系统软件部分运用C语言编制单片机程序，主要包括主程序、动态扫描显示子程序和按键扫描子程序等。

System software part of the preparation of the use of C language SCM process, including the main program, dynamic scanning display routines and key scan subroutine and so on.

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CTBUG提供了许多很有用的子程序供用户调用，其中包括有键盘扫描、键盘输入等待，显示更新，数据显示等子程序。

CTBUG supplies a lot of very useful subroutines which may be called by users, including Keyboard Scan, Keyboard Input Wait, Display Update and Data Display subroutines and so on.

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