在STM32CUBEMX生成的串口通信代碼裏實現printf輸出

/* USER CODE BEGIN PV */ #include "stdio.h" #ifdef __GNUC__ #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) #else #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) #endif PUTCHAR_PROTOTYPE {

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