How to calculate IIR using fixed-point number?

[mengxiao]

I use KL46 to do IIR filter for data collected by ADC, and IIR filter wants to use fixed point count, KL46 is a supported library?

The IIR type I use is "Direct From II 4Order"

[jingpan]

Hi Meng,

There is a CMSIS DSP library in the Kinetis SDK which you can download from https://mcuxpresso.nxp.com/en/builder. This is a optional component. You must select it before you download SDK. This library is provided by ARM. It is a suite of common signal processing functions for use on Cortex-M processor based devices. IIR is one of its function.

Regards,

Jing