MeadowApp.cs

using Meadow;
using Meadow.Devices;
using Meadow.Hardware;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace Walking_DigitalOutputs;

public class MeadowApp : App<F7FeatherV2>
{
    IList<IDigitalOutputPort> _outs = new List<IDigitalOutputPort>();
    IList<string> _outChans = new List<string>();

    public override async Task Run()
    {
        while (true)
        {

            // create all our digital output ports
            ConfigureOutputs();
            // turn them on/off
            await WalkOutputs();
            // tear down
            DisposePorts();
        }
    }

    void ConfigureOutputs()
    {
        foreach (var pin in Device.Pins.AllPins)
        {
            Resolver.Log.Info("Found pin: " + pin.Name);
            foreach (var channel in pin.SupportedChannels)
            {
                Resolver.Log.Info("Contains " + channel.Name + "channel.");

                // if it's a digital channel, create a port.
                if (channel is IDigitalChannelInfo
                    && !(channel is ICommunicationChannelInfo)
                    && !(channel is IPwmChannelInfo)
                    )
                {
                    if (!_outChans.Contains(channel.Name))
                    {
                        _outs.Add(Device.CreateDigitalOutputPort(pin));
                    }
                    else
                    {
                        Resolver.Log.Info("Cannot add pin " + pin.Name + ", as the digital channel, " + channel.Name + " exists on another pin");
                    }
                }
            }
        }
    }

    async Task WalkOutputs()
    {
        // turn each one on for a bit.
        foreach (var port in _outs)
        {
            port.State = true;
            await Task.Delay(250);
            port.State = false;
        }
    }

    void DisposePorts()
    {
        foreach (var port in _outs)
        {
            port.Dispose();
        }
        _outs.Clear();
    }
}