Re: DCF77 driver available
Florian Lohoff (flo@quit.mediaways.net)
Wed, 12 Aug 1998 15:40:07 +0200
On Mon, Aug 10, 1998 at 03:52:56PM +0200, Maximilian Rixius wrote:
> Hi,
>
> I just wrote a small driver (actually just a line in do_timer() and a
> new entry to the procfs) for my selfmade DCF77 receiver (DCF77 is the
> official German time signal broacast at 77.5kHz).
>
> My hardware is very simple and cheap; it just demodulates the signal and
> feeds it to a joystick button input. The joystick button register is
> sampled with each timer tick and written to a ringbuffer. The buffer is
> examined and converted to readable output just like that of "date" each
> time /proc/dcf77 is read. I use this to set the time using "date"
> (funnily date is stupid enough not to understand its own output as
> input).
>
> If anyone's interested I could provide both hardware and software
> documentation.
There is support for those "simple" dcf77 receivers in the xntpd
package (dcf77 pps (peak per second?)) driver ... This does not
need any kernel changes.
Flo
--
Florian.Lohoff@mediaWays.net +49-5241-80-7085
aka flo@mini.gt.owl.de @HOME +49-5241-470566
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