i am using a PCI NI6509 in my tester to write/read from a handler. But i am unable to read the correct digital signal that i set. Below are the functions that i used for write/read a single data line:
private void WriteLine(string line, bool data)
{
using (Task digitalWriteTask = new Task())
{
DOChannels.CreateChannel(line, "", ChannelLineGrouping.OneChannelForAllLines);
DigitalSingleChannelWriter writer = new DigitalSingleChannelWriter(digitalWriteTask.Stream); writer.WriteSingleSampleSingleLine(true, data)
}
}
private bool ReadSingleLine(string line)
{
bool readData;
Task myTask;
DigitalSingleChannelReader myDigitalReader;
myTask = new Task();
myTask.DIChannels.CreateChannel( line, "", ChannelLineGrouping.OneChannelForAllLines);
myDigitalReader = new DigitalSingleChannelReader(myTask.Stream);
readData = myDigitalReader.ReadSingleSampleSingleLine();
return readData;
}
when i tried to perform a write line and read back. The read signal is always high.
For example:
WriteLine("Dev1/Port5/line2", false);
bool data = ReadSingleLine("Dev1/Port5/line2")
when i tried to probe on "Dev1/Port5/line2" after i perform the write line, i can see the signal on port5:line2 is low. But immediately after i execute the ReadSingleline function, i found out that the result return a high instead of low.
May i know isn't any problem with my function? May anyone advise me on this? Thanks a lot.
