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system_printf no output

steven149
Prodigy 135 points

I finally got the DSP/BIOS6 hello example compiled and linked without errors and got a .out file. Following the "Running and Debugging an Application" in this link:

http://rtsc.eclipse.org/docs-tip/RTSC%2BCCStudio_v4_QuickStart

I can't see the System_printf("hello world\n") in the Console. Since I don't have any hardware board, so I tried to use TI's simulator to create an Target Configuration file and in the common.cfg file added System module. But the Run icon either gray out or says "Invalid file format".

Is there anything else I have missed?

Thanks.

  • 0
    Prodigy 135 points

    Just a follow up to my previous question while reading:

    Do I need a Target even though I am just using System_printf()?

  • 0 in reply to steven149
    Intellectual 350 points

    oops, wrong button (I hit suggest an answer)

    I was able to get output (both on an eval board over USB/JTAG and with the simulator) by using printf() and  #include <stdio.h>

    System_printf() has never generated output for me either...

  • 0 in reply to dkerns
    Guru 10385 points

    Me too. The printf's work, but the System_printf's dont.

    Could it be that the compiler sees a printf in the code and that mucks up the System_printf?

    Cheers

  • 0 in reply to Eddie3909
    TI__Expert 4125 points

    Depending on which version of SYS/BIOS you are using, you may not see the System_printf's come out on the console due to how System is configured. If you want to have System_printf output go to the same place as printf, add the following three lines to your .cfg file and re-build:

    var System = xdc.useModule('xdc.runtime.System');
    var SysStd = xdc.useModule('xdc.runtime.SysStd');
    System.SupportProxy = SysStd;

    If you don't do this, the output will go to a circular buffer in memory. You can examine that buffer using the ROV tool (use the menu: Tools->ROV while in the debugger).

    Mark

  • 0 in reply to MarkGrosen
    Guru 10385 points

    Hi Mark

    That got it working. Thanks

    I could not find the buffer you mentioned. Is it Tools->ROV->xdc->runtime->System?

    Cheers

  • 0 in reply to Eddie3909
    TI__Expert 3745 points

    For future reference: it's under SysStd (or SysMin if configured) - click on the OutputBuffer tab

  • 0 in reply to BrianC
    Expert 1630 points

    BrianC said:

    For future reference: it's under SysStd (or SysMin if configured) - click on the OutputBuffer tab

    All,

    After having similar issues (not seeing the System_printf() outputs), and having followed the advice of this thread, I came across an eclipse website that answers this question with more detail.

    Just wanted to share for the benefit of new SYS/BIOS users like myself.

  • 0 in reply to Chris Jagielski
    Prodigy 120 points

    Hi, Chris:

        I ran into the same problem too . I add System_printf() in main(), and I got nothing in console window..

    so I add some codes as suggested but I still got noting in console window...

    So do you know why?

    Thanks a lot..                         yuankui

    var System = xdc.useModule("xdc.runtime.System");
var SysMin = xdc.useModule("xdc.runtime.SysMin");
SysMin.bufSize = 0;
SysMin.flushAtExit = false;
System.SupportProxy = SysMin; /* not really necessary since SysMin is the default */
  • 0 in reply to yuankui xue
    Expert 1630 points

    Hi!

    I would suggest making some changes to your code to see if they help:

    1. SysMin.bufSize = 0x1000;
    2. SysMin.flushAtExit = true;

    For #1, see the details here:   http://rtsc.eclipse.org/cdoc-tip/xdc/runtime/SysMin.html#buf.Size

    Changing #1 to some number >0 will create a buffer for the System Printf's.  You can try changing this number... as you have more System_Printf statements, the buffer will need to be larger to accommodate all of the data.

    For #2, see the details here:   http://rtsc.eclipse.org/cdoc-tip/xdc/runtime/SysMin.html#flush.At.Exit

    Also for #2, note that it only works if the program Exits or Aborts.  This performs a similar action as using System_flush() anytime during runtime in the source file  ... http://rtsc.eclipse.org/cdoc-tip/xdc/runtime/System.html#flush

     

    Lastly, remember that System_printf() does not support the full range of format strings as the standard C printf().  See details here:  http://rtsc.eclipse.org/cdoc-tip/xdc/runtime/System.html#printf

  • 0 in reply to Chris Jagielski
    Prodigy 120 points

    Hi,Chris

         I got it work, thanks for your advice. And the links are very helpful...

         Best wishes..

  • 0 in reply to MarkGrosen
    Prodigy 200 points

    where do you mean ".cfg file"? Is it there?

  • 0
    Prodigy 200 points
    hi
    I have added

    var System = xdc.useModule("xdc.runtime.System");
    var SysMin = xdc.useModule("xdc.runtime.SysMin");
    SysMin.bufSize = 0x1000;
    SysMin.flushAtExit = true;
    System.SupportProxy = SysCallback;

    in cfg and still saw on thing in console.