Instruction Register (IR) 指令寄存器 The purpose of the Instruction Register (IR) is to shift in instructions via the TDI signal. Additionally, the instruction register can hold the current instruction until the new instruction is completely shifted in. Generally, an IR consists of two registers as shown in Figure 1. The Hold register stores the previous … Read more
Boundary Scan Technology can not only test the logical functions of chips or PCBs but also check for faults in the connections between IC (Integrated Circuit) and PCB (Printed Circuit Board). Therefore, it has become mainstream in the design for testability of digital systems. The IEEE established the relevant standard, IEEE 1149.1, in 1990, which … Read more
01 Introduction to JTAG JTAG (Joint Test Action Group) is an interface established by a group called the JTAG group, founded in 1985. In 1990, IEEE deemed everything appropriate and released IEEE Standard 1149.1-1990, named the Standard Test Access Port and Boundary-Scan Architecture, which is the renowned JTAG. Do you know the three main functions … Read more
After familiarizing ourselves with the JTAG architecture through a series of previous articles, let’s take a complete example to understand how the TAP used for Debug access works. Assuming a debugging scenario where we need JTAG to access and modify a 3-bit wide control signal due to debugging requirements. In normal functional mode, the value … Read more
1. The Energy Consumption Dilemma in Embedded Development In today’s technological wave, embedded devices have permeated every aspect of life. From smart wristbands and smart home controllers to sensor nodes in industrial automation and automotive electronic systems, they act as the “unsung heroes” behind the scenes, silently driving the realization of various functions. However, most … Read more
The previous article “Analysis of WiFi Configuration Scripts in Embedded Linux” introduced how to configure WiFi on embedded Linux development boards using shell scripts to call tools like wpa_supplicant. This article will introduce how to achieve the same functionality through C++ programming. 1. Preparation My development board previously had a script set to automatically start … Read more
1. Why Choose C++ for Arduino Embedded Development? In the vast realm of embedded development, Arduino is renowned, acting as a universal key that easily opens the door to the combination of creativity and practice, allowing countless electronics enthusiasts and professional developers to bring their brilliant ideas to life. From the convenient control of smart … Read more
Creating a Mini Embedded Database with C++ – A Practical Journey from 0 to 1 Databases might sound intimidating, but we can actually create a simple one using C++. Today, I will guide you in implementing a lightweight embedded database that, despite its small size, is fully functional with basic CRUD capabilities. This small project … Read more
The “Data Heart” of Embedded Systems In today’s digital wave, embedded systems are like ubiquitous “behind-the-scenes heroes,” deeply integrated into our lives. From the thoughtful control of smart homes to the precise operation of industrial automation, and the life-saving capabilities of medical devices, embedded systems play a crucial role. Among them, embedded database systems act … Read more
1. What Sparks When C++ Meets Embedded Development? In our daily lives, electronic products come in various forms, from smartphones and smartwatches to electronic control systems in cars and automation equipment on industrial production lines. Embedded systems are truly ubiquitous. They act as the “hidden brain” of these devices, silently controlling everything, often with high … Read more