Add 01_blinky_button

apps/01_blinky_button/src/main.c

@@ -0,0 +1,102 @@
+#include <stdio.h>
+
+// Include core zephyr kernel facilities e.g. k_sleep()
+#include <zephyr/kernel.h>
+
+// Inlcude Zephyr's device model types and helpers
+#include <zephyr/device.h>
+
+// Access the C macros for reading information from the devicetree at build time
+#include <zephyr/devicetree.h>
+
+// Include GPIO driver API and the typed GPIO helpers required
+#include <zephyr/drivers/gpio.h>
+
+
+#if !DT_NODE_HAS_STATUS(DT_ALIAS(led0), okay)
+#error "Board does not define alias led0. Add a board overlay"
+#endif
+
+#if !DT_NODE_HAS_STATUS(DT_ALIAS(sw0), okay)
+#error "Board does not define alias sw0. Add a board overlay"
+#endif
+
+#if DT_HAS_ALIAS(led0)
+static const struct gpio_dt_spec led_red =
+    GPIO_DT_SPEC_GET(DT_ALIAS(led0), gpios);
+#endif
+
+#if DT_HAS_ALIAS(led1)
+static const struct gpio_dt_spec led_blue =
+    GPIO_DT_SPEC_GET(DT_ALIAS(led1), gpios);
+#endif
+
+#if DT_HAS_ALIAS(led2)
+static const struct gpio_dt_spec led_green =
+    GPIO_DT_SPEC_GET(DT_ALIAS(led2), gpios);
+#endif
+
+#if DT_HAS_ALIAS(sw0)
+static const struct gpio_dt_spec button =
+    GPIO_DT_SPEC_GET(DT_ALIAS(sw0), gpios);
+#endif    
+
+
+int main(void) {
+
+	bool led_state = true;
+
+// Make sure the GPIO is ready
+#if DT_HAS_ALIAS(led0)
+    if (!gpio_is_ready_dt(&led_red)) {
+        return 0;
+    }
+    gpio_pin_configure_dt(&led_red, GPIO_OUTPUT_ACTIVE);
+#endif
+
+#if DT_HAS_ALIAS(led1)
+    if (!gpio_is_ready_dt(&led_blue)) {
+        return 0;
+    }
+    gpio_pin_configure_dt(&led_blue, GPIO_OUTPUT_ACTIVE);
+#endif
+
+#if DT_HAS_ALIAS(led2)
+    if (!gpio_is_ready_dt(&led_green)) {
+        return 0;
+    }
+    gpio_pin_configure_dt(&led_green, GPIO_OUTPUT_INACTIVE);
+#endif
+
+#if DT_HAS_ALIAS(sw0)
+    if (!gpio_is_ready_dt(&button)) {
+        return 0;
+    }
+    gpio_pin_configure_dt(&button, GPIO_INPUT);
+#endif    
+
+	while (1) {
+
+	#if DT_HAS_ALIAS(led0)
+	    gpio_pin_toggle_dt(&led_red);
+	    // gpio_pin_set_dt(&led_red, led_state);
+	#endif
+
+	#if DT_HAS_ALIAS(led1)
+	    gpio_pin_toggle_dt(&led_blue);
+	    // gpio_pin_set_dt(&led_blue, led_state);
+	#endif
+
+	    uint8_t button_status = gpio_pin_get_dt(&button);
+	    gpio_pin_set_dt(&led_green, button_status);
+
+		led_state = !led_state;
+		printf("LED state: %s\n", led_state ? "ON" : "OFF");
+
+		k_msleep(500);
+
+	}
+
+	return 0;
+
+}