DAPL Processing Commands
DAPL includes over 100 built-in commands in the following categories. |
|---|
DAPL processing commands are used to analyze data, detect important features, test for special conditions, or collect statistical information.
+ - * / & | ^ << >>- Calculate arithmetic and logical operations on data: addition, subtraction, multiplication, division, with logical and, logical or, xor, shift left, shift right. Coefficients can be pipes, constants or variables.
HIGH (s, n, d)- Reads blocks of n values from source s and places maximum values in destination d.
LOW (s, n, d)- Reads blocks of n values from source s and places minimum values in destination d.
ABS (s, d)- Reads data from source s, forms absolute values, and places results in destination d.
PULSECOUNT (s, n, c)- Reads data from source s, detects low-to-high transitions of bit n, and places transition counts in variable c.
DELTA (s, d)- Reads data from source s and places differences between current and
previous values in destination d.
DELTAapproximates differentiation of the source data. INTEGRATE (s, d)- Reads from source s, integrates by the trapezoidal method, and places results in destination d.
SQRT (s, d)- Reads from source s, calculates square roots, and places results in destination d.
RANDOM (n, d)- Fills destination d with random numbers generated with seed n.
POLAR (s, d)- Reads from source s, converts data from rectangular to polar coordinates, and places results in destination d.
AVERAGE (s, n, d)- Reads from source s and places block averages in destination d.
BAVERAGE (s, n1, n2, d)- Reads n2 blocks of n1 points from source s and places averages of
corresponding points in destination d. This command operates like the
AVERAGEcommand, simultaneously and independently averaging data on multiple data channels. VARIANCE (s, n, d)- Reads blocks of n values from source s, computes statistical variance of each block, and places results in destination d.
DECIBEL (s, ref, scale, d)- Reads data from source s, converts to decibel units, and places results in destination d.
RMS (s, n, d)- Reads data from source s and places RMS power in destination d.
COSINEWAVE (a, n, d)- Places cosine wave data in destination d. Maximum value of amplitude a is 32767. n is the number of samples per cycle. Amplitude or frequency, or both, may be modulated with optional parameters.
SAWTOOTH (a, n, d)- Places sawtooth wave data in destination d. Maximum value of amplitude a is 32767. n is the number of samples per cycle. Amplitude or frequency, or both, may be modulated with optional parameters.
SINEWAVE (a, n, d)- Places sine wave data in destination d. Maximum value of amplitude a is 32767. n is the number of samples per cycle. Amplitude or frequency, or both, may be modulated with optional parameters.
SQUAREWAVE (a, n, d)- Places square wave data in destination d. Maximum value of amplitude a is 32767. n is the number of samples per cycle. Amplitude or frequency, or both, may be modulated with optional parameters.
TRIANGLE (a, n, d)- Places triangle wave data in destination d. Maximum value of amplitude a is 32767. n is the number of samples per cycle. Amplitude or frequency, or both, may be modulated with optional parameters.
FINDMAX (s, n, r, d)- Reads blocks of n values from source s and places in destination d each maximum value within region r. An optional extra destination holds the index in n of each maximum value.
RANGE (s, r, d)- Transfers from source s to destination d those values that fall in region r.
EXTRACT (s, b, d)- Reads bit b from each value in source and writes 0 or 1 as a value to destination d. Bit b is 0 for the least significant bit through 15 for the most significant.
PCOUNT (s, v)- Increments a count in variable v for each value in source s.
PVALUE (s, v)- Updates variable v with each value in source s.
PULSECOUNT (s, b, v)- Counts in variable v each low-to-high transition of bit b in successive values from source s.
CTCOUNT (s, d)v- Implements a 32-bit counter with 16-bit counter/timer hardware. Asssumes fewer than 65,535 pulses between successive acquisitions from a Counter Timer Board as source s. Destination d is a 32-bit pipe.
CTRATE (s, d)- Takes differences between successive acquisitions from a Counter Timer Board as source s to provide a frequency or rate to destination d.