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Real Time Clock to the millisecond? — Parallax Forums

Real Time Clock to the millisecond?

ArchiverArchiver Posts: 46,084
edited 2001-11-30 01:22 in General Discussion
I need to get a real time clock reading with milliseconds.
i.e. hh[noparse]:mm:[/noparse]ss.mmm

All of the RTC chips seem to only give whole seconds.

Has anyone done this or have any ideas on how it might be done?

/Mark

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-11-28 21:29
    I need to get a real time clock reading with milliseconds.
    i.e. hh[noparse]:mm:[/noparse]ss.mmm

    All of the RTC chips seem to only give whole seconds.

    Has anyone done this or have any ideas on how it might be done?

    /Mark
  • ArchiverArchiver Posts: 46,084
    edited 2001-11-29 07:39
    Hi,

    The Dallas DS1215 counts hundredths of seconds, seconds, minutes, hours,
    Days,date of month, and years. Dallas is Maxim now.

    Regards peter

    Oorspronkelijk bericht
    Van: mspohr@n... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=FTWRRSNgxKS9kNCnBhyXVSb4ebpiH00A_rZ3Aj09y0WtcBcmSk_9N_EsTuIbFIbgBEequCz0uvOw]mspohr@n...[/url
    Verzonden: woensdag 28 november 2001 13:29
    Aan: basicstamps@yahoogroups.com
    Onderwerp: [noparse][[/noparse]basicstamps] Real Time Clock to the millisecond?

    I need to get a real time clock reading with milliseconds.
    i.e. hh[noparse]:mm:[/noparse]ss.mmm

    All of the RTC chips seem to only give whole seconds.

    Has anyone done this or have any ideas on how it might be done?

    /Mark


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  • ArchiverArchiver Posts: 46,084
    edited 2001-11-29 07:53
    Hi,

    Or take a look at
    http://www.national.com/an/AN/AN-353.pdf
    application note for MM58167B
    Counts really milliseconds

    Regards peter

    Oorspronkelijk bericht
    Van: mspohr@n... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=bb-R5IOphSaIx1uwoVQjy1lbRSNHEuLaI7QPW8_ieovbaHC4SCm-STy1Sya2hKeFXgUBjQ]mspohr@n...[/url
    Verzonden: woensdag 28 november 2001 13:29
    Aan: basicstamps@yahoogroups.com
    Onderwerp: [noparse][[/noparse]basicstamps] Real Time Clock to the millisecond?

    I need to get a real time clock reading with milliseconds.
    i.e. hh[noparse]:mm:[/noparse]ss.mmm

    All of the RTC chips seem to only give whole seconds.

    Has anyone done this or have any ideas on how it might be done?

    /Mark


    To UNSUBSCRIBE, just send mail to:
    basicstamps-unsubscribe@yahoogroups.com
    from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.


    Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-11-29 15:39
    Thanks very much!

    This looks like it will do the job.

    I really appreciate your help.

    Best regards,
    Mark

    --- In basicstamps@y..., "peter verkaik" <peterverkaik@b...> wrote:
    > Hi,
    >
    > Or take a look at
    > http://www.national.com/an/AN/AN-353.pdf
    > application note for MM58167B
    > Counts really milliseconds
    >
    > Regards peter
    >
    >
    >
    Oorspronkelijk bericht
    > Van: mspohr@n... [noparse][[/noparse]mailto:mspohr@n...]
    > Verzonden: woensdag 28 november 2001 13:29
    > Aan: basicstamps@y...
    > Onderwerp: [noparse][[/noparse]basicstamps] Real Time Clock to the millisecond?
    >
    > I need to get a real time clock reading with milliseconds.
    > i.e. hh[noparse]:mm:[/noparse]ss.mmm
    >
    > All of the RTC chips seem to only give whole seconds.
    >
    > Has anyone done this or have any ideas on how it might be done?
    >
    > /Mark
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@y...
    > from the same email address that you subscribed. Text in the
    Subject and
    > Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to
    http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-11-30 01:22
    Have you considered connecting to a GPS receiver. The GPS signal
    includes a time component in the data stream.

    Chris Dundorf

    <<>>


    Message: 2
    Date: Wed, 28 Nov 2001 21:29:20 -0000
    From: mspohr@n...
    Subject: Real Time Clock to the millisecond?

    I need to get a real time clock reading with milliseconds.
    i.e. hh[noparse]:mm:[/noparse]ss.mmm

    All of the RTC chips seem to only give whole seconds.

    Has anyone done this or have any ideas on how it might be done?

    /Mark
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