matlab读取串口数据并显示曲线

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