S32 Design StudioのトピックRe: time

time

vladstoica — Wed, 22 Jun 2016 08:15:03 GMT

Hello,

How can I use time.h functions in S32 design studio? I tried clock() and also time() functions, but none of them works.

Thanks,

Vlad

Re: time

martin_kovar — Wed, 22 Jun 2016 08:19:47 GMT

Hi Vlad,

please look at the following thread. We have already solve this problem, so I hope it will help you. If not, please write me back.

https://community.nxp.com/message/640746#comment-640746

Regards,

Martin

Re: time

vladstoica — Wed, 22 Jun 2016 09:07:10 GMT

Hello,

It doesn't work. I am using also newlib, but with or without the two ewl libraries, time() function always returns -1 (error code).

Vlad

Re: time

vladstoica — Thu, 23 Jun 2016 06:43:10 GMT

Hello,

Can you send me a configured project that contains time() or clock() function? I looket at that thread,but it didn't work.

Thanks,

Vlad

Re: time

martin_kovar — Thu, 23 Jun 2016 07:10:57 GMT

Hi Vlad,

sorry for my previous post. Return code -1 is correct, because the micro does not have any resources, how to return you correct time.

This is the clock function description:

This function returns the calling process' current CPU time. If the CPU time is not available or cannot be represented, clock returns the value (clock_t)(-1).

and this is the time function description:

The time function returns the current calendar time as a value of type time_t. If the argument result is not a null pointer, the calendar time value is also stored in *result. If the current calendar time is not available, the value (time_t)(-1) is returned.

So you cannot simply use these functions. The way, how to use these functions exists, but it will be pretty difficult and I do not have any experience with it. Please look at the follow URL:

http://stackoverflow.com/questions/15030123/how-does-the-clock-function-in-ctime-access-the-system-clock

Regards,

Martin