STLinkV2

# Introduction

* **Original project portal**

>> Original A-port version: [Homemade ST-LINK V2-1 (available for personal testing) - Jialichuang EDA open source hardware platform (oshwhub.com)](https:// oshwhub.com/CYIIOT/ST_LINK-V2_1#P4)
>> Improved C port version: [Type-C_ST-LINK V2-1 - Jialichuang EDA open source hardware platform (oshwhub.com)](https://oshwhub.com /CYIIOT/LOw6HH804VYwwzjE7fS1yQllzyMIY3B7)

## 1. Features

are based on [Improved C-port version] for device modification and re-layout

## 2. Firmware burning

uses JLink for burning

## 3. EDA tool

uses Lichuang EDA Professional Edition for drawing

## 4. LDO modification

Since I have an LDO [LP2992IM5-3.3/NOPB] on hand, I replaced the original RT9013-33GB with LP2992IM5-3.3/NOPB.
The two LDO packages are the same. RT9013 is cheaper, so just choose RT9013
! [image.png] So when using RT9013-3.3, C5 in the picture below can be soldered empty
! [image.png]
## 5. Crystal oscillator Modify

the original crystal oscillator [material number] C111120 and replace it with the existing crystal oscillator on hand [material number] 】C252310, the existing crystal oscillator on hand is too large, so the layout has been greatly changed
! [image.png]
## 6. Layout and routing.

The original routing is basically 5mil or 6mil. This project will widen the routing to 10mil

* Layout

![image.png] **Original trace**
![image.png]
* **Wide trace**

![image.png]
## 7. Firmware burning

* Firmware

>> V2.J28.M18 [https://oshwhub.com/attachments/2020/7/qnbaX4ArFPq1kC6rNr5PCqaKPr6XdvfX27ZRGpFn.zip?operation=downlo ad](https://oshwhub.com/attachments/2020/7/qnbaX4ArFPq1kC6rNr5PCqaKPr6XdvfX27ZRGpFn.zip?operation=down load)

* Firmware update tool

>> STLink Utility [https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/stsw-link004.html ](https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/stsw-link004.html)

* Steps

a) Burning firmware
>> JFlash burning tutorial [J-flash’s simple usage tutorial_boiling cabbage blog-CSDN blog](https://blog.csdn.net/weixin_50903661/article/details/124725521)
>> JFlash project: See the attachment, named JFlash-STM32F103CBT6.jflash.
Use the JFlash tool under JLink to open the attached project for burning. The completion of burning can be verified in keil
! [image.png] **! ! ! ! ! ! ! ! Note: Do not use Kei to update firmware. I always get STLink Connection Error or No Target Connect after updating firmware with keil**
b) To upgrade the firmware
, find ST-LinkUpgrade under the STLink Utility tool after installation. This tool will Upgrade the firmware from V2.J28.M18 to V2.J37.M26. This version of the firmware has more functions

* Just upgrade according to the default options

![image.png]
## 8. Effect

file device
![image.png] Serial port
![image.png] Debug port
![image.png] kei view
![image.png]