Detailed Usage Notes for Raspberry Pi JTAG 1. Introduction 2. Environment Setup 2.1 Hardware Connection 2.2 Software Preparation 3. Conclusion 1. Introduction Sometimes, when debugging code, hardware debugging tools are often used, and JTAG is a very good debugging tool. Below is a detailed introduction on how to use JTAG for debugging on the Raspberry … Read more
Author:Hcamael@Zhidao Chuangyu 404 Laboratory Recently, while working on a router, I accidentally bricked the CFE and found that I could recover it via JTAG, so I conducted some research on JTAG. Initially, I just wanted to recover the device and didn’t intend to delve deeper into the research. Recovery Attempts The bricked router model is:LinkSys … Read more
What is the JTAG Interface? Visually, the JTAG interface is the blue 20-pin connector shown in the image above. What is the Purpose of the JTAG Interface? To download programs to the microcontroller. To debug the microcontroller online, such as step debugging, power-off debugging, viewing register values, etc. Does the JTAG interface for STM32 need … Read more
In the ECU software development process, software debugging or testing often involves the JTAG interface, which is used through the JTAG protocol with emulators/debuggers such as JLink, ST-LINK, and Lauterbach for online debugging of software programs. Although many use it daily, not everyone is familiar with it. Therefore, this article intends to provide a brief … Read more
For embedded developers and hardware hackers, JTAG is the standard for debugging and accessing microprocessor registers. This protocol has been in use for many years and is still used today. The JTAG debugging interface requires VCC, GND power signals, and four debugging signals: TMS, TCK, TDI, and TDO. Additionally, TRST and RESET reset signals and … Read more
1. Definition: – JTAG (Joint Test Action Group) is a standard for testing and debugging integrated circuits, widely used in embedded systems development. 2. Purpose: – To debug, test, and program embedded systems, allowing developers to inspect and manipulate the internal state of the processor. 3. Components: – The Test Access Port (TAP) controller manages … Read more
Hello everyone, I am Pi Zi Heng, a serious tech enthusiast. Today, I will talk about the interface standard JTAG in embedded debugging. In embedded development, it is inevitable to simulate and debug code, especially when the application logic becomes complex to a certain extent. It is common to introduce some logical bugs while writing … Read more
1. Introduction Previously, we sharedhttps://mp.weixin.qq.com/s/BeL6UbSg2HI9qKemZugOhw?token=1054074707&lang=zh_CN the article titled“Low-Cost Learning FPGA Based on“Mining Board”” which usesJTAG boundary scan for quick pin correspondence reverse engineering.. Not only forFPGAs, but we can also useJTAG for boundary scan testing inMCUs, provided that the corresponding chip supports this feature and the manufacturer providesBSDL files. Here, we will demonstrate using theLPC1857 … Read more
1 Description in the JTAG Standard Latest JTAG standard: IEEE_std_1149.1-2001 Figure 1 JTAG Principle 1.1 TMS TMS is the start enable signal (Standard PAGE-11), pull-up: 1.2 TCK TCK is the clock signal (Standard PAGE-9) effective on the rising or falling edge, can be pulled up or pulled down, depending on specific device requirements: 1.3 TDI … Read more
This article mainly introduces the terms related to JTAG that are easily confused: JTAG JTAG (Joint Test Action Group): In the early application of chips, different manufacturers had different testing methods for chips, making the joint testing of chips and boards very difficult. A unified testing method was needed to solve this problem. The JTAG … Read more