Rif.: 6509 - Read and Write c#

[SimoneMarchettiEDA]

Hi,

I have a problem with read implementation. I explain you.

I need to read EEprom and so: 3 pin (chipselect, DI, clock) set output mode and 1 set input (DO). 

I initialize read port-pin: 

private struct PortPinSettingRead
 {
    public DigitalSingleChannelReader reader;
    public Task                       digitalInputReadTask;
    public UInt32                     pin;
 }
PortPinSettingRead portPinSettingRead;
portPinSettingRead.digitalInputReadTask = new Task();
portPinSettingRead.digitalInputReadTask.DIChannels.CreateChannel("dev1/port11/line3", "", ChannelLineGrouping.OneChannelForEachLine);
portPinSettingRead.digitalInputReadTask.Control(TaskAction.Verify);
portPinSettingRead.reader = new DigitalSingleChannelReader(portPinSettingRead.digitalInputReadTask.Stream);

//READING
public int readDI(){
 try
 {
      return portPinSettingRead.reader.ReadSingleSamplePortInt32();
 }
 catch (Exception ex) 
 {
    System.Console.WriteLine(ex.Message);
    return -1;
 }
} 

I see by oscilloscope, that when I call readDI() function, the output pin go to 0.

Is it possible? 

Thank you

[Lamber_86]

Hello chino5,

it's actually a strange behavior, but i would suggest you to try the DAQmx C# examples that you can find into C:\Users\Public\Documents\National Instruments\NI-DAQ\Examples\DotNET4.5.1\Digital

Do you notice the same behavior?