samples/basic/blinky/src/main.c

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <zephyr.h>
#include <board.h>
#include <device.h>
#include <gpio.h>

/* Change this if you have an LED connected to a custom port */
#define PORT	LED0_GPIO_PORT

/* Change this if you have an LED connected to a custom pin */
#define LED	LED0_GPIO_PIN

/* 1000 msec = 1 sec */
#define SLEEP_TIME 	1000

void main(void)
{
	int cnt = 0;
	struct device *dev;

	dev = device_get_binding(PORT);
	/* Set LED pin as output */
	gpio_pin_configure(dev, LED, GPIO_DIR_OUT);

	while (1) {
		/* Set pin to HIGH/LOW every 1 second */
		gpio_pin_write(dev, LED, cnt % 2);
		cnt++;
		k_sleep(SLEEP_TIME);
	}
}