d090751c3d
Adjust the documentation and devicetree overlays so the sample can be built for any board with an Arduino I2C and SPI pinout, defaulting I2C and SPI to y to make it easier to switch between the two without requiring a pristine build. The user has to choose an appropriate overlay or have a sensor built in to the board. Use the newly introduced DEVICE_DT_GET_ANY() in main.c to ask for a bosch,bme280 without worrying over the details or exposing DT_DRV_COMPAT-based functionality that is really meant for drivers. Remove the no-longer-needed board specific overlay for nRF52840 DK; this is covered by the generic Arduino overlays now. Fix the datasheet link while we're here. Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*
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* Copyright (c) 2012-2014 Wind River Systems, Inc.
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* Copyright (c) 2021 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr.h>
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#include <device.h>
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#include <devicetree.h>
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#include <drivers/sensor.h>
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/*
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* Get a device structure from a devicetree node with compatible
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* "bosch,bme280". (If there are multiple, just pick one.)
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*/
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static const struct device *get_bme280_device(void)
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{
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const struct device *dev = DEVICE_DT_GET_ANY(bosch_bme280);
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if (dev == NULL) {
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/* No such node, or the node does not have status "okay". */
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printk("\nError: no device found.\n");
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return NULL;
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}
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if (!device_is_ready(dev)) {
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printk("\nError: Device \"%s\" is not ready; "
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"check the driver initialization logs for errors.\n",
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dev->name);
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return NULL;
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}
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printk("Found device \"%s\", getting sensor data\n", dev->name);
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return dev;
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}
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void main(void)
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{
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const struct device *dev = get_bme280_device();
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if (dev == NULL) {
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return;
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}
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while (1) {
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struct sensor_value temp, press, humidity;
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sensor_sample_fetch(dev);
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sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temp);
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sensor_channel_get(dev, SENSOR_CHAN_PRESS, &press);
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sensor_channel_get(dev, SENSOR_CHAN_HUMIDITY, &humidity);
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printk("temp: %d.%06d; press: %d.%06d; humidity: %d.%06d\n",
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temp.val1, temp.val2, press.val1, press.val2,
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humidity.val1, humidity.val2);
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k_sleep(K_MSEC(1000));
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}
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}
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