National Instruments GPIB-PC User Manual
Page 121
BASICA/QuickBASIC GPIB-PC Function Calls
Section Four A
GPIB-PC User Manual
4A-46
©National Instruments Corp.
Which PPE and PPD messages are sent and the meaning of a particular
parallel poll response are all system dependent protocol matters to be
determined by you.
On exit, all devices are unaddressed.
Board
IBPPC
Function:
When
BD%
specifies an interface board, the board itself is programmed
to respond to a parallel poll by setting its local poll enable (lpe)
message to the value of
V%
.
Refer also to
IBCMD
,
IBIST
, and Table 2.1 for additional information.
Device Examples:
1.
Configure the device
DVM%
to respond to a parallel poll by
sending data line DIO5 true (ist=0).
100 V% = &H64
110 CALL IBPPC (DVM%,V%)
2.
Configure the device
DVM%
to respond to a parallel poll by
sending data line DIO1 true (ist=1).
100 V% = &H68
110 CALL IBPPC (DVM%,V%)
3.
Cancel the parallel poll configuration of the device
DVM%
.
100 V% = &H70
110 CALL IBPPC (DVM%,V%)
Board Example:
1.
Configure the interface board
BRD0%
to respond to a parallel
poll by sending data line DIO5 true (ist=0).
100 V% = &H64
110 CALL IBPPC (BRD0%,V%)