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CaptainPrice15's avatar
CaptainPrice15
Icon for New Contributor rankNew Contributor
2 years ago
Solved

Problems with the chrono library in NIOS II

Even though the includes in the bsp has the chrono library and #include<chrono> doesn't throw any error, when the library is used, there is always an error For Example, when I use "std::chrono::hig...
Embedded Applications Layer
Nios Cpu
  • aikeu's avatar
    aikeu
    1 year ago

    Hi CaptainPrice15,


    The screenshot is just to show the application is able to run with the chrono library.

    Try to compile/build all even when you see the errors while editing the code.


    Thanks.

    Regards,

    Aik Eu


aikeu's avatar
aikeu
Icon for Regular Contributor rankRegular Contributor
2 years ago

Hi CaptainPrice15,


Just a simply quick check, If you try the below, will there be any error?


#include <iostream>

#include <chrono>

int main ()

{

using namespace std::chrono;

// std::chrono::milliseconds is an

// instantiation of std::chrono::duration:- 1 second

milliseconds mil(1000);

mil = mil*60;


std::cout << "duration (in periods): ";

std::cout << mil.count() << " milliseconds.\n";

return 0;

}


Thanks.

Regards,

Aik Eu


CaptainPrice15's avatar
CaptainPrice15
Icon for New Contributor rankNew Contributor
2 years ago

Hello @aikeu,

Thanks a lot for your reply.

Yes, there will be an error in the code. In the line "using namespace std::chrono;" it says Symbol chrono could not be resolved.

I have checked that the chrono library is present in includes and is under path "Quartus installation path"/nios2eds/bin/gnu/nios2-elf/include/c++/5.3.0

In project properties, under Nios II Application Properties, the user flag -std=c++11 is also specified (as chrono library requires atleast C++11) and ofcourse the BSP project is linked as well.

Best Regards