MATLAB动画显示串口数据【实例】（修正链接）

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</pre><br>
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)
http://v.youku.com/v_show/id_XNDk2OTA1OTQw.html
升级版（双数据接收，绘图）：http://v.youku.com/v_show/id_XNDk3NzM0NzE2.html

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“MATLAB串口操作官方教程.pdf” 和 "Matlab中使用Plot函数动态画图方法总结"，
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.
--------------------
#include"stdio.h"
#include"math.h"
#include"string.h"
#define pi 3.1415926
void delay(int a){
int i,j,delay;
for(i = 0 ;  i < 1000a; i++){
delay = 0;
for(j = 0; j < 1000a; 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 < 100N ; i++){
angle = angle + 3.6;
rad = angle/180pi;
x = cos(rad);
y = sin(rad);
printf("%f \n", x);
delay(dltime);
}
return 0;
}

--------------------------------------------
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 line
global i;
global t;
global x;
global m;
t = [0];                    % initialize
m = [0];                    % initialize
i = 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 obj
set(s,'BaudRate',115200,'DataBits',8,'StopBits',1,…
'Parity','none','FlowControl','none');  % set properties for serial
s.BytesAvailableFcnMode = 'terminator'; % byte number or terminator
s.BytesAvailableFcn = {@callback,p};   % {@mycallback,time}
fopen(s);
fprintf(s,'cd /home');
pause(1);           % pause function, 1s
fprintf(s,'./matlab-serial');
pause;           % pause function
fprintf(s,'1,1');
pause;      %right here is receiving the data and plot
fclose(s);
delete(s)
clear s
close all;
clear all;

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：
http://blog.csdn.net/sonictl/article/details/8495973

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