Forum Discussion

NIJGNAS's avatar
NIJGNAS
Icon for New Contributor rankNew Contributor
1 month ago

DK-DEV-AGI027-RA: JTAG chain broken after Nios V Hello, FPGA recovery fails

Hello, I am using the following board and host environment: Board: Agilex 7 FPGA I-Series Development Kit, DK-DEV-AGI027-RA Serial number: 8100604 Quartus Prime Pro: 25.3.1 Host OS: Windows 11 ...
Nios Architecture
Nios Cpu
SteveK_Arrow's avatar
SteveK_Arrow
Icon for New Contributor rankNew Contributor
1 month ago

Hi

What happens if you power cycle the board after you get the JTAG chain problem notification? Can you scan the JTAG chain successfully?

  • NIJGNAS's avatar
    NIJGNAS
    Icon for New Contributor rankNew Contributor
    1 month ago

    Hi SteveK_Arrow,

    I tested that. After the JTAG chain problem occurred, I power-cycled the board and tried scanning again.

    Result: no change. JTAG Auto Detect still fails after the power cycle on both:

    • embedded JTAG, and
    • external USB-Blaster II via J10.

     

    The JTAG Chain Debugger continues to show the same behavior (unknown devices, chain problem) as before. 'jtagconfig --debug' shows the same.

    Thanks.

    • SteveK_Arrow's avatar
      SteveK_Arrow
      Icon for New Contributor rankNew Contributor
      1 month ago

      Hi NIJGNAS

      Is the QSPI device flashed with content? What are the MSEL DIP switch SW2[1:4] settings? Are they set to configure using JTAG or Avalon streaming interface x8?

      Thanks

      • NIJGNAS's avatar
        NIJGNAS
        Icon for New Contributor rankNew Contributor
        1 month ago

        Hi,

        Yes, the QSPI is flashed with content. 

        • With SW8.2 = ON (FPGA removed from the JTAG chain), I was able to Program and Verify the factory recovery image AVSTX8.pof into the QSPI successfully. In this mode, the JTAG chain shows only the MAX10 (10M50DAF256) and the QSPI_2Gb device (see attached JTAG chain screenshot).
        • If I try to program without removing the FPGA from the chain (SW8.2 = OFF), the programming fails with:

        Error(209062): Flash Loader IP not loaded on device 2

        Error(209012): Operation failed

        • After successfully programming the QSPI (with SW8.2 = ON), switching SW8.2 back to OFF still does not restore JTAG. Quartus Programmer Auto Detect continues to fail (same behavior on both embedded JTAG and external USB-Blaster II).

         

        Regarding MSEL DIP SW2[1:4]:

        • Only when I initially ran the Nios V Hello flow, SW2[1:4] was [OFF:OFF:OFF:OFF] (JTAG).
        • Since then, SW2[1:4] has been kept at [ON:OFF:OFF:OFF] (AVST x8) and has not been changed.

         

        Thanks.