By AN3, in order to enter the alarm clock feature is enabled, when the alarm clock, every minute, year, month, day and time, minute and second settings, until the exit status set by AN4, whether the adjustment and regulation of the use of the alarm clock hour, minute, second , year, month, day, time, hour, minute, second figure the middle of the second row LCD display small speakers, said the opening of an alarm clock function, is prohibited without an alarm clock function (adjustment of status can be set)

lcd_clock.c

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