lpcware

DSP library from NXP, how does the PID work?

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by riktw on Sat May 26 10:40:07 MST 2012
Hello

I am playing with the DSP library from NXP a bit.
You can find the DSP appnote from NXP here: http://www.nxp.com/documents/application_note/AN10913.pdf
I got most functions figured out, only the PID function confuses me a bit.
It required the well known variables, Kp, Ki and Kd but then we got integrated error, last error and si_error.
The information is a bit limited on what is what.

Last error is one I know, it's the feedback for the PID system, output - setpoint.
But si_error and integrated error are the ones I can't place.
And where can I enter my setpoint?

Anyone ever worked with this PID library?

Rik

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