Technical Articles Archives - Page 21 of 113

High-Performance 64-bit General Development Board ODROID-C2

Professional open-source development platform hardware supplier — Hardkernel has previously released a 64-bit high-performance general development board for global developers, this board, codenamed ODROID-C2, is priced at 40 dollars and is currently being publicly sold on its official homepage.

(ODROID-C2)

ODROID-C2 has a body size of 85 x 56 mm, weighs 40g, and uses the Amlogic 64-bit application processor S905 (4-core ARM Cortex-A53 CPU, 5-core Mali-450@750MHz+ GPU), with a main frequency of up to 2.0GHz,

2025-01-13

Comprehensive Overview of Huawei HarmonyOS Ecosystem

"Harmony + Euler" are the two operating systems that Huawei is focusing on developing, which is Huawei's "soul-casting" project.

Euler not only serves Kunpeng but also supports X86, positioning itself as an operating system for servers, edge computing, cloud, and embedded devices.

Harmony serves smart terminals, the Internet of Things, and industrial terminals, and is more suitable for general public use, mainly used in familiar devices including smartphones, computers, cars, home appliances, etc.

OpenEuler and OpenHarmony ecosystems are interoperable:

Comprehensive Overview of Huawei </div>
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Design of an ADS-B Signal Receiver Based on Software Defined Radio

Abstract: In order to obtain track information in a timely manner, a software defined radio receiver system for Automatic Dependent Surveillance-Broadcast (ADS-B) signals is designed based on the RF front-end chip AD9361 and the baseband data processing chip Zynq-7000. A detailed hardware framework design is provided, a Linux platform is established, and the AD9361 register configuration work is completed. Tests show that when the signal-to-noise ratio exceeds 6 dB, the detection probability of the receiving system exceeds 60%; during actual

2025-01-13

Getting Started with Arduino for Beginners

In portfolios, we often see many devices implemented using Arduino, which could be interactive devices or artistic installations. Many students are interested in Arduino and enjoy working on related projects, finding them quite engaging. Today, Teacher Cheng from Mark Pen Design Study Abroad will discuss Arduino-related knowledge to help interested students get started.

Arduino is a convenient, flexible, and easy-to-use open-source electronic prototyping platform. It includes hardware (various models of Arduino boards) and software (Arduino IDE). Why do we say

2025-01-13

Understanding the Architecture of Arm Cortex-A53 Cache

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This article is authorized and reprinted from the WeChat public account Arm Selected. This article mainly shares the architecture interpretation of A53 cache.

1 A53 uses the classic big-LITTLE architecture

Below is an early classic big-LITTLE architecture diagram.

Understanding the Architecture of Arm Cortex-A53 Cache

Figure 1

Figure 2

2 A53's cache configuration

L1 I-Cache

● Configurable: 8KB, 16KB, 32KB, or 64KB

● Cache line: 64 bytes

● 2-way set associative

●

2025-01-13

Getting Started with OpenWRT: Writing Firmware to USB for x86 Soft Routing

Recently, I've noticed that many friends want to try the soft routing system OpenWRT. Today, we're starting to update various posts related to soft routing!

What is a soft router?

A soft router refers to using a desktop or server with software to create a routing solution, mainly relying on software settings to achieve the functions of a router; while a hard router uses specialized hardware, including processors, power supplies, and embedded software, to provide predefined router functions.
Baidu Encyclopedia

In simple terms, it

2025-01-13

Building a Low-Cost Home Storage Server: Part One

This article documents the process of building a backup server.

Introduction

This year, I considered building a dedicated machine for data backup. Firstly, due to increased travel demands this year, the historical devices have been used for several years, and I need a newer device to take over; secondly, I want to verify the reliability of the solution to address some production environment needs I have encountered and my friends' issues.

Since I have already purchased several Synology devices, and this year the

2025-01-13

How to Effectively Clean Dust from Your Computer Fan

In daily life and work, whether it is the electric fan used for cooling or the fan used for heat dissipation in devices, after a period of use, a large amount of dust often accumulates. This not only affects aesthetics but also has a negative impact on the performance and lifespan of the device. So, why does so much dust accumulate on the fan? What impact does the dust on

2025-01-13

IoT Gateway Development: Design Process Based on MQTT Message Bus (Part 2)

Dao Ge's 022nd Original Article

1. Introduction
2. MQTT Connection with Cloud Platform
3. Proc_Bridge Process: The Bridge Between External and Internal Message Buses
4. Conclusion

1. Introduction

In the previous article "IoT Gateway Development: Design Process Based on MQTT Message Bus (Part 1)", we discussed how to utilize the MQTT message bus in an IoT system's gateway to achieve inter-process communication within an embedded system.

The main advantages of this communication model are:

Decoupling between modules;
Parallel development of each module;
Delegating TCP connection and packet fragmentation issues to

2025-01-13

Getting Started with Remi Pi: FreeRTOS and LVGL Tutorial

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Source | Mil Electronics

Earlier this year, I shared that the Remi Pi development board was launched!

Today I would like to share a quick start tutorial for the Remi Pi.

1. System Overview

The Remi Pi's myir-image-core system is built on Yocto and includes an LVGL

2025-01-13

Category: Technical Articles

Introduction

1. Introduction

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