app: update application to use the custom blink API

Update the application to use the new custom blink API. It changes the
blink period if the sensor reports a proximity value that is 1.

Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>

Author: gmarull

app/prj.conf

@@ -4,3 +4,4 @@
 # This file contains selected Kconfig options for the application.
 
 CONFIG_SENSOR=y
+CONFIG_BLINK=y

app/src/main.c

@@ -5,15 +5,23 @@
 
 #include <zephyr/kernel.h>
 #include <zephyr/drivers/sensor.h>
+#include <zephyr/logging/log.h>
+
+#include <app/drivers/blink.h>
+
 #include <app_version.h>
 
-#include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(main, CONFIG_APP_LOG_LEVEL);
 
+#define BLINK_PERIOD_MS_STEP 100U
+#define BLINK_PERIOD_MS_MAX  1000U
+
 int main(void)
 {
 	int ret;
-	const struct device *sensor;
+	unsigned int period_ms = BLINK_PERIOD_MS_MAX;
+	const struct device *sensor, *blink;
+	struct sensor_value last_val = { 0 }, val;
 
 	printk("Zephyr Example Application %s\n", APP_VERSION_STRING);
 
@@ -23,9 +31,21 @@ int main(void)
 		return 0;
 	}
 
-	while (1) {
-		struct sensor_value val;
+	blink = DEVICE_DT_GET(DT_NODELABEL(blink_led));
+	if (!device_is_ready(blink)) {
+		LOG_ERR("Blink LED not ready");
+		return 0;
+	}
 
+	ret = blink_off(blink);
+	if (ret < 0) {
+		LOG_ERR("Could not turn off LED (%d)", ret);
+		return 0;
+	}
+
+	printk("Use the sensor to change LED blinking period\n");
+
+	while (1) {
 		ret = sensor_sample_fetch(sensor);
 		if (ret < 0) {
 			LOG_ERR("Could not fetch sample (%d)", ret);
@@ -38,9 +58,21 @@ int main(void)
 			return 0;
 		}
 
-		printk("Sensor value: %d\n", val.val1);
+		if ((last_val.val1 == 0) && (val.val1 == 1)) {
+			if (period_ms == 0U) {
+				period_ms = BLINK_PERIOD_MS_MAX;
+			} else {
+				period_ms -= BLINK_PERIOD_MS_STEP;
+			}
+
+			printk("Proximity detected, setting LED period to %u ms\n",
+			       period_ms);
+			blink_set_period_ms(blink, period_ms);
+		}
+
+		last_val = val;
 
-		k_sleep(K_MSEC(1000));
+		k_sleep(K_MSEC(100));
 	}
 
 	return 0;