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Altera_Forum
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11 years ago

Modification of HelloWorld-Baremetal-ARMCC Example fails

Hello,

I am trying to run an application on HPS. I looked at the Altera example 'altera-socfpga-helloworld-baremetal-armcc' to start off. I run this application just fine. However when I add an additional line of printf("message"); I do not see this output on the console. Why does this happen? (I do build the project with no errors. Is there something additional I am supposed to do?)

On similar lines, after building the GHRD design, I went through the preloader code using DS-5. What I do not understand is, where does my custom application program code fits into the whole picture. If I want to for example, blink led's using delay (in C), where would I write this line of code?

I''m having a tough time figuring out how GHRD designs can be modified to fit custom designs/application. Any pointers would be of help!

Thank you.

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    --- Quote Start ---

    However when I add an additional line of printf("message"); I do not see this output on the console. Why does this happen?

    --- Quote End ---

    Try add "\n" to end of out string, as this: 

    printf("message\n");

    Line Feed or Carriage Return chars usually must be in output text to see it in console.

    --- Quote Start ---

    If I want to for example, blink led's using delay (in C), where would I write this line of code?

    --- Quote End ---

    Debugger in DS-5 help you find this place -- where LEDs make one blink step, there may insert dummy loop like: 

    for (int loo = 0; loo < 1000*1000; loo++) ;