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KPCI-488LPA-900-01 Rev. A / December 2008

Return to 

Section Topics

2-33

Model KPCI-488LPA GPIB Controller Interface Card User’s Manual

Section 2: NI Command Compatible Functions

Syntax

Visual Basic

ibwait (ByVal ud As Integer, ByVal mask As Integer)

 

  As Integer

- or -

call ibwait (ByVal ud As Integer, ByVal mask As 

 

  Integer)

Parameters

ud

: board or device descriptor

mask

: GPIB events that can be monitored. The valid code values are shown in  

Table 

2-14

:

Table 2-14 

ibwait valid mask codes

Mask

Bit Position Hex Value Description

ERR

15

8000

GPIB error

TIMO

14

4000

Mask timeout

END

13

2000

END

 or 

EOS

 is detected by GPIB board

SRQI

12

1000

Send SRQ signal (only board)

RQS (only device 
level)

11

800

Device requesting service

SPOLL

10

400

Controller sequentially polls the board

EVENT

9

200

A 

DTAS

, 

DCAS

, or 

IFC

 event occur

CMPL

8

100

I/O completed

LOC

7

80

GPIB board is in Lockout Status

REM

6

40

GPIB board is in Remote Status

CIC

5

20

GPIB board is in CIC status

ATN

4

10

Send Attention signal

TACS

3

8

GPIB board as a talker

LACS

2

4

GPIB board as a listener

DTAS

1

2

GPIB board is in Device Trigger Status

DCAS

0

1

GPIB board is in Device Clear Status

Return Value

The value of the 

ibsta

Error Codes

EARG, EBUS, ECIC, EDVR, ENEB, ESRQ 

ibwrt

Description

This command writes data from a buffer to a device.

When 

ud

 is a device descriptor, 

ibwrt

 addresses the GPIB and writes count data 

bytes (

cnt

 is the tallying value in the counter) from the board’s memory to the GPIB 

device. The operation normally ends when 

cnt

 number of data bytes have been 

written; if 

cnt

 number of bytes are not written completely during the timeout period, the 

operation stops with an error. The number of bytes actually transferred is returned in 
the global variable, 

ibcntl

.

When 

ud

 is a board descriptor, the board-level 

ibwrt

 automatically writes 

cnt

 data 

bytes from the buffer to the GPIB device. Normally, this operation ends when the 

cnt

 

number of data bytes are completely written; if 

cnt

 number of bytes are not completely

 

written during the timeout period (or, if the board is not CIC and CIC sends the 

Device 

Clear

 message on the GPIB bus), the operation stops with an error. The number of 

bytes actually transferred is returned in the global variable 

ibcntl

.

Содержание KPCI-488 LPA

Страница 1: ...o c y e l h t i e k w w w E C N E D I F N O C F O E R U S A E M R E T A E R G A KPCI 488LPA GPIB Controller Interface Card User s Manual KPCI 488LPA 900 01 Rev A December 2008 KPCI 488LPA GPIB Contro...

Страница 2: ......

Страница 3: ...duct returned transportation prepaid Repaired or replaced products are warranted for the balance of the original warranty period or at least 90 days LIMITATION OF WARRANTY This warranty does not apply...

Страница 4: ......

Страница 5: ...e with electrical signals that are rated Measurement Category I and Measurement Category II as described in the International Electrotechnical Commission IEC Standard IEC 60664 Most measurement contro...

Страница 6: ...d common mode voltages Use standard safety precautions to avoid personal contact with these voltages The symbol on an instrument shows that the surface may be hot Avoid personal contact to prevent bur...

Страница 7: ...Model KPCI 488LPA GPIB Controller Interface Card User s Manual 2008 Keithley Instruments Inc All rights reserved Cleveland Ohio U S A Document Number KPCI 488LPA 900 01 Rev A December 2008...

Страница 8: ......

Страница 9: ...9 SETPORT 1 9 SETTIMEOUT 1 9 SPOLL 1 9 SRQ 1 10 TARRAY 1 10 TRANSMIT 1 10 WAITSRQDEVICE 1 12 2 NI Command Compatible Functions 2 1 Introduction 2 3 Using NI Command Compatible functions 2 3 Microsoft...

Страница 10: ...wrta 2 34 ibwrtf 2 35 Multi device functions 2 36 AllSpoll 2 36 DevClear 2 36 DevClearList 2 37 EnableLocal 2 37 EnableRemote 2 37 FindLstn 2 38 FindRQS 2 38 PassControl 2 39 PPoll 2 39 PPollConfig 2...

Страница 11: ...Section Figure Title Page 1 Figure 1 1 Open Project dialog box 1 2 2 Figure 2 1 Open Project dialog box 2 3 List of Figures...

Страница 12: ...This page left blank intentionally List of Figures Model KPCI 488LPA GPIB Controller Interface Card User s Manual iv KPCI 488LPA 900 01 Rev A December 2008...

Страница 13: ...9 2 Table 2 6 ibask device configuration parameter options 2 10 2 Table 2 7 Board configuration parameter options 2 14 2 Table 2 8 Device configuration parameter options 2 15 2 Table 2 9 EOS mode V va...

Страница 14: ...This page left blank intentionally List of Tables Model KPCI 488LPA GPIB Controller Interface Card User s Manual vi KPCI 488LPA 900 01 Rev A December 2008...

Страница 15: ...rsion 6 0 1 2 Microsoft Visual C C 1 4 Keithley Command Compatible function reference 1 5 GPIBBOARDPRESENT 1 5 BOARDSELECT 1 5 DMACHANNEL 1 5 ENTER 1 5 FEATURE 1 6 INITIALIZE 1 6 LISTENERPRESENT 1 7 P...

Страница 16: ...Command Compatible application using the API and Microsoft Visual Basic follow these steps Step 1 Enter Visual Basic and open or create a project to use the Keithley Command Compatible functions To cr...

Страница 17: ...tool to reposition or resize controls Step 4 Set control properties Set control properties from the properties list To view the properties list select the desired control and do one of the following P...

Страница 18: ...Keithley Command Compatible functions NOTE The project can be a new or existing one Step 2 Include function declarations and constants file IEEE C H Include IEEE C H in the C C source files that call...

Страница 19: ...Basic GpibBoardPresent As Long Return Value 0 if no GPIB is installed 1 if a GPIB board is installed BOARDSELECT Description This function selects a board to be the active board Syntax Microsoft C C a...

Страница 20: ...Valid FEATURE values are contained in Table 1 1 Table 1 1 FEATURE parameters Feature Constants Features Values Returned Information IEEEListener 0 Checking if ListenerPresent function is supported by...

Страница 21: ...the status of devices Syntax Microsoft C C and Borland C int ppoll char poll Visual Basic call ppoll poll As Integer Parameters poll returned parallel polling status RARRAY Description This function...

Страница 22: ...ta to receive len returns the actual number of received data bytes Return Value 0 read data successfully 8 timeout error SEND Description This function sends commands to a specified GPIB device Syntax...

Страница 23: ...void setport long int bd unsigned io Visual Basic call setport ByVal bd As Long ByVal io As Long Parameters bd the board number io the I O base address set to the device SETTIMEOUT Description This fu...

Страница 24: ...s Long ByVal eoi As Integer status As Integer Parameters buf the buffer storing the data to send count the maximum number of data bytes to be transmitted eoi enable or disable EOI mode of the device 0...

Страница 25: ...the talker MTA MLA My Listen Address Assigns the active GPIB board as the listener MLA DATA Starts the data part Before the DATA command the GPIB board has to be set as the talker Strings are enclose...

Страница 26: ...face Card User s Manual WAITSRQDEVICE Description This function waits until a device is requesting service or a timeout error occurs Syntax Microsoft C C and Borland C long int waitSRQDevice long int...

Страница 27: ...functions 2 5 IEEE 488 board level functions 2 6 IEEE 488 2 functions 2 7 Data Types 2 8 NI command compatible function reference 2 9 ibask 2 9 ibbna 2 11 ibcac 2 11 ibclr 2 12 ibcmd 2 12 ibcmda 2 13...

Страница 28: ...2 33 ibwrta 2 34 ibwrtf 2 35 Multi device functions 2 36 AllSpoll 2 36 DevClear 2 36 DevClearList 2 36 EnableLocal 2 37 EnableRemote 2 37 FindLstn 2 38 FindRQS 2 38 PassControl 2 38 PPoll 2 39 PPollCo...

Страница 29: ...ineers at 1 800 KEITHLEY US only or visit our website at www keithley com Using NI Command Compatible functions This section provides the fundamentals of building Windows XP 2000 Vista applications us...

Страница 30: ...e needed control from the Toolbox 2 Draw the control on the form Alternatively to place the default sized control on the form click the form Use the Select Objects tool to reposition or resize control...

Страница 31: ...2 Select Build from the Build menu Visual C C 4 0 and higher 3 Remember to link the NI command compatible import library GPIB 32 lib Overview of NI command compatible functions The NI command compatib...

Страница 32: ...device Table 2 2 IEEE 488 board level functions Function Description ibask Returns the current value of the selected configuration item ibcac Sets the assigned GPIB board to be the active controller b...

Страница 33: ...DevClear Sends the Selected Device Clear SDC GPIB message to clear the selected device DevClearList Clears multiple devices EnableLocal Sends Go To Local GTL GPIB message to multiple devices to allow...

Страница 34: ...2 ssize_t 32 bit signed integer 2147483648 2147483647 Long Long Cardinal U32 size_t 32 bit unsigned integer 0 4294967295 Unsigned long Not supported Placed by I32 Single F32 32 bit single precision fl...

Страница 35: ...fer to valid options as shown in Table 2 5 and Table 2 6 value the current value of the selected configuration item returned Return Value The value of the ibsta Error Codes EARG ECAP EDVR Table 2 5 ib...

Страница 36: ...ansfer ibaSpollBit 0x0016 0 Disable the SPOLL bit of the ibsta 1 Enable the SPOLL bit of the ibsta ibaSendLLO 0x0017 0 The GPIB LLO command is not sent while the device is connected by ibfind or ibdev...

Страница 37: ...vel writing or reading ibaEOSrd 0x000C 0 Ignore the EOS character during reading 1 The reading is stopped while the EOS character is read ibaEOSwrt 0x000D 0 The EOI line is not set to enable when the...

Страница 38: ...reating the ATN signal without considering any current data transfer for asynchronous control Support Level Board level Syntax Microsoft C C and Borland C int ibcac int ud int synchronous Visual Basic...

Страница 39: ...ronously Command words are used to configure the GPIB status and control GPIB devices ibwrt is used to send the device self control command To return the number of transferred command bytes in the glo...

Страница 40: ...int value Syntax Visual Basic idconfig ByVal ud As Integer ByVal opt As Integer ByVal v As Integer As Integer or call ibconfig ByVal ud As Integer ByVal opt As Integer ByVal v As Integer Parameters ud...

Страница 41: ...pairs of bytes during reading Default 0 ibcWriteAdjust 0x0014 0 No byte swapping 1 Swap pairs of bytes during writing Default 0 ibcSpollBit 0x0016 0 Disable the SPOLL bit of the ibsta 1 Enable the SP...

Страница 42: ...imeout value eot enable or disable the device EOI mode eos configure the device EOS character and device EOS modes ibcREADDR 0x0006 0 Unnecessary addressing is not operated during device level writing...

Страница 43: ...rd descriptor dma enable or disable DMA mode Return Value The value of the ibsta Error Codes EARG ECAP EDVR ENEB EOIP ibeot Description This command enables or disables the action that is setting GPIB...

Страница 44: ...tions and the corresponding values of v Configure bit A and bit C to determine how to terminate the I O reading If bit A is set and bit C is clear the I O reading is terminated when a byte that matche...

Страница 45: ...oft C C and Borland C int ibfind const char boardname Visual Basic ibfind ByVal boardname As String As Integer or call ibfind ByVal boardname As String ud As Integer Parameters boardname board name fo...

Страница 46: ...has the capability to automatically detect the status of each GPIB control line The upper byte bits 8 to 15 shows the status of the GPIB control line A description of each byte is listed in Table 2 1...

Страница 47: ...vice if ud is a device descriptor If a listener is detected a non zero value is returned in the found_listener pad device primary address addressing value between 0 and 30 sad the device secondary add...

Страница 48: ...led use ibdev or ibfind to access the board or device Support Level Board device level Syntax Microsoft C C and Borland C int ibonl int ud int onl Visual Basic ibonl ByVal ud As Integer ByVal onl As I...

Страница 49: ...nts specified by mask are monitored by ibnotify while one or more of the events appears the callback function is called For board level ibnotify call all mask bits are valid except for ERR and RQS For...

Страница 50: ...ion This command sets or disables a board or device secondary GPIB address Support Level Board device level Syntax Microsoft C C and Borland C int ibsad int ud int v Visual Basic ibsad ByVal ud As Int...

Страница 51: ...lel Poll Disable PPD message Valid parallel poll messages are 96 to 126 hex 60 to hex 7E or zero corresponding to sent PPD If ud is a board descriptor ibppc uses the parallel poll configuration value...

Страница 52: ...s Integer buf As String ByVal cnt As Long As Integer or call ibrd ByVal ud As Integer buf As String Parameters ud device descriptor buf the buffer that stores the data that is read from the GPIB cnt t...

Страница 53: ...As String ByVal cnt As Long As Integer or call ibrda ByVal ud As Integer buf As String Parameters ud device descriptor buf the buffer that stores the data that is read from the GPIB cnt the number of...

Страница 54: ...ion This command performs parallel polling Support Level Board device level Syntax Microsoft C C and Borland C int ibrpp int ud char ppr Visual Basic ibrpp ByVal ud As Integer ppr As Integer As Intege...

Страница 55: ...e response is set If automatic sequential polling is enabled the device has already been polled and the previous status byte value is returned by ibrsp Support Level Device level Syntax Microsoft C C...

Страница 56: ...or call ibsic ByVal ud As Integer Parameters ud device descriptor Return Value The value of the ibsta Error Codes EARG EDVR ENEB EOIP ESAC ibsre Description This command sets or clears the Remote Enab...

Страница 57: ...tion This command sets the board or device timeout period The timeout period is the maximum continuous time allowed for synchronous I O operation ibrd and ibwrt for example or the maximum waiting time...

Страница 58: ...more events described by mask including TIMO to occur If TIMO in the wait mask is set ibwait returns when the timeout period has expired even if no other GPIB events occur Setting TIMO to zero returns...

Страница 59: ...alker LACS 2 4 GPIB board as a listener DTAS 1 2 GPIB board is in Device Trigger Status DCAS 0 1 GPIB board is in Device Clear Status Return Value The value of the ibsta Error Codes EARG EBUS ECIC EDV...

Страница 60: ...l When ud is a board descriptor the board level ibwrt automatically writes cnt data bytes from the buffer to the GPIB device Normally this operation ends when the count data bytes are completely writt...

Страница 61: ...a bytes have been written if all the bytes are not written during the timeout period the operation stops with an error The number of bytes actually transferred is returned in the global variable ibcnt...

Страница 62: ...yVal board_desc As Integer addressList As Integer resultList As Integer Parameters board_desc board ID addressList the list of the device addresses ended by NOADDR resultList the list of sequential po...

Страница 63: ...ssage to multiple devices This sets multiple devices in local mode allowing local operation If only the constant in addrlist is NOADDR the Remote Enable REN GPIB line is set to disable Syntax Microsof...

Страница 64: ...indLstn ByVal ud As Integer padList As Integer resultList As Integer ByVal maxNumResults As Integer Parameters board_desc board ID padList the list of the GPIB primary addresses ended by NOADDR result...

Страница 65: ...oller can simultaneously obtain one bit status messages relayed from up to eight devices when parallel polling is performed Syntax Microsoft C C and Borland C void PPoll int board_desc short result Vi...

Страница 66: ...Integer addressList As Integer Parameters board_desc board ID addressList the list of the device addresses ended by NOADDR Error Codes EAGR EBUS ECIC EDVR EOIP ENEB RcvRespMsg Description This command...

Страница 67: ...addressing to a talker setting the interface to a receiver reading count data bytes from the device and storing these data bytes into the buffer The operation is normally stopped when the count data...

Страница 68: ...s three steps First reset the GPIB by controlling the Remote Enable REN line and then controlling the Interface Clear IFC line Second send the Universal Device Clear DCL GPIB message to clear all devi...

Страница 69: ...mand bytes in the global variable ibcntl Syntax Microsoft C C and Borland C void SendCmds int board_desc const void cmdbuf long count Visual Basic call SendCmds ByVal ud As Integer ByVal cmdbuf As Str...

Страница 70: ...interface to talk and then transfers the data from the buffer to the devices If eotmode is DABend the EOI line is set to enable while the final byte is sent If eotmode is NULLend the EOI line is set...

Страница 71: ...messages SendLLO is reserved for use in uncommon local remote situations Under typical situations SetRWLS is used to place a device in remote with lockout Syntax Microsoft C C and Borland C void Send...

Страница 72: ...ero value Otherwise the result contains a zero value TestSRQ is used to get the current status of GPIB SRQ line WaitSRQ is used to wait until the device controls the GPIB SRQ line Syntax Microsoft C C...

Страница 73: ...e GET messages are sent to the devices that are currently listen active on the GPIB bus Syntax Microsoft C C and Borland C void Trigger int board_desc Addr4882_t address Visual Basic call Trigger ByVa...

Страница 74: ...returns the result contains a non zero value if the SRQ line in controlled Otherwise the result contains a zero value Get the current status of the GPIB SRQ line by using TestSRQ Use WaitSRQ to wait...

Страница 75: ...Appendix A Status Error Codes In this section Topic Page NI command compatible status codes A 2 NI command compatible function error codes A 3...

Страница 76: ...means the condition did not occur Table A 1 NI command compatible status codes Mnemonic Position Hex Type Description ERR 15 8000 device board GPIB error TIMO 14 4000 device board Timeout END 13 2000...

Страница 77: ...Table A 2 NI command compatible function error codes Error Mnemonic iberr Value Meaning Description EDVR 0 OS error ECIC 1 Function requests GPIB board as CIC ENOL 2 No listen device on the GPIB bus E...

Страница 78: ...This page left blank intentionally A 4 KPCI 488LPA 900 01 Rev A December 2008 Appendix A Status Error Codes Model KPCI 488LPA GPIB Controller Interface Card User s Manual...

Страница 79: ...Unstable Will not read applied input Overload Calibration only Certificate of calibration required Data required attach any additional sheets as necessary Show a block diagram of your measurement sys...

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Страница 82: ...of Keithley Instruments Inc All other trademarks and trade names are the property of their respective companies A G R E A T E R M E A S U R E O F C O N F I D E N C E Keithley Instruments Inc Corporate...

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