Pablo Trujillo
Published © CC BY-ND

Using MATLAB to Implement a Distortion Effect on Zynq

Project where we will develop an overdrive guitar effect with MATLAB and Zynq.

IntermediateFull instructions provided4 hours55
Using MATLAB to Implement a Distortion Effect on Zynq

Things used in this project

Hardware components

PicoZed
Avnet PicoZed
×1
PicoZed FMC Carrier Card V2
Avnet PicoZed FMC Carrier Card V2
×1
Pmod I2S
Digilent Pmod I2S
×1

Software apps and online services

MATLAB
MATLAB
Vivado Design Suite
Xilinx Vivado Design Suite

Story

Read more

Code

Code snippet #3

Plain text
close all
clear all
clc
 
%% Fir taps compute
 
taps = fir1(4,0.000001) 

%% AXI registers configuration
h = aximaster('Xilinx')
 
enable = 1;
 
% FIR configuration
b0 = taps(1);
b1 = taps(2);
b2 = taps(3);
b3 = taps(4);
b4 = taps(5);
 
% Convert to fixed point
b0_qq = floor(b0*2^22);
b1_qq = floor(b1*2^22);
b2_qq = floor(b2*2^22);
b3_qq = floor(b3*2^22);
b4_qq = floor(b4*2^22);
 
% write AXI registers
h.writememory('40010118',0)
 
h.writememory('40010104',b0_qq)
h.writememory('40010108',b1_qq)
h.writememory('4001011C',b2_qq)
h.writememory('4001010C',b3_qq)
h.writememory('40010110',b4_qq)
 
h.writememory('40010118',enable)
 
release(h);

Code snippet #4

Plain text
close all
clear all
clc
 
%% Fir taps compute
 
taps = fir1(4,0.000001) 

%% AXI registers configuration
h = aximaster('Xilinx')
 
enable = 1;
 
% FIR configuration
b0 = taps(1);
b1 = taps(2);
b2 = taps(3);
b3 = taps(4);
b4 = taps(5);
 
% Convert to fixed point
b0_qq = floor(b0*2^22);
b1_qq = floor(b1*2^22);
b2_qq = floor(b2*2^22);
b3_qq = floor(b3*2^22);
b4_qq = floor(b4*2^22);
 
% write AXI registers
h.writememory('40010118',0)
 
h.writememory('40010104',b0_qq)
h.writememory('40010108',b1_qq)
h.writememory('4001011C',b2_qq)
h.writememory('4001010C',b3_qq)
h.writememory('40010110',b4_qq)
 
h.writememory('40010118',enable)
 
release(h);

Github

https://github.com/Digilent/Pmod-I2S2

Overdrive effect Matlab

Simulink models used on this project.

Credits

Pablo Trujillo

Pablo Trujillo

10 projects • 37 followers
FPGA designer for power electronics equipment. DSP and Power Electronics Control design specialist.

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