RTC via TMR0 + HSERIN and 16F916

[boban]

Hello Skimask,
thanks a lot for your help, I see.
I am thinking that the easyest way to solve my problem is to use

OPTION_REG = $d5

disable
intManagement:
if (INTCON.2 == 1) then
ticks = ticks + 1 ' Count pieces of seconds
If ticks >= 61 Then
if (ACTIVITY_LED == 1) then
low ACTIVITY_LED
else
high ACTIVITY_LED
endif
ticks = 0 'One second elasped - update time
manageIntSecond = 1
endif
INTCON.2 = 0
endif
INTCON.7 = 1
resume

[skimask]

All other things being equal, that would give you roughly 49-50 seconds of slow error per day. Add one second every half hour, and you'll practically be dead on.