适用于STM32F103的战舰开发板，开发板厂商只提供了基于定时器功能实现的红外接收，前段时间刚好碰到一个项目，红外接收输入对应的IO口上没有定时器的功能的，网上没找到，就自己修改了一个，在开发板上测试可用。(The battleship development board for STM32F103 development board, manufacturers only provide infrared receiver based on the realization of the ti

使用中断方式i实现在STM32F103上的矩阵键盘。修改端口所有的需要修改的地方已用宏定义列出。方便修改(Use interrupt mode I to implement the matrix keyboard on STM32F103. All the modifications needed to modify the port are listed in the macro definition. Convenient modification)