强制从pyserial释放串口
[英]Forcing serial port release from pyserial
问题描述
When my application crashes, some of the serial ports apparently remain locked and I have no choice but to reboot the Raspberry Pi.
当我的应用程序崩溃时，某些串行端口显然保持锁定状态，我别无选择，只能重新启动 Raspberry Pi。
I was wondering if there is a way to ensure that, before crashing, the ports are released.我想知道是否有办法确保在崩溃之前释放端口。 Another alternative would be to create a function that forces the release of a certain port when my code starts.另一种选择是创建一个 function，它在我的代码启动时强制释放某个端口。
Is there such a thing within pyserial , or another Python library? pyserial或另一个 Python 库中是否有这样的东西？
1 个解决方案
解决方案1
1 2022-12-10 01:59:46
You have the command top to list all applications that are running.您可以使用命令top列出所有正在运行的应用程序。
You can retrieve your PID of the instance of your application and terminate it with the command kill -9 YOUR_PID .您可以检索应用程序实例的 PID 并使用命令kill -9 YOUR_PID终止它。
Killing the app will free your serial port.杀死该应用程序将释放您的串行端口。
Else you can open your serial port with exclusive to False : https://pyserial.readthedocs.io/en/latest/pyserial_api.html#serial.Serial否则你可以用False exclusive打开你的串口： https://pyserial.readthedocs.io/en/latest/pyserial_api.html#serial.Serial
A port cannot be opened in exclusive access mode if it is already open in exclusive access mode.
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