1-2-15-按键双击和长按程序

代码说明：

  在stm32工程中，长按和短按的代码书写， 调用的读取按键状态的底层函数。封装成的按键函数代码。下面是函数的头文件，和.c文件的代码。使用定时器来扫描按键。(In STM32 project, the code of long press and short press is written, and the underlying function of reading key status is called. Encapsulated key function code. The following is the header file of the function, and the code of the. C file. Use a timer to scan keys.)