求翻译：最后在软件方面，介绍了主程序、键盘扫描子程序、PWM信号发生程序、测速子程序和显示子程序的编写思路以及具体的程序实现。是什么意思？

Finally, the software side, the main program, keyboard scanning subroutine, the pwm signal process, tachometer subroutine and display routines to write ideas, as well as specific procedures for implementation.

Finally, in terms of software, the main program, scan the sub-program, PWM signal detection program, sub-program and the preparation of the sub-program as well as specific program ideas.

Finally in the software aspect, introduced the master routine, the keyboard scanning subroutine, the PWM signal has the procedure, measures the fast subroutine and the demonstration subroutine compilation mentality as well as the concrete procedure realization.

Finally in terms of software, describes the main program, the keyboard scan subroutines, PWM signal generator program, speed measurement and display writing ideas and specific program of the subroutine.

正在翻译，请等待...