matlab读取串口数据并显示曲线的实现示例

matlab程序读取单片机通过串口传来的IMU角度数据，并用曲线显示出来。

上传的值为float型，每个数据后有回车符。范围90~-90

主文件 serial_test2.m

％％
clc;

global t;
global x;
global m;
global ii;

t = [0];
m = [0];
ii = 0;
x = -100;
p = plot(t,m,'EraseMode','background','MarkerSize',5);
axis([x-200 x+200 -90 90]);
grid on;

％％

try
 s=serial('com4');
catch
 error('cant serial');
end
set(s,'BaudRate', 115200,'DataBits',8,'StopBits',1,'Parity','none','FlowControl','none');
s.BytesAvailableFcnMode = 'terminator';
s.BytesAvailableFcn = {@callback,p};

fopen(s);

pause;
fclose(s);
delete(s);
clear s
close all;
clear all;

回调函数 callback.m

％％
function callback(s, BytesAvailable,p)

global t;
 global x;
 global m;
 global ii;

out = fscanf(s);
 data = str2num(out)

t = [t ii];
 m = [m data];
 set(p, 'XData',t,'YData',m(1,:));

drawnow
 x = x + 1;
 axis([x-200 x+200 -90 90]);
 ii=ii+1;
end

来源：https://blog.csdn.net/qwertyuj/article/details/12108155