Update Readmes

Source/Meadow.Foundation.Peripherals/Displays.Tm1637/Driver/Readme.md

@@ -19,7 +19,7 @@ public override Task Initialize()
 {
     Resolver.Log.Info("Initialize...");
 
-    display = new Tm1637(Device, Device.Pins.D02, Device.Pins.D01);
+    display = new Tm1637(Device.Pins.D02, Device.Pins.D01);
 
     display.Brightness = 7;
     display.ScreenOn = true;

Source/Meadow.Foundation.Peripherals/Motors.ElectronicSpeedController/Driver/Readme.md

@@ -13,12 +13,11 @@ To view all Wilderness Labs open-source projects, including samples, visit [gith
 ## Usage
 
 ```csharp
-readonly Frequency frequency = new Frequency(50, Frequency.UnitType.Hertz);
-const float armMs = 0.5f;
-const float powerIncrement = 0.05f;
-
-ElectronicSpeedController esc;
-RotaryEncoderWithButton rotary;
+private readonly Frequency frequency = new Frequency(50, Frequency.UnitType.Hertz);
+private const float armMs = 0.5f;
+private const float powerIncrement = 0.05f;
+private ElectronicSpeedController esc;
+private RotaryEncoderWithButton rotary;
 
 public override Task Initialize()
 {
@@ -44,15 +43,15 @@ private void RotaryRotated(object sender, RotaryChangeResult e)
     esc.Power += (e.New == RotationDirection.Clockwise) ? powerIncrement : -powerIncrement;
     DisplayPowerOnLed(esc.Power);
 
-    Resolver.Log.Info($"New Power: {esc.Power * (float)100:n0}%");
+    Resolver.Log.Info($"New Power: {esc.Power * 100:n0}%");
 }
 
 /// <summary>
 /// Displays the ESC power on the onboard LED as full red @ `100%`,
 /// blue @ `0%`, and a proportional mix, in between those speeds.
 /// </summary>
 /// <param name="power"></param>
-void DisplayPowerOnLed(float power)
+private void DisplayPowerOnLed(float power)
 {
     // `0.0` - `1.0`
     int r = (int)ExtensionMethods.Map(power, 0f, 1f, 0f, 255f);

Source/Meadow.Foundation.Peripherals/Motors.Stepper.A4988/Driver/Readme.md

@@ -13,7 +13,7 @@ To view all Wilderness Labs open-source projects, including samples, visit [gith
 ## Usage
 
 ```csharp
-A4988 a4988;
+private A4988 a4988;
 
 public override Task Initialize()
 {

Source/Meadow.Foundation.Peripherals/Motors.Stepper.Em542s/Driver/Readme.md

@@ -0,0 +1,60 @@
+# Meadow.Foundation.Motors.Stepper.Em542s
+
+**The Leadshine EM542S Stepper Motor Drive**
+
+The **Em542s** library is designed for the [Wilderness Labs](www.wildernesslabs.co) Meadow .NET IoT platform and is part of [Meadow.Foundation](https://developer.wildernesslabs.co/Meadow/Meadow.Foundation/).
+
+The **Meadow.Foundation** peripherals library is an open-source repository of drivers and libraries that streamline and simplify adding hardware to your C# .NET Meadow IoT application.
+
+For more information on developing for Meadow, visit [developer.wildernesslabs.co](http://developer.wildernesslabs.co/).
+
+To view all Wilderness Labs open-source projects, including samples, visit [github.com/wildernesslabs](https://github.com/wildernesslabs/).
+
+## Usage
+
+```csharp
+private IStepperMotor stepper;
+
+public override Task Initialize()
+{
+    stepper = new Em542s(
+        Device.Pins.D15.CreateDigitalOutputPort(),
+        Device.Pins.D14.CreateDigitalOutputPort(),
+        inverseLogic: true);
+
+    return base.Initialize();
+}
+
+public override Task Run()
+{
+    var direction = RotationDirection.Clockwise;
+
+    // max rate for this drive
+    var rate = new Meadow.Units.Frequency(200, Meadow.Units.Frequency.UnitType.Kilohertz);
+
+    while (true)
+    {
+        Resolver.Log.Info($"{direction}");
+
+        stepper.Rotate(360f, direction, rate);
+        Thread.Sleep(1000);
+
+        direction = direction switch
+        {
+            RotationDirection.CounterClockwise => RotationDirection.Clockwise,
+            _ => RotationDirection.CounterClockwise
+        };
+    }
+}
+
+```
+## How to Contribute
+
+- **Found a bug?** [Report an issue](https://github.com/WildernessLabs/Meadow_Issues/issues)
+- Have a **feature idea or driver request?** [Open a new feature request](https://github.com/WildernessLabs/Meadow_Issues/issues)
+- Want to **contribute code?** Fork the [Meadow.Foundation](https://github.com/WildernessLabs/Meadow.Foundation) repository and submit a pull request against the `develop` branch
+
+
+## Need Help?
+
+If you have questions or need assistance, please join the Wilderness Labs [community on Slack](http://slackinvite.wildernesslabs.co/).