User`s guide

Triggered To Workspace
5-460
5Triggered To Workspace
Purpose Write the input sample to the workspace when triggered.
Library DSP Sinks
Description The Triggered To Workspace block creates a matrix or array variable in the
workspace, where it stores the acquired inputs at the end of a simulation. An
existing variable with the same name is overwritten.
For an M-by-N frame-based input, the block creates an N-column workspace
matrix in which each group of M rows represents a single input frame from
each of N channels (the most recent frame occupying the last M rows). The
maximum size of this workspace variable is limited to P-by-N, where P is the
Maximum number of rows parameter. (If the simulation progresses long
enough for the block to acquire more than P samples, it stores only the most
recent P samples.) The
Decimation factor, D, allows you to store only every
Dth input frame.
For an M-by-N sample-based input, the block creates a three-dimensional
array in which each M-by-N page represents a single sample from each of M
∗N
channels (the most recent input matrix occupying the last page). The
maximum size of this variable is limited to M-by-N-by-P, where P is the
Maximum number of rows parameter. (If the simulation progresses long
enough for the block to acquire more than P inputs, it stores only the last P
inputs.) The
Decimation factor, D, allows you to store only every Dth input
matrix.
The block acquires and buffers a single frame from input 1 whenever it is
triggered by the control signal at input 2 ( ). At all other times, the block
ignores input 1. The triggering event at input 2 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.
To save a record of the sample time corresponding to each sample value, check
the
Time box in the Save to workspace parameters list of the Simulation