[ECOS] RTC -> Gregorian Conversion (off topic)

[ECOS] RTC -> Gregorian Conversion (off topic)

[Trenton D. Adams]

Sorry for the off topic question, but I don't know where else to look
for a quick answer.  Does anyone here have tables/routines for
calculating the actual date/time from an RTC value?  Does eCos do this
already?  If so, where?

I also need to go from date/time to RTC.

Trenton D. Adams
Embedded Developer
Windows Developer
Extreme Engineering Ltd.
Calgary Alberta.

RE: [ECOS] RTC -> Gregorian Conversion (off topic)

[Gary Thomas]

On 19-Jul-2001 Trenton D. Adams wrote:
> Sorry for the off topic question, but I don't know where else to look
> for a quick answer.  Does anyone here have tables/routines for
> calculating the actual date/time from an RTC value?  Does eCos do this
> already?  If so, where?
> 

eCos does not have this.

You can probably find what you want in the time/date conversions from
GLIBC, the standard GNU C library.

> I also need to go from date/time to RTC.
> 
> Trenton D. Adams
> Embedded Developer
> Windows Developer
> Extreme Engineering Ltd.
> Calgary Alberta.
> 

RE: [ECOS] RTC -> Gregorian Conversion (off topic)

[Trenton D. Adams]

Ok, thanks I'll take a look.

Trenton D. Adams
Embedded Developer
Windows Developer
Extreme Engineering Ltd.
Calgary Alberta.


  > -----Original Message-----
  > From: gary@chez-thomas.org [ mailto:gary@chez-thomas.org ] On Behalf
Of
  > Gary Thomas
  > Sent: Thursday, July 19, 2001 1:40 PM
  > To: Trenton D. Adams
  > Cc: eCos mailing list
  > Subject: RE: [ECOS] RTC -> Gregorian Conversion (off topic)
  > 
  > 
  > On 19-Jul-2001 Trenton D. Adams wrote:
  > > Sorry for the off topic question, but I don't know where else to
look
  > > for a quick answer.  Does anyone here have tables/routines for
  > > calculating the actual date/time from an RTC value?  Does eCos do
this
  > > already?  If so, where?
  > >
  > 
  > eCos does not have this.
  > 
  > You can probably find what you want in the time/date conversions
from
  > GLIBC, the standard GNU C library.
  > 
  > > I also need to go from date/time to RTC.
  > >
  > > Trenton D. Adams
  > > Embedded Developer
  > > Windows Developer
  > > Extreme Engineering Ltd.
  > > Calgary Alberta.
  > >

Re: [ECOS] RTC -> Gregorian Conversion (off topic)

[Jonathan Larmour]

"Trenton D. Adams" wrote:
> 
> Sorry for the off topic question, but I don't know where else to look
> for a quick answer.  Does anyone here have tables/routines for
> calculating the actual date/time from an RTC value?  Does eCos do this
> already?  If so, where?
> 
> I also need to go from date/time to RTC.

There are various functions in the C library to convert between time_t's
and real dates if that's what you mean, although they don't take into
account all the esoteric rules for timezones. That's too much for a typical
embedded system's needs. Currently the time() function will retrieve the
time from the wallclock device, so that would have to have been initialized
correctly.

Look around in languages/c/libc/time/current

Jifl
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RE: [ECOS] RTC -> Gregorian Conversion (off topic)

[Trenton D. Adams]

  > 
  > "Trenton D. Adams" wrote:
  > >
  > > Sorry for the off topic question, but I don't know where else to
look
  > > for a quick answer.  Does anyone here have tables/routines for
  > > calculating the actual date/time from an RTC value?  Does eCos do
this
  > > already?  If so, where?
  > >
  > > I also need to go from date/time to RTC.
  > 
  > There are various functions in the C library to convert between
time_t's
  > and real dates if that's what you mean, although they don't take
into
  > account all the esoteric rules for timezones. That's too much for a
  > typical
  > embedded system's needs. Currently the time() function will retrieve
the
  > time from the wallclock device, so that would have to have been
  > initialized
  > correctly.
  > 
  > Look around in languages/c/libc/time/current
  > 

Will do, thanks.