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>
72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
/*
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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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static const char *now_str(void)
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{
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static char buf[16]; /* ...HH:MM:SS.MMM */
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uint32_t now = k_uptime_get_32();
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unsigned int ms = now % MSEC_PER_SEC;
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unsigned int s;
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unsigned int min;
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unsigned int h;
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now /= MSEC_PER_SEC;
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s = now % 60U;
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now /= 60U;
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min = now % 60U;
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now /= 60U;
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h = now;
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snprintf(buf, sizeof(buf), "%u:%02u:%02u.%03u",
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h, min, s, ms);
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return buf;
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}
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int main(void)
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{
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const struct device *const dht22 = DEVICE_DT_GET_ONE(aosong_dht);
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if (!device_is_ready(dht22)) {
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printf("Device %s is not ready\n", dht22->name);
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return 0;
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}
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while (true) {
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int rc = sensor_sample_fetch(dht22);
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if (rc != 0) {
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printf("Sensor fetch failed: %d\n", rc);
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break;
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}
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struct sensor_value temperature;
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struct sensor_value humidity;
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rc = sensor_channel_get(dht22, SENSOR_CHAN_AMBIENT_TEMP,
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&temperature);
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if (rc == 0) {
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rc = sensor_channel_get(dht22, SENSOR_CHAN_HUMIDITY,
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&humidity);
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}
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if (rc != 0) {
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printf("get failed: %d\n", rc);
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break;
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}
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printf("[%s]: %.1f Cel ; %.1f %%RH\n",
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now_str(),
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sensor_value_to_double(&temperature),
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sensor_value_to_double(&humidity));
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k_sleep(K_SECONDS(2));
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}
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return 0;
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}
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