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@jsturtevant
Created March 24, 2016 14:07
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Windows IoT 10 Servo Motor Example
// Copyright (c) Microsoft. All rights reserved.
// Modified and Licensed under MIT from https://github.com/ms-iot/samples
using Windows.ApplicationModel.Background;
using Windows.Devices.Gpio;
using System.Diagnostics;
using Windows.System.Threading;
// The Background Application template is documented at http://go.microsoft.com/fwlink/?LinkID=533884&clcid=0x409
namespace ServoMotorBasics
{
public sealed class StartupTask : IBackgroundTask
{
BackgroundTaskDeferral deferral;
GpioPin servoPin;
ThreadPoolTimer timer;
//A pulse of 2ms moves the servo clockwise
double ForwardPulseWidth = 2;
//A pulse of 1ms moves the servo counterclockwise
double BackwardPulseWidth = 1;
double PulseFrequency = 20;
double currentPulseWidth;
Stopwatch stopwatch;
public void Run(IBackgroundTaskInstance taskInstance)
{
deferral = taskInstance.GetDeferral();
//Motor starts off
currentPulseWidth = 0;
//The stopwatch will be used to precisely time calls to pulse the motor.
stopwatch = Stopwatch.StartNew();
GpioController controller = GpioController.GetDefault();
servoPin = controller.OpenPin(13);
servoPin.SetDriveMode(GpioPinDriveMode.Output);
// Here is how you would move the motor. Call a funciton like this when ever you are ready to move motor
MoveMotor(ForwardPulseWidth);
Wait(3000); //wait three seconds
//move it backwards
MoveMotor(BackwardPulseWidth);
}
private void MoveMotor(double direction)
{
//If a button is pressed the pulsewidth is changed to cause the motor to spin in the appropriate direction
//Write the pin high for the appropriate length of time
if (currentPulseWidth != 0)
{
servoPin.Write(GpioPinValue.High);
}
//Use the wait helper method to wait for the length of the pulse
Wait(currentPulseWidth);
//The pulse if over and so set the pin to low and then wait until it's time for the next pulse
servoPin.Write(GpioPinValue.Low);
Wait(PulseFrequency - currentPulseWidth);
}
//A synchronous wait is used to avoid yielding the thread
//This method calculates the number of CPU ticks will elapse in the specified time and spins
//in a loop until that threshold is hit. This allows for very precise timing.
private void Wait(double milliseconds)
{
long initialTick = stopwatch.ElapsedTicks;
long initialElapsed = stopwatch.ElapsedMilliseconds;
double desiredTicks = milliseconds / 1000.0 * Stopwatch.Frequency;
double finalTick = initialTick + desiredTicks;
while (stopwatch.ElapsedTicks < finalTick)
{
}
}
}
}
@WillianPaez
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Hello, how are you? I'm using the translator to be able to write in English, hahaha. And I want to ask a question :c as it is implemented this code in a project? It is that days ago I try to operate a servomotor with a Raspberry pi 3 and Windows 10 IoT. You would greatly appreciate if I can guide, please.

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