ECE 3551 Microcomputer Systems 1

Preformed By: James Morton Sunita Ramnarinesingh Arthur Lyssenko

 Our goal was to create a Graphic Equalizer using the Blackfin BF533  Our project program controlled audio output to 4 speakers using 4 filters and volume control with LED lighting.

We used the IIR filters similar to those used in Lab 4 to create :  Lowpass  Low-midpass  Mid-highpass  Highpass Equation used:

We had to create our IIR filter coefficients for our equalizer using MATLAB fdatool. In MATLAB fdatool we created the filters using IIR Chebyshev type 2 filters.

We first had some trouble getting the correct coefficients in Matlab but we were eventually able to figure it out. At first we could only get distorted sound from one filter. We tested each filter separately to make sure they were functioning. We added the output of each of the filters together first and then sent that total to output. output = (lowOut*((low)/2)) + (lowmidOut*((lomi)/8)) + (midhighOut*((mihi)/8)) + (highOut*((high)/2)); //filter outputs