blob: 90f17e5dc9d7264cffe9b94dd2ffe583c178851c [file] [log] [blame]
/*
* Copyright (c) 2022 Thomas Stranger
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/sensor.h>
/*
* Get a device structure from a devicetree node with compatible
* "maxim,ds18b20". (If there are multiple, just pick one.)
*/
static const struct device *get_ds18b20_device(void)
{
const struct device *const dev = DEVICE_DT_GET_ANY(maxim_ds18b20);
if (dev == NULL) {
/* No such node, or the node does not have status "okay". */
printk("\nError: no device found.\n");
return NULL;
}
if (!device_is_ready(dev)) {
printk("\nError: Device \"%s\" is not ready; "
"check the driver initialization logs for errors.\n",
dev->name);
return NULL;
}
printk("Found device \"%s\", getting sensor data\n", dev->name);
return dev;
}
void main(void)
{
const struct device *dev = get_ds18b20_device();
if (dev == NULL) {
return;
}
while (1) {
struct sensor_value temp;
sensor_sample_fetch(dev);
sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temp);
printk("Temp: %d.%06d\n", temp.val1, temp.val2);
k_sleep(K_MSEC(2000));
}
}