STM32F103ZE串口测试程序，可以通过超级终端输出和输入数据，此程序完整可用。-STM32F103ZE serial port test program, you can output and input data HyperTerminal, the integrity of the process is available.

STM32的在串口模式下对printf重新定向一个的实例程序，可以参考下，在STM32的IAR开发环境下。-The STM32 redirect printf in the serial mode, one instance of program, you can refer to the STM32 IAR development environment.

stm32 IAR环境printf函数调用 的方法(The method of printf function call in STM32 IAR environment)