Hi!

BCD stands for binary coded decimal. ASCII code of numbers from 0-9 is just
number + 48. I presume readout from RTC comes in a format like this: hi
nibble holds tens and low nibble holds ones of  clock.So what you want to do
is this:

result in BCD from RTC is in w:

;TENS
    movwf    TEMP        ;store result somewhere
    swapf     TEMP, w    ;reverse nibbles in w
    andlw    00001111b  ;mask ones nibble. You have binary value of tens in
w now.
    addlw    .48               ;add 48 decimal and you have ASCII value of
tens now. Here you have two options: you can either display it
;or  store it somewhere and display the lot later.
;ONES
    movf    TEMP, w        ;get readout once again
    andlw    00001111b    ;mask tens nibble.You have binary value of ones in
w now.
    addlw    .48                 ;convert to ASCII

    store, display, erase, whatever

Regards, Samo


> Hi all,
>
> I'm working on a project using an 16F877, a DS1307 rtc and an LCD.  The
> problem I am having is getting the rtc data displayed correctly on the
LCD.
>
> the Ds1307 data is in BCD format, and doesn't want to easily be displayed.
> I'm sure someone out there has done this before.  I'm just looking for
> suggestions.
>
> Thanks,
>
> Jim Monteith
>
> --
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