在本系统的主程序中，随主程序运行到不同的阶段，主程序要在时钟的驱动下，

In the main program of the system, as the main program runs to different stages, the main program must be driven by the clock, first complete the initialization of each module of the system, and then enter the loop; after entering the loop, scan the keyboard The program is called, the keyboard is scanned to input information, and after the operation, the data refresh subroutine is called to display the input information on the LCD1602 in real time, realizing 3 time timing settings, and then completing the adjustment of the real-time time; when the real-time clock is running forward , Compare the timing time with the real-time time of the system, and enter the alarm procedure when the two are equal.

In the main program of this system, with the main program running to different stages, the main program to be driven by the clock, first complete the initialization of the system modules, and then into the loop; Compare the time of timing with the real-time time of the system, and when the two are equal, the alarm program is entered.

In the main program of the system, with the main program running to different stages, the main program must first initialize each module of the system with the clock driving, then enter the loop. After entering the loop, the keyboard scanning subroutine is called, the keyboard input information is scanned, the data refresh subroutine is invoked after operation, and the input information is displayed in real time in LCD1602. When the real-time clock is running forward, compare the timing time with the real-time time time of the system, and enter the alarm program when the two are equal.