DAPL Trigger Commands
DAPL includes over 100 built-in commands in the following categories. |
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The next three commands use DAPL regions. A region is specified as either the inside or the outside of a range of numbers.
LIMIT (s, r1, t, r2)- Asserts trigger t when a value from source s is in region r1. If the optional hysteresis region r2 is specified, no further triggers are asserted until the value in s is outside r2.
DLIMIT (s, r1, t, r2)- Asserts trigger t when the difference between successive values from source s is in region r1. If the optional hysteresis region r2 is specified, no further triggers are asserted until the difference is outside r2.
PEAK (s, select, t, r)- Reads from source s and asserts trigger t for each selected peak. The select parameter specifies whether the selected peaks are maxima, minima, or both. Region r is optional; if present, only peaks in r are selected.
LOGIC (s, parameters, t)- Reads from source s and asserts trigger t when a specified logical equation is true. This command normally processes binary data from the digital input port.
WAIT (s, t, n1, n2, d)- Waits for assertions of trigger t, then transfers blocks of data from source s to destination d. A block of data consists of n1 points before a trigger event and n2 points after the trigger event.
TSTAMP (t, d)- Reads from trigger t and places trigger assertion times in destination d.
FREQUENCY (t, n, d)- Finds the number of assertions of trigger t in each block of n samples; places counts in destination d.
MINTIME (t1, c, t2)- Reads triggers from source t1, transfers triggers to destination t2, subject to the restriction that triggers in t2 must be separated by at least c counts. Triggers not meeting this restriction are ignored.
PCASSERT (control, t)- Asserts a trigger based on an asynchronous input.
TAND (t1, t2, ..., tn, u)- Asserts trigger u when all n input triggers t1 through tn are asserted.
TOR (t1, t2, ..., tn, u)- Asserts trigger u when any of the n input triggers t1 through tn is asserted.
TRIGSCALE (t1, parameters, t2)- Alter event times to account for multiple data channels, decimation of a data stream, or time offsets between events and desired data.
TRIGARM (s, t)- Send a signal to trigger t through pipe s to enable or disable it.
TRIGSEND (t1, c)andTRIGRECV (c, t2)- Transfer software trigger events between multiple, slaved data acquisition processor boards through data channel c.