Real time clock ICs

[BobK]

HI Eng4444,

The program listing that you sent me has the following last line:

LCDOut $FE,1,"Memorised"

Do you have anything after that? There's more to it like the part that writes the new values to the RTC. I got the following from Melanie's code:

' Make the User feel happy
' Save 12/24 Hours to BCD DS1307's Format
' ---------------------------------------
CounterA=SetHour
If SetTime=1 then
If CounterA>12 then CounterA=CounterA-12
If CounterA=0 then CounterA=12
endif
Gosub ConvertBCD
RTCHour=CounterB

' Save the Hours Value

If SetTime=1 then
RTCHour.6=1
' Save the 12 Hour Mode Flag
If SetHour=>12 then RTCHour.5=1
' Save the 'PM' Flag
endif
'
' Save Minutes
' ------------
CounterA=SetMin
Gosub ConvertBCD
RTCMin=CounterB
'
' Save Seconds
' ------------
CounterA=SetSec
Gosub ConvertBCD
RTCSec=CounterB
'
' Save Year
' ---------
CounterA=SetYear
Gosub ConvertBCD
RTCYear=CounterB
'
' Save Month
' ----------
CounterA=SetMonth
Gosub ConvertBCD
RTCMonth=CounterB
'
' Save Day
' --------
CounterA=SetDay
Gosub ConvertBCD
RTCDay=CounterB
'
' Calculate Day of Week & Save
' ----------------------------
' Melanie's fudge for calculating Days of Week
' using PBP's integer math...
' by the time someone's clock displays the
' the wrong Day of Week, I'll hopefully have long
' retired and be past caring...
' I wouldn't however go stick this routine in a
' Nuclear Power Station to purge the reactor
' every Monday morning without checking how far it
' will work before the integer math overflows...
' In my routine RTCWDay=1 is a Tuesday (the
' start of my week) and continues sequentially
' until RTCWDay=7 which is a Monday
CounterA=SetYear+4
CounterB=SetMonth
If SetMonth<3 then
CounterA=CounterA-1
CounterB=CounterB+12
endif
CounterD=(SetDay+(153*CounterB-457)/5+365*CounterA+CounterA/4-CounterA/100+CounterA/400+2) MOD 7
RTCWDay=CounterD+1
'
' Do the Business
' ---------------
I2CWrite SDApin,SCLpin,$D0,$00,RTCSec,RTCMin,RTCHour,RTCWDa y,RTCDay,RTCMonth,RTCYear,RTCCtrl]
Pause 1000
Gosub SetButtonRelease
Goto ReDisplay
endif
Gosub SetButtonRelease
Goto SetupLoop ' Loop for Next Menu Item
endif
'
' Menu TimeOut Counter
' --------------------
Pause 1 ' Kill 1mS
TimeOut=TimeOut+1
If TimeOut>20000 then goto ReDisplay
' User paused too long
' Return User to Time & Date Display
' This will however bounce the User to the original
' Setup Menu start point if the DS1307 has not
' been initialised
Goto SetupEntryLoop ' Loop for Button Press
'
End


Check this out> It could be why you're not working.

BobK

[Eng4444]

i re-donloaded the program but everything is still freezing.

Time is not advancing (i mean being incremented).


Melanie didn't answer yet so i think she might have a good answer...


Today is my Presentation! :-)