Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Problem with Target connection

Hi,

I build my own component in SOPC Builder. It gets added into the component list . Everything seems to be working fine. But, when I am trying to run simple hello_world template, it is giving error in target connection.

I tried downloading .sof file. It shows progress as 100%. But while running the project it gives error:

[Target Connection]: no Nios II path were located. Check connections and that a Nios II .sof file is downloaded.

Thanks,

Mumble.

11 Replies

Show More
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    Hello,

    I postet a request in another thread, but it fits here as well:

    http://alteraforums.net/forum/showthread.php?t=24758

    the system works well with one custom sopc module added to the system, but with an other one the system id and time stamp cannot be read from the board (de2-115 or de3 => it's not caused by the board but by the software/hdl-design).

    the custom sopc module of course compiles correctly. but it is very large in size (2.500 lines of verilog code).

    is there maybe a practical limitation of logic size due to delay times? (i don't really belief that...)

    and why does the nios processor not respond anymore, even if the module isn't working correctly?

    => how can a faulty memory mapped slave module affect the processor? the mm-interface itself cannot be wrong because it is simulated, recognised correctly by the sopc builder and used by me in some other working designs "copy-and-paste".

    in the meantime I checked the mm slave interface of the module with the signal tap analyzer and put a counting signal on the read-bus data output: this works.

    The module also has a streaming interface: there is nothing on the bus => OK

    but when I try to read the system ID: the system is reset (counter = 0) and the system ID is not found :cry: