Question

I am using Matlab to read data from a serial port coming through a microprocessor. The data is in hexadecimal format with each sample of 4 bytes(32 bits). When I read this data, I get some random sequence of numbers which don’t match the transmitted data. Below is my code

s = serial('COM16'); %assigns the object s to serial port

set(s, 'InputBufferSize', 128); %number of bytes in inout buffer
set(s, 'FlowControl', 'none');
set(s, 'BaudRate', 921600);
set(s, 'Parity', 'none');
set(s, 'DataBits', 8);
set(s, 'StopBit', 1);
set(s, 'Timeout',100);
%clc;

disp(get(s,'Name'));
prop(1)=(get(s,'BaudRate'));
prop(2)=(get(s,'DataBits'));
prop(3)=(get(s, 'StopBit'));
prop(4)=(get(s, 'InputBufferSize'));

disp([num2str(prop)]);

fopen(s);           %opens the serial port

data = fscanf(s);

fclose(s); %close the serial port

Please tell me what I am doing wrong do that I can get the correct heart sound.
thanks

Answer 1

You can lower the baudrate to something more standard, like 115200.

You can also try with a terminal program.