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

[Daniele Basile]

Bob Paddock ha scritto:
> On Fri, Oct 9, 2009 at 8:39 AM, Daniele Basile <address@hidden> wrote:
>
>> 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.
>
> What is your goal by using these time functions?
>

Our scope is simple, for example I have this nmea sentence:

$GPRMC,143811.000,A,4351.0794,N,01108.8684,E,0.00,,021009,,,A*77\r\n

where "143811.000" is time stamp in format hhmmss.sss and "021009" date stamp in 
format ddmmyy, now I want to manage these time stamp..
to do this I can fill a tm structure then using mktime and obtain unix time.
With unix time I could print it, or use it for other computation.

This example explain our scope, that is to use only conversion functions, not to 
provide fully posix time library, because is more difficult to create a generic 
implementation for all time functions.

Generally we think that posix time avrlibc implementation could provide only 
conversion functions, that could have sense on avr target, for all other type 
applications everyone should implement theirs time functions.


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