Vmetro VBAT-PB, Руководство пользователя

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4 Operation
Actions T h e sequencer is a state machine which can be in one of 16 possible states. In
each state, a number of actions can be defined to take place, like:
Sampling in STATE or TIMING mode,
Store only samples satisfying given event patterns,
Count occurrences of given event patterns,
Delay a certain time.
Transitions A c t i o n s may take place as a function of event pattern match and next state
number. (However, Sampling and Delay will only be a function of current state
number as a self-imposed restriction.)
In addition to actions, each state may lead to transitions, i.e.:
Goto another state in the sequencer,
Trigger the analyzer.
Halt the sampling and show the trace
Transitions may occur as a function of event pattern match (If-Elsif-Else tests),
counter carry, delay carry and next state number.
General structure of one state
The general structure and capabilities of one state in the Sequencer program is
as shown below.
(Bold text indicates operators, CAPs indicates parameters, bar "I" evt. in "1 r indicates
alternatives):
S a m p l i n g i n I S T A T E I T I M I N G I m o d e
S t o r e ( E V E N T EXPRESSION)
l I f I C o u n t N o c c u r r e n c e s o f i D e l a y T I M E t h e n i f l ( E V E N T
EXPRESSION) t h e m
T r i g g e r I G o t o N I H a l t *
E l s i f ( E V E N T EXPRESSION) t h e n
T r i g g e r I G o t o N H a l t *
E l s e
T r i g g e r I G o t o N H a l t *
• T h e colon ':' indicates that other states of the same construction can be
entered in this location.
• Multiple branch conditions are possible by combining an If, Count or Delay
statement followed by a number of Elsif; optionally ending with an Else.
Note that Count and Delay only may come as an alternative to the If, and
that it is still allowed to use Elsif and Else after Count and Delay.
• * ) Halt may only be used alone.
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