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Through the use of Operating System services,user applications can access external devices connected to universal serial bus (USB)controllers on the linux platform. When the USB device connected to the Linux system is disconnected,the External Device interrupt (IRQ) is triggered,and the device could not be accessed normally by the Operating System and the service.In this article,we will explore ways to handle interruptions in Linux USB devices.
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The first way is to use the “ps” program. This program will tell You which user process is interrupting the USB device. It is important to note that this only works if you have root access,because the “ps” program will report system-wide processes,not just the ones related to your user. Once you find the interrupting process,you can either ignore it or kill it so the Operating System can recognize the USB device.
The second way is to use the “udevadm monitor” command. This will log all the system events related to the USB device,including the interrupt. You can use this log to identify the process that is causing the interrupt. Then,you can use the same process as before to either ignore or kill the process.
The third way is to use the “callback-handler” framebuffer. This framebuffer handles the transfer of data that is received from the USB device to the host. If the interrupt happens during the transfer,the framebuffer is the one that should be responsible for handling the interrupt. This framebuffer can be used to ignore or kill the interrupting process.
Finally,the fourth way is to use the “attach-interrupt-handler” software. This software provides a generic way to attach any software interrupt handler to any USB controller in the system. So,if you encounter a USB device that is interrupting the system and no other solutions have worked,you can try this software and attach a handler to the USB controller. This will tell the Operating System to redirect the interrupt to the appropriate handler,which should resolve the issue.
In conclusion,there are several ways to handle interruptions from Linux USB devices. Depending on the issue and the Operating System you are running,you can use any of the four solutions discussed in this article to resolve the problem.
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網(wǎng)站標(biāo)題：處理LinuxUSB設(shè)備中斷的方法（linuxusb中斷）
文章起源：http://www.dlmjj.cn/article/djcdoep.html
