STM32F103，标准库工程模板，增加sys.h文件实用性非常强(Standard library engineering template)

stm32f103系列标准库工程。包含20多个例程。(STM32F103 standard library engineering)

STM32F103的标准库工程代码，已完成各项文件的添加，主函数和中断一片空白，改变芯片型号即可开始写自己的代码，用于新工程的开始(STM32F103 standard library engineering code, has completed the addition of various documents, the main function and interrupt a blank, change the chip model can start to write their ow