Chapter 6 RAPID!
Commands
WCDMA Options Version 6.20
171
Control commands Control commands organize the process of a program. They e.g. allow to run a
specific part of a program several times or to select between different sets of
commands, depending on a condition.
In RAPID!, the following control commands have been implemented:
DO ... LOOP, WHILE, UNTIL
Command Short description
DO ...
LOOP
Loop with condition.
FOR ...
NEXT
Loop with a specified number of cycles.
IF ...
THEN
Checks a condition.
SELECT
CASE
Selects one of several cases.
Syntax
Syntax 1
DO [ {WHILE | UNTIL} boolExp ]
[ instructions ]
[ EXIT DO ]
[ instructions ]
LOOP
Syntax 2
DO
[ instructions ]
[ EXIT DO ]
[ instructions ]
LOOP [ {WHILE | UNTIL} boolExp ]
Parameters
boolExp is a boolean expression,
instructions are an (optional) number of program
lines.
Description
Dependent on a condition (
boolExp), this command
structure repeatedly runs a program segment.
Syntax 1 checks the condition before the loop is run. If
the condition is true in the moment the program arrives
at the loop, it will not be run at all.
Syntax 2 checks the condition after the loop has been
run.
WHILE means that the loop will be run as long as bool-
Exp
is true.
UNTIL will run the loop until boolExp becomes true.
EXIT DO causes the loop to be left instantly.
If the optional part with the condition is left out, the
loop will be run endlessly. In this case, the only way out
is an
EXIT DO command somewhere within the loop to
prevent the program from being trapped.
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