NAME

       ddt - Compute the derivative of the input function

SYNOPSIS

       loadrt ddt [count=N|names=name1[,name2...]]

DESCRIPTION

       For  every  function call from the real time thread, calculate the difference between the old and current
       input value divided by the timer elapsed since the last call.

FUNCTIONS

       ddt.N (requires a floating-point thread)

PINS

       ddt.N.in float in
       ddt.N.out float out

NOTES

       As this only work on two consecutive input values, it will only work  well  if  the  input  change  every
       function  call, and not work so well if the rate of change is very low and the input change do not happen
       every time the real time function is called.

AUTHOR

       Jeff Epler

LICENSE

       GPL

LinuxCNC Documentation                             2025-06-19                                             DDT(9)