Remarks

Sc16is752
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

private Sc16is752? _expander = null;

private ISerialPort? _expanderPort = null;
private ISerialPort? _nativePort = null;

private const int Rate = 9600;

public override async Task Initialize()
{
    // NOTE: This sample connects PortA on the expander back to COM1 on the F7Feather
    Resolver.Log.Info("Initialize...");

    var address = Sc16is7x2.Addresses.Address_0x4D;

    try
    {
        _expander = new Sc16is752(
            Device.CreateI2cBus(),
            new Meadow.Units.Frequency(1.8432, Meadow.Units.Frequency.UnitType.Megahertz),
            address);

        _expanderPort = _expander.PortA.CreateSerialPort(Rate);
        _nativePort = Device.PlatformOS.GetSerialPortName("com1")?.CreateSerialPort(Rate);
    }
    catch (Exception ex)
    {
        Resolver.Log.Error($"Failed to initialize 0x{(byte)address:X2}: {ex.Message}");
        await Task.Delay(1000);
    }
}

public override Task Run()
{
    if (_expander == null || _expanderPort == null || _nativePort == null)
    {
        return Task.CompletedTask;
    }

    Task.Run(() => PingReply(_expanderPort, _nativePort));

    while (true)
    {
        Thread.Sleep(1000);
    }
}

private async Task PingReply(ISerialPort portA, ISerialPort portB)
{
    var readBuffer = new byte[64];

    Resolver.Log.Info("Opening ports...");
    portA.Open();
    portB.Open();

    var abMessage = "ping\n";
    var baMessage = "reply\n";
    var count = 0;

    while (true)
    {
        try
        {
            // A -> B
            Resolver.Log.Info($"TEST A->B");
            var messageAB = Encoding.ASCII.GetBytes(abMessage);
            Resolver.Log.Info($"Writing {messageAB.Length} bytes on A...");
            Resolver.Log.Info($"  {BitConverter.ToString(messageAB)}");

            portA.Write(messageAB);

            Resolver.Log.Info($"Reading on B...");
            count = 0;
            while (count < messageAB.Length)
            {
                count += portB.Read(readBuffer, count, messageAB.Length);
            }

            Resolver.Log.Info($"Read {count} bytes on B");
            Resolver.Log.Info($"  {BitConverter.ToString(readBuffer, 0, count)}");

            var rxString = Encoding.ASCII.GetString(readBuffer, 0, count);
            Resolver.Log.Info($"A sent: {abMessage}");
            Resolver.Log.Info($"B received: {rxString}\n");


            // B -> A
            Resolver.Log.Info($"TEST B->A");
            var messageBA = Encoding.ASCII.GetBytes(baMessage);
            Resolver.Log.Info($"Responding with {messageBA.Length} bytes on B...");
            Resolver.Log.Info($"  {BitConverter.ToString(messageBA)}");

            portB.Write(messageBA);
            Resolver.Log.Info($"Reading on A...");
            count = 0;
            while (count < messageBA.Length)
            {
                count += portA.Read(readBuffer, count, messageBA.Length);
            }

            Resolver.Log.Info($"Read {count} bytes on A");
            Resolver.Log.Info($"  {BitConverter.ToString(readBuffer, 0, count)}");

            rxString = Encoding.ASCII.GetString(readBuffer, 0, count);
            Resolver.Log.Info($"B sent: {baMessage}");
            Resolver.Log.Info($"A received: {rxString}\n");


            await Task.Delay(30000);
        }
        catch (Exception ex)
        {
            Resolver.Log.Error($"Test error: {ex.Message}");
            await Task.Delay(5000);
        }
    }
}

Sample project(s) available on GitHub

Characteristic	Locus
Inheritance	object Sc16is7x2 > Sc16is752
Implements	ISerialController II2cPeripheral ISpiPeripheral
Inherited Members	Sc16is7x2.PortA Sc16is7x2.PortB Sc16is7x2.CreateSerialPort(SerialPortName, int, int, Parity, StopBits, int) Sc16is7x2.CreateRs485SerialPort(Sc16is7x2.Sc16SerialPortName, int, int, Parity, StopBits, bool) Sc16is7x2.DefaultI2cAddress Sc16is7x2.MaxI2cBusSpeed Sc16is7x2.DefaultSpiBusMode Sc16is7x2.DefaultSpiBusSpeed Sc16is7x2.SpiBusMode Sc16is7x2.SpiBusSpeed object.Equals(object) object.Equals(object, object) object.GetHashCode() object.GetType() object.MemberwiseClone() object.ReferenceEquals(object, object) object.ToString()
Namespace	Meadow.Foundation.ICs.IOExpanders
Assembly	Sc16is7x2.dll

Syntax

public class Sc16is752 : Sc16is7x2, ISerialController, II2cPeripheral, ISpiPeripheral

Constructors

Sc16is752(II2cBus, Frequency, Addresses, IDigitalInterruptPort?)

Declaration

public Sc16is752(II2cBus i2cBus, Frequency oscillatorFrequency, Sc16is7x2.Addresses address = Addresses.Address_0x48, IDigitalInterruptPort? irq = null)

Parameters

Type	Name	Description
II2cBus	i2cBus
Frequency	oscillatorFrequency
Sc16is7x2.Addresses	address
IDigitalInterruptPort	irq

Remarks

Sc16is752
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

private Sc16is752? _expander = null;

private ISerialPort? _expanderPort = null;
private ISerialPort? _nativePort = null;

private const int Rate = 9600;

public override async Task Initialize()
{
    // NOTE: This sample connects PortA on the expander back to COM1 on the F7Feather
    Resolver.Log.Info("Initialize...");

    var address = Sc16is7x2.Addresses.Address_0x4D;

    try
    {
        _expander = new Sc16is752(
            Device.CreateI2cBus(),
            new Meadow.Units.Frequency(1.8432, Meadow.Units.Frequency.UnitType.Megahertz),
            address);

        _expanderPort = _expander.PortA.CreateSerialPort(Rate);
        _nativePort = Device.PlatformOS.GetSerialPortName("com1")?.CreateSerialPort(Rate);
    }
    catch (Exception ex)
    {
        Resolver.Log.Error($"Failed to initialize 0x{(byte)address:X2}: {ex.Message}");
        await Task.Delay(1000);
    }
}

public override Task Run()
{
    if (_expander == null || _expanderPort == null || _nativePort == null)
    {
        return Task.CompletedTask;
    }

    Task.Run(() => PingReply(_expanderPort, _nativePort));

    while (true)
    {
        Thread.Sleep(1000);
    }
}

private async Task PingReply(ISerialPort portA, ISerialPort portB)
{
    var readBuffer = new byte[64];

    Resolver.Log.Info("Opening ports...");
    portA.Open();
    portB.Open();

    var abMessage = "ping\n";
    var baMessage = "reply\n";
    var count = 0;

    while (true)
    {
        try
        {
            // A -> B
            Resolver.Log.Info($"TEST A->B");
            var messageAB = Encoding.ASCII.GetBytes(abMessage);
            Resolver.Log.Info($"Writing {messageAB.Length} bytes on A...");
            Resolver.Log.Info($"  {BitConverter.ToString(messageAB)}");

            portA.Write(messageAB);

            Resolver.Log.Info($"Reading on B...");
            count = 0;
            while (count < messageAB.Length)
            {
                count += portB.Read(readBuffer, count, messageAB.Length);
            }

            Resolver.Log.Info($"Read {count} bytes on B");
            Resolver.Log.Info($"  {BitConverter.ToString(readBuffer, 0, count)}");

            var rxString = Encoding.ASCII.GetString(readBuffer, 0, count);
            Resolver.Log.Info($"A sent: {abMessage}");
            Resolver.Log.Info($"B received: {rxString}\n");


            // B -> A
            Resolver.Log.Info($"TEST B->A");
            var messageBA = Encoding.ASCII.GetBytes(baMessage);
            Resolver.Log.Info($"Responding with {messageBA.Length} bytes on B...");
            Resolver.Log.Info($"  {BitConverter.ToString(messageBA)}");

            portB.Write(messageBA);
            Resolver.Log.Info($"Reading on A...");
            count = 0;
            while (count < messageBA.Length)
            {
                count += portA.Read(readBuffer, count, messageBA.Length);
            }

            Resolver.Log.Info($"Read {count} bytes on A");
            Resolver.Log.Info($"  {BitConverter.ToString(readBuffer, 0, count)}");

            rxString = Encoding.ASCII.GetString(readBuffer, 0, count);
            Resolver.Log.Info($"B sent: {baMessage}");
            Resolver.Log.Info($"A received: {rxString}\n");


            await Task.Delay(30000);
        }
        catch (Exception ex)
        {
            Resolver.Log.Error($"Test error: {ex.Message}");
            await Task.Delay(5000);
        }
    }
}

Sample project(s) available on GitHub

Sc16is752(ISpiBus, Frequency, IDigitalOutputPort?, IDigitalInterruptPort?)

Declaration

public Sc16is752(ISpiBus spiBus, Frequency oscillatorFrequency, IDigitalOutputPort? chipSelect = null, IDigitalInterruptPort? irq = null)

Parameters

Type	Name	Description
ISpiBus	spiBus
Frequency	oscillatorFrequency
IDigitalOutputPort	chipSelect
IDigitalInterruptPort	irq

Remarks

Sc16is752
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

private Sc16is752? _expander = null;

private ISerialPort? _expanderPort = null;
private ISerialPort? _nativePort = null;

private const int Rate = 9600;

public override async Task Initialize()
{
    // NOTE: This sample connects PortA on the expander back to COM1 on the F7Feather
    Resolver.Log.Info("Initialize...");

    var address = Sc16is7x2.Addresses.Address_0x4D;

    try
    {
        _expander = new Sc16is752(
            Device.CreateI2cBus(),
            new Meadow.Units.Frequency(1.8432, Meadow.Units.Frequency.UnitType.Megahertz),
            address);

        _expanderPort = _expander.PortA.CreateSerialPort(Rate);
        _nativePort = Device.PlatformOS.GetSerialPortName("com1")?.CreateSerialPort(Rate);
    }
    catch (Exception ex)
    {
        Resolver.Log.Error($"Failed to initialize 0x{(byte)address:X2}: {ex.Message}");
        await Task.Delay(1000);
    }
}

public override Task Run()
{
    if (_expander == null || _expanderPort == null || _nativePort == null)
    {
        return Task.CompletedTask;
    }

    Task.Run(() => PingReply(_expanderPort, _nativePort));

    while (true)
    {
        Thread.Sleep(1000);
    }
}

private async Task PingReply(ISerialPort portA, ISerialPort portB)
{
    var readBuffer = new byte[64];

    Resolver.Log.Info("Opening ports...");
    portA.Open();
    portB.Open();

    var abMessage = "ping\n";
    var baMessage = "reply\n";
    var count = 0;

    while (true)
    {
        try
        {
            // A -> B
            Resolver.Log.Info($"TEST A->B");
            var messageAB = Encoding.ASCII.GetBytes(abMessage);
            Resolver.Log.Info($"Writing {messageAB.Length} bytes on A...");
            Resolver.Log.Info($"  {BitConverter.ToString(messageAB)}");

            portA.Write(messageAB);

            Resolver.Log.Info($"Reading on B...");
            count = 0;
            while (count < messageAB.Length)
            {
                count += portB.Read(readBuffer, count, messageAB.Length);
            }

            Resolver.Log.Info($"Read {count} bytes on B");
            Resolver.Log.Info($"  {BitConverter.ToString(readBuffer, 0, count)}");

            var rxString = Encoding.ASCII.GetString(readBuffer, 0, count);
            Resolver.Log.Info($"A sent: {abMessage}");
            Resolver.Log.Info($"B received: {rxString}\n");


            // B -> A
            Resolver.Log.Info($"TEST B->A");
            var messageBA = Encoding.ASCII.GetBytes(baMessage);
            Resolver.Log.Info($"Responding with {messageBA.Length} bytes on B...");
            Resolver.Log.Info($"  {BitConverter.ToString(messageBA)}");

            portB.Write(messageBA);
            Resolver.Log.Info($"Reading on A...");
            count = 0;
            while (count < messageBA.Length)
            {
                count += portA.Read(readBuffer, count, messageBA.Length);
            }

            Resolver.Log.Info($"Read {count} bytes on A");
            Resolver.Log.Info($"  {BitConverter.ToString(readBuffer, 0, count)}");

            rxString = Encoding.ASCII.GetString(readBuffer, 0, count);
            Resolver.Log.Info($"B sent: {baMessage}");
            Resolver.Log.Info($"A received: {rxString}\n");


            await Task.Delay(30000);
        }
        catch (Exception ex)
        {
            Resolver.Log.Error($"Test error: {ex.Message}");
            await Task.Delay(5000);
        }
    }
}

Sample project(s) available on GitHub

Sc16is752(Frequency, IDigitalInterruptPort?)

Declaration

public Sc16is752(Frequency oscillatorFrequency, IDigitalInterruptPort? irq)

Parameters

Type	Name	Description
Frequency	oscillatorFrequency
IDigitalInterruptPort	irq

Remarks

Sc16is752
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

private Sc16is752? _expander = null;

private ISerialPort? _expanderPort = null;
private ISerialPort? _nativePort = null;

private const int Rate = 9600;

public override async Task Initialize()
{
    // NOTE: This sample connects PortA on the expander back to COM1 on the F7Feather
    Resolver.Log.Info("Initialize...");

    var address = Sc16is7x2.Addresses.Address_0x4D;

    try
    {
        _expander = new Sc16is752(
            Device.CreateI2cBus(),
            new Meadow.Units.Frequency(1.8432, Meadow.Units.Frequency.UnitType.Megahertz),
            address);

        _expanderPort = _expander.PortA.CreateSerialPort(Rate);
        _nativePort = Device.PlatformOS.GetSerialPortName("com1")?.CreateSerialPort(Rate);
    }
    catch (Exception ex)
    {
        Resolver.Log.Error($"Failed to initialize 0x{(byte)address:X2}: {ex.Message}");
        await Task.Delay(1000);
    }
}

public override Task Run()
{
    if (_expander == null || _expanderPort == null || _nativePort == null)
    {
        return Task.CompletedTask;
    }

    Task.Run(() => PingReply(_expanderPort, _nativePort));

    while (true)
    {
        Thread.Sleep(1000);
    }
}

private async Task PingReply(ISerialPort portA, ISerialPort portB)
{
    var readBuffer = new byte[64];

    Resolver.Log.Info("Opening ports...");
    portA.Open();
    portB.Open();

    var abMessage = "ping\n";
    var baMessage = "reply\n";
    var count = 0;

    while (true)
    {
        try
        {
            // A -> B
            Resolver.Log.Info($"TEST A->B");
            var messageAB = Encoding.ASCII.GetBytes(abMessage);
            Resolver.Log.Info($"Writing {messageAB.Length} bytes on A...");
            Resolver.Log.Info($"  {BitConverter.ToString(messageAB)}");

            portA.Write(messageAB);

            Resolver.Log.Info($"Reading on B...");
            count = 0;
            while (count < messageAB.Length)
            {
                count += portB.Read(readBuffer, count, messageAB.Length);
            }

            Resolver.Log.Info($"Read {count} bytes on B");
            Resolver.Log.Info($"  {BitConverter.ToString(readBuffer, 0, count)}");

            var rxString = Encoding.ASCII.GetString(readBuffer, 0, count);
            Resolver.Log.Info($"A sent: {abMessage}");
            Resolver.Log.Info($"B received: {rxString}\n");


            // B -> A
            Resolver.Log.Info($"TEST B->A");
            var messageBA = Encoding.ASCII.GetBytes(baMessage);
            Resolver.Log.Info($"Responding with {messageBA.Length} bytes on B...");
            Resolver.Log.Info($"  {BitConverter.ToString(messageBA)}");

            portB.Write(messageBA);
            Resolver.Log.Info($"Reading on A...");
            count = 0;
            while (count < messageBA.Length)
            {
                count += portA.Read(readBuffer, count, messageBA.Length);
            }

            Resolver.Log.Info($"Read {count} bytes on A");
            Resolver.Log.Info($"  {BitConverter.ToString(readBuffer, 0, count)}");

            rxString = Encoding.ASCII.GetString(readBuffer, 0, count);
            Resolver.Log.Info($"B sent: {baMessage}");
            Resolver.Log.Info($"A received: {rxString}\n");


            await Task.Delay(30000);
        }
        catch (Exception ex)
        {
            Resolver.Log.Error($"Test error: {ex.Message}");
            await Task.Delay(5000);
        }
    }
}

Sample project(s) available on GitHub