Kinetis Software Development KitのトピックlwIP sys_now() function bug

lwIP sys_now() function bug

biafra — Fri, 15 Dec 2017 16:19:37 GMT

Hi everyone,

It seems I've found in the sys_now() function of the lwIP library:

u32_t sys_now(void)
{
return xTaskGetTickCount();
}

It returns the number of ticks from startup, not the number of milliseconds!

It should be:

return xTaskGetTickCount() * portTICK_PERIOD_MS;

Many thanks

Biafra

Re: lwIP sys_now() function bug

danielchen — Wed, 20 Dec 2017 08:37:50 GMT

Hi Biafra:

Thanks for your attention.

But it seems the LWIP function documentation says, it returns the current time in milliseconds.

Please refer to the below link

lwIP: Time

Regards

Daniel

Re: lwIP sys_now() function bug

biafra — Wed, 20 Dec 2017 08:54:06 GMT

Hi Daniel,

Thanks for yor answer.

That's why I write my post: at the moment by simply calling the xTaskGetTickCount() function the sys_now() function returns the current time in ticks, not in milliseconds. With the correction I suggested it returns milliseconds.

Many thanks

Biafra

Re: lwIP sys_now() function bug

danielchen — Wed, 20 Dec 2017 09:09:16 GMT

Thanks, Biafra, I will report it to the developers.

Regards

Daniel