# JTAG

Published articles for JTAG.

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## Can you design a chip? Announcing the protocol emulator ASIC competition

DevFeed: [Can you design a chip? Announcing the protocol emulator ASIC competition](<https://devfeed.tech/articles/can-you-design-a-chip-announcing-the-protocol-emulator-asic-competition-20207.md>)

Original publisher: [Read original article](<https://blog.janestreet.com/protocol-emulator-asic-competition/>)

Author: Benjamin Devlin

Published: 2026-09-10T00:00:00Z

Content type: release

Language: en

Sources: [Jane Street](<https://devfeed.tech/sources/jane-street.md>)

Topics: [Chip design](<https://devfeed.tech/topics/chip-design.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>), [Hardware](<https://devfeed.tech/topics/hardware.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [Emulator](<https://devfeed.tech/topics/emulator.md>), [cpu](<https://devfeed.tech/topics/cpu.md>), [Reverse Engineering](<https://devfeed.tech/topics/reverse-engineering.md>), [fpga](<https://devfeed.tech/topics/fpga.md>), [Formal methods](<https://devfeed.tech/topics/formal-methods.md>), [Verilog](<https://devfeed.tech/topics/verilog.md>)

Tags: [chip-design](<https://devfeed.tech/tags/chip-design.md>), [cpu](<https://devfeed.tech/tags/cpu.md>), [emulator](<https://devfeed.tech/tags/emulator.md>), [ethernet](<https://devfeed.tech/tags/ethernet.md>), [firmware](<https://devfeed.tech/tags/firmware.md>), [formal-methods](<https://devfeed.tech/tags/formal-methods.md>), [fpga](<https://devfeed.tech/tags/fpga.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [i2c](<https://devfeed.tech/tags/i2c.md>), [jtag](<https://devfeed.tech/tags/jtag.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [peripheral](<https://devfeed.tech/tags/peripheral.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [reverse-engineering](<https://devfeed.tech/tags/reverse-engineering.md>)

### AI overview

Jane Street announces a competition to design an open-source, general-purpose protocol emulator ASIC. The proposed chip would use a small programmable CPU to read and write pins, count cycles, and implement protocols in firmware, with fabrication planned through IHP and Tiny Tapeout.

### Source excerpt

Last month, we asked you to reverse engineer a chip from nothing but its layout and teased a bigger challenge. Results and our favorite writeups are coming soon. In the meantime, here's our next challenge! This time, you're designing the chip, and we'll pay to fabricate our favorite designs! We're particularly interested in projects with unique functionality, as well as those that demonstrate novel approaches to design and verification methodologies!

## Debugging with ESP-IDF VS Code extension: Part 2

DevFeed: [Debugging with ESP-IDF VS Code extension: Part 2](<https://devfeed.tech/articles/debugging-with-esp-idf-vs-code-extension-part-2-13705.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/2025/06/debugging-with-vscode-part-2/>)

Author: John Lee

Published: 2025-06-12T00:00:00Z

Content type: tutorial

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [ESP-IDF](<https://devfeed.tech/topics/esp-idf.md>), [VS Code Extension](<https://devfeed.tech/topics/vscode-extension.md>), [debugging](<https://devfeed.tech/topics/debugging.md>), [Visual Studio Code](<https://devfeed.tech/topics/visual-studio-code.md>), [Espressif](<https://devfeed.tech/topics/espressif.md>), [Embedded Software Dev](<https://devfeed.tech/topics/embedded-software-dev.md>), [ide](<https://devfeed.tech/topics/ide.md>)

Tags: [blog](<https://devfeed.tech/tags/blog.md>), [breakpoint](<https://devfeed.tech/tags/breakpoint.md>), [debugger](<https://devfeed.tech/tags/debugger.md>), [debugging](<https://devfeed.tech/tags/debugging.md>), [esp-idf](<https://devfeed.tech/tags/esp-idf.md>), [esp32-c3](<https://devfeed.tech/tags/esp32-c3.md>), [esp32-s3](<https://devfeed.tech/tags/esp32-s3.md>), [espressif](<https://devfeed.tech/tags/espressif.md>), [extension](<https://devfeed.tech/tags/extension.md>), [gdb](<https://devfeed.tech/tags/gdb.md>), [jtag](<https://devfeed.tech/tags/jtag.md>), [tutorial](<https://devfeed.tech/tags/tutorial.md>), [vs-code](<https://devfeed.tech/tags/vs-code.md>), [vscode](<https://devfeed.tech/tags/vscode.md>)

### AI overview

Part two of a guide to debugging Espressif firmware in VS Code with the ESP-IDF extension. It covers launching a debugging session, setting breakpoints, navigating through code, and inspecting variables using gdb and JTAG.

### Source excerpt

This two-part guide shows how to set up VS Code with the ESP-IDF extension to debug Espressif boards using JTAG. In this second part, we will debug a simple project using gdb through Espressif's VSCode extension. We will explore the debugging options for navigating the code and inspecting the variables.

## Debugging with ESP-IDF VS Code extension: Part 1

DevFeed: [Debugging with ESP-IDF VS Code extension: Part 1](<https://devfeed.tech/articles/debugging-with-esp-idf-vs-code-extension-part-1-13699.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/2025/05/debugging-with-vscode/>)

Author: John Lee

Published: 2025-05-20T00:00:00Z

Content type: tutorial

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [debugging](<https://devfeed.tech/topics/debugging.md>), [VS Code Extension](<https://devfeed.tech/topics/vscode-extension.md>), [ESP-IDF](<https://devfeed.tech/topics/esp-idf.md>), [Espressif](<https://devfeed.tech/topics/espressif.md>), [Hardware](<https://devfeed.tech/topics/hardware.md>), [Embedded Systems](<https://devfeed.tech/topics/embedded-systems.md>), [ESP32](<https://devfeed.tech/topics/esp32.md>), [ESP32-C3](<https://devfeed.tech/topics/esp32-c3.md>), [ESP32-C6](<https://devfeed.tech/topics/esp32-c6.md>), [ESP32-S3](<https://devfeed.tech/topics/esp32-s3.md>)

Tags: [blog](<https://devfeed.tech/tags/blog.md>), [debugging](<https://devfeed.tech/tags/debugging.md>), [embedded-systems](<https://devfeed.tech/tags/embedded-systems.md>), [esp-idf](<https://devfeed.tech/tags/esp-idf.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [esp32-c3](<https://devfeed.tech/tags/esp32-c3.md>), [esp32-c6](<https://devfeed.tech/tags/esp32-c6.md>), [esp32-s3](<https://devfeed.tech/tags/esp32-s3.md>), [espressif](<https://devfeed.tech/tags/espressif.md>), [guide](<https://devfeed.tech/tags/guide.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [jtag](<https://devfeed.tech/tags/jtag.md>), [vs-code](<https://devfeed.tech/tags/vs-code.md>)

### AI overview

This first part of a two-part guide explains how to set up debugging for Espressif devices in Visual Studio Code with the ESP-IDF Extension. It covers debugging concepts, required hardware, JTAG and USB connection paths, the associated tools, and starting the openOCD server.

### Source excerpt

This two-part guide shows how to set up VS Code with the ESP-IDF extension to debug Espressif boards using JTAG. This first part covers the debugging process, hardware setup and connections, and starting the openOCD server.

## Introduction to Zephyr OS Tracing and Profiling

DevFeed: [Introduction to Zephyr OS Tracing and Profiling](<https://devfeed.tech/articles/introduction-to-zephyr-os-tracing-and-profiling-13672.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/2024/11/zephyr-tracing-and-profiling/>)

Author: John Lee

Published: 2024-11-15T00:00:00Z

Content type: tutorial

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [Zephyr RTOS](<https://devfeed.tech/topics/zephyr-rtos.md>), [Embedded Software Dev](<https://devfeed.tech/topics/embedded-software-dev.md>), [tracing](<https://devfeed.tech/topics/tracing.md>), [Embedded Systems](<https://devfeed.tech/topics/embedded-systems.md>), [debugging](<https://devfeed.tech/topics/debugging.md>), [ESP32](<https://devfeed.tech/topics/esp32.md>)

Tags: [architecture](<https://devfeed.tech/tags/architecture.md>), [blog](<https://devfeed.tech/tags/blog.md>), [cpu](<https://devfeed.tech/tags/cpu.md>), [debugging](<https://devfeed.tech/tags/debugging.md>), [embedded](<https://devfeed.tech/tags/embedded.md>), [embedded-systems](<https://devfeed.tech/tags/embedded-systems.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [esp32-c6](<https://devfeed.tech/tags/esp32-c6.md>), [introduction](<https://devfeed.tech/tags/introduction.md>), [jtag](<https://devfeed.tech/tags/jtag.md>), [logging](<https://devfeed.tech/tags/logging.md>), [performance](<https://devfeed.tech/tags/performance.md>), [profiling](<https://devfeed.tech/tags/profiling.md>), [python](<https://devfeed.tech/tags/python.md>), [techniques](<https://devfeed.tech/tags/techniques.md>), [threads](<https://devfeed.tech/tags/threads.md>), [tracing](<https://devfeed.tech/tags/tracing.md>), [usb](<https://devfeed.tech/tags/usb.md>), [zephyr](<https://devfeed.tech/tags/zephyr.md>), [zephyr-os](<https://devfeed.tech/tags/zephyr-os.md>)

### AI overview

This article introduces tracing and profiling for embedded systems using Zephyr RTOS. It explains how tracing records execution data from functions, threads, and interrupts, while profiling measures metrics such as execution time, CPU usage, and dynamic memory usage. It also demonstrates Zephyr's native tracing workflow on an ESP32-C6 and introduces Percepio's Tracealyzer as a third-party analysis tool.

### Source excerpt

This is an introduction to the critical embedded system debugging techniques of tracing and profiling within the Zephyr RTOS. After reading this article, you can use Zephyr's native tracing tools to gain a visual, in-depth understanding of system dynamics, helping to evaluate performance, spot timing issues, and diagnose complex problems like memory leaks or thread interaction glitches.

## ESP USB Bridge

DevFeed: [ESP USB Bridge](<https://devfeed.tech/articles/esp-usb-bridge-13850.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/esp-usb-bridge/>)

Author: John Lee

Published: 2022-04-13T00:00:00Z

Content type: article

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [USB](<https://devfeed.tech/topics/usb.md>), [ESP-IDF](<https://devfeed.tech/topics/esp-idf.md>), [Esp32 S2](<https://devfeed.tech/topics/esp32-s2.md>), [Microcontroller](<https://devfeed.tech/topics/microcontroller.md>), [ESP32-S3](<https://devfeed.tech/topics/esp32-s3.md>), [Espressif](<https://devfeed.tech/topics/espressif.md>)

Tags: [apache](<https://devfeed.tech/tags/apache.md>), [blog](<https://devfeed.tech/tags/blog.md>), [bridge](<https://devfeed.tech/tags/bridge.md>), [esp-idf](<https://devfeed.tech/tags/esp-idf.md>), [esp32-s2](<https://devfeed.tech/tags/esp32-s2.md>), [esp32-s3](<https://devfeed.tech/tags/esp32-s3.md>), [espressif](<https://devfeed.tech/tags/espressif.md>), [flashing](<https://devfeed.tech/tags/flashing.md>), [jtag](<https://devfeed.tech/tags/jtag.md>), [microcontrollers](<https://devfeed.tech/tags/microcontrollers.md>), [usb](<https://devfeed.tech/tags/usb.md>)

### AI overview

ESP USB Bridge is an ESP-IDF project for ESP32-S2, optionally ESP32-S3, that bridges a computer with a target microcontroller. It provides serial, JTAG, and USB mass-storage functions, including UF2-based flashing.

### Source excerpt

The ESP USB Bridge is an ESP-IDF project utilizing an ESP32-S2 (or optionally, an ESP32-S3) chip to create a bridge between a computer and a target microcontroller. It can serve as a replacement for USB-to-UART chips (e.g. CP210x). ESP USB Bridge creates a composite USB device accessible from the computer when they are connected through a USB cable. The main features are the following.

## Presenting the Advantages of ESP32-S3-BOX, Espressif's AI Voice Development Kit

DevFeed: [Presenting the Advantages of ESP32-S3-BOX, Espressif's AI Voice Development Kit](<https://devfeed.tech/articles/presenting-the-advantages-of-esp32-s3-box-espressif-s-ai-voice-development-kit-13943.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/presenting-the-advantages-of-esp32-s3-box-espressifs-ai-voice-development-kit/>)

Author: John Lee

Published: 2021-11-22T00:00:00Z

Content type: article

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [ESP32-S3](<https://devfeed.tech/topics/esp32-s3.md>), [ESP32](<https://devfeed.tech/topics/esp32.md>), [Espressif](<https://devfeed.tech/topics/espressif.md>), [Internet of things](<https://devfeed.tech/topics/iot.md>), [Bluetooth](<https://devfeed.tech/topics/bluetooth.md>), [Wi-Fi](<https://devfeed.tech/topics/wi-fi.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [SOC](<https://devfeed.tech/topics/soc.md>)

Tags: [ai-voice-assistant](<https://devfeed.tech/tags/ai-voice-assistant.md>), [aiot](<https://devfeed.tech/tags/aiot.md>), [applications](<https://devfeed.tech/tags/applications.md>), [blog](<https://devfeed.tech/tags/blog.md>), [bluetooth](<https://devfeed.tech/tags/bluetooth.md>), [development-kit](<https://devfeed.tech/tags/development-kit.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [esp32-s3](<https://devfeed.tech/tags/esp32-s3.md>), [espressif](<https://devfeed.tech/tags/espressif.md>), [follow](<https://devfeed.tech/tags/follow.md>), [hmi](<https://devfeed.tech/tags/hmi.md>), [iot](<https://devfeed.tech/tags/iot.md>), [jtag](<https://devfeed.tech/tags/jtag.md>), [offline](<https://devfeed.tech/tags/offline.md>), [sign-in](<https://devfeed.tech/tags/sign-in.md>), [sign-up](<https://devfeed.tech/tags/sign-up.md>), [soc](<https://devfeed.tech/tags/soc.md>), [speakers](<https://devfeed.tech/tags/speakers.md>), [usb](<https://devfeed.tech/tags/usb.md>), [voice](<https://devfeed.tech/tags/voice.md>), [wi-fi](<https://devfeed.tech/tags/wi-fi.md>)

### AI overview

Espressif's ESP32-S3-BOX is an AI voice development kit based on the ESP32-S3 Wi-Fi and Bluetooth 5 SoC. The article presents its hardware specifications and supported use cases, including online and offline voice assistants, AIoT devices, machine learning at the edge, and HMI applications.

### Source excerpt

Espressif Systems has recently released an AI voice development kit dubbed ESP32-S3-BOX, based on ESP32-S3 Wi-Fi + Bluetooth 5 (LE) SoC. It provides a platform for developing the control of smart devices with offline and online voice assistants. ESP32-S3-BOX is ideal for developing AIoT applications with reconfigurable AI voice functions, such as smart speakers, and IoT devices that achieve human-computer voice interaction directly.

## Debugging Targets of idf.py

DevFeed: [Debugging Targets of idf.py](<https://devfeed.tech/articles/debugging-targets-of-idf-py-13828.md>)

Original publisher: [Read original article](<https://developer.espressif.com/blog/debugging-targets-of-idf.py/>)

Author: John Lee

Published: 2020-06-24T00:00:00Z

Content type: tutorial

Language: en

Sources: [Blog on Developer Portal](<https://devfeed.tech/sources/blog-on-developer-portal.md>)

Topics: [debugging](<https://devfeed.tech/topics/debugging.md>), [ESP-IDF](<https://devfeed.tech/topics/esp-idf.md>), [Command-line interface](<https://devfeed.tech/topics/cli.md>), [ESP32](<https://devfeed.tech/topics/esp32.md>), [Tooling](<https://devfeed.tech/topics/tooling.md>)

Tags: [blog](<https://devfeed.tech/tags/blog.md>), [command-line](<https://devfeed.tech/tags/command-line.md>), [debugger](<https://devfeed.tech/tags/debugger.md>), [debugging](<https://devfeed.tech/tags/debugging.md>), [embedded](<https://devfeed.tech/tags/embedded.md>), [esp-idf](<https://devfeed.tech/tags/esp-idf.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [gdb](<https://devfeed.tech/tags/gdb.md>), [gpio](<https://devfeed.tech/tags/gpio.md>), [ide](<https://devfeed.tech/tags/ide.md>), [idf-py](<https://devfeed.tech/tags/idf-py.md>), [iot](<https://devfeed.tech/tags/iot.md>), [jtag](<https://devfeed.tech/tags/jtag.md>), [monitor](<https://devfeed.tech/tags/monitor.md>), [programming](<https://devfeed.tech/tags/programming.md>)

### AI overview

This article explains how to use the debugging targets added to idf.py in ESP-IDF v4.2. It covers command-line workflows for OpenOCD, GDB, GDB TUI, IDF Monitor, and the gdbgui debug server, including JTAG requirements and configuration overrides.

### Source excerpt

This article outlines a quick and easy way to start a debugger from the command line. More specifically, it discusses the debugging targets of idf.py, which have been added to ESP-IDF from v4.2. At the time of writing, IDF v4.2 is not released yet, but you can try out this feature on the master branch. Why Do We (Not) Debug# Debugging is an essential development technique, no less so for embedded platform engineers.