Hi, I am trying to design the butterworth filter using CMSIS library in cortex-M4 processor.. i know how to do it in MATLAB(and even fdatool), but i don't know anything about CMSIS library.. i saw the arm_fir_filter example and i understood it.. but my requirement is IIR filter design.. i am not getting any example code or any links how can i design a Butterworth filter using CMSIS library..
I know we don't have Butterworth API in CMSIS-DSP, so which one i should use Biquad Cascade IIR Filters Using a Direct Form II Transposed Structure or Infinite Impulse Response (IIR) Lattice Filters
please can anyone help me out to solve this problem?
the corresponding documentations for IIR filters can be found here www.keil.com/.../group__group_filters.html
And the source codes of all filter functions are located in C:\Keil\ARM\PACK\ARM\CMSIS\4.5.0\CMSIS\DSP_Lib\Source\FilteringFunctions
Since CMSIS is an open source project, you might discuss and find some useful information directly on ARM github github.com/.../CMSIS_5 github.com/.../CMSIS
Ya, thank you.. Based on the documents available in the internet, i have done the coding. how can i verify that my code is correct or not?
How do you check if a lamp works? Isn't the traditional way to turn it on and see if it lights up, and stays lit at a constant - and reasonable - intensity?
The way to test a filter is obviously to send in a signal of varying frequency and check the response of the filter - if you get the correct response your program works. If you get a different filter response then it doesn't.