STM32F103两种串口输出的方式 学习笔记

#include "stm32f10x.h" #include "stm32f10x_rcc.h" #include "stm32f10x_gpio.h" #include "stm32f10x_usart.h" #include "stm32f10x_crc.h" #include "system_stm32f10x.h" #include "stdio.

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