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Benitez__Domingo's avatar
Benitez__Domingo
Icon for Occasional Contributor rankOccasional Contributor
1 year ago
Solved

Issue after upgrading a Nios V/g core from version 1.0.0 to 4.0.0

Hi, I have developed a Quartus project based on the Nios V/g processor for the Terasic DE0-Nano board using Quartus Prime Standard Edition 23.1. The board is connected to a PC via the USB interface....
Embedded Applications Layer
Nios Cpu
  • Benitez__Domingo's avatar
    Benitez__Domingo
    1 year ago

    Hi,

    Thank you very much for your suggestions. I checked them all, but I was not successful.

    However, this issue could be fixed as follows.

    The "Branch Prediction" option of the Nios V/g 4.0.0 IP was enabled (24.1std).

    This option is unavailable for the Nios V/g 1.0.0 IP (23.1std).

    I used the software debugger (OpenOCD and riscv32-unknown-elf-gdb) and noted that branches were never taken.

    My program has some branches that are taken and output messages on the display.

    After unchecking the "Branch Prediction" checkbox, the issue was solved, and the program ran correctly.

    Perhaps the issue lies in the branch prediction module of the Nios V/g 4.0.0 IP.

    Regards.
    Domingo.

BoonBengT_Altera's avatar
BoonBengT_Altera
Icon for Moderator rankModerator
1 year ago

Hi @Benitez__Domingo,


Greetings, as solution has been marked and with no further clarification/updates on the matter, hence would assume challenge are overcome


Please login to ‘ https://supporttickets.intel.com/s/?language=en_US’, 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. For new queries, please feel free to open a new thread and we will be right with you. Pleasure having you here.


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