import com.pi4j.io.gpio.GpioController;
import com.pi4j.io.gpio.GpioFactory;
import com.pi4j.io.gpio.GpioPinDigitalOutput;
import com.pi4j.io.gpio.PinState;
import com.pi4j.io.gpio.RaspiPin;

/**
 * This example code demonstrates how to perform simple state
 * control of a GPIO pin on the Raspberry Pi.
 *
 * @author Robert Savage
 */
public class CycleGpioExample
{
    public static void main(String[] args) throws InterruptedException
    {
        System.out.println("<--Pi4J--> GPIO Cycle Example ... started.");

        // create gpio controller
        GpioController gpio = GpioFactory.getInstance();

        // provision gpio pin #01 as an output pin and turn on
        GpioPinDigitalOutput[] pin = {
                gpio.provisionDigitalOutputPin(RaspiPin.GPIO_08, "MyLED-0", PinState.LOW),
                gpio.provisionDigitalOutputPin(RaspiPin.GPIO_09, "MyLED-1", PinState.LOW),
                gpio.provisionDigitalOutputPin(RaspiPin.GPIO_07, "MyLED-2", PinState.LOW),
                gpio.provisionDigitalOutputPin(RaspiPin.GPIO_11, "MyLED-3", PinState.LOW),
                gpio.provisionDigitalOutputPin(RaspiPin.GPIO_10, "MyLED-4", PinState.LOW),
                gpio.provisionDigitalOutputPin(RaspiPin.GPIO_13, "MyLED-5", PinState.LOW),
                gpio.provisionDigitalOutputPin(RaspiPin.GPIO_12, "MyLED-6", PinState.LOW),
                gpio.provisionDigitalOutputPin(RaspiPin.GPIO_14, "MyLED-7", PinState.LOW)};
        System.out.println("--> GPIO state should be: ON");

        // set shutdown options on all pins
        pin[0].setShutdownOptions(true, PinState.LOW);
        pin[1].setShutdownOptions(true, PinState.LOW);
        pin[2].setShutdownOptions(true, PinState.LOW);
        pin[3].setShutdownOptions(true, PinState.LOW);
        pin[4].setShutdownOptions(true, PinState.LOW);
        pin[5].setShutdownOptions(true, PinState.LOW);
        pin[6].setShutdownOptions(true, PinState.LOW);
        pin[7].setShutdownOptions(true, PinState.LOW);

        while(true)
        {
            for(int index = 0; index <= 7; index++)
            {
                pin[index].pulse(50);
                Thread.sleep(50);
            }

            for(int index = 7; index >= 0; index--)
            {
                pin[index].pulse(50);
                Thread.sleep(50);
            }
        }
    }
}