| /* |
| * Copyright (c) 2023 Ian Morris |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include <zephyr/device.h> |
| #include <zephyr/drivers/sensor.h> |
| #include <zephyr/sys/util_macro.h> |
| #include <zephyr/kernel.h> |
| |
| #define DHT_ALIAS(i) DT_ALIAS(_CONCAT(dht, i)) |
| #define DHT_DEVICE(i, _) \ |
| IF_ENABLED(DT_NODE_EXISTS(DHT_ALIAS(i)), (DEVICE_DT_GET(DHT_ALIAS(i)),)) |
| |
| /* Support up to 10 temperature/humidity sensors */ |
| static const struct device *const sensors[] = {LISTIFY(10, DHT_DEVICE, ())}; |
| |
| int main(void) |
| { |
| int rc; |
| |
| for (size_t i = 0; i < ARRAY_SIZE(sensors); i++) { |
| if (!device_is_ready(sensors[i])) { |
| printk("sensor: device %s not ready.\n", sensors[i]->name); |
| return 0; |
| } |
| } |
| |
| while (1) { |
| for (size_t i = 0; i < ARRAY_SIZE(sensors); i++) { |
| struct device *dev = (struct device *)sensors[i]; |
| |
| rc = sensor_sample_fetch(dev); |
| if (rc < 0) { |
| printk("%s: sensor_sample_fetch() failed: %d\n", dev->name, rc); |
| return rc; |
| } |
| |
| struct sensor_value temp; |
| struct sensor_value hum; |
| |
| rc = sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temp); |
| if (rc == 0) { |
| rc = sensor_channel_get(dev, SENSOR_CHAN_HUMIDITY, &hum); |
| } |
| if (rc != 0) { |
| printf("get failed: %d\n", rc); |
| break; |
| } |
| |
| printk("%16s: temp is %d.%02d °C humidity is %d.%02d %%RH\n", |
| dev->name, temp.val1, temp.val2 / 10000, |
| hum.val1, hum.val2 / 10000); |
| } |
| k_msleep(1000); |
| } |
| return 0; |
| } |