Help using GHI extender with OneWire library in MF 4.2 QFE2

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1

Hello. I am new to the .NET Gadgeteers and Microframework.
I am trying to use the OneWire library in MF 4.2 QFE2 with GHI Electronics extender.
I have the following hardware:

Mountaineer Ethernet Mainboard
GHIElectronics extender
MF 4.2 QFE2

I am using the code example from TinyCLR for GHI SDK 4.2:
public static void Main()
{
// Change this your correct pin!
OutputPort myPin = new OutputPort((Cpu.Pin)EMX.Pin.IO4, false);
OneWire ow = new OneWire(myPin);
ushort temperature;

In my application, I am using pin 3 on the extender, with the following code…

      GT.Interfaces.DigitalOutput owPin = extender.SetupDigitalOutput(GT.Socket.Pin.Three, false);

My question is, how can I use the GT.Interfaces.DigitalOutput interface with the Microsoft.Hardware.OutputPort class? Any help would be appreciated.

2

Welcome to the forum!

Something like this:


GT.Socket socket = GT.Socket.GetSocket(extender.ExtenderSocketNumber, false, extender, null);
OutputPort myPin = new OutputPort(socket.CpuPins[3], false);
OneWire ow = new OneWire(myPin);
3

When using the following code, the mainboard locks when it performs a 1-Wire bus reset (ow.TouchReset()), and I must use MFDeploy to erase deployment. in order to get the board back to a functional state.

The output window shows: A first chance exception of type ‘System.NotSupportedException’ occurred in MountaineerTest1.exe

Any thoughts would be appreciated.

       GT.Socket socket = GT.Socket.GetSocket(extender.ExtenderSocketNumber, false, extender, null);
        OutputPort myPin = new OutputPort(socket.CpuPins[3], false);
        OneWire ow = new OneWire(myPin);

        ushort temperature;

        // read every second
        while (true)
        {
            if (ow.TouchReset() > 0)                   {
                ow.WriteByte(0xCC);     // Skip ROM, we only have one device
                ow.WriteByte(0x44);     // Start temperature conversion
4

Thank you for the tip. Here is the repost…

When using the following code, the mainboard locks when it performs a 1-Wire bus reset (ow.TouchReset()), and I must use MFDeploy to erase deployment. in order to get the board back to a functional state.

The output window shows: A first chance exception of type ‘System.NotSupportedException’ occurred in MountaineerTest1.exe

Any thoughts would be appreciated.

public void OneWire()
        {
 
            GT.Socket socket = GT.Socket.GetSocket(extender.ExtenderSocketNumber, false, extender, null);
            OutputPort myPin = new OutputPort(socket.CpuPins[3], false);
            OneWire ow = new OneWire(myPin);

            ushort temperature;

            // read every second
            while (true)
            {
                if (ow.TouchReset() > 0)    // THIS IS THE LINE WHICH PRODUCES
                                                          // A first chance exception of type 'System.NotSupportedException' occurred in MountaineerTest1.exe
                {
                    ow.WriteByte(0xCC);     // Skip ROM, we only have one device
                    ow.WriteByte(0x44);     // Start temperature conversion

                    while (ow.ReadByte() == 0) ;   // wait while busy

                    ow.TouchReset();
                    ow.WriteByte(0xCC);     // skip ROM
                    ow.WriteByte(0xBE);     // Read Scratchpad

                    temperature = (byte)ow.ReadByte();            // LSB 
                    temperature |= (ushort)(ow.ReadByte() << 8); // MSB

                    Debug.Print("Temperature: " + temperature / 16);
                    Thread.Sleep(1000);
                }
                else
                {
                    Debug.Print("Device is not detected.");
                }

                Thread.Sleep(1000);
            }
        }