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SEGGER J-Link EDU Mini V2（ada3571）
【Revision History】改版紀錄：
- As of March 11, 2025 - this now comes in plastic housing and has USB Type C instead of Micro B. The target interface cable is now both .05″ 19‑pin and .05″ 9-pins. Also no longer includes a USB cable.／它現在採用塑膠外殼，並且具有 USB Type C 而不是 Micro B。目標接口電纜現在為 19Pin 和 9Pin。也不再包含 USB 連接線。
- As of August 23, 2018 this item now includes a 10-pin SWD ribbon cable.
- As of August 31, 2018 this item has a USB Micro-B input instead of USB-A and comes with a USB-A to USB Micro-B cable.
〔Technical Details〕規格：
J-Link EDU Mini is delivered with the following components：
- J-Link EDU Mini with standard 10-pin 0.05" male connector (compatible to J-Link)
- combo .05″ 19‑pin and .05″ 9-pin target interface cable
- Debugger weight： 7.4g
- Debugger dimensions： 63.5 x 63.5 x 19mm
Doing some serious development on any ARM-based platform, and tired of 'printf' plus an LED to debug? A proper JTAG/SWD HW debugger can make debugging more of a pleasure and less of a pain. It allows you to program your devices at the click of a button, read or write memory addresses or registers on a live system, temporarily halt program execution at a given location or condition, and much more. Essentially, it's a direct window into what's going on inside your MCU at any given moment, giving you a level of access and control that's not easy to replicate with other debugging methods.
The J-LINK EDU Mini is a version of the J-Link EDU in a reduced form factor (18mm x 50mm – like a USB stick!) with identical functionality for Cortex-M based targets. We really love J-Links for programming our Cortex chips, they're durable and support every microcontroller we've bumped into. They're also often supported within the IDE's for chips for native debugging (e.g. Atmel Studio for when we're doing our ATSAMD development). The new Mini is bare-bones and very affordable! It is designed to allow students and educational facilities as well as hobbyists access to top of the line debug probe technology. It can do just about everything the 'big sister' J-Link EDU can do：
- Unlimited Breakpoints - The unlimited breakpoints in flash memory feature can be used free of charge for evaluation. The evaluation period is not time limited. For commercial use a separate license is required.
- Free Software Updates - As a legitimate owner of a SEGGER J-Link, you can always download the latest software free of charge. Though not planned and not likely, we reserve the right to change this policy. Note that older models may not be supported by newer versions of the software. Typically, we support older models with new software at least 3 years after end of life.
- Supports concurrent access to CPU by multiple applications - J-Link allows multiple applications to access a CPU at the same time. This has numerous applications. J-Link commander can be used in parallel to a debugger, a tool to communicate via DCC can be used in parallel to a debugger or a visualization tool such as Micrium's u/C-Probe or SEGGER's kernel viewer embOSView.
- Cross-platform support - Runs on Windows, Linux, Mac OS X. The MAC and Linux versions are fully usable, but limited to the following components： J-Link Commander, command line GDBServer, shared library (DLL-equivalent)
- Licensing and Support : J-Link EDU Mini may only be used for non-commercial purposes. J-Link EDU Mini does not include support. (However you may submit your question to the SEGGER Forum)
- You may use the J-Link EDU for non profit educational purposes only! Non-profit educational purposes means that you may not use the J-Link EDU and its J-Link software.
- direct or indirect in or for a profit organization or business purposes or other undertaking intended for profit
- direct or indirect in any other commercial environment (e.g. office)
- To develop, debug, program or manufacturer a commercial product (or parts thereof)
- To use it to either earn money or reasonably anticipate the receipt of monetary gain from it.
What does this mean? Basically, if you're making money (or plan to make money) off your project, you'll need to order the full commercial version, or find a different debugger that suits your needs and budget better. But if you're working on personal, non-commercial projects, such as publishing some open source designs you're not selling yourself, you're good. You don't need to be a student, and you can even be a paid engineer during the week, using this on the weekend for personal non-commercial projects. As long are your intentions are non-commercial, the J-Link EDU is an excellent choice!
If you're going to use your debugger strictly for education or personal, non-commercial projects, such as publishing open source designs that you're not selling, then you should get this EDU Mini (or the standard EDU) version!
We do have the commercial version of the J-Link – please support SEGGER's quality engineering and respect their generosity by purchasing the professional/commercial version of the J-Link; it's still a great deal!
This kit comes with a combo .05″ 19‑pin and .05″ 9-pin target interface cable.
More about why we like J-Link!
Of the dozens (and dozens!) of debuggers out there (we have literally drawers full of them!), we chose the J-Link for a number of reasons:
- It's USB-based and uses a high-speed MCU internally, not an FTDI converter like most low-cost debuggers. More debugging, less waiting!
- It's toolchain, IDE, and vendor neutral, so you only need to buy one tool for all of your ARM needs and be done with it forever:
- Support GDB-based debugging and flash programming on Linux, Windows, and the Mac via the free GDB Server
- 支援大多數主要 IDE，包括 Keil、IAR Atmel Studio、Crossworks for ARM
- 它包括適用於大多數 MCU 的快閃記憶體編程演算法，並且 Segger 非常積極地更新其驅動程式以支援最新的晶片組。
- 它只是有效，並且會繼續有效，並且會在幾年後為您服務。
J-Link 速度很快。單步執行斷點和讀取記憶體位址非常快速，對晶片上的快閃記憶體進行編程也是如此。不過，它真正的優勢在於它對供應商和工具都是中立的。如今，大多數晶片供應商都提供低成本（或免費）的工具，但他們也會將您鎖定在他們的晶片中，並迫使您接受他們為您做出的選擇。Segger 的 J-Link 在這方面是一個很好的改變，因為您可以合理地確定它可以與任何芯片、任何主要工具鏈一起使用，並且您可以自由更改陣營（或操作系統或 IDE），而無需每次都購買新的調試器。
【 我為什麼要這個？】
您可以只使用 printf 和 LED 進行許多基本偵錯，而且您可能不需要硬體偵錯器即可開始，但一旦您開始處理更複雜的專案，您很快就會遇到偵錯牆。
例如，您的晶片可能最終出現在 HardFault 處理常式中，但如果沒有偵錯工具，可能很難準確追蹤導致問題的原因。偵錯器可讓您在程式碼中設定“斷點”，執行將暫時停止，您可以在該時間點檢查記憶體或週邊設備的值，然後逐行「單步」瀏覽程式碼，執行您的程序，直到找到導致故障的地方。除錯之外，偵錯的意義遠不止簡單的斷點，但您通常可以使用斷點在幾分鐘內解決 printf 和插入程式碼的侵入性封鎖機制所需的更長時間，而無需偵錯器。
無論您使用的是 GDB 伺服器 （GNU 工具） 還是 IDE 和商業工具鏈，這也是一個很大的便利，因為 J-Link 只需按一下按鈕即可為您對快閃記憶體進行編程，重置設備，開始執行，然後在 main（） 上「停止」。您可以自己完成所有這些步驟 - 通過 UART 上的免費工具或通過 USB 引導加載程序等對設備進行編程 - 但是當您需要每天執行 40-50 次時，它很快就會變舊，節省的 15 秒在調試時會產生巨大的差異。您可以對一個小型 MCU 進行編程，並使用 J-Link 在 2-3 秒內斷開主電源，這使得工具或多或少不可見，當您有其他問題需要擔心時，這是一件好事。
