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65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
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/*
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* Copyright (C) 2014 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @ingroup tests
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* @{
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*
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* @file
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* @brief Test application for the MQ-3 alcohol sensor driver
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <stdio.h>
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#include "vtimer.h"
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#include "mq3.h"
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#include "periph_conf.h"
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#include "periph/adc.h"
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#ifndef MQ3_ADC
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#error "MQ3_ADC is not specified"
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#endif
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#ifndef MQ3_CHAN
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#error "MQ3_CHAN is not specified"
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#endif
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int main(void)
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{
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mq3_t dev;
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int res;
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puts("MQ-3 alcohol sensor test application\n");
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printf("Initializing MQ-3 sensor at ADC_%i, channel %i... ", MQ3_ADC, MQ3_CHAN);
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res = mq3_init(&dev, MQ3_ADC, MQ3_CHAN);
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if (res == 0) {
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puts("[ok]\n");
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}
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else {
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puts("[failed]");
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return 1;
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}
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puts("Will now read and print the sensor twice a second:");
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while (1) {
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int raw, ppm, alc_a, alc_b;
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raw = mq3_read_raw(&dev);
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ppm = mq3_read(&dev);
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alc_a = ppm / 1000;
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alc_b = ppm - (alc_a * 1000);
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printf("RAW: %4i, per mille: %1i.%03i\n", raw, alc_a, alc_b);
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vtimer_usleep(500 * 1000);
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}
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return 0;
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}
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