Disturbance

Linux USB Device Driver Model

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Linux USB Device Driver Model

Linux kernel source: include/linux/usb.h Linux kernel source: drivers/hid/usbhid/usbmouse.c 1. BUS/DEV/DRV Model “USB Interface” is a logical USB device, and the usb_driver driver written supports the “USB interface”: After the USB controller or Hub recognizes the USB device, it will create and register usb_device Once usb_device is claimed by the driver in “drivers/usb/core/generic.c”, it will select … Read more

Improving RS-485 Bus Immunity to EFT Disturbances

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Improving RS-485 Bus Immunity to EFT Disturbances

The RS-485 bus is a commonly used field bus in industrial communications, but industrial control environments are often harsh, and the bus can be subjected to various external disturbances that affect its reliability. Among these, Electrical Fast Transient (EFT) disturbances are common. Today, we will discuss how to test and eliminate the impact of pulse … Read more