Read serial input from /dev/tty in linux

2 次查看（过去 30 天）
Christian Wittpahl
Christian Wittpahl 2016-10-28
评论： Christian Wittpahl 2016-10-28
I'm trying to visualize the input of a serial device. The device lies in "/dev/ttyACM0". I already found out, that MATLAB doesn't read this kind of device, so I made a link to it called "/dev/ttyS101". I can perfectly read the output of the device using "cat" in the console, but if I try using fopen() in MATLAB I always get this response:
Error using serial/fopen (line 72)
Open failed: Port: ttyS101 is not available. No ports are
available.
Use INSTRFIND to determine if other instrument objects are
connected to the requested device.
I don't have the "Instrument Control Toolbox" installed, is that the problem?

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2016-10-28
instrfind() is part of MATLAB these days.
Check the ownership and permissions on /dev/ttyS101 . It would not be uncommon for it to have been configured without "other" access.
  1 个评论
Christian Wittpahl
Christian Wittpahl 2016-10-28
You were half right! the ownership of /dev/ttyS101 was alright, but the /var/lock folder was owned by root, while matlab was trying to create a file/folder there.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 MATLAB 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by