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'R: Clock/calendar using a 16F84 and LED display (6'
1997\12\14@105939 by Ivano BONASSINA

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Hi, Yes, I'm very interested to your Asm code.
I can also improve it and send to all the final project
( is a simple clock ... no copyright I think!)

My new request_____________________________
I'm an hobbiest, I wont to realize a clock calendar
using some LED display ( like appear in the bank )
that shows time, day, month and years.
I have a PIC 16F84 programmer and experience
on digital project but the design, starting from
zero, is too hard for me.
Also I think that in the WORLD more than one
person has already design it!
Question:
Have you an ASM code for PIC 16F84 to realize a
clock calendar with external I2C powered back-up
chip ( MK41T56 or PCF8573, ...)?
Do you know where I can look for?
Thank you in advance.
Bye. Ciao.      Email: spam_OUTbonassinTakeThisOuTspamtin.it
________________________________________


-----Messaggio originale-----
Da:     Aaron Hickman [SMTP:.....hickmaabKILLspamspam@spam@DUNX1.OCS.DREXEL.EDU]
Inviato:        domenica 14 dicembre 1997 2.46
A:      PICLISTspamKILLspamMITVMA.MIT.EDU
Oggetto:        Re: Clock/calendar using a 16F84 and LED display (6) HH:MM:SS +k
ey to
show DATE ( DD:MM:YY)

Ivano,

       This morning I finished a short segment of code that uses a
PIC16C84 to read the date and time (HH:MM:SS AM/PM) from a Philips'
PCF8583 calendar clock.  The code is sort of cut and paste from other
sources found on the net, but it works.  Right now the 16C84 is sending
the time and date info to an RS-232 port for debugging purposes.  If you,
or anyone else are interested in the ASM file let me know and I will send
it to you.  It is well documented, but very could use some refining.

Let me know,

Aaron Hickman


On Sun, 14 Dec 1997, Ivano BONASSINA wrote:

> Someone have a simple ASM file like described in the Subject?
> Thanks a lot in advance
> .....BonassinKILLspamspam.....tin.it
>

1997\12\14@163759 by Ivano BONASSINA

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part 0 1510 bytes
-----Messaggio originale-----
Da:     Wynn Rostek [SMTP:EraseMEwarspam_OUTspamTakeThisOuTPALMNET.NET]
Inviato:        domenica 14 dicembre 1997 21.26
A:      PICLISTspamspam_OUTMITVMA.MIT.EDU
Oggetto:        Re: Clock/calendar using a 16F84 and LED display (6) HH:MM:SS +k
ey
        to show DATE ( DD:MM:YY)

At 12:27 AM 12/14/97 +0100, you wrote:
>Someone have a simple ASM file like described in the Subject?

I actually did a countdown clock, days, hours, minutes, seconds using a
16c84 driving an LCD display.  I wrote constant execution time code (both
paths of a branch take the same number of clock cycles) and played around
with the seconds and minutes padding until I had less than a millisecond a
day drift from WWV.
(Off by less than a second a year)

I have always wanted to do a regular clock that would keep that kind of
accuracy, (Battery backup so it didn't lose the setting even if power was
down for a week. The countdown timer was battery backed up so power hits
wouldn't affect it. Thats why we used the LCD display, low current draw on
the backup battery.)

I actually started on the code for the regular clock, but never finished it.
I think it still needs one or two routines written.  If you're really
interested I can dig around for the code, but it may take 2 or 3 days to
come up with it.

Wynn Rostek

(P.S.  It was built into a model of the X-33, a new prototype spacecraft
being developed.  It was given to the head of the X-33 effort to put on his
desk to act as a constant reminder of his approaching deadline.)

1997\12\15@162045 by Ivano BONASSINA

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part 0 1524 bytes
-----Messaggio originale-----
Da:     Raak, Cory [SMTP:@spam@coryrKILLspamspamGENTEX.COM]
Inviato:        luned“ 15 dicembre 1997 21.41
A:      KILLspamPICLISTKILLspamspamMITVMA.MIT.EDU
Oggetto:        Re: Clock/calendar using a 16F84 and LED display (6) HH:MM:SS +key to show DATE ( DD:MM:YY)

Yea the same thing goes for me, maybe you should post it on a web site!!

{Quote hidden}

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