MeadowApp.cs

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

namespace DigitalInputPort;

public class MeadowApp : App<F7FeatherV2>
{
    private List<IDigitalInputPort> inputs = new List<IDigitalInputPort>();

    public override Task Initialize()
    {
        // we'll create 3 inputs, with each of the available resistor modes
        var d5 = Device.Pins.D05.CreateDigitalInputPort(resistorMode: ResistorMode.Disabled);
        inputs.Add(d5);
        var d6 = Device.Pins.D06.CreateDigitalInputPort(resistorMode: ResistorMode.InternalPullUp);
        inputs.Add(d6);
        var d7 = Device.Pins.D07.CreateDigitalInputPort(resistorMode: ResistorMode.InternalPullDown);
        inputs.Add(d7);

        TimeSpan debounceDuration = TimeSpan.FromMilliseconds(20);
        var d4 = Device.Pins.D04.CreateDigitalInterruptPort(InterruptMode.EdgeBoth, ResistorMode.Disabled);
        d4.DebounceDuration = debounceDuration;
        d4.Changed += OnStateChangedHandler;
        inputs.Add(d4);

        // since we're looking for falling, pull it up
        var d3 = Device.Pins.D03.CreateDigitalInterruptPort(InterruptMode.EdgeFalling, ResistorMode.InternalPullUp);
        d3.DebounceDuration = debounceDuration;
        d3.Changed += OnStateChangedHandler;
        inputs.Add(d3);

        // since we're looking for risinging, pull it down
        var d2 = Device.Pins.D02.CreateDigitalInterruptPort(InterruptMode.EdgeRising, ResistorMode.InternalPullDown);
        d2.DebounceDuration = debounceDuration;
        d2.Changed += OnStateChangedHandler;
        inputs.Add(d2);

        return Task.CompletedTask;
    }

    public override async Task Run()
    {
        // Display the current input states
        // The general idea here is that you have 1 floating, 1 pulled high, and 1 pulled low.
        // With nothing connected, you should have inputs of:
        //   - D05: undetermined
        //   - D06: high
        //   - D07: low
        // You can then drive the outputs with a jumper to either GND or VCC to change their states to high or low
        while (true)
        {
            var line1 = string.Join(" ", inputs.Select(i => i.Pin.Name).ToArray());
            var line2 = string.Join(" ", inputs.Select(i => $" {(i.State ? 1 : 0)} ").ToArray());

            Resolver.Log.Info(line1);
            Resolver.Log.Info(line2 + "\n");

            await Task.Delay(2000);
        }
    }

    private void OnStateChangedHandler(object sender, DigitalPortResult e)
    {
        var port = sender as IDigitalInputPort;

        if (port == null)
        {
            Resolver.Log.Info($"sender is a {port.GetType().Name}");
        }
        else
        {
            Resolver.Log.Info($"{port.Pin.Name} state changed to {e.New.State}");
        }
    }
}