SoC Cyclone V : configure FPGA fabric from jtag_uart ?

[WabG]

Dear support,

On a Cyclone V SoC, is it possible to acces the JTAG TAP from Linux through the jtag_uart core ?

The final goal is to reconfigure the FPGA fabric through JTAG.

Regards,

WabG

[aikeu]

Hi WabG,

Do you mean programming the FPGA fabric with Jtag?

By default all devices able to program the FPGA fabric through Jtag.

Thanks.

Regards,

Aik Eu

[WabG]

Aik Eu,

Yes I mean programming through JTAG but from the HPS using the JTAG_UART module instantiated in the SoC.

Regards,

WabG

[aikeu]

Hi WabG,

Do you mean programming the QSPI flash from the FPGA side using the normal Jtag module? Is your board a custom board and different from the development kit?

Normal booting up from QSPI flash will follow the below, do let me know if there any difference on your case:

https://www.rocketboards.org/foswiki/Documentation/BuildingBootloaderCycloneVAndArria10

Thanks.

Regards,

Aik Eu

[aikeu]

Hi WabG,

May I know any follow up from the previous comments?

Thanks.

Regards,

Aik Eu

[WabG]

Aik Eu,

> Do you mean programming the QSPI flash from the FPGA side using the normal Jtag module? Is your board a custom board and different from the development kit?

We have a custom board and we can't access the JTAG connector so the question is about accessing the JTAG TAP using the JTAG_UART as a bridge + configuring the Scan Manager to switch to the internal JTAG chain instead of the external pins.

Is my question clear ?

Regards,

WabG

[aikeu]

Hi WabG,

Sorry for the late reply, I think you are referring to this:

https://www.intel.com/content/www/us/en/docs/programmable/683126/21-2/communicating-with-the-jtag-tap-controller.html

Thanks.

Regards,

Aik Eu

[aikeu]

Hi WabG,

I will close the thread if no further question.

Thanks.

Regards,

Aik Eu

[aikeu]

Hi WabG,

As we do not receive any response from you on the previous question/reply/answer that we have provided. Please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.

Thanks.

Regards,

Aik Eu