main.c
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/*
* Copyright (C) 2014 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser General
* Public License v2.1. See the file LICENSE in the top level directory for more
* details.
*/
/**
* @ingroup tests
* @{
*
* @file
* @brief Test application for the MQ-3 alcohol sensor driver
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*
* @}
*/
#include <stdio.h>
#include "xtimer.h"
#include "mq3.h"
#include "periph_conf.h"
#include "periph/adc.h"
#ifndef MQ3_ADC_LINE
#error "MQ3_ADC_LINE is not specified"
#endif
int main(void)
{
mq3_t dev;
int res;
puts("MQ-3 alcohol sensor test application\n");
printf("Initializing MQ-3 sensor at ADC_LINE(%i)... ", (int)MQ3_ADC_LINE);
res = mq3_init(&dev, MQ3_ADC_LINE);
if (res == 0) {
puts("[ok]\n");
}
else {
puts("[failed]");
return 1;
}
puts("Will now read and print the sensor twice a second:");
while (1) {
int raw, ppm, alc_a, alc_b;
raw = mq3_read_raw(&dev);
ppm = mq3_read(&dev);
alc_a = ppm / 1000;
alc_b = ppm - (alc_a * 1000);
printf("RAW: %4i, per mille: %1i.%03i\n", raw, alc_a, alc_b);
xtimer_usleep(500 * 1000);
}
return 0;
}