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Chapter 6, IBASIC Controller
PROGram Subsystem
To download an IBASIC program, any currently resident IBASIC program must
first be deleted using the :DELete:ALL command. Attempting to download a new
IBASIC program while an IBASIC program is currently resident causes
IBASIC Error: -282 Illegal program name
NOTE:
It is possible for the PROGram Subsystem to think that there is an IBASIC program
resident in the Test Set when, in actuality, there is not. This situation would exist for
example, if an IBASIC program had been created and downloaded using the :DEFine
command and then deleted, from the front panel, using the SCRATCH ALL command
from the IBASIC Command line. Under this circumstance IBASIC Error -282 would be
generated when another attempt is made to download a program with the PROGram
Subsystem. It is recommended that the :DELete:ALL command always be sent
immediately before the :DEFine command.
The IBASIC program downloaded into the Test Set must be transferred as IEEE
488.2 Arbitrary Block Program Data. Refer to the IEEE Standard 488.2-1987 for
detailed information on this data type. Two syntax forms are provided with the
Arbitrary Block Program Data data type: one form if the length of the program is
known and another one if it is not.
Syntax (length of program not known)
PROGram[:SELected]:DEFine <#0><program><NL><END>
The following notation is used in the command description:
316
S:\agilent\e8285\USRGUIDE\BOOK\CHAPTERS\ibasic.fb
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<#0> = IEEE 488.2 Arbitrary Block Program Data header.
<program> = the IBASIC program sent as 8 bit data bytes.
<NL> = new line = ASCII line-feed character.
<END> = IEEE 488.1 END message. This terminates the block transfer and is only sent
once with the last byte of the indefinite block data.
.
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