203 lines
6.4 KiB
C
203 lines
6.4 KiB
C
/*
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* Copyright (c) 2016, Zolertia <http://www.zolertia.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \addtogroup zoul-iaq-sensor
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* @{
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* Driver for the RE-Mote IAQ iAQ-Core (Indoor Air Quality Sensor)
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* \file
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* Driver for the RE-Mote RF IAQ iAQ-Core sensor (IAQ)
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* \author
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* Aitor Mejias <amejias@zolertia.com>
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*/
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/*---------------------------------------------------------------------------*/
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#include <stdio.h>
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#include "contiki.h"
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#include "dev/gpio.h"
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#include "dev/i2c.h"
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#include "iaq.h"
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#include "sys/timer.h"
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#include "sys/etimer.h"
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#include "lib/sensors.h"
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/*---------------------------------------------------------------------------*/
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#define DEBUG 0
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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/* Callback pointers when interrupt occurs */
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void (*iaq_enable_callback)(uint16_t value);
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/*---------------------------------------------------------------------------*/
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static int16_t enabled;
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/*---------------------------------------------------------------------------*/
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static struct etimer et;
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static simple_iaq_data iaq_data;
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static uint8_t iaq_buffer[IAQ_FRAME_SIZE+1];
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/*---------------------------------------------------------------------------*/
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PROCESS(iaq_process, "IAQ process handler");
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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/* Return the status of the iAQ-Core or the status of the driver */
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if (type == IAQ_STATUS) {
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return (uint16_t)iaq_data.status;
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} else if (type == IAQ_DRIVER_STATUS) {
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return enabled;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(iaq_process, ev, data)
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{
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#if DEBUG
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uint8_t i = 0;
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#endif
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PROCESS_EXITHANDLER();
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PROCESS_BEGIN();
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i2c_init(I2C_SDA_PORT, I2C_SDA_PIN, I2C_SCL_PORT, I2C_SCL_PIN,
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I2C_SCL_NORMAL_BUS_SPEED);
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while(1) {
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etimer_set(&et, (IAQ_POLLING_TIME));
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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i2c_master_enable();
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if(i2c_burst_receive(IAQ_ADDR, &iaq_buffer[0], IAQ_FRAME_SIZE) !=
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I2C_MASTER_ERR_NONE) {
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PRINTF("IAQ: Failed to retrieve data from IAQ\n");
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enabled = IAQ_ERROR;
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iaq_data.status = IAQ_INTERNAL_ERROR;
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} else {
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#if DEBUG
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PRINTF("IAQ: Buffer ");
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for (i=1;i<10;i++) {
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PRINTF("[%d] %x, ", i-1, iaq_buffer[i-1]);
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}
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PRINTF("\n");
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#endif
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/* Update the status of the sensor. This value readed represents the
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internal status of the external driver. */
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switch (iaq_buffer[2]) {
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case IAQ_INTERNAL_SUCCESS:
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enabled = IAQ_ACTIVE;
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break;
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case IAQ_INTERNAL_RUNIN:
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enabled = IAQ_INIT_STATE;
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break;
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case IAQ_INTERNAL_BUSY:
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case IAQ_INTERNAL_ERROR:
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enabled = IAQ_ERROR;
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break;
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default:
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enabled = IAQ_ERROR;
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break;
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}
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iaq_data.tvoc = ((uint16_t)iaq_buffer[0] << 8) + iaq_buffer[1];
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iaq_data.co2 = ((uint16_t)iaq_buffer[7] << 8) + iaq_buffer[8];
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iaq_data.status = iaq_buffer[2];
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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if (!enabled) {
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PRINTF("IAQ: Sensor not enabled\n");
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return IAQ_ERROR;
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}
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if (enabled == IAQ_INIT_STATE) {
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PRINTF("IAQ: Sensor initializing\n");
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return IAQ_INIT_STATE;
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}
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if (type == IAQ_CO2_VALUE) {
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return iaq_data.co2;
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}
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if (type == IAQ_VOC_VALUE) {
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return iaq_data.tvoc;
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}
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if (type == IAQ_STATUS) {
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#if DEBUG
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switch (iaq_data.status) {
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case IAQ_INTERNAL_SUCCESS:
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PRINTF("IAQ Status: SUCCESS\n");
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break;
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case IAQ_INTERNAL_RUNIN:
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PRINTF("IAQ Status: WARM UP\n");
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break;
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case IAQ_INTERNAL_BUSY:
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case IAQ_INTERNAL_ERROR:
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PRINTF("IAQ Status: ERROR\n");
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break;
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default:
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PRINTF("IAQ Status: UNKNOWN STATUS %d\n", iaq_data.status);
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break;
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}
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#endif
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return iaq_data.status;
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}
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return IAQ_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int value)
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{
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/* Check the current status. If is initialized or is active, return the same
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state */
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if ((enabled == IAQ_INIT_STATE) || (enabled == IAQ_ACTIVE)) {
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return IAQ_ERROR;
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}
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/* Fix the status in initial wait status */
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enabled = IAQ_INIT_STATE;
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/* Start Internal process to measure the iAQ Sensor */
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process_start(&iaq_process, NULL);
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return enabled;
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}
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/*---------------------------------------------------------------------------*/
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/* name, type, value, configure, status */
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SENSORS_SENSOR(iaq, IAQ_SENSOR, value, configure, status);
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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*/
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