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Beispielprogramm für GPIB-1, PCIGPIB-1, USB-GPIB-1
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Beispiel Quelltext für Lotus Notes
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' gpib.bas : Sample project for using Lotus Notes with the GPIB-1, PCIGPIB and USB GPIB Modules
'
' Author: Michael Reimer, QUANCOM Informationssysteme GmbH, Germany
'
' Website: http://www.quancom.de
'
' Information:
'
' GPIB PCI Controller http://www.quancom.de/qprod01/deu/pb/ieee_488_gpib_karte.htm
' GPIB ISA Controller http://www.quancom.de/qprod01/deu/pb/GPIB_1.htm
' GPIB USB Controller http://www.quancom.de/qprod01/deu/pb/usb_gpib_1.htm
'
' When installing the QLIB ( QUANCOM Driver Library ) you will find the QLIB.NSF
' Lotus Sample Database in the folder d:\program files\quancom\qlib32\gpib\lotus .
'
' To use the QLIB Commands in your source, do the following:
' Step 0: Install the QLIB ( QUANCOM Driver Library )
' Step 1: Copy Script Library "qlib" to your database
' Step 2: Add Statement Use "qlib" to section Globals->Options
'
' Change the address to the appropriate address for your
' device ( normally set by DIP-Switches on the back side )
'
' ------------------------------------------------------------------
' PART 1: Writing a string to a GPIB / HPIB / IEEE488 DMM ( The DMM
' is a listener ) from Lotus Notes.
' Listener: A device capable of receiving data over the interface
' when addressed to Listen by the active controller. Examples of
' such devices are printers, programmable power supplies, or any
' other programmable instrument. There can be up to 14 Listeners on
' the GPIB Bus at one time.
' ------------------------------------------------------------------
Sub SendString()
Dim ws As New NotesUIWorkspace
Dim uidoc As NotesUiDocument
Dim nDevice As Long
Dim nListener As Long
Dim s As String
Dim handle As Long
Dim result As Long
Dim nCardID As Integer
Dim CardName As String
Dim Listener As String
Set uidoc = ws.CurrentDocument
CardName = uidoc.FieldGetText("SelectedCard")
If ( CardName = "") Then
Msgbox "Please select the GPIB Card!" ,16,"Error"
Exit Sub
End If
' QLIB supports up to 8 GPIB Controller
nDevice = Val(Right$(CardName, 1))
If (Instr(CardName, "PCIGPIB")) Then
nCardID = PCIGPIB
Elseif (Instr(CardName, "USBGPIB")) Then
nCardID = USBGPIB
Else
nCardID = GPIB
End If
' Retrieve Listener Address
Listener = uidoc.FieldGetText("Listener")
nListener = Val(Right$(Listener, 2))
' Retrieve Text to send to the GPIB Device
s = uidoc.FieldGetText("StringToSend")
handle = QAPIExtOpenCard(nCardID, nDevice)
If (handle <> 0) Then
result = QAPIExtWriteString(handle, nListener, s, Len(s), 0)
If (result) Then
' data send to gpib device
Else
' failure
Msgbox "Failure sending data!", 16, "Information"
End If
End If
End Sub
' ------------------------------------------------------------------
' PART 2: Reading a GPIB / IEEE-488 / HPIB Device from Lotus Notes
'
' Talker: A device capable of transmitting data over the interface
' when addressed to talk by the active controller. Examples of such
' devices are voltmeters, data-acquisition systems, or any other
' programmable instrument. There can be only one addressed talker on
' the GPIB Bus at one time.
' ------------------------------------------------------------------
'
' Select the talker address, which is set by a DIP-Switch on the
' back side of your instrument.
'
Sub ReadString()
Dim ws As New NotesUIWorkspace
Dim uidoc As NotesUiDocument
Dim nDevice As Long
Dim nListener As Long
Dim s As String
Dim handle As Long
Dim result As Long
Dim nCardID As Integer
Dim CardName As String
Dim Listener As String
Set uidoc = ws.CurrentDocument
CardName = uidoc.FieldGetText("SelectedCard")
If ( CardName = "") Then
Msgbox "Please select the GPIB Card!" ,16,"Error"
Exit Sub
End If
' QLIB supports up to 8 GPIB Controller
nDevice = Val(Right$(CardName, 1))
If (Instr(CardName, "PCIGPIB")) Then
nCardID = PCIGPIB
Elseif (Instr(CardName, "USBGPIB")) Then
nCardID = USBGPIB
Else
nCardID = GPIB
End If
' Retrieve Listener Address
Listener = uidoc.FieldGetText("Talker")
nListener = Val(Right$(Listener, 2))
' Create string buffer
s = Space$(256)
handle = QAPIExtOpenCard(nCardID, nDevice)
If (handle <> 0) Then
result = QAPIExtReadString(handle, nListener, s, Len(s), 0)
If (result) Then
' data successfully read from gpib device
Call uidoc.FieldSetText("String", s)
Else
' failure
Msgbox "Failure reading data!", vbInformation, "Information"
End If
End If
End Sub
' ------------------------------------------------------------------
' PART3: Checking whether a device has requested service ( SRQ
' Service Request)
'
' A device can interrupt the active controller by asserting the SRQ
' line. The SRQ is a single line, and if there are multiple devices
' on the GPIB Bus that have been configured to assert an SRQ, the
' active controller will have to "poll" the devices to figure out
' which one actually asserted the SRQ.More than one device could in
' principle assert an SRQ at the same time. The active controller
' can poll the devices in one of two ways: serial poll or parallel
' poll.
' ------------------------------------------------------------------
Sub ReadSRQ()
Dim ws As New NotesUIWorkspace
Dim uidoc As NotesUiDocument
Dim nDevice As Long
Dim nListener As Long
Dim s As String
Dim handle As Long
Dim result As Long
Dim nCmd As Long
Dim nCardID As Integer
Dim CardName As String
Dim Listener As String
Set uidoc = ws.CurrentDocument
CardName = uidoc.FieldGetText("SelectedCard")
If ( CardName = "") Then
Msgbox "Please select the GPIB Card!" ,16,"Error"
Exit Sub
End If
' QLIB supports up to 8 GPIB Controller
nDevice = Val(Right$(CardName, 1))
If (Instr(CardName, "PCIGPIB")) Then
nCardID = PCIGPIB
Elseif (Instr(CardName, "USBGPIB")) Then
nCardID = USBGPIB
Else
nCardID = GPIB
End If
handle = QAPIExtOpenCard(nCardID, nDevice)
If (handle <> 0) Then
result = QAPIExtSpecial(handle, JOB_READSRQ, 0, 0)
If (result = 0) Then
Msgbox "No service requested",16,"Info"
Else
Msgbox "Device has requested service ( SRQ )",16,"Info"
End If
End If
End Sub
' ------------------------------------------------------------------
' PART4: Reading Serial Poll Status from DMM
'
' In a serial poll, the active controller asks each device in turn
' to send back a status byte that indicates whether the device has
' asserted the SRQ. Bit 6 of this byte (where the bits are numbered
' 0 through 7) is set if the device is requesting service. The
' definition of the other bits is device dependent (under 488.1 at
' least; 488.2 provides a much more concise definition of the status
' byte).
'
' The program has to perform this same sequence with every device
' it needs to poll.
' ------------------------------------------------------------------
'
Sub SerialPoll()
Dim ws As New NotesUIWorkspace
Dim uidoc As NotesUiDocument
Dim nDevice As Long
Dim nListener As Long
Dim s As String
Dim handle As Long
Dim result As Long
Dim pollbyte As Long
Dim nCardID As Integer
Dim CardName As String
Dim Listener As String
Set uidoc = ws.CurrentDocument
CardName = uidoc.FieldGetText("SelectedCard")
If ( CardName = "") Then
Msgbox "Please select the GPIB Card!" ,16,"Error"
Exit Sub
End If
' QLIB supports up to 8 GPIB Controller
nDevice = Val(Right$(CardName, 1))
If (Instr(CardName, "PCIGPIB")) Then
nCardID = PCIGPIB
Elseif (Instr(CardName, "USBGPIB")) Then
nCardID = USBGPIB
Else
nCardID = GPIB
End If
' Retrieve Listener Address
Listener = uidoc.FieldGetText("Listener2")
nListener = Val(Right$(Listener, 2))
' Create string buffer
s = Space$(256)
handle = QAPIExtOpenCard(nCardID, nDevice)
If (handle <> 0) Then
result = QAPIExtSpecialSP(handle, JOB_SERIALPOLL, nListener, pollbyte)
If (result) Then
' data successfully read from gpib device
Call uidoc.FieldSetText("String2", "Hex: " & Hex(Val(pollbyte)) & " Dec: " & (Val(pollbyte)))
Else
' failure
Msgbox "Failure reading data!", vbInformation, "Information"
End If
End If
End Sub
' ------------------------------------------------------------------
' PART5: Send a command to DMM
'
' The following commands are accepted by all devices on the GPIB Bus
' simultaneously. The address part will be ignored.
'
' - JOB_DCL (Device Clear): The DCL command causes all devices to
' return to a device dependent initial state.
'
' - JOB_LLO (Local Lockout): The LLO command disables the return-to-
' local front panel key on the device. The user can no longer
' change the device settings from its front panel.
'
' The following commands need an address and are only accepted by
' addressed devices. Whether the devices are the listeners or the
' talkers depends on the command. The three commands are as follows:
'
' - JOB_GET (Group Execute Trigger): The GET command tells all the
' addressed listeners to perform some device-dependent function,
' like take a measurement.GET allows for synchronizing a
' measurement function between multiple devices.This is only used
' in specialized cases.
'
' - JOB_SDC (Selected Device Clear): The SDC command resets the
' addressed listeners to a device-dependent state. It performs the
' same function as DCL,but only resets the addressed listeners,
' not all the devices.
'
' - JOB_GTL (Go To Local): The GTL command sets the addressed
' listeners back to local mode.
' ------------------------------------------------------------------
Sub SendCommand()
Dim ws As New NotesUIWorkspace
Dim uidoc As NotesUiDocument
Dim nDevice As Long
Dim nListener As Long
Dim s As String
Dim handle As Long
Dim result As Long
Dim nCmd As Long
Dim nCardID As Integer
Dim CardName As String
Dim Listener As String
Dim CommandName As String
Set uidoc = ws.CurrentDocument
CardName = uidoc.FieldGetText("SelectedCard")
CommandName = uidoc.FieldGetText("CommandList")
If ( CardName = "") Then
Msgbox "Please select the GPIB Card!" ,16,"Error"
Exit Sub
End If
' QLIB supports up to 8 GPIB Controller
nDevice = Val(Right$(CardName, 1))
If (Instr(CardName, "PCIGPIB")) Then
nCardID = PCIGPIB
Elseif (Instr(CardName, "USBGPIB")) Then
nCardID = USBGPIB
Else
nCardID = GPIB
End If
' Retrieve Listener Address
Listener = uidoc.FieldGetText("Listener3")
nListener = Val(Right$(Listener, 2))
handle = QAPIExtOpenCard(nCardID, nDevice)
If (handle <> 0) Then
Select Case Left$( CommandName,3)
Case "GTL": nCmd = JOB_GTL
Case "SDC": nCmd = JOB_SDC
Case "GET": nCmd = JOB_GET
Case "LLO": nCmd = JOB_LLO
Case "DCL": nCmd = JOB_DCL
End Select
result = QAPIExtSpecial(handle, nCmd, nListener, 0)
If (result) Then
' cmd successfully send to gpib device
Else
' failure
Msgbox "Failure sending command!", vbInformation, "Information"
End If
End If
End Sub
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