Measurement-computing Micro 488/EX rev.2.1 Uživatelský manuál stáhnout pdf (Strana 49)

Section 4 General Programming

4.7

4.4 MACRO Programming

The

MACRO

command allows the user to build a file of sequential Micro488/EX

commands and execute them with a single

DOMACRO

command. The Micro488/EX is

capable of storing up to 100 different

MACRO

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.

4.4.1 Creating a MACRO

The user defines a macro by the following command sequence:

MACRO 1

list of valid Micro488/EX commands

ENDM

Type the following on the PC's keyboard to create a simple macro…

MACRO 1

DAY

DATE

ENDM

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 217 218

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