Stm32 Keil implements serial port printf output Chinese characters

Add the following code that can be implemented in a GNUC way #ifdef __gnuc__/* with gcc/raisonance, small printf (option LD linker->libraries->small printf Set to ' Yes ') calls __io_putchar () */#define PUTCHAR_PROTOTYPE int __io_putchar (int ch) #else #define Putchar_p Rototype int FPUTC (int ch, FILE *f) #endif/* __gnuc__ */int main () {while (1) {}}/** * @brief Reta
  Rgets the C library printf function to the USART.  * @param None * @retval None * * Putchar_prototype {/* Place your implementation of FPUTC here */* e.g. write a

  character to the USART */Usart_senddata (USART1, (uint8_t) ch);
/* Loop until the end of transmission */while (Usart_getflagstatus (USART1, usart_flag_tc) = = RESET) {} return ch; } #ifdef Use_full_assert/** * @brief Reports The name of the source file and the source line number * wher
  E The Assert_param error has occurred.
 * @param file:pointer to the source file name * @param line:assert_param error Line source number * @retval None */void assert_failed (uint8_t* file, uint32_t line) {/* User can add his own implementation to Repor t the file name and line number, ex:printf (' Wrong parameters value:file%s on line%d\r\n ', file, line) */* INF
 Inite Loop */while (1) {}} #endif