Programmer Guide/SPU Reference/AVR

AVR - averaging

Usage:

AVR X TYP T RS

Inputs:

X

A number or vector.

TYP

A string or number selecting the averaging method.

T

A number used as parameter for some methods.

RS

Reset input (see the function description).

Outputs:

Y

The ("time") average of X (same type as X).

N

The number of average cycles since the last reset (number).

Function:

Compute an average of input X. The averaging is performed across a specified or infinite number of evaluation cycles. If input X is a vector, each element of the vector is "time"-averaged. In the table X(t)/Y(t) is used for the input/output number or one input/output vector element in the evaluation cycle t.

Table 5: Averaging and selection methods

value of TYP	averaging or selection method
0 or LINEAR	If T is greater than 0 it is used as number of average cycles: File:1205.pngOtherwise (T=0) an infinite average period is used:File:1206.png
1 or EXPONENTIAL	File:1207.pngwith: k = U1/2 and 0 < T < 1
2 or MINIMUM	File:1208.png
3 or MAXIMUM	File:1209.png

The input RS can be used to reset the averager when the SPU is restarted. If RS is set to 1 the averager is reinitialised and the cycle counter (t) is set to zero. Note: the RS input is checked only once when the SPU (containing the averager atom) receives the start-command.