ECE 3551-Lab6

ECE 3551-Lab6 - ECE 3551 MICROCOMPUTER SYSTEMS 1 Lab...

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ECE 3551 MICROCOMPUTER SYSTEMS 1 Lab 6—Learn to process audio data OBJECTIVE: Learn how to process audio data in ADSP-BF533 EZ-Kit Lite. Learn how to implement digital filer in DSP. Learn how to control the audio input/output. Create the Project 1. Before power on the board , make sure that switch SW9 pin1,pin2, pin3, pin4, pin5 and pin6 are turned on., which means all pins in SW9 must be on. 2. Copy the project in Lab #5 to “u:\ece3551\labs\lab6” Modify the Project In this lab, you need to learn how to filter audio data and compare the original audio and the filtered audio. In this Lab exercise only input 1 and output 1 will be used. 1. Read the data from the input 1 and save it’s copy: one is the original data and another
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will be the filtered data. PF8 is used to control which data is sent to output 1: In the beginning, LED4 is off, and the original data is send to output1. So what is heard is the original audio. When PF8 is pressed: The LED4 should turn on, and The filtered data is send to output. What is heard, therefore is filtered audio. By pushing PF8 again, the LED4 should turn off, and the original data is send to output1; what is heard is the original audio again. 2. Designing Filters: Use MATLAB to design 2 types of filters: 1. Low-Pass FIR Filter with following properties: Response Type = Lowpass Design Method = FIR Window Filter Order (i.e., Number of Filter Coefficients) = 100 Sampling Frequencey Fs = 48000 Hz Cutoff Frequency Fc = 5000 Hz Window = Chebyshev Sidelobe atten. = 80 Export Filter coefficients: The MATLAB should generate the following Filter Coefficients:
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Low-Pass Filter /* * Filter Coefficients (C Source) generated by the Filter Design and Analysis Tool * * Generated by MATLAB(R) 6.5.1 and the Signal Processing Toolbox
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ECE 3551-Lab6 - ECE 3551 MICROCOMPUTER SYSTEMS 1 Lab...

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