GHI.Usb.Host Controller. Curious about using Controller.Reset();

NETMF & Gadgeteer
1

I am using a G130E Dev Board 1.2


using GHI.Usb.Host Controller

//Outside of Main()
Controller.DeviceConnectFailed += Controller_DeviceConnectFailed;
Controller.KeyboardConnected += Controller_KeyboardConnected;

Controller.Start();

// I do not get key press events unless I use the Reset() ?
// I can use Reset either before or after Controller.Start()
// and I get the same results;

Controller.Reset();

private static void Controller_KeyboardConnected(object sender, Keyboard keyboard)
{
	keyboard.Disconnected += keyboard_Disconnected;

	//Key press events
	keyboard.KeyDown += keyboard_KeyDown; 
	keyboard.KeyUp += keyboard_KeyUp;
}
//

I do not receive events
keyboard_KeyDown or keyboard_KeyUp
unless I use Controller.Reset();

I had no idea this was necessary.

Does anyone know why?

1 Like
2

@ willgeorge -
Are you using G120E?
I am not sure because you didn’t push all code. Here is my simple code and tested on 3 keyboards: Accer, Microsoft, Logitech K120. they all working well.

using System;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using GHI.Usb;
using GHI.Usb.Host;
using GHI.Pins;
namespace TestUSBHost_keyboard
{
    public class Program
    {
        static OutputPort led = new OutputPort(G120E.Gpio.P3_27, true); 
        static InputPort button = new InputPort(G120E.Gpio.P0_22, false, Port.ResistorMode.PullUp); 
        public static void InitUSBKeyboard()
        {
            Controller.DeviceConnectFailed += Controller_DeviceConnectFailed;
            Controller.KeyboardConnected += Controller_KeyboardConnected;
            Controller.Start();
            
        }

        static void Controller_DeviceConnectFailed(object sender, EventArgs e)
        {
            Debug.Print("Device connected failed!");
        }
        public static void Main()
        {
            while (button.Read() == true)
            {

                Thread.Sleep(100);
                led.Write(!led.Read());
                
            }
            InitUSBKeyboard();
            Debug.Print("USB Host inited");
            Thread.Sleep(-1);
        }
        private static void Controller_KeyboardConnected(object sender, Keyboard keyboard)
        {
            Debug.Print("Device connected!");
            keyboard.Disconnected += keyboard_Disconnected;

            //Key press events
            keyboard.KeyDown += keyboard_KeyDown;
            keyboard.KeyUp += keyboard_KeyUp;
        }

        static void keyboard_KeyUp(Keyboard sender, Keyboard.KeyboardEventArgs args)
        {
            Debug.Print("Up: " + args.ASCII);
        }

        static void keyboard_KeyDown(Keyboard sender, Keyboard.KeyboardEventArgs args)
        {
            Debug.Print( "Down: " + args.ASCII);
        }

        static void keyboard_Disconnected(BaseDevice sender, EventArgs e)
        {
            Debug.Print("Device disconnected.");
        }
    }
}
3

@ Dat -

Thanks much… I will try your code and see what happens.
(Though I cannot do it today)

I was using a G120E Dev Board 1.2

The keyboards worked but I only got the key press events if I used the reset first.

4

@ willgeorge -

Problem is in my code, I didn’t use reset function.