RTC time keeping

alenze's picture
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Assembly language (& enhanced) version of "AVR134 - RTC using asyncronuous timer". Function uses 79/93 words (as compared to 204 words needed by the C-compiler variant) and provides day-of-the-week book-keeping, too. Assembly code to correctly set-up 32KHz timer included Updated: optionally *full* leap year support (up to judgement day). Updated 07-19-02: added functions for manual /GPS clock setup (perpetual calendar etc.) Updated 01-07-05: fixed week-# algo in perpetual calendar