Year: 2025

Advanced Embedded Development: Performance Optimization, Kernel Analysis, Secure Build, and Architecture Design

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Advanced Embedded Development: Performance Optimization, Kernel Analysis, Secure Build, and Architecture Design

Source | Embedded Miscellany Today, I will share some commonly applicable skills for advanced embedded software development. Embedded Performance Optimization Cheng Kefe in “Embedded System Design” points out that system-level optimization is key to enhancing the competitiveness of embedded software, which should be approached from three dimensions: code efficiency, resource utilization, and real-time performance. Embedded … Read more

Why IO Priority Cannot Enhance Your App’s Performance?

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Why IO Priority Cannot Enhance Your App's Performance?

When hearing about priority, those involved in performance optimization often consider whether it can be applied to our business. For example: <strong><span><span>ionice -c1 -n0</span></span></strong>, hoping it can improve application performance. But this may just be wishful thinking. Business Process: The process reads and writes data through read write, to the kernel, then to the VFS … Read more

Chapter 2: The Various Faces of PMIC

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Chapter 2: The Various Faces of PMIC

PMIC stands for Palau Marine Industries Co. To discuss PMIC, we must first talk about a person named Wenhua. Wenhua is the Taiwanese compatriot who provided the second-hand fiberglass longline fishing boats purchased from Taiwan for the COSCO project. His father was a major general in the Kuomintang army. According to him, his father was … Read more

Qualcomm’s ADAS White Paper: Shaping Easy-to-Drive, Affordable, and Safe New Cars in China

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Qualcomm's ADAS White Paper: Shaping Easy-to-Drive, Affordable, and Safe New Cars in China

Once upon a time, there were jokes about forgetting how to drive a manual transmission vehicle; perhaps in the not-so-distant future, we will hear similar remarks: I wouldn’t dare touch a car without ADAS. Almost every driver and passenger can feel the tremendous changes that have occurred in automobiles in recent years, from the once-optional … Read more

TARA Analysis of In-Vehicle Infotainment Systems

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TARA Analysis of In-Vehicle Infotainment Systems

Source: Niuka Network Abstract In modern vehicles, high-performance computing (HPC) systems for infotainment play a crucial role in enhancing the experience of drivers and passengers by providing advanced features such as music, navigation, communication, and entertainment. This system utilizes technologies such as Wi-Fi, cellular networks, NFC, and Bluetooth to ensure continuous internet connectivity for information … Read more

The In-Car Entertainment System of Li Auto: What Hidden Features Are There?

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The In-Car Entertainment System of Li Auto: What Hidden Features Are There?

As a leader among new car manufacturers, Li Auto not only excels in range and space but also hides many surprising “treasure features” in its in-car entertainment system. Today, we will unveil these practical features that you may not know about. 1. Co-Driver Entertainment Screen: More Than Just Watching Movies The co-driver entertainment screen of … Read more

Unexpected Swimming Record: Smartwatch Goes for a Swim in the Washing Machine

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Unexpected Swimming Record: Smartwatch Goes for a Swim in the Washing Machine

Reported by / Comprehensive report from our newspaper Many people are accustomed to wearing smartwatches, which are not only convenient but also capable of analyzing personal health status in real-time. A Japanese netizen shared that one day he suddenly received a notification on his phone praising him for completing “19 minutes of swimming exercise,” which … Read more

When Smartwatches Meet Baduanjin: A New Interpretation of Tradition in 2025

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When Smartwatches Meet Baduanjin: A New Interpretation of Tradition in 2025

At 6:30 AM in the park, a post-2000s individual wearing a sports tank top practices Baduanjin while following a live stream on their phone, with a smartwatch on their wrist recording their heart rate in real-time. Nearby, Aunt Wang’s radio also broadcasts the same set of exercises. This seemingly incongruous scene has become a snapshot … Read more

Audio on Smartwatches (Part 5): Recording

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Audio on Smartwatches (Part 5): Recording

In the previous article (Audio on Smartwatches (Part 4): Voice Calls), we discussed voice calls. This article focuses on recording. The recording function saves the captured audio as a file. The supported file formats are two: one is PCM (16K sampling) in WAV format, and the other is AMR-NB (8K sampling) in AMR format. The … Read more

Siemens S7-1200: Version Management and Change Tracking Technology for Industrial Control Systems

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Siemens S7-1200: Version Management and Change Tracking Technology for Industrial Control Systems

Industrial control programs are like a constantly revised “operation manual”. Today, the motor start logic is modified, tomorrow the temperature control parameters are adjusted, and the day after, new safety interlocks are added. Without version management, it is as frustrating as searching for books in a library without a catalog. The S7-1200, through TIA Portal’s … Read more