Help: cut with NIDAQmx nicaiu Delphi DAQmxCreateAIVoltageChan returns in a DLL

The main application error code is as follows:

 
Procedure TForm1. Button1Click (Sender: TObject); 
Var 
TaskHandle: Longint; 

IntErrCode: Integer; 
The begin 
//ErrorNULLPtr=$FFFCF064; 
//ErrorInvalidDeviceID=$FFFCF1E4;//- 200220 
//ErrorInvalidTask=$FFFCF268;//- 200088 

//c: taskHandle 0 x6deb1cc0 void * 
//Delphi: taskHandle 0 x6deb1cc0 
//c: & amp; TaskHandle 0 x0012ff54 void * * 
//Delphi: @ TaskHandle 12 f58c 

IntErrCode:=DAQmxCreateTask (' @ TaskHandle); 
Memo1. Lines. The Add (+ Format 'ErrCode:' (' % x '[intErrCode])); 

//c: taskhandle=0 x6deb1cc0 
//Delphi: deb1cc0 taskhandle $6//1844124864 
FFFFFFFF////c: DAQmx_Val_Cfg_Default - 1 Default 
//Delphi: DAQmx_Val_Cfg_Default=$FFFFFFFF 
//c: 10348 c/286/DAQmx_Val_Volts Volts 
//Delphi: DAQmx_Val_VoltageUnits1_Volts=$0000286 c 

IntErrCode:=DAQmxCreateAIVoltageChan (taskHandle, 'Dev1/ai0', ' ', 
DAQmx_Val_Cfg_Default, 10.0, 10.0, DAQmx_Val_VoltageUnits1_Volts, "); 
Memo1. Lines. The Add (+ Format 'ErrCode:' (' % x '[intErrCode])); 

end; 

End.

When running DAQmxCreateTask intErrCode returns 0, is normal;
DAQmxCreateAIVoltageChan running to the calling function, the return to FFFCF268 intErrCode, namely: - 200088, I checked the, is reported to ErrorInvalidTask error, the prototype function declaration (XNIDAQmx. Pas) statement is as follows:

 unit XNIDAQmx; 

Interface 
USES the 
Windows, ActiveX, Classes, Graphics, StdVCL, Variants, SysUtils, XNIDAQmxCAPI_TLB; 

//typedef void * TaskHandle; 
//int32 __CFUNC DAQmxCreateTask (const char taskName [], TaskHandle * TaskHandle); 
The function DAQmxCreateTask (taskName: PChar; TaskHandle: PLongint) : Longint; Stdcall; External 'nicaiu. DLL'; 

//int32 __CFUNC DAQmxCreateAIVoltageChan 
//(TaskHandle TaskHandle, const char physicalChannel [], const char nameToAssignToChannel [], 
//int32 terminalConfig, float64 minVal, float64 very much, 
//int32 units, const char customScaleName []); 
//DAQmxCreateAIVoltageChan (taskHandle, "the WLS - 13 bc5dc/ai0", "", DAQmx_Val_Cfg_Default, 10.0, 10.0, DAQmx_Val_Volts, NULL)) 
The function DAQmxCreateAIVoltageChan (taskHandle: Longint; PhysicalChannel: PChar; 
NameToAssignToChannel: PChar; TerminalConfig: DAQmxInputTermCfg; 
MinVal: Double; Very much: Double; Units: DAQmxVoltageUnits2; CustomScaleName: PChar) : Longint; 
Stdcall; External 'nicaiu. DLL'; 

The function DAQmxCfgSampClkTiming (taskHandle: Longint; Source: PChar; Rate: Double; 
ActiveEdge: DAQmxEdge; SampleMode: DAQmxAcquisitionType; SampsPerChan: Longint) : Longint; Stdcall; External 'nicaiu. DLL'; 
The function DAQmxStartTask (taskHandle: Longint) : Longint; Stdcall; External 'nicaiu. DLL'; 
The function DAQmxReadAnalogF64 (taskHandle: Longint; NumSampsPerChan: Longint; Timeout: Double; 
FillMode: DAQmxFillMode; ReadArray: an array of double; ArraySizeInSamps: Longint; 
SampsPerChanRead: Integer; Reserved: Pointer) : Longint; Stdcall; External 'nicaiu. DLL'; 

The function DAQmxGetErrorString (errorCode: Longint; ErrorString: PChar; 
BufferSize: Longint) : Longint; Stdcall; External 'nicaiu. DLL'; 
The function DAQmxGetExtendedErrorInfo (errorString: PChar; BufferSize: Longint) : Longint; 
Stdcall; External 'nicaiu. DLL';

Debugging for several days, I couldn't find the reason, please help to check the reason for the error, thank you,

CodePudding user response:

You should be not installed acquisition card, to see if your device under Dev1/ai0 if this error will quote this create wrong,