Low Pass Filter Implementation...

[pranavparalikar]

Posted on September 08, 2011 at 11:07

Hello,

I am using STM8S208MB MCU for my application and need to design a Low Pass Filter for 500 Hz on the Analog Inputs. Has anybody designed and implemented this kind of LPF using the MCU. I need the filter of first or second order. Is it possible to implement it in the MCU??

Are any documents available on ST site or Internet??

Awaiting for positive replies

Thanks & Regards,

Pranav

#low-pass-filter #fir #iir #lpf #filter. #low-pass-filter

[Andrew Neil]

Posted on September 08, 2011 at 13:26

Do you mean:

1. A digital filter - implemented in code inside the MCU, or
2. An analogue filter - implemented in hardware outside the MCU ?

In the 1st case, see any standard text on digital filtering and digital signal processing (DSP);

In the 2nd case, see any standard text on analogue filter design.

[rakesh2]

Posted on September 09, 2011 at 11:15

We know the fundamentals of digital filtering. We are looking for a code for STM8 which can be used immediately.

Best,

Rakesh

[Andrew Neil]

Posted on September 09, 2011 at 11:46

You asked if it was possible - you didn't say you wanted a ready-to-use solution.

Have you looked at the resources that ST provide?

Have you Googled?

[mighel84]

Posted on October 20, 2011 at 23:32

I think that you could see this:

http://www-users.cs.york.ac.uk/~fisher/mkfilter/