Measurement-computing Micro 488/EX rev.2.1 Instrukcja Użytkownika Pobierz pdf (Strona 113)

Section 5 Command Descriptions

5.43

MACRO…ENDM

The

MACRO

command allows the user to build a file of sequential commands and

execute them with a single

DOMACRO

command. The Micro488/EX is capable of

storing up to 100 different Macros which are maintained even when the power to the

interface is off.

Defining a Macro is initiated by issuing the

MACRO

command. Each subsequent

character following this command, including terminators and intervening spaces, is

saved in a buffer up to, and including, the

ENDM

. After the

ENDM

, the Micro488/EX

appends the macro number to the Macro buffer as a two digit decimal number. The

macro can then be executed by issuing a

DOMACRO

command. Any syntax errors that

are included within the Macro are not checked until the Macro is executed.

If a Macro has not been defined, it does not consume any memory from the USER

heap. If a Macro has been defined, any Macro buffer previously allocated is returned to

the USER heap prior to requesting memory to re-define the Macro. The initial size of

an allocated Macro buffer is 127 character locations (bytes). If more than 127 bytes are

required to store the Macro, additional memory is allocated in 127 byte increments. If

there is no available memory in the USER heap, an '

OUT

MEMORY

' error occurs and

any memory allocated to that Macro is returned to the heap.

Other useful commands with Macros follow. You should refer to the command

description for complete information.

COMMENT

The

COMMENT

command allows the user to send a pre-defined

ASCII string to the serial host when the Macro executes.

COUNT

The

COUNT

command returns the decrementing Macro loop

count of the last executed macro. This command is only valid

during macro execution.

DOMACRO

The

DOMACRO

command executes a Macro. An optionally

specified loop

count

and

interval

can be included with

this command to execute the Macro multiple times at regular

intervals. This loop

count

is the value returned with the

COUNT

command.

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 217 218

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