Cobra IO16 and USBHostController Events

NETMF & Gadgeteer
1

I am using IO16 on the Cobra as an ouput:

static OutputPort DIO_PrintHold_O = new OutputPort((Cpu.Pin)FEZ_Pin.Digital.IO16, false);

With the latest firmware I have a problem.

By itself the output operates normally. However, when I subscribe the following event for the USBHostController the IO goes low and becomes unresponsive to the write command.

USBHostController.DeviceConnectedEvent += OnDeviceConnected;

I can not see any connection between the USBHost and IO16 on the schematic. Can anyone shed light on this? Subscribing to any other event for USBHostController is not a problem such as:

USBHostController.DeviceDisconnectedEvent += OnDeviceDisconnected;
USBHostController.DeviceBadConnectionEvent += OnDeviceBadConnectionEvent;

Thanks

2

you mention “the latestfirmware”. Any chance you have a mismatched set of GHI SDK version and firmware with the assemblies you have loaded? Easiest way is to create a brand new project, and copy your code into that.

Having said that, I’m going to update my Cobra and give it a try myself.

3

Repros on my device too.


using System;
using System.Threading;

using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using Microsoft.SPOT.IO;

using GHIElectronics.NETMF.FEZ;
using GHIElectronics.NETMF.USBHost;
using GHIElectronics.NETMF.IO;
using GHIElectronics.NETMF.Hardware;

namespace cobra_test_IO16
{
    public class Program
    {
        public static void Main()
        {
            // Blink board LED

            bool ledState = false;
 
            OutputPort led = new OutputPort((Cpu.Pin)FEZ_Pin.Digital.LED, ledState);
            OutputPort DI1 = new OutputPort((Cpu.Pin)FEZ_Pin.Digital.IO16, false);
            OutputPort DI2 = new OutputPort((Cpu.Pin)FEZ_Pin.Digital.IO17, false);
            OutputPort DI3 = new OutputPort((Cpu.Pin)FEZ_Pin.Digital.IO15, false);

            RemovableMedia.Insert += RemovableMedia_Insert;
            RemovableMedia.Eject += RemovableMedia_Eject;

            // Subscribe to USB events
            // USBHostController.DeviceConnectedEvent += MyDeviceConnectedEvent;

            // Sleep forever

            while (true)
            {
                // Sleep for 500 milliseconds
                Thread.Sleep(2500);

                // toggle LED state
                ledState = !ledState;
                led.Write(ledState);
                DI1.Write(ledState);
                DI2.Write(ledState);
                DI3.Write(ledState);
            }
        }

        static void RemovableMedia_Insert(object sender, MediaEventArgs e)
        {
            Debug.Print("Storage \"" + e.Volume.RootDirectory +
            "\" is inserted.");

        }
        static void RemovableMedia_Eject(object sender, MediaEventArgs e)
        {
            Debug.Print("Storage \"" + e.Volume.RootDirectory +
            "\" is ejected.");
        }


        static void MyDeviceConnectedEvent(USBH_Device device)
        {
            Debug.Print("Device connected...");
            Debug.Print("ID: " + device.ID + ", Interface: " + device.INTERFACE_INDEX + ", Type: " + device.TYPE);
        }

        static void MyDeviceDisconnectedEvent(USBH_Device device)
        {
            Debug.Print("Device disconnected...");
            Debug.Print("ID: " + device.ID + ", Interface: " + device.INTERFACE_INDEX + ", Type: " + device.TYPE);
        }

    }

}

measure voltage on IO15, IO16, IO17 with the above code (with OnDeviceConnected commented out) and it measures 3v3 when the LED is on, then 0 when the LED goes off, then 3v3 etc. Take out the comments and deploy it, IO15 and IO17 work as before but IO16 stays at 0v.

4

Thank you.
Move the USBHostController.DeviceConnectedEvent += MyDeviceConnectedEvent;
to the begining of the program (before creating a Port with IO 16), it should work.
We are looking into the problem now.

5

Any news about this issue?