Anno
2025
10 letters
Wed, October 15
Hachimi Paradise!
关爱唐氏

Hachimi Paradise!

Hachimi World is an open-source community for sharing Hachimi music, currently under development. It features a multi-platform client compatible with Windows, iOS, Mac, Linux, Android, and web. The music player offers a top-notch experience but is limited to community-uploaded content and does not support local music playback. The project is actively being updated.

Letter №46Read full note →
Wed, September 10
关爱唐氏

The Trendiest AI Agent Game Right Now — Aivilization

Aivilization is an AI agent game where players guide AI-controlled characters using prompts instead of direct commands. The player found it engaging, creating a character with MBTI traits that felt like a version of themselves. Registration requires invite codes, which can be obtained by chatting with a character on the website. Gameplay advice includes starting with food like apples and focusing on earning money to build chips, as learning is inefficient early on. The public test ended with a summary report for participants, and the game was later reset for a restart, with the player reminiscing about their character's experiences.

Letter №45Read full note →
Wed, September 10
残片纸堆

A Simple Way to Check the GD32 Clock

GD32 microcontrollers lack a straightforward graphical clock tree like STM32, and the clock tree in the chip manual often mismatches the code. Users need to manually check frequencies on buses after division and multiplication, using enumerations and macros such as HXTAL_VALUE in header files for external crystal frequency setup.

Letter №44Read full note →
Fri, August 22

The RS-485 Mystery

A product's 485 communication failed in the field, with the device stuck in transmit mode and unresponsive. Investigation revealed the issue was due to relying on UART interrupts (without DMA) to manage the half-duplex IC state switch. Under certain interference, the interrupt for detecting transmission completion was missed, leaving the IC in transmit mode. The author contrasts this with using DMA, which provides reliable channel completion interrupts. The recommended fix is to implement a polling mechanism to monitor the transmission state and force a switch to receive mode when idle, rather than relying solely on interrupt-driven state changes. This addresses the fundamental mismatch between interrupt-based data management and the channel-based nature of RS-485.

Letter №43Read full note →
Wed, July 23

Make VSCode's C/C++ Semantic Parsing Ignore Keywords It Doesn't Recognize

Some compilers like TI's DSP toolchain lack good VSCode support and have unusual keywords, hindering semantic parsing. A solution is to define these keywords as empty in the C/C++ plugin's define setting, e.g., setting `interrupt` to nothing (with an equals sign for an empty definition).

Letter №42Read full note →
Tue, July 15

EdgeOne Winning Luck

The person got drawn on the second attempt and remarks that the probability is quite high.

Letter №41Read full note →
Mon, July 7

Python app on Windows 7 reports missing api-ms-win-core-path-l1-1-0.dll

A Win7 error occurred due to a missing api-ms-win-core-path-l1-1-0.dll file while using 32-bit Python. The solution was to downgrade Python to version 3.8.8 or below 3.9. Other fixes like DLL repair tools or patches were ineffective. The user also noted network issues accessing official websites, which were caused by Google API header replacement.

Letter №40Read full note →
Tue, June 10
残片纸堆

A Short Note on strlen

The glibc strlen implementation uses a bitwise trick to check multiple bytes at once for null characters (0x00). By treating 4 bytes as a 32-bit value, it subtracts a mask (lomagic) and applies bitwise operations to detect any zero byte via borrow propagation. This avoids slow byte-by-byte comparisons, improving performance on architectures where branching is expensive.

Letter №39Read full note →
Mon, May 12
残片纸堆

New freebie cloud service: Claw Cloud

A new free cloud service channel, ClawCloud, allows users to build cloud disks, lightweight cloud services, etc. GitHub accounts registered for about a year or more can log in and receive a free $5 monthly credit. Deployments must stay under $0.16/day to remain free. Creating databases or object storage is slow, taking several hours. The author used it to set up an RSSHub instance.

Letter №38Read full note →
Sun, April 27
残片纸堆

Sharing My Reading: “Multithreading and Thread Synchronization”

The text highlights two articles from Meituan Tech. The first explains multi-threading and synchronization, focusing on handling shared resources in multi-core systems using critical sections. The second discusses UI interaction intent clusters and design hierarchy, particularly in the 'Implementation Exploration' section, for scientifically designing UI interactions.

Letter №37Read full note →