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>
43 lines
796 B
C
43 lines
796 B
C
/*
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* Copyright (c) 2020 Sven Herrmann
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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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int main(void)
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{
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const struct device *const dev = DEVICE_DT_GET_ONE(honeywell_mpr);
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int rc;
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if (!device_is_ready(dev)) {
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printf("Device %s is not ready\n", dev->name);
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return 0;
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}
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while (1) {
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struct sensor_value pressure;
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rc = sensor_sample_fetch(dev);
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if (rc != 0) {
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printf("sensor_sample_fetch error: %d\n", rc);
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break;
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}
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rc = sensor_channel_get(dev, SENSOR_CHAN_PRESS, &pressure);
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if (rc != 0) {
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printf("sensor_channel_get error: %d\n", rc);
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break;
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}
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printf("pressure: %u.%u kPa\n", pressure.val1, pressure.val2);
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k_sleep(K_SECONDS(1));
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}
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return 0;
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}
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