Search on WeChatAutomation Knowledge Base Hello everyone! Today I want to talk about a knowledge point that I learned through practical experience—how PLCs control stepper motors. I remember the first time I encountered a stepper motor, I spent a long time looking at the manual, my mind filled with terms like “pulse count” and “frequency”. … Read more
Last year, the product developed by the company utilized CAN, and it is still in use now. I would like to recall and organize the previous work for future reference.First, let me present the circuit diagram. 1. Header File (can_driver.h) #ifndef __CAN_DRIVER_H #define __CAN_DRIVER_H #include "stm32f10x.h" // CAN frame type definition typedef enum { CAN_FRAME_STD … Read more
Stepper motors are commonly used for positioning control, and their rotation angle (which can also be considered as distance) is controlled by the number of pulses output from the PLC. The frequency of the pulses controls the speed of the stepper motor. For applications where control precision is not critical, this method is simple, economical, … Read more
In-Depth Analysis of Linux NVMe Driver: From Principles to Practice 1 NVMe Protocol Basics: Why a New Generation Storage Protocol is Needed In traditional storage technology, the AHCI protocol for SAS and SATA interfaces has long been the mainstream standard for hard disk communication. However, with the rapid development of flash memory technology, these interface … Read more
In-Depth Analysis of Linux NVMe Driver: From Principles to Practice 1 NVMe Protocol Basics: Why a New Generation Storage Protocol is Needed In traditional storage technologies, the AHCI protocol for SAS and SATA interfaces has long been the mainstream standard for hard disk communication. However, with the rapid development of flash memory technology, these interface … Read more
CVE-2021-42008 is a Slab-Out-Of-Bounds Write vulnerability in the Linux 6pack driver, caused by a lack of size validation checks in the decode_data function. Malicious input from a process with CAP_NET_ADMIN capabilities may lead to an overflow of the Cooked_buf field in the Sixpack structure, resulting in kernel memory corruption. If exploited correctly, this could lead … Read more