Using HAL API usleep function

Question

When I call the usleep function for 3 seconds as follows...

usleep(3000000); /* Sleep for 3.0s. */

I get the following warning from Nios 2 EDS...

"implicit declaration of function `usleep'"

What does this warning mean and will it cause any issues??

Thanx for help,

Chase

altera_forum · Answer

Have you included unistd.h in your source file?

altera_forum · Answer

That would be the issue. Thanks Kevin !

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