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Returns – Measurement Computing GPIB-488 User Manual

Page 26

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Chapter 3

GPIB 488.1 Library Reference

GPIB-488

3-13

Programming Reference Manual

Returns

ibsta

will contain a 16-bit status word as described in Appendix B,

IBSTA

.

iberr

will contain an error code, if an error occurred.

Usage Notes

None.

IbcTIMING

bd

Handshake Timing. If

value

is 1, normal timing (> 2

*sec.) is used. If

value

is 2, high-speed timing (> 500

nsec.) is used. If

value

is 3, very high-speed timing (>

350 nsec.) is used.

IbcDMA

bd

Enable/Disable DMA. If

value

is zero, DMA transfers

are disabled, otherwise

value

specifies the DMA

channel that the board uses.

IbcSendLLO

bd

Send Local Lockout. If

value

is 0, LLO command is

not sent when device is put online; non zero = LLO
command is sent

IbcSPollTime

bd or dev

Serial Poll Timeout.

value

ranges from 0 to 17 specify

timeouts of 10 msecs to 1000 secs. Refer to Table 3-6,

Timeout Codes

.

IbcEndBitIsNormal

bd or dev

If set, causes END status to be set on receipt of EOS.

IbcPPollTime

bd

Parallel Poll Timeout.

value

ranges from 0 to 17

specify timeouts of 10 msecs to 1000 secs. Refer to
Table 3-6,

Timeout Codes

.

IbcUnAddr

dev

If

value

is 0, the untalk and unlisten (UNT, UNL) are

not sent after each device level read/write; non zero =
the UNT, UNL commands are sent after each device
lever read/write

Table 3-3. ibconfig Options (Continued)

Option

Valid for

Description