通过Matlab进行虚拟Com-Port通信 [英] Virtual Com-Port communication through Matlab
问题描述
多次使用matlab连接Com-port时(5之4)，出现错误
While connecting my Com-port using matlab, many a times(4 out of 5) I get an error
??? Error using ==> serial.fopen at 72
Port: COM21 is not available. Available ports: COM3,
COM10, COM17, COM18.
??? Error using ==> serial.fopen at 72
Port: COM21 is not available. Available ports: COM3,
COM10, COM17, COM18.
但是，有时它会连接并按预期响应. 谁能告诉我这是什么问题?
However , sometimes it gets connected and responds as expected. Can anyone tell me whats the problem with this?
顺便说一下，我正在使用此代码段通过USB将我的微控制器连接到PC
By the way , I am using this snippet to connect my microcontroller to PC through USB
s = serial('COM21'); // code to initialize the req COM i.e. COM21 for me
fopen(s);
推荐答案
我之前遇到过这个问题.事实证明，如以下线程所示，MATLAB不能很好地处理即插即用:
I ran into this issue before. It turns out MATLAB doesn't really handle plug-and-play very well, as evidenced by this thread:
http://www.mathworks.com/matlabcentral/newsreader/view_thread/311133
长话短说:如果要让MATLAB检测硬件更改，则需要重新启动它. MATLAB似乎仅在启动时寻找设备.
Long story short: if you want MATLAB to detect a hardware change, you need to restart it. MATLAB seems to only look for devices when it starts up.
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