基于ARM Cortex-M4F(TM4C123)单片机 ，编程控制TM4C123微控制器的RTC 模块，实现一个简易的数字时钟，具有多种功能
?【功能】
?（1）UART输出当前时间信息，UART可设置日期和时间，设置方法自定；
?（2）可通过UART 设置/查询闹钟，定闹时间到，从UART输出提醒；
?（3）在液晶屏上显示日期和时间信息（中文）；
?（4）可使用实验板上的K1-K4按键修改日期和时间，设置方法自定；
?注：该题依赖于“3”，需先完成“3”才可做该题
?（5）农历功能，农历自动跟踪阳历的变化；
?（6）24节气功能(Based on ARM Cortex-M4F (TM4C123) MCU, the RTC module of TM4C123 microcontroller is programmed and controlled to realize a simple digital clock, which has many functions.
(function)
(1) UART output the current time information, UART can set the date and time, set the method to set itself.
(2) the alarm clock can be set / inquired by UART, and the time is up until UART is output.
(3) display date and time information on LCD screen (Chinese);
(4) you can use the K1-K4 button on the experiment board to change the date and time, and set the method to set it.
Note: the question depends on "3", and it is necessary to finish "3" first.
(5) the function of the lunar calendar, and the lunar calendar automatically tracks the changes of the solar calendar.
(6) the function of 24 throttle)