User`s guide

Queue
5-354
the Queue block is reenabled; the Out port value is only reset to zero in this case
if
Clear output port on reset is selected.
When two or more of the control input ports are triggered at the same time
step, the operations are executed in the following order:
1 Clr
2 Push
3 Pop
The triggering event for the
Push, Pop, and Clr ports is specified by the Trigger
type
pop-up menu, and can be one of the following:
•
Rising edge triggers execution of the block when the trigger input rises from
a negative value to zero or a positive value, or from zero to a positive value.
•
Falling edge triggers execution of the block when the trigger input falls from
a positive value to zero or a negative value, or from zero to a negative value.
•
Either edge triggers execution of the block when either a rising or falling
edge (as described above) occurs.
The
Push onto full register parameter specifies the block’s behavior when a
trigger is received at the
Push port but the register is full. The Pop empty
register
parameter specifies the block’s behavior when a trigger is received at
the
Pop port but the register is empty. The following options are available for
both cases:
•
Ignore – Ignore the trigger event, and continue the simulation.
•
Warning – Ignore the trigger event, but display a warning message in the
MATLAB command window.
•
Error – Display an error dialog box and terminate the simulation.
The
Push onto full register parameter additionally offers the Dynamic
reallocation
option, which dynamically resizes the register to accept as many
additional inputs as memory permits. To find out how many elements are on
the queue at a given time, enable the
Num output port by selecting the Output
number of register entries
option.