Adding an I2C sample for the i.MX8M plus board specifically, using the tcs34725 sensor.

samples/NXP/NXPGPIOSample/NXPGPIOSample.sln

@@ -0,0 +1,51 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.7.34302.85
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NXPGPIOSample", "NXPGPIOSample\NXPGPIOSample.csproj", "{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|ARM = Debug|ARM
+		Debug|ARM64 = Debug|ARM64
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|ARM = Release|ARM
+		Release|ARM64 = Release|ARM64
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|ARM.ActiveCfg = Debug|ARM
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|ARM.Build.0 = Debug|ARM
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|ARM.Deploy.0 = Debug|ARM
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|ARM64.Build.0 = Debug|ARM64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|ARM64.Deploy.0 = Debug|ARM64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|x64.ActiveCfg = Debug|x64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|x64.Build.0 = Debug|x64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|x64.Deploy.0 = Debug|x64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|x86.ActiveCfg = Debug|x86
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|x86.Build.0 = Debug|x86
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Debug|x86.Deploy.0 = Debug|x86
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|ARM.ActiveCfg = Release|ARM
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|ARM.Build.0 = Release|ARM
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|ARM.Deploy.0 = Release|ARM
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|ARM64.ActiveCfg = Release|ARM64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|ARM64.Build.0 = Release|ARM64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|ARM64.Deploy.0 = Release|ARM64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|x64.ActiveCfg = Release|x64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|x64.Build.0 = Release|x64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|x64.Deploy.0 = Release|x64
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|x86.ActiveCfg = Release|x86
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|x86.Build.0 = Release|x86
+		{A41EB9AB-5990-4B2F-9BB0-4DF9DECED77B}.Release|x86.Deploy.0 = Release|x86
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {74AAC59C-4197-413B-9284-1623FFC7DF6D}
+	EndGlobalSection
+EndGlobal

samples/NXP/NXPGPIOSample/NXPGPIOSample/App.xaml

@@ -0,0 +1,7 @@
+<Application
+    x:Class="NXPGPIOSample.App"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:NXPGPIOSample">
+
+</Application>

samples/NXP/NXPGPIOSample/NXPGPIOSample/App.xaml.cs

@@ -0,0 +1,100 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.ApplicationModel;
+using Windows.ApplicationModel.Activation;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+namespace NXPGPIOSample
+{
+    /// <summary>
+    /// Provides application-specific behavior to supplement the default Application class.
+    /// </summary>
+    sealed partial class App : Application
+    {
+        /// <summary>
+        /// Initializes the singleton application object.  This is the first line of authored code
+        /// executed, and as such is the logical equivalent of main() or WinMain().
+        /// </summary>
+        public App()
+        {
+            this.InitializeComponent();
+            this.Suspending += OnSuspending;
+        }
+
+        /// <summary>
+        /// Invoked when the application is launched normally by the end user.  Other entry points
+        /// will be used such as when the application is launched to open a specific file.
+        /// </summary>
+        /// <param name="e">Details about the launch request and process.</param>
+        protected override void OnLaunched(LaunchActivatedEventArgs e)
+        {
+            Frame rootFrame = Window.Current.Content as Frame;
+
+            // Do not repeat app initialization when the Window already has content,
+            // just ensure that the window is active
+            if (rootFrame == null)
+            {
+                // Create a Frame to act as the navigation context and navigate to the first page
+                rootFrame = new Frame();
+
+                rootFrame.NavigationFailed += OnNavigationFailed;
+
+                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
+                {
+                    //TODO: Load state from previously suspended application
+                }
+
+                // Place the frame in the current Window
+                Window.Current.Content = rootFrame;
+            }
+
+            if (e.PrelaunchActivated == false)
+            {
+                if (rootFrame.Content == null)
+                {
+                    // When the navigation stack isn't restored navigate to the first page,
+                    // configuring the new page by passing required information as a navigation
+                    // parameter
+                    rootFrame.Navigate(typeof(MainPage), e.Arguments);
+                }
+                // Ensure the current window is active
+                Window.Current.Activate();
+            }
+        }
+
+        /// <summary>
+        /// Invoked when Navigation to a certain page fails
+        /// </summary>
+        /// <param name="sender">The Frame which failed navigation</param>
+        /// <param name="e">Details about the navigation failure</param>
+        void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
+        {
+            throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
+        }
+
+        /// <summary>
+        /// Invoked when application execution is being suspended.  Application state is saved
+        /// without knowing whether the application will be terminated or resumed with the contents
+        /// of memory still intact.
+        /// </summary>
+        /// <param name="sender">The source of the suspend request.</param>
+        /// <param name="e">Details about the suspend request.</param>
+        private void OnSuspending(object sender, SuspendingEventArgs e)
+        {
+            var deferral = e.SuspendingOperation.GetDeferral();
+            //TODO: Save application state and stop any background activity
+            deferral.Complete();
+        }
+    }
+}

samples/NXP/NXPGPIOSample/NXPGPIOSample/MainPage.xaml

@@ -0,0 +1,18 @@
+<Page
+    x:Class="NXPGPIOSample.MainPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:NXPGPIOSample"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+
+    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
+            <Ellipse x:Name="LED" Fill="LightGray" Stroke="White" Width="100" Height="100" Margin="10"/>
+            <TextBlock x:Name="DelayText" Text="500ms" Margin="10" TextAlignment="Center" FontSize="26.667" />
+            <TextBlock x:Name="GpioStatus" Text="Waiting to initialize GPIO..." Margin="10,50,10,10" TextAlignment="Center" FontSize="26.667" />
+        </StackPanel>
+    </Grid>
+</Page>

samples/NXP/NXPGPIOSample/NXPGPIOSample/MainPage.xaml.cs

@@ -0,0 +1,79 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System;
+using Windows.Devices.Gpio;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Media;
+
+namespace NXPGPIOSample
+{
+    public sealed partial class MainPage : Page
+    {
+        private int[] LED_PINS = new int[] {147, 146, 141, 140, 139, 138, 137, 136, 87, 86, 85, 84, 83 };
+        private GpioPin[] pins;
+        private GpioPinValue[] pinValues;
+        private DispatcherTimer timer;
+        private SolidColorBrush redBrush = new SolidColorBrush(Windows.UI.Colors.Red);
+        private SolidColorBrush grayBrush = new SolidColorBrush(Windows.UI.Colors.LightGray);
+
+        public MainPage()
+        {
+            InitializeComponent();
+
+            timer = new DispatcherTimer();
+            timer.Interval = TimeSpan.FromMilliseconds(500);
+            timer.Tick += Timer_Tick;
+            InitGPIO();
+            if (pins != null)
+            {
+                timer.Start();
+            }
+        }
+
+        private void InitGPIO()
+        {
+            var gpio = GpioController.GetDefault();
+
+            // Show an error if there is no GPIO controller
+            if (gpio == null)
+            {
+                pins = null;
+                GpioStatus.Text = "There is no GPIO controller on this device.";
+                return;
+            }
+
+            pins = new GpioPin[LED_PINS.Length];
+            pinValues = new GpioPinValue[LED_PINS.Length];
+            for (int i = 0; i < LED_PINS.Length; i++)
+            {
+                pins[i] = gpio.OpenPin(LED_PINS[i]);
+                pinValues[i] = GpioPinValue.High;
+                pins[i].Write(pinValues[i]);
+                pins[i].SetDriveMode(GpioPinDriveMode.Output);
+            }
+
+            GpioStatus.Text = "GPIO pins initialized correctly.";
+        }
+
+        private void Timer_Tick(object sender, object e)
+        {
+            for (int i = 0; i < LED_PINS.Length; i++)
+            {
+                if (pinValues[i] == GpioPinValue.High)
+                {
+                    pinValues[i] = GpioPinValue.Low;
+                    pins[i].Write(pinValues[i]);
+                    LED.Fill = redBrush;
+                }
+                else
+                {
+                    pinValues[i] = GpioPinValue.High;
+                    pins[i].Write(pinValues[i]);
+                    LED.Fill = grayBrush;
+                }
+            }
+        }
+    }
+}