0x2027 Control input FIR filter

Boxcar FIR filter (uses rectangular gains); equivalent to a moving average filter.

Defines the interpolation window length in multiples of 250 us (e.g. 4 for a 1 ms window) in the `order` sub-object. 
Each 4 kHz cycle, the values in the buffer are summed up and divided by the buffer length to produce the output.
When the filter order is equal to the number of control cycles per target update period, the result is a linearly interpolated command.

Name	Index:Sub	Type	Bit Size	Options			Unit	Access	PDO Mapping
Enabled	0x2027:1	BOOL	1	Disabled 0 Enabled 1				readwrite
Set to 1 to enable the control input FIR filter.
Name	Index:Sub	Type	Bit Size	Min Data	Max Data	Default Data	Unit	Access	PDO Mapping
Order	0x2027:2	USINT	8	0	31	3		readwrite
The order or length of the FIR filter. Order of the filter means the maximum number of delay elements used in the filter circuit.