Meadow.Foundation.ICs.IOExpanders.Pcx857x 1.3.2.1-beta

Meadow.Foundation.ICs.IOExpanders.Pcx857x

Pcx857x I2C digital input/output expander (Pca8574, Pca8575, Pcf8574, Pcf855)

The Pcx857x library is designed for the Wilderness Labs Meadow .NET IoT platform and is part of 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, to view all Wilderness Labs open-source projects, including samples, visit github.com/wildernesslabs

Usage

private Pca8574 device;

public override Task Initialize()
{
    device = new Pca8574(Device.CreateI2cBus(1), 0x20, Device.Pins.D01);

    return base.Initialize();
}

public override Task Run()
{
    TestDigitalOutputPorts(10);

    return Task.CompletedTask;
}

private void TestDigitalOutputPorts(int loopCount)
{
    var out00 = device.CreateDigitalOutputPort(device.Pins.P0);
    var out01 = device.CreateDigitalOutputPort(device.Pins.P1);
    var out02 = device.CreateDigitalOutputPort(device.Pins.P2);
    var out03 = device.CreateDigitalOutputPort(device.Pins.P3);
    var out04 = device.CreateDigitalOutputPort(device.Pins.P4);
    var out05 = device.CreateDigitalOutputPort(device.Pins.P5);
    var out06 = device.CreateDigitalOutputPort(device.Pins.P6);
    var out07 = device.CreateDigitalOutputPort(device.Pins.P7);

    var outputPorts = new List<IDigitalOutputPort>()
    {
        out00, out01, out02, out03,
        out04, out05, out06, out07,
    };

    foreach (var outputPort in outputPorts)
    {
        outputPort.State = true;

        Thread.Sleep(100);
    }

    for (int l = 0; l < loopCount; l++)
    {
        // loop through all the outputs
        for (int i = 0; i < outputPorts.Count; i++)
        {
            // turn them all off
            device.AllOff();

            Thread.Sleep(1000);

            // turn them all on
            device.AllOn();
            Thread.Sleep(1000);

            // turn on just one
            Console.WriteLine($"Update pin {i} to {true}");
            outputPorts[i].State = true;
            Thread.Sleep(250);

            // turn off just one
            Console.WriteLine($"Update pin {i} to {false}");
            outputPorts[i].State = false;
            Thread.Sleep(250);
        }
    }

    // cleanup
    for (int i = 0; i < outputPorts.Count; i++)
    {
        outputPorts[i].Dispose();
    }
}