function callback(s,BytesAvailable,p)    global i;    global t;    global x;    global m;    %     p = plot(t,m,...%              'EraseMode','background','MarkerSize',5);    out = fscanf(s) %read data from s    data = str2num(out);    if data>-2 & data < 2 %detect if data is legal    %    disp('*******data comes! \n');    t=[t 0.01*2*pi*i];   %0 0.1 0.2 0.3.. %Matrix 1*(i+1), column is increasing    m=[m data]; %Matrix 2*(i+1), 2row, i+1 column.    %http://blog.csdn.net/sonictl    %set(p(1),'XData',t,'YData',m(1,:))    %set(p(2),'XData',t,'YData',m(2,:))    set(p,'XData',t,'YData',m(1,:))    %http://blog.csdn.net/sonictl    drawnow    x = x + 3.6/360*2*pi;   % x = x+0.1    axis([x x+2*pi -1.5 1.5]);    pause(0.1);    i = i+1;    end    %http://blog.csdn.net/sonictl end

MATLAB动画显示串口数据【实例】

经过几天的学习，现在能实现串口数据的实时plot并记录在MATLAB变量中。

After a few days' learning, we can implement thatreal-time plot the data from serial port.

先看一下演示的视频吧：(see demo video)

升级版（双数据接收，绘图）：

The outline of the video:

演示视频大纲：

  1.介绍系统构成

  2.介绍板载C语言程序

  3.用Linux界面演示由MATLAB发送给目标板的命令，及理论返回值。

  4.介绍MATLAB本实例的m文件的主要功能，发送的命令，判断，画图

  5.演示整个MATLAB程序的实现效果

完成这个实例需要学习“” 和 ""， 请点击。

To finish this subject, we need firstly learn"Official tutorial for MATLAB serial port operation "

板卡产生数据源程序（C语言）： The source code for generating original data on the TLL main board.

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#include"stdio.h"#include"math.h"#include"string.h"#define pi 3.1415926void delay(int a){	int i,j,delay;	for(i = 0 ;  i < 1000*a; i++){		delay = 0;		for(j = 0; j < 1000*a; j++){			delay = delay+1;		}	}}int main(){	float angle, x, y,rad;	int i,N,dltime;	angle = 0;	//getchar();	printf("input the num of circles, delay time: ");	scanf("%d,%d", &N, &dltime);	for (i = 0; i < 100*N ; i++){		angle = angle + 3.6;		rad = angle/180*pi;		x = cos(rad);		y = sin(rad);		printf("%f \n", x);		delay(dltime);	}	return 0;}

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MATLAB 接收数据主程序serial-test.m：

The main program for receiving data in MATLAB:

clc;%%% Use EraseMode,draw dynamically. Change axis dynamically.% Multi-Line drawing lineglobal i;global t;global x;global m;t = [0];                    % initializem = [0];                    % initializei = 0;x = -pi ;p = plot(t,m,...   'EraseMode','background','MarkerSize',5);axis([x x+2*pi -1.5 1.5]);   % x = [-1.5 pi, 0.5 pi]grid on;%%s = serial('COM3');     % creat serial port objset(s,'BaudRate',115200,'DataBits',8,'StopBits',1,...    'Parity','none','FlowControl','none');  % set properties for serials.BytesAvailableFcnMode = 'terminator'; % byte number or terminators.BytesAvailableFcn = {@callback,p};   % {@mycallback,time}fopen(s);fprintf(s,'cd /home');pause(1);           % pause function, 1sfprintf(s,'./matlab-serial');pause;           % pause functionfprintf(s,'1,1');pause;      %right here is receiving the data and plotfclose(s);delete(s)clear sclose all;clear all;

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MATLAB 接收数据，判断，动态绘图，回调函数 callback.m:

The Callback function for receiving, judge, plotting in MATLAB.

Explore more:  Real-time plotting in MATLAB for the Three axis accelerometer data 

三轴力传感器数据在MATLAB中实时绘图显示：

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