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?
