I need to write commands to serial port
1 view (last 30 days)
Show older comments
I just try to communicate with serial port. Every time when i use the fopen(s), it gives me error
??? Error using ==> serial.fopen at 72 Port: COM3 is not available. No ports are available. Use INSTRFIND to determine if other instrument objects are connected to the requested device.
I don't know what to do to preserve the port for communication between matlab and serial port
0 Comments
Answers (1)
Walter Roberson
on 17 Oct 2013
Use instrfind() to determine whether COM3 is already open. It might, for example, be open if you had fopen()'d it before and had your program crash and you did not fclose() it afterwards.
2 Comments
See Also
Categories
Find more on Startup and Shutdown in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!