FacePalmGamer Posts - Answer Overflow

FacePalmGamer

•Created by FacePalmGamer on 8/29/2023 in #help

✅ Making custom Events

I am working with a pi using the System.Device.Gpio. is there a way to create an event for when a pin changes? I have never worked with making events only ever subscribed to known events, so i don't know if you even can, but I dont see why you couldn't. the GPIO library has 2 functions. waitForEvent, and waitForEventAsync. Previously I just made a task list like this: (This is a poor rendition, these functions would do alot more)

void async main()
{
List<task> tasks = new List<Task>();
tasks.add(ListenAsync);
tasks.add(Listen2Async);
await Task.WhenAll(Tasks)
}

async Task ListenAsync()
{
  return controller.WaitForEventAsync(...)
}

void async main()
{
List<task> tasks = new List<Task>();
tasks.add(ListenAsync);
tasks.add(Listen2Async);
await Task.WhenAll(Tasks)
}

async Task ListenAsync()
{
  return controller.WaitForEventAsync(...)
}

this seems wrong, and if I could just make a pinChange event and subscribe a method to it, it would be alot easier. Effectively like an interrupt. TLDR What is the correct way to look for pin chages? should i just stick with making a list of tasks, or is there a way to make an event system for pin changes?

8 replies

CC#

•Created by FacePalmGamer on 8/24/2023 in #help

✅ Compile with bat file

Is there an easy way to compile and run in a bat file? I have a discord bot I am messing around with, and I am trying to make it redeploy itself whenever a github push is made. I can already detect when a push is made by just looking for the webhook post in a channel, then I know how to pull from git in batch, but I'm not sure how to compile the code then start the program. I read something about the csc command, but I'm not sure how to install that on my pc or use it really

5 replies

CC#

•Created by FacePalmGamer on 7/19/2023 in #help

✅ Correct way to pass data between threads?

I have an event on a simple Winform reading from the serial port. The issue is I would like to output the data onto a winform component, but because its on an even it happens on a different thread and I get the error

Cross-thread operation not valid: Control 'textBoxRecieve' accessed from a thread other than the thread it was created on.

so what is the correct way to pass this data? I know I could do something like a channel do make a cross thread communication system, but that seems excessive and I figure there is an easier way I do now know

public void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
        {
            textBoxRecieve.Text = textBoxRecieve.Text + Environment.NewLine + ((SerialPort)sender).ReadExisting();
        }

public void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
        {
            textBoxRecieve.Text = textBoxRecieve.Text + Environment.NewLine + ((SerialPort)sender).ReadExisting();
        }

That was the function running and erroring. I was just trying to make a simple ECHO test debugListen.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler); and that is how I was setting up the event

80 replies

CC#

•Created by FacePalmGamer on 11/8/2022 in #help

Getting the result from a list of tasks

Its been a minute since I have done async methods but i know i can do a list of tasks I just think I'm using them wrong.

const double LAT_MIN = 37.70649; //y
const double LAT_MAX = 37.77436;
const double LON_MAX = -85.95120;
const double LON_MIN = -85.86829;

List<Task> tasks = new List<Task>();
List<Point> points = new List<Point>();

for (double i = LAT_MIN; i < LAT_MIN; i += .00005)
{
    tasks.Add(CreatePointsAsync(i));
}
foreach (Task task in tasks)
    task.Start();

Task.WhenAll(tasks).Wait();
foreach(Task<List<Point>> task in tasks)
{
    points.InsertRange(points.Count, task.Result);
}

foreach(Point point in points)
{
    Console.WriteLine(point.X + " " + point.Y);
}

async Task<List<Point>> CreatePointsAsync(double y)
{
    List<Point> value = new List<Point>();
    for (double i = LON_MIN; i < LON_MAX; i += .00005)
    {
        value.Add(new Point(i, y));
    }
    return value;
}

public struct Point
{
    public double X;
    public double Y;

    public Point(double X, double Y)
    {
        this.X = X;
        this.Y = Y;
    }
};

const double LAT_MIN = 37.70649; //y
const double LAT_MAX = 37.77436;
const double LON_MAX = -85.95120;
const double LON_MIN = -85.86829;

List<Task> tasks = new List<Task>();
List<Point> points = new List<Point>();

for (double i = LAT_MIN; i < LAT_MIN; i += .00005)
{
    tasks.Add(CreatePointsAsync(i));
}
foreach (Task task in tasks)
    task.Start();

Task.WhenAll(tasks).Wait();
foreach(Task<List<Point>> task in tasks)
{
    points.InsertRange(points.Count, task.Result);
}

foreach(Point point in points)
{
    Console.WriteLine(point.X + " " + point.Y);
}

async Task<List<Point>> CreatePointsAsync(double y)
{
    List<Point> value = new List<Point>();
    for (double i = LON_MIN; i < LON_MAX; i += .00005)
    {
        value.Add(new Point(i, y));
    }
    return value;
}

public struct Point
{
    public double X;
    public double Y;

    public Point(double X, double Y)
    {
        this.X = X;
        this.Y = Y;
    }
};

I need to create a lot of points so i wanted to split it up to make it faster

23 replies

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