0b90fd5adf
As both C and C++ standards require applications running under an OS to
return 'int', adapt that for Zephyr to align with those standard. This also
eliminates errors when building with clang when not using -ffreestanding,
and reduces the need for compiler flags to silence warnings for both clang
and gcc.
Most of these changes were automated using coccinelle with the following
script:
@@
@@
- void
+ int
main(...) {
...
- return;
+ return 0;
...
}
Approximately 40 files had to be edited by hand as coccinelle was unable to
fix them.
Signed-off-by: Keith Packard <keithp@keithp.com>
89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
/*
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* Copyright (c) 2017 Linaro Limited
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* Copyright (c) 2019 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/kernel.h>
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#include <zephyr/device.h>
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#include <zephyr/drivers/sensor.h>
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#include <stdio.h>
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#include <zephyr/sys/util.h>
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static void process_sample(const struct device *dev)
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{
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static unsigned int obs;
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struct sensor_value pressure, temp;
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if (sensor_sample_fetch(dev) < 0) {
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printf("Sensor sample update error\n");
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return;
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}
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if (sensor_channel_get(dev, SENSOR_CHAN_PRESS, &pressure) < 0) {
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printf("Cannot read LPS22HH pressure channel\n");
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return;
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}
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if (sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temp) < 0) {
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printf("Cannot read LPS22HH temperature channel\n");
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return;
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}
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++obs;
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printf("Observation: %u\n", obs);
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/* display pressure */
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printf("Pressure: %.3f kPa\n", sensor_value_to_double(&pressure));
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/* display temperature */
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printf("Temperature: %.2f C\n", sensor_value_to_double(&temp));
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}
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static void lps22hh_handler(const struct device *dev,
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const struct sensor_trigger *trig)
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{
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process_sample(dev);
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}
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int main(void)
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{
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const struct device *const dev = DEVICE_DT_GET_ONE(st_lps22hh);
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if (!device_is_ready(dev)) {
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printk("sensor: device not ready.\n");
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return 0;
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}
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if (IS_ENABLED(CONFIG_LPS22HH_TRIGGER)) {
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struct sensor_value attr = {
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.val1 = 1,
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};
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struct sensor_trigger trig = {
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.type = SENSOR_TRIG_DATA_READY,
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.chan = SENSOR_CHAN_ALL,
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};
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if (sensor_attr_set(dev, SENSOR_CHAN_ALL,
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SENSOR_ATTR_SAMPLING_FREQUENCY, &attr) < 0) {
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printf("Cannot configure sampling rate\n");
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return 0;
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}
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if (sensor_trigger_set(dev, &trig, lps22hh_handler) < 0) {
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printf("Cannot configure trigger\n");
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return 0;
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}
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printk("Configured for triggered collection at %u Hz\n",
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attr.val1);
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}
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while (!IS_ENABLED(CONFIG_LPS22HH_TRIGGER)) {
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process_sample(dev);
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k_sleep(K_MSEC(2000));
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}
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k_sleep(K_FOREVER);
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return 0;
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}
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