meas_freq :
A primitive for measuring the frequency of a trigger.
The meas_freq
primitive measures the frequency of a trigger input trig
, by measuring the time difference between its two consecutive events. The real-typed output out
indicates the frequency measured from the last two trigger events of the input. It initially takes an “NaN (not-a-number)” value until the first frequency measurement can be made.
Input/Output Terminals
Name | I/O | Type | Description |
out | output | real | value |
trig | input | xbit | trigger |