Click the blue 'Arm Selection' at the top left and select 'Mark as Favorite' 1. Concepts of Exceptions and Interrupts AArch64 exception and interrupt handling In the AArch64 architecture, exceptions and interrupts are one of the key mechanisms to ensure the normal operation of the system. An exception refers to a situation where the system … Read more
When the MCU code crashes, first determine whether the current stack being used is the MSP (Main Stack) or the PSP (Process Stack). After an exception occurs, the stack order of the ARM core is as follows: R0-> R1->R2->R3->R12->LR->PC->XPSR The LR (R14) register is the link register, which stores the exception return value EXC_RETURN where … Read more
Introduction: In embedded system development, Real-Time Operating Systems (RTOS) play a crucial role in effectively managing the execution of multiple tasks, enhancing system concurrency and response speed. FreeRTOS, as a widely used open-source RTOS, has core design concepts and implementation mechanisms that are worth in-depth study and learning. To better understand how an RTOS works, … Read more
Thread Management: A Terminal Solution for Python Thread Management As Python developers, we have all encountered the problem of chaotic thread management—threads are difficult to track after creation, cannot be gracefully stopped when exceptions occur, and their runtime status is opaque. This article introduces a concise terminal thread management solution that requires less than 100 … Read more
If you’re new to Python, do you often panic when your code throws an error? In fact, those red error messages are not to be feared; they are Python’s friendly way of telling you, “There’s a problem here.” Today, let’s talk about Python’s specialized “exception handling mechanism” that will help you not fear errors and … Read more
Floating Point Representation The representation of floating-point numbers follows the IEEE 754 standard, including single precision, double precision, and half precision floating-point numbers. Each floating-point number has a sign bit, an exponent, and a fraction part. Single Precision Floating Point (32 bits) Bit 31: Sign bit (0 indicates positive, 1 indicates negative). Bits 30-23: Exponent … Read more
In embedded system development, microcontroller crashes are one of the most troublesome issues. Once the system crashes, it can affect user experience at best, and at worst, it may lead to device damage or safety incidents. Common Causes of Crashes Classification of Causes Hardware Level • Unstable Power Supply: Voltage fluctuations, excessive ripple • Clock … Read more
The “Readability Crisis” of C++ Compilation Results The assembly code generated from C++ is indeed more complex than that of C, but this complexity follows certain rules: ; C language malloc call push 16 ; allocate size call malloc add esp, 4 ; C++ new operator call push 16 ; allocate size call ??2@YAPAXI@Z ; … Read more
Welcometo like, share, and followto encourage me If you find this article useful, please 👇👇follow me👇👇 Let me accompany you on your journey to grow and succeed Hey, programming enthusiasts! Are you looking for a simple and effective way to handle HTTP requests in C#? Or have you tried other methods but are confused about … Read more
Assembly Level Analysis of Header File Declaration Issues When C++ references a C header file without adding <span>extern "C"</span>, it leads to name mangling issues: ; C-style function without processing call ?ExAllocatePoolWithTag@@YAPEAXW4_POOL_TYPE@@KPEAD@Z ; C++ mangled name ; Correct usage with extern "C" call ExAllocatePoolWithTag ; Original C name The correct approach when including <span>ntifs.h</span> is: … Read more