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

alt_timestamp returns the same value

Hello, I'm trying below:

int main()

{

alt_u32 t1;

alt_u32 t2;

alt_u32 t3;

int ret = alt_timestamp_start();

t1 = alt_timestamp();

usleep(1000000);

t2 = alt_timestamp();

t3 = alt_timestamp_freq();

return 0;

}

ret is 0, t3 is 50000000(the input clock of Interval Timer object),

but t1 and t2 always show 4209704959.

It seems that the Timer is not ticking.

I also tried alt_nticks which always returned 0;

I wonder what might be the problem here.

-Cyclone V Dev Board

-QuartusII 15.0(64bit), Qsys on Win7

-NiosI 15.0 Software Build Tools for Eclipse

Thanks in advance.

4 Replies

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

    could you try to place the usleep with some for loop delay just to isolate this is time stamp feature nor working first?

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

    Thank you pororo,

    I tried below but still not working:

    int main()

    {

    alt_u32 t1;

    alt_u32 t2;

    alt_u32 t3;

    unsigned int i;

    int ret = alt_timestamp_start();

    t1 = alt_timestamp();

    for(i=0; i<0x00ffffff; i++) IORD(ONCHIP_MEMORY2_1_BASE,0);

    t2 = alt_timestamp();

    t3 = alt_timestamp_freq();

    return 0;

    }

    I still get 4209704959 for both t1 and t2.

    I had never faced this problem when I was using

    Cyclone IV Development or Custom boards with

    QuartusII, SOPC Builder & NiosII 11.0sp1.

    I wonder what I am missing..
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    Sorry,

    It seems that my problem was not connecting data_master of NiosII and slave of Interval Timer in Qsys.

    Instead, I was connecting instruction_master.

    Thanks!
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    --- Quote Start ---

    Sorry,

    It seems that my problem was not connecting data_master of NiosII and slave of Interval Timer in Qsys.

    Instead, I was connecting instruction_master.

    Thanks!

    --- Quote End ---

    good to hear that!!!