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samples: blinky: add verbose printf output

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Add console output to the sample, with the LED status upon a GPIO toggle.

Signed-off-by: Patryk Koscik <pkoscik@antmicro.com>
This commit is contained in:
Patryk Koscik 2023-09-25 14:12:35 +02:00 • committed by Fabio Baltieri
commit b22bb172f2
2 changed files with 8 additions and 2 deletions
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5
samples/basic/blinky/README.rst
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@ -40,8 +40,9 @@ Build and flash Blinky as follows, changing ``reel_board`` for your board:
:goals: build flash :goals: build flash
:compact: :compact:
After flashing, the LED starts to blink. If a runtime error occurs, the sample After flashing, the LED starts to blink and messages with the current LED state
exits without printing to the console. are printed on the console. If a runtime error occurs, the sample exits without
printing to the console.
Build errors Build errors
************ ************

5
samples/basic/blinky/src/main.c
View file

@ -4,6 +4,7 @@
* SPDX-License-Identifier: Apache-2.0 * SPDX-License-Identifier: Apache-2.0
*/ */
#include <stdio.h>
#include <zephyr/kernel.h> #include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h> #include <zephyr/drivers/gpio.h>
@ -22,6 +23,7 @@ static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(LED0_NODE, gpios);
int main(void) int main(void)
{ {
int ret; int ret;
bool led_state = true;
if (!gpio_is_ready_dt(&led)) { if (!gpio_is_ready_dt(&led)) {
return 0; return 0;
@ -37,6 +39,9 @@ int main(void)
if (ret < 0) { if (ret < 0) {
return 0; return 0;
} }
led_state = !led_state;
printf("LED state: %s\n", led_state ? "ON" : "OFF");
k_msleep(SLEEP_TIME_MS); k_msleep(SLEEP_TIME_MS);
} }
return 0; return 0;