main.c
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/*
* Copyright (C) 2015 Eistec AB
*
* 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 HIH6130 sensor driver
*
* @author Joakim Nohlgård <joakim.nohlgard@eistec.se>
*
* @}
*/
#ifndef TEST_HIH6130_I2C
#error "TEST_HIH6130_I2C not defined"
#endif
#ifndef TEST_HIH6130_ADDR
#error "TEST_HIH6130_ADDR not defined"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "xtimer.h"
#include "hih6130.h"
#define SLEEP (100 * 1000U)
int main(void)
{
hih6130_t dev;
puts("HIH6130 sensor driver test application\n");
printf("Initializing I2C_%i... ", TEST_HIH6130_I2C);
if (i2c_init_master(TEST_HIH6130_I2C, I2C_SPEED_FAST) < 0) {
puts("[Failed]");
return -1;
}
puts("[OK]");
printf("Initializing HIH6130 sensor at I2C_%i, address 0x%02x... ",
TEST_HIH6130_I2C, TEST_HIH6130_ADDR);
hih6130_init(&dev, TEST_HIH6130_I2C, TEST_HIH6130_ADDR);
puts("[OK]");
while (1) {
float hum = 0.f;
float temp = 0.f;
int status;
float integral = 0.f;
float fractional;
xtimer_usleep(SLEEP);
status = hih6130_get_humidity_temperature_float(&dev, &hum, &temp);
if (status < 0) {
printf("Communication error: %d\n", status);
continue;
} else if (status == 1) {
puts("Stale values");
}
/* Several platforms usually build with nano.specs, (without float printf) */
/* Split value into two integer parts for printing. */
fractional = modff(hum, &integral);
printf("humidity: %4d.%04u %%",
(int)integral, (unsigned int)abs(fractional * 10000.f));
fractional = modff(temp, &integral);
printf(" temperature: %4d.%04u C\n",
(int)integral, (unsigned int)abs(fractional * 10000.f));
}
return 0;
}