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ABhuv.1
ABhuv.1
Associate
July 8, 2022
Solved

JTAG Daisy Chain

  • July 8, 2022
  • 3 replies
  • 5508 views

Hello All,

I am in the process of designing a circuit with four microcontrollers in Daisy chain. I would like to program and debug them via one JTAG port, hence will be daisy chaining them.

Which one of the programmers can do this?. I have used ST-Link-V2, but this cannot programm multiple chips in a daisy chain.

This topic has been closed for replies.
Best answer by Peter BENSCH

Welcome, @ABhuv.1​, to the community!

The ST-LINK/V2 is only a simple debugger for SWD (Serial Wire Debugging), for JTAG debugging you need a JTAG debugger, such as the J-LINK. A similar problem has been discussed in the Segger forum, maybe this will help you?

Regards

/Peter

3 replies

Peter BENSCH
Peter BENSCHAnswer
Technical Moderator
July 11, 2022

Welcome, @ABhuv.1​, to the community!

The ST-LINK/V2 is only a simple debugger for SWD (Serial Wire Debugging), for JTAG debugging you need a JTAG debugger, such as the J-LINK. A similar problem has been discussed in the Segger forum, maybe this will help you?

Regards

/Peter

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ABhuv.1
ABhuv.1Author
Associate
July 11, 2022

HI,

To be more specific, is there a programmer available from STM which can program JTAG chains?

Is the J-Link programmer compatible with Atollic Studio? I cant find any definitive Info on this. From the earlier thread, its isnot clear what IDE was used.

With Regards,

Adi

Markus GIRDLAND
Markus GIRDLAND
ST Employee
July 11, 2022

Hello Adi,

Depends what you mean by "From STM", ST-LINK/V2 which is developed by ST can't do it, just as Peter mentioned. However, both STM32CubeIDE and TrueSTUDIO supports J-LINK.

Keep in mind that TrueSTUDIO is deprecated and I would suggest using STM32CubeIDE.

ABhuv.1
ABhuv.1Author
Associate
July 11, 2022

Hi Markus,

Thanks for the confirmation. Ill use the Jlink with STM32CubeIDE

With regards,

Adi

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