TE35 Touch Event

Archive
1

Hi,

I’ve just gone through the T35 basic tutorial here GHI Electronics – Where Hardware Meets Software and the code executes and debugs just fine however the touch events are not raised, how can I go about locating the reason for this? The framework is 4.2, device is a fez hydra.

Thanks

2

Give this a try, it should get you started

http://www.tinyclr.com/forum/topic?id=8595

3

Hi Scott_F,

Welcome to the community.

Unfortunately, Analog touch is not implemented in GHI’s 4.2 Framework at this time. Please follow Steven’s link for help on this matter.

4

I like to add a note that calibration is not part of provided code. We are looking to add something by next release this month to handle this.

5

Thanks guys, will give that a try. Out of interest, how come this isn’t automatically ported between framework versions? Were there breaking changes in the framework change?

6

Because we want to improve it.

7

@ Aron,

I’m having an issue w/ the driver. It works fine as a STATIC but if I change it to a normally instanced object I fail on getting Y pin.

Point of failure:

YcoordinatePin = new AnalogInput(Cpu.AnalogChannel.ANALOG_3); // PA20

Error:

Using mainboard GHI Electronics FEZHydra version 1.2
    #### Exception System.InvalidOperationException - CLR_E_INVALID_OPERATION (4) ####
    #### Message: 
    #### Microsoft.SPOT.Hardware.Port::ReservePin [IP: 0000] ####
    #### Microsoft.SPOT.Hardware.AnalogInput::.ctor [IP: 008b] ####
    #### Microsoft.SPOT.Hardware.AnalogInput::.ctor [IP: 0018] ####
    #### GameSlate12Q4POC.T35Touch::.ctor [IP: 0069] ####
    #### GameSlate12Q4POC.Program::KeepGadgeteerHappy [IP: 0004] ####
A first chance exception of type 'System.InvalidOperationException' occurred in Microsoft.SPOT.Hardware.dll
A first chance exception of type 'System.InvalidOperationException' occurred in Microsoft.SPOT.Hardware.dll

My Code:

using System;
using System.Threading;

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


using GHI.OSHW.Hardware;
using GHI.OSHW.Hardware.LowLevel;

namespace HydraTouchTest
{
    public class T35Touch
    {

        #region Variables

        Register TOUCHSCREEN_ADC_CONTROLLER_CHANNEL_DISABLE_REGISTER = new Register(0xFFFD0014);
        private AnalogInput XcoordinatePin;
        private AnalogInput YcoordinatePin;
        private double XcoordinateData = 0;
        private double YcoordinateData = 0;
        private OutputPort XLpin;
        private OutputPort XRpin;
        private OutputPort YUpin;
        private OutputPort YDpin;

        InputPort floatingXRPin;
        InputPort floatingYDpin;

        #endregion

        #region Constructor

        public T35Touch()
        {
            XcoordinatePin = new AnalogInput(Cpu.AnalogChannel.ANALOG_1); // PA18 // pin5
            XcoordinatePin.Scale = 200.0;
            YUpin = new OutputPort(FEZHydra.Pin.PA20, false);// pin4
            YDpin = new OutputPort(FEZHydra.Pin.PB1, true);// pin6
            floatingXRPin = new InputPort(FEZHydra.Pin.PB28, false, Port.ResistorMode.Disabled);// pin7

            YcoordinatePin = new AnalogInput(Cpu.AnalogChannel.ANALOG_3); // PA20
            YcoordinatePin.Scale = 320.0;
            XLpin = new OutputPort(FEZHydra.Pin.PA18, false);
            XRpin = new OutputPort(FEZHydra.Pin.PB28, true);
            floatingYDpin = new InputPort(FEZHydra.Pin.PB1, false, Port.ResistorMode.Disabled);

            new Thread(MonitorTouch).Start();
        }

        #endregion

        #region Touch Monitor

        private void MonitorTouch()
        {
            int iX, iY;

            while (true)
            {
                iX = (int)XcoordinatePin.Read();
                iY = (int)YcoordinatePin.Read();

                if (iX != 0)
                    Debug.Print("Touch: " + iX + "," + iY);


                Thread.Sleep(10);
            }
        }

        #endregion

    }
}
8

Hi Skewworks,

I think it is because you are declaring an Output port along with an Analog port on the same pin (PA20). My original code disposes the pins first.

9

Yeah I totally didn’t notice the same pinage there, it must have been late. :slight_smile:

10

Hi Guys, just wondering if there is any progress getting the touch events into the SDK? I’ve updated to v1.0.3 but it doesn’t look like its in there.

Thanks

11

Has it really be 5 months since T35 displays stopped working on Hydra/G120? :whistle:

Come on guys, you got this!

1 Like
12

This came up in another thread few days ago. This is fixed on Hydra and will be released soon. I am not aware of any problem with G120

13

@ Gus - Aron mentioned looking into the issue on the G120 here: http://www.tinyclr.com/forum/topic?id=9990&page=2#msg102400