ScriptReadAppSignal Method - neoVI API

This method is used to read an application signal from a script running on a neoVI device.

C/C++ Declare

int _stdcall icsneoScriptReadAppSignal(void * hObject, unsigned int iIndex, double *dValue);

Visual Basic .NET Declare

Public Declare Function icsneoScriptReadAppSignal Lib “icsneo40.dll” (ByVal hObject As IntPtr, ByVal iIndex As UInt32, ByRef dValue As Double) As Int32

C# Declare

[DllImport(“icsneo40.dll”)] public static extern Int32 icsneoScriptReadAppSignal(IntPtr hObject, UInt32 iIndex, ref double dValue);

Parameters

hObject

[in] Specifies the driver object created by OpenNeoDevice.

unsigned int iIndex

[in] The index value of the transmit message to read

double *dValue

[in] Contains the current value of the application signal.

Return Values

1 if the function succeeded. 0 if it failed for any reason. GetLastAPIError must be called to obtain the specific error. The errors that can be generated by this function are:

NEOVI_ERROR_DLL_NEOVI_NO_RESPONSE = 75

NEOVI_ERROR_DLL_SCRIPT_INVALID_APPSIG_INDEX = 225

NEOVI_ERROR_DLL_SCRIPT_NO_SCRIPT_RUNNING = 226

Remarks

The script containing the specified application signal must have been successfully downloaded to the neoVI using ScriptLoadScript. The script must also have been started using ScriptStart. This function will fail if ScriptStop has been called. The valid index values for application signals within a script can be found in the cmvspy.vs3cmb.h file that is produced by Vehicle Spy. Please see Vehicle Spy documentation.

Examples

C/C++ Example:

int iRetVal;
unsigned long lLastErrNum;
double dValue = 0;

iRetVal = icsneoScriptReadAppSignal(hObject, App_Signal_1, &dValue);
if(iRetVal == 0)
{
    printf("\nFailed to read the application signal.);
}
else
{
    printf("\nApplication signal = %f\r\n", dValue);
}

C# Example:

Int32 iResult;
Double ValueToSet=0;

//Read App signal
iResult = icsNeoDll.icsneoScriptReadAppSignal(m_hObject, Convert.ToUInt32(cboAppSig.SelectedIndex),ref ValueToSet);

if (iResult == 0)
{
    txtAppSigVal.Text = "Problem!";
}
else
{
    txtAppSigVal.Text = Convert.ToString(ValueToSet);
}

Visual Basic .NET Example:

Dim iResult As Int32
Dim ValueToSet As Double

'//Read App signal
iResult = icsneoScriptReadAppSignal(m_hObject, Convert.ToUInt32(cboAppSig.SelectedIndex), ValueToSet)

If iResult = 0 Then
    txtAppSigVal.Text = "Problem!"
Else
    txtAppSigVal.Text = Convert.ToString(ValueToSet)
End If