Re: [avr-libc-dev] Missing time.h posix

[Daniele Basile]

Weddington, Eric ha scritto:
>  
>
> > -----Original Message-----
> > From: 
> > address@hidden 
> > [mailto:address@hidden
> > org] On Behalf Of Daniele Basile
> > Sent: Friday, October 09, 2009 6:10 PM
> > To: address@hidden
> > Subject: [avr-libc-dev] Missing time.h posix 
> >
> > Hello,
> > we need to use some functions of posix standard time library. 
> > We want to use 
> > some time functions that convert unix time to a tm structure, 
> > or vice versa, 
> > (ie, mktime, gmtime..), but the avr libc doesn't include them.
> > Do you plan to include time.h in avr libc in future? if not, 
> > how do we 
> > contribute to avr libc?
>
> Hi Daniele,
>
> I believe I know some other people over at Develer. ;-) You can contribute like 
> any other open source project: just submit a patch. Please submit patches to 
> the Patch Tracker on the avr-libc project on Savannah.
>
> We have had people ask about time.h in the past. The problem with it is that 
> there is no common hardware standard on the AVR for timekeeping. So our 
> standard answer has always been that we can't generally support time.h because 
> there's no common way to do this for all AVR projects. However we're always 
> open to new ideas and if you have a proposal then let's please discuss.
We know this problem and we think that is not simple to solve. However some time 
functions makes only conversion operation, like mktime or gmtime, so we could 
choose one subset of time functions that can work on every avr. We think this is 
enough for all commons operation that need to manipulate time/date data. For 
example we want to store time stamp that we had read from gps receiver and then 
print its string representation; to do this we want to convert time stamp to 
unix time and then use asctime to print it.

Let me know what you think.

Regards,
Daniele.


--
|  [D]-o Ing. Daniele Basile - address@hidden
|   ||}-o  Develer S.r.l., R&D dept.
|  [B]-o  http://www.develer.com/