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Altera_Forum's avatar
Altera_Forum
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20 years ago

Scrambled stdout?

Using the Nios Evaluation Kit here.

Given the following source 

#include <stdio.h>
int main()
{
        int i;
    for(i=0;i<10;i++)
      printf("Hello From Nios\n\n");
      return 0;
}

I&#39;ve set the jtag uart as my stdout. What I get is the following: 

HHlloo rrmmNNiss
eelooFFoo Niiss
Helll  rrmm iiss
HllooFFrmmNNoos
eell Frrm  iiss
HHlll  rommNNiss
eell Frro  iiss
ello FFoo  iis
eelooFFoo  Noo
HHell  rro  Noos

I&#39;m running this program on the onchip memory. It seems random: the output is different at every run.

Any clue?

3 Replies

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

    hi motumboe,

    1. Try to set the reset address to sram or sdram other than on-chip memory, to see if it can work

    2. run other applications to see if it can work.

    3. examine in SOPC builer, system library in NIOS II IDE to see if anything is wrong with the setting.

    Hope it can help you a bit.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    Solved :-)

    I explain how, for anyone&#39;s benefit who may be having the same problem.

    As you correctly suggested, I checked out the System library in Nios II.

    It turned out that I had no system clock timer or timetamp timer.

    Setting a timer for each of them solved the problem http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/cool.gif
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    Hi motumboe,

    it&#39;s a very strange explanation, because the program you posted, doesn&#39;t use any timing function and you have no operating system that needs a system clock timer. Are u sure u haven&#39;t done other changes? or why does your design need a timer?