Click the “blue words” above to follow us! 2025.06.18 Word count: 5056 Estimated reading time: 13 minutes Abstract This article proposes a design for a secure and trusted circuit based on the security requirements of the boot process for embedded devices, achieving a trusted embedded system. The design method of this secure and trusted circuit … Read more
This is a further refinement of the Cortex-M3 programming model, covering more specific implementation details and key operations: 1. Refinement of Register Groups 1. Detailed Explanation of Special Registers CONTROL Register (32 bits, modifiable only at privileged level) Bit 0 (`nPRIV`): 0 = Privileged mode (can access all resources) 1 = Unprivileged mode (restricted access) … Read more
The Cortex-M3 and Cortex-M4 processors utilize a 32-bit architecture, with internal registers in the register set, a 32-bit data path, and bus interfaces, employing Thumb-2 technology that supports both 16-bit and 32-bit instructions. They feature the following characteristics: Three-stage pipeline design Harvard bus architecture (I-BUS, D-BUS) 32-bit addressing AMBA bus interface NVIC interrupt controller, supporting … Read more
·1. Test Code ·2. Cross Compilation oCommand Structure oFunction of Each Part ·3. Execute Test ·4. Environment Variable `$PATH` o4.1 System-level Configuration Files (Global Settings) o4.2 User-level Configuration Files (Personal Settings) o4.3 Shell Built-in Defaults ·5. How to Find the Source of the Current `PATH`? ·Common Modification Scenarios 1. Test Code // test_sqlite.c #include <stdio.h> … Read more
Recently graduated friends, do you find hardware and programming daunting? However, with the right approach, these can be easily mastered. Today, I will share how university graduates from non-electronic information majors can easily understand hardware and quickly learn Arduino programming to engage in IoT in the future. Easy Learning of Hardware Basics Many people are … Read more
1. Core Technology Analysis 1️⃣ Working Principle Light sensors convert light signals into electrical signals through photosensitive elements (such as photodiodes and photoresistors) to detect environmental brightness. Common types include: Photodiodes: High sensitivity, used for precision measurement Photoresistors: Low cost, suitable for basic scenarios Digital Sensors (e.g., TSL2561, BH1750): Built-in ADC chips, directly output digital … Read more
In recent years, incidents of supply chain constraints have become frequent. Although the two recent incidents are not directly related to our country, they inevitably evoke a sense of loss and concern. First, ARM’s cancellation of the instruction set architecture license to Qualcomm indicates that commercial reputation is worthless in the face of economic interests. … Read more
Source: Fresh Date Classroom Original Author: Little Date Jun We use operating systems every day. Windows, Linux, Android, and iOS are all classic operating systems. With them, we can better utilize hardware terminal devices like computers and smartphones. So, what is the essence of an operating system? What functions and features does it have? What … Read more
Source: Tom Talks Chip Manufacturing Original Author: Tom Both 2D NAND and 3D NAND are types of non-volatile memory technology (NVM Non-Volatile Memory), which falls under the category of Memory. So, with 2D NAND available, why upgrade to 3D? Definition Non-volatile memory technology is a type of memory technology that retains stored data even when … Read more
Click the blue text to follow us In 2022, facing the rapid evolution of global changes and the impact of the COVID-19 pandemic, under the strong leadership of the Party Central Committee with Xi Jinping at its core, various regions and departments efficiently coordinated epidemic prevention and control with economic and social development, increasing … Read more