Hello,
When I perform the below function GetData, Call ReadStatusByte(0, GPIBAddress,
spr%) returns many responses. I would like to understand what these number
mean. Can you expand on this?
The definitions of the Hierarchy is found below. The final call,
ReadStatusByte32, is within the VBIB32 Module.
I get values such as 128, 4.....and am looking for a list of what these all mean.
Thanks,
********************************************************************************
***
Public Function GetData(GPIBAddress, sendstring) As String
ErrorLocation = "GetData"
On Error GoTo errorhandler
Dim ReadThis As String, spr As Integer, ReadTemp As String
Dim ReRead As Integer
Dim ReReadCnt As Integer
'Dim ErrorLocation As String
ErrorLocation = "GetData"
ReReadCnt = 0
ReadThis = ""
ReadThis = Space$(200) 'space$(180)
spr = 0
resend:
Call Send(0, GPIBAddress, sendstring, NLend)
Call ReadStatusByte(0, GPIBAddress, spr%) '144= ok, 208=ok,
128=trouble(empty), 148= ? , 132 = ? 20 = ok 16 = ok 4 = ?
Do While (spr% <> 208 And spr% <> 144 And spr% <> 148 And spr% <> 16 And
spr% <> 20 And spr% <> 132 And ReReadCnt < 20) ' 0 ' give readstatusbyte a
chance to switch
If ReReadCnt > 10 Then ' if readstatusbyte does not correct clear the
device and resend to retrieve data after 10 tries.
Call DevClear(0, GPIBAddress)
Call ibclr(GPIBAddress)
Call ErrorLog("Error Tracker: Read Status Byte returned a " & spr%
& ". DevClr/ibclr handled the error. " & FormatDateTime(Now, vbLongDate) & " ,
" & FormatDateTime(Now, vbLongTime))
ReReadCnt = ReReadCnt + 1
GoTo resend
End If
Call ReadStatusByte(0, GPIBAddress, spr%)
ReReadCnt = ReReadCnt + 1
Loop
Call Receive(0, GPIBAddress, ReadThis, STOPend)
GetData = Trim(ReadThis)
Exit Function
errorhandler:
Call ErrorLog(Err.Number & " , " & Err.Description & " , " & ErrorLocation
& " , " & FormatDateTime(Now, vbLongDate) & " , " & FormatDateTime(Now,
vbLongTime))
Select Case Err.Number
Case 13
msgbox (ErrorLocation)
Case Else
msgbox (Err.Number & ", " & Err.Description & " , " & ErrorLocation)
End Select
Resume Next
End Function
************************************************************************
*********************************************************
Sub ReadStatusByte(ByVal ud As Integer, ByVal addr As Integer, result As
Integer)
Dim tmpresult As Long
' Check to see if GPIB Global variables are registered
If (GPIBglobalsRegistered = 0) Then
Call RegisterGPIBGlobals
End If
' Call the 32-bit DLL.
Call ReadStatusByte32(ud, addr, tmpresult)
result = ConvertLongToInt(tmpresult)
Call copy_ibvars
End Sub
*******************************************************
Declare Sub ReadStatusByte32 Lib "Gpib-32.dll" Alias "ReadStatusByte" (ByVal ud
As Long, ByVal addr As Long, result As Long)
