基于STM32F1xx系列的，Kill ARM开发环境下，用C语言编写的一个简单易懂的定时器中段溢出控制LED闪烁的程序。-Based STM32F1xx series under Kill ARM development environment using C language middle of a straightforward timer overflow control LED blinking program.

基于STM32F1xx系列微处理器，Kill ARM开发环境下，用C语言编写的一个逻辑简单易懂的三个按键控制三个LED亮灭的程序。主要启发初学者如何配置GPIO。-Based on STM32F1xx series microprocessor, ARM Kill development environment, using C language of a simple logic to understand the three button control three LED light ou