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wiringpi-dotnet

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Provides complete managed access to the popular wiringpi C library

The default low-level provider is the wonderful WiringPi library available here. You do not need to install this library yourself. The Unosquare.WiringPi assembly will automatically extract the compiled binary of the library in the same path as the entry assembly.

Installation

Install basic Raspberry.IO package:

PM> Install-Package Unosquare.Raspberry.IO

Install WiringPi implementation:

PM> Install-Package Unosquare.WiringPi

Obtaining Board and System Information

RaspberryIO contains useful utilities to obtain information about the board it is running on. You can simply call the Pi.Info.ToString() method to obtain a dump of all system properties as a single string, or you can use the individual properties such as Installed RAM, Processor Count, Raspberry Pi Version, Serial Number, etc. There's not a lot more to this.

Please note Pi.Info depends on Wiring Pi, and the /proc/cpuinfo and /proc/meminfo files.

Using the GPIO Pins

Pin reference for the B plus (B+) - Header P1

The above diagram shows the pins of GPIO Header P1. There is an additional GPIO header on the Pi called P5. More info available here

In order to access the pins, use Pi.Gpio. The pins can have multiple behaviors and fortunately Pi.Gpio can be iterated, addressed by index, addressed by BCM pin number and provides the pins as publicly accessible properties.

Here is an example of addressing the pins in all the various ways:

public static void TestLedBlinking()
{
    // Get a reference to the pin you need to use.
    // All 3 methods below are exactly equivalent
    var blinkingPin = Pi.Gpio[17];
    blinkingPin = Pi.Gpio[BcmPin.Gpio17];
    blinkingPin = Pi.Gpio.Pin17;

    // Configure the pin as an output
    blinkingPin.PinMode = GpioPinDriveMode.Output;

    // perform writes to the pin by toggling the isOn variable
    var isOn = false;
    for (var i = 0; i < 20; i++)
    {
        isOn = !isOn;
        blinkingPin.Write(isOn);
        System.Threading.Thread.Sleep(500);
    }
}

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