The Hezhao low-power 4G module classic model Air780E,supports two software development methods: one is the traditional AT command; the other is Open development based on the module. The traditional AT command development method has little difference in software from other module brands in the industry, but has more advantages in hardware power consumption; For module … Read more
Introduction Let me vent a bit first, shit! shit! shit!, what a pain in the ass with the reuse! The board used in the example is: <span>Zhongdian Atom ESP32S3 Development Board + 1.3 inch LCD Module</span> Code repository address: <span>https://github.com/loogg/esp32_learning</span> Development Environment IDF: <span>5.3.2</span> Copy the <span>idf_v5.3.patch</span> from the repository to the <span>idf</span> path and … Read more
The USB interface, with its plug-and-play versatility and strong compatibility, has almost become the connection bridge for all electronic devices, from keyboards and mice to external hard drives and webcams. However, almost all high-resolution cameras use the MIPI interface instead of the convenient USB. Wouldn’t it be easier to connect all peripherals through a HUB … Read more
As a “jack of all trades” in the embedded field, the configuration of high-speed interfaces in STM32 directly determines the data throughput capability of devices. From USB 3.0 to Gigabit Ethernet, what high-speed communication features are hidden in different series and models? This article gets to the core, listing key interfaces and technical parameters. USB … Read more
USB, short for <span>Universal Serial Bus</span>, has long been an indispensable technology in our daily lives. From connecting keyboards and mice to PCs to enabling communication between embedded devices and hosts, USB has revolutionized peripheral connectivity with its simplicity and robust compatibility. The Birth of USB Let’s take a look at the PC usage scenario … Read more
Introduction: JTAG stands for Joint Test Action Group, which is commonly referred to in the IEEE standard 1149.1 as the Standard Test Access Port and Boundary Scan Architecture. Its functionality is powerful, but for engineers engaged in embedded development, the most frequently used feature is programming chips, which typically requires a dedicated emulator. This article … Read more
When designing PCBs, the design requirements for common hardware interfaces are crucial for ensuring circuit performance and stability. Below are some common hardware interface PCB design requirements: 1. USB Interface Design Requirements ① Total length control: Keep it within 1800 mils as much as possible. ② Differential pair characteristic impedance: 90Ω. ③ Power pin trace … Read more
MTK MediaTek Platform 4G Android Core Board: XY6739CW (Based on MT6739):SupportsUSB 2.0High-Speed Mode; Supports USB OTG XY8766(Based on MT8766):SupportsUSB 2.0High-Speed Mode; Supports USB OTG XY6762(Based on MT6762/Helio P22):SupportsUSB 2.0High-Speed Mode; Supports USB OTG XY8768(Based on MT8768):SupportsUSB 2.0High-Speed Mode; Supports USB OTG XY6765CA(Based on MT6765/Helio P35):SupportsUSB 2.0High-Speed Mode; Supports USB OTG XY6771CZ(Based on MT6765/Helio P60):SupportsUSB 2.0High-Speed … Read more
•Official Documentation These two official documents provide a detailed description of the protocol and hardware features, along with some code explanations. “USB Training_Part1_Protocol.pdf”, “USB CDC Class Introduction Training.pdf” Reference website:https://www.usbzh.com/ •Library ExamplesUser-related files usbd_desc.c: This file provides the USBD descriptors and string formatting method. usbd_conf.c: This file implements the USB Device library callbacks and MSP. … Read more
Table of Contents Introduction: Interface Protocols – The “Digital Language” of Embedded Systems 1. Low-Speed Communication Interfaces: Efficient Solutions for Simple Scenarios 2. High-Speed Communication Interfaces: The Backbone of Large Data Transmission 3. Specialized Domain Interfaces: “Specialists” for Specific Scenarios 4. Practical Applications and Selection Guide for Interface Protocols 5. Interactive Poll: Which Embedded Interface … Read more