说明：  利用试验平台提供的硬件资源设计一个电子表。该电子表以时、分、秒的形式实时显示当前时间，且具有校表功能，利用小键盘与标准时间校准
(Use test platform provides the hardware resources to design a spreadsheet. The electronic form in hours, minutes, seconds display the current time, and has a calibration function, use the keypad calibration with standard time)