I'll gave you the answer here. It's about RTCC from PIC18F44J11
procedure display_treatment_time (byte in line, byte in pos) is
RTCCFG_RTCPTR1 = 0
RTCCFG_RTCPTR0 = 0
if RTCCFG_RTCSYNC == 0 then
second = RTCVALL ; read second, bcd packed St1St2
end if
St2 = (second & 0b0000_1111)
St1 = ((second >> 4) & 0b0000_1111)*10 ; convert to hexa
second = St1 + St2
second_trt = 59 - second ; decrement treatment time
if second == 59 then ; here is the trick I've asked about, can
you do it better?
old_second = second
end if
if (second == 0) & (old_second == 59) then
old_second = 0
minute_trt = minute_trt - 1
end if
if minute_trt == 0 then ; stop treatment
minute_trt = 29
end if
lcd_cursor_position (line,pos)
print_decimal_2 (lcd, minute_trt, "0")
lcd = ":"
print_decimal_2 (lcd, second_trt, "0")
end procedure
On Tue, Jun 29, 2010 at 9:50 AM, Sunish Issac <[email protected]> wrote:
> working on ds1302 ? First it was bcd, I did some coding recently, but needs
> some cleanup.
> BTW I did not understand your question clearly.
>
> Sunish
>
> On Tue, Jun 29, 2010 at 12:02 PM, vasile surducan <[email protected]>wrote:
>
>> Hi all,
>>
>> I have the following problem: one second register of an RTCC is
>> incremented from 0 to 59. Every new value of the register remains unchanged
>> exactly one second (including 0 and 59). I need to sense every rollover of
>> that register from 59 to 0 to increment a minute register. The second
>> register can't be modified because it keeps the real time. How that can be
>> done ? (there is no other flag available)
>>
>> thx,
>> Vasile
>>
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