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Section Four A BASICA/QuickBASIC GPIB-PC Function Calls
©National Instruments Corp. 4A-27 GPIB-PC User Manual
Methods B and C together determine when write operations
send the END message. If Method B alone is chosen, the
END message is sent automatically with the EOS byte
when the low 7 bits of that byte match the low 7 bits of the
EOS character. If Methods B and C are chosen, a full 8-bit
comparison is used.
Note that defining an EOS byte for a device or board does
not cause the handler to automatically send that byte when
performing IBWRTs. To send the EOS byte, your
application program must include it in the data string it
defines.
Device IBEOS Function:
When BD% specifies a device, the options coded in V% are used for all
device reads and writes in which that device is specified.
Board IBEOS Function:
When BD% specifies a board, the options coded in V% become
associated with all board reads and writes.
Refer also to IBEOT and Table 2.1.
Device Example:
1. Send END when the linefeed character is written to the device
DVM%.
10 EOSV% = &H0A ' EOS info for IBEOS.
:
:
100 V% = EOSV% + &H0800
110 CALL IBEOS (DVM%,V%)
120 WRT$ = "123" + CHR$(&H0A)
130 ' Data bytes to be
140 ' written. EOS
150 ' character is the
160 ' last byte.
170 CALL IBWRT (DVM%,WRT$)