参考STM32固件库编写的LPC1114的GPIO口底层函数，里面有IO初始化、读/写IO、反转IO状态等函数。-Reference STM32 firmware library written in low-level functions LPC1114 GPIO port, which has IO initialization, read/write IO, IO status inversion function.

使用MDK5建立的STM32F10单片机工程模板，已经实现了在不使用MicroLIB库的前提下重定向printf和scanf函数到USART，可直接使用串口助手调试。-STM32 project template in MDK5, Regtarge std. function scanf and printf to usart1 whitout MicroLib.