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61 lines
1.3 KiB
61 lines
1.3 KiB
/* |
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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 "xtimer.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_LINE |
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#error "MQ3_ADC_LINE 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_LINE(%i)... ", (int)MQ3_ADC_LINE); |
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res = mq3_init(&dev, MQ3_ADC_LINE); |
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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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xtimer_usleep((uint32_t)500 * 1000); |
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} |
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return 0; |
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}
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