但我建议不要用！：
ST-LINK也是用的SWD方式，可选4MHz，关键替换后估计不稳定，为什么要替换？！
更重要的是，刷成jlink后一堆限制，建议不要刷了：
Limitations
The firmware making the ST-LINK on-board J-Link compatible has some limitations in contrast to an original, industry leading SEGGER J-Link:
1.May be used with ARM based ST devices only
2.Only debugging on evaluation boards is allowed. Debugging on custom hardware is not supported and not allowed
3.No production flash programming support
4.Unlimited breakpoints in flash available for evaluation only
5.No support is given
参考： http://www.segger.com/jlink-st-link.html
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早前有人发过此类应用：
https://www.stmcu.org.cn/module/ ... =page%3D&page=1
但我建议不要用！：
ST-LINK也是用的SWD方式，可选4MHz，关键替换后估计不稳定，为什么要替换？！
更重要的是，刷成jlink后一堆限制，建议不要刷了：
Limitations
The firmware making the ST-LINK on-board J-Link compatible has some limitations in contrast to an original, industry leading SEGGER J-Link:
1.May be used with ARM based ST devices only
2.Only debugging on evaluation boards is allowed. Debugging on custom hardware is not supported and not allowed
3.No production flash programming support
4.Unlimited breakpoints in flash available for evaluation only
5.No support is given
参考：
http://www.segger.com/jlink-st-link.html
,强烈支持楼主ing……