public int getButtons() throws Exception {
int[] intIOType = {0};
int[] intChannel = {0};
double[] dblValue = {0};
// Variables to satisfy certain method signatures
int[] dummyInt = {0};
double[] dummyDouble = {0};
long lngIteration;
int intErrorcode;
int ValueDIPort = 0;
intErrorcode = LJUD.GoOne(intHandle[0]);
ErrorHandler(intErrorcode, 0, new Exception());
intErrorcode =
LJUD.GetFirstResult(intHandle[0], intIOType, intChannel, dblValue, dummyInt, dummyDouble);
ErrorHandler(intErrorcode, 0, new Exception());
lngIteration = 0; // Used by the error handling function.
while (intErrorcode < LJUD.LJE_MIN_GROUP_ERROR) {
if (intIOType[0] == LJUDJavaConstants.LJ_ioGET_DIGITAL_PORT) {
ValueDIPort = (int) dblValue[0];
}
intErrorcode =
LJUD.GetNextResult(intHandle[0], intIOType, intChannel, dblValue, dummyInt, dummyDouble);
if (intErrorcode != LJUD.LJE_NO_MORE_DATA_AVAILABLE) {
ErrorHandler(intErrorcode, lngIteration, new Exception());
}
lngIteration++;
}
return ValueDIPort;
}
public static void ErrorHandler(int Errorcode, long Iteration, Exception excep) {
byte[] err = new byte[255];
if (Errorcode != LJUD.LJE_NOERROR) {
LJUD.ErrorToString(Errorcode, err);
System.out.println("Error number = " + Errorcode);
System.out.println("Error string = " + new String(err));
System.out.println("Iteration = " + Iteration);
System.out.println("Stack Trace : ");
excep.printStackTrace();
if (Errorcode > LJUD.LJE_MIN_GROUP_ERROR) {
// Quit if this is a group error.
System.exit(1);
}
}
}
public MLSButtons() {
// System.out.println("Button Constructor");
try {
System.loadLibrary("LJUDJava");
} catch (UnsatisfiedLinkError e) {
System.err.println("Library load failed. Where is LJUDJava.dll?\n" + e);
System.exit(1);
}
// Open the first found LabJack.
try {
intErrorcode = LJUD.OpenLabJack(LJUD.LJ_dtU3, LJUD.LJ_ctUSB, "1", 1, intHandle);
if (intErrorcode == LJUD.LJE_NOERROR) {
labjackOpen = true;
} else {
labjackOpen = false;
return;
}
ErrorHandler(intErrorcode, 0, new Exception());
} catch (Exception elj) {
labjackOpen = false;
return;
}
// factory default condition.
intErrorcode = LJUD.ePut(intHandle[0], LJUD.LJ_ioPIN_CONFIGURATION_RESET, 0, 0, 0);
ErrorHandler(intErrorcode, 0, new Exception());
// Configure quickSample.
intErrorcode =
LJUD.ePut(intHandle[0], LJUD.LJ_ioPUT_CONFIG, LJUD.LJ_chAIN_RESOLUTION, quickSample, 0);
ErrorHandler(intErrorcode, 0, new Exception());
// Configure longSettling.
intErrorcode =
LJUD.ePut(intHandle[0], LJUD.LJ_ioPUT_CONFIG, LJUD.LJ_chAIN_SETTLING_TIME, longSettling, 0);
ErrorHandler(intErrorcode, 0, new Exception());
// Configure the necessary lines as analog.
intErrorcode = LJUD.ePut(intHandle[0], LJUD.LJ_ioPUT_ANALOG_ENABLE_PORT, 0, 0, 16);
ErrorHandler(intErrorcode, 0, new Exception());
// Now add requests that will be processed every iteration of the loop.
// Read CIO digital lines.
intErrorcode = LJUD.AddRequest(intHandle[0], LJUD.LJ_ioGET_DIGITAL_PORT, 0, 0, 9, 0);
ErrorHandler(intErrorcode, 0, new Exception());
System.err.println("End of LabJack initialization");
}