Originally created by: Viacheslav Mezentsev

RaspberryPi B, CoDeSys 3.5.10.x

Example project.

You can try keyboard for example (you need to change path, see: ls /dev/input/by-path on your device):

fileName: string := '/dev/input/by-path/platform-3f980000.usb-usb-0:1.3:1.0-event-kbd';

Steps to reproduce the problem:

1. Login and download the project.
2. Run project.
3. Logout.
4. Build/Clean.
5. Login ... CoDeSys loses connection with runtime.

Worked with all events and not only with SysFileAsync library (CAA File with the same result).

So the question: Why CoDeSys 3.5.10.x loses connection in this case?

How to restore connection:

sudo /etc/init.d/codesyscontrol stop
sudo rm -R /root/PlcLogic
sudo /etc/init.d/codesyscontrol start

Originally created by: Viacheslav Mezentsev

Video: https://youtu.be/bGNL8n5qV64 m

Originally created by: Viacheslav Mezentsev

A temporary solution to the problem. You need to create a global Boolean flag. Use it to free the file handle manually without leaving debugging (assign a hotkey, for example). When the handle is released, you can exit debugging.

This means that the runtime cannot properly close the handle of such file.

Originally created by: Viacheslav Mezentsev

Undocumented solution (rus).

There I show a trick which will help to solve this problem, but the runtime developers should not relax and must correct the connection loss bug. I need this not for raspberry pi. This is just an example which works not only for raspberry but for other linux platforms too.