test/driver_dht: initial import

tests/driver_dht/Makefile

@@ -0,0 +1,27 @@
+APPLICATION = driver_dht
+include ../Makefile.tests_common
+
+FEATURES_REQUIRED = periph_gpio
+
+# define default pin mappings for some boards:
+ifneq (,$(filter stm32f4discovery,$(BOARD)))
+  export DHT_GPIO ?= GPIO_4
+endif
+
+USEMODULE += dht
+
+ifneq (,$(DHT_TYPE))
+  CFLAGS += -DDHT_TYPE=$(DHT_TYPE)
+else
+  # set random default
+  CFLAGS += -DDHT_TYPE=DHT11
+endif
+
+ifneq (,$(DHT_GPIO))
+  CFLAGS += -DDHT_GPIO=$(DHT_GPIO)
+else
+  # set random default
+  CFLAGS += -DDHT_GPIO=GPIO_0
+endif
+
+include $(RIOTBASE)/Makefile.include

tests/driver_dht/main.c

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2015 Ludwig Ortmann, Christian Mehlis
+ *
+ * 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 dht humidity and temperature sensor driver
+ *
+ * @author      Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
+ * @author      Christian Mehlis <christian@m3hlis.de>
+ *
+ * @}
+ */
+
+#ifndef DHT_TYPE
+#error "DHT_TYPE not defined"
+#endif
+
+#ifndef DHT_GPIO
+#error "DHT_GPIO not defined"
+#endif
+
+#include <stdio.h>
+
+#include "hwtimer.h"
+
+#include "dht.h"
+
+int main(void)
+{
+    dht_t dev;
+
+    puts("DHT temperature and humidity sensor test application\n");
+
+    printf("Initializing DHT sensor at GPIO_%i... ", DHT_GPIO);
+    if (dht_init(&dev, DHT_TYPE, DHT_GPIO) == 0) {
+        puts("[OK]\n");
+    }
+    else {
+        puts("[Failed]");
+        return 1;
+    }
+
+    dht_data_t data;
+    float temp, hum;
+    while (1) {
+
+        if (dht_read_raw(&dev, &data) == -1) {
+            puts("error reading data");
+        }
+        dht_parse(&dev, &data, &hum, &temp);
+        printf("raw relative humidity: %i\nraw temperature: %i C\n", data.humidity, data.temperature);
+        printf("relative humidity: %i\ntemperature: %i C\n", (int) hum, (int) temp);
+        hwtimer_wait(HWTIMER_TICKS(2000 * 1000));
+    }
+
+    return 0;
+}