Hi,
I have an issue with Digital input acquisition , below is my code , I also attached my MAX configuration file
My problem is that I am loading th task from max and when DAQmxLoadTask("DigitalInputs", &DigitalInputsTask); this function runs I receive an error
NON-FATAL RUN-TIME ERROR: "TestDIO.c", line 52, col 5, thread id 0x000000A4: Function DAQmxLoadTask: (return value == -200089 [0xfffcf267]). Measurements: Task name specified conflicts with an existing task name. Task Name: DigitalInputs Status Code: -200089
I don't understand why, it was working before I changed configuration from detect on event change with 1000 samples acquisition to on demand with 1 sample acquistion
#include <formatio.h>
#include <ansi_c.h>
#include <NIDAQmx.h>
//U8 to boolean[8]
#include <cvirte.h>
#include <userint.h>
#include "TestDIO.h"
static int dio;
static int Quit;
typedef char bool8;
int PowerFailureByte;
int EngineFailureByte;
int TemperatureFailureByte;
int BrakeResistorFailureByte;
int OilLevelHighByte;
int OilLevelLowByte;
double OilTankVal=100;
int bit6;
int bit7;
bool8 *ConvertU8to8Bool32Array(unsigned short int U8Val, bool8 BooleanArray[8]);
uInt8 DigitalInputsU8;
bool8 DigitalInputsBooleanArray[8];
uInt8 DigitalReadLine[8];
TaskHandle DigitalInputsTask;
int32 Spc= 1;
int32 Bps=8;
static unsigned short int U8Val;
int main (int argc, char *argv[])
{
if (InitCVIRTE (0, argv, 0) == 0)
return -1; /* out of memory */
if ((dio = LoadPanel (0, "TestDIO.uir", DIO)) < 0)
return -1;
DisplayPanel (dio);
do{
DAQmxLoadTask("DigitalInputs", &DigitalInputsTask);
DAQmxStartTask(DigitalInputsTask);
DAQmxReadDigitalLines(DigitalInputsTask, -1, 10, DAQmx_Val_GroupByChannel, DigitalReadLine, 8, &Spc, &Bps, 0);
SetCtrlVal(dio, DIO_NUMERIC, DigitalInputsU8);
}while(Quit==0);
ConvertU8to8Bool32Array(DigitalInputsU8,DigitalInputsBooleanArray);
PowerFailureByte = DigitalInputsBooleanArray[0];
EngineFailureByte = DigitalInputsBooleanArray[1];
TemperatureFailureByte = DigitalInputsBooleanArray[2];
BrakeResistorFailureByte = DigitalInputsBooleanArray[3];
OilLevelHighByte = DigitalInputsBooleanArray[4];
OilLevelLowByte = DigitalInputsBooleanArray[5];
bit6 = DigitalInputsBooleanArray[6];
bit7 = DigitalInputsBooleanArray[7];
SetCtrlVal(dio, DIO_LED_bit_1,PowerFailureByte);
SetCtrlVal(dio, DIO_LED_bit_2,EngineFailureByte);
SetCtrlVal(dio, DIO_LED_bit_3,TemperatureFailureByte);
SetCtrlVal(dio, DIO_LED_bit_4,BrakeResistorFailureByte);
SetCtrlVal(dio, DIO_LED_bit_5,OilLevelHighByte);
SetCtrlVal(dio, DIO_LED_bit_6,OilLevelLowByte);
SetCtrlVal(dio, DIO_LED_bit_7,bit6);
SetCtrlVal(dio, DIO_LED_bit_8,bit7);
ProcessSystemEvents();
RunUserInterface ();
DiscardPanel (dio);
return 0;
}
int CVICALLBACK QuitCallback (int panel, int control, int event,
void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
case EVENT_COMMIT:
Quit=1;
QuitUserInterface(0);
break;
}
return 0;
}
bool8 *ConvertU8to8Bool32Array(unsigned short int U8Val, bool8 BooleanArray[8])
{
int i;
int Rest=0;
for(i=7; i>=0; i--)
{
Rest=U8Val-(pow(2,i));
if (Rest<0)
{
BooleanArray[7-i]=0;
Rest=U8Val;
}
else
{
BooleanArray[7-i]=1;
U8Val= Rest;
}
}
return BooleanArray;
}
Thanks
