Real time audio data plot from COM/serial port

10 次查看(过去 30 天)
need to know how i can plot audio data in real-time from serial port. am getting error using this code.
clear; clc;
%create a serial object
s= serialport("COM4", 115200);
%open serial port
fopen(s);
%plotting data
i= 1;
while(1)
data(i)= str2double(fscanf(s));
plot(data);
pause(0.01);
i= i+1;
end
%error i am getting is---
Error using fopen
First input must be a file name or a file identifier.
Error in pltsril (line 5)
fopen(s);

回答(1 个)

Cris LaPierre
Cris LaPierre 2023-4-7
fopen does not work with a serialport object. See the available methods here:
You likely want read.
  27 个评论
Walter Roberson
Walter Roberson 2023-4-13
Using readline(device) is not going to be useful for you. You need to find out what data format the device is sending, and you need to use read() of the device, probably using one of the commands I showed above.
What model of device are you reading from?

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