AT89S52 based on automatic timekeeping digital alarm clock. The whole point of digital clock with timer and alarm clock function, time display too. Sub. Seconds to 12-hour show. Buttons adjust the time by the hour and minute-bit-bit, the whole point and the alarm time are blinking manner. Procedures are divided into the following modules: digital tube display module, control module, processing module interrupt timer T0, T1 timer interrupt handling module, the keyboard scan module, the keyboard processing module, delay module and the whole point of flashing module

digital_clock.C

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