wait status */
enabled = IAQ_INIT_STATE;
/* Start Internal process to measure the iAQ Sensor */
process_start(&iaq_process, NULL);
return enabled;
}
/*---------------------------------------------------------------------------*/
/* name, type, value, configure, status */
SENSORS_SENSOR(iaq, IAQ_SENSOR, value, configure, status);
/*---------------------------------------------------------------------------*/
/**
* @}
*/