stm32 serial port printf function redirection-EEWORLD

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The printf function redirection of the serial port is divided into two cases: using the MicroLIB library and not using the MicroLIB library. The specific implementation code is as follows:

#if 1

/*****************If you don't use MicroLIB library, you need to add this part********************************/

//Cancel ARM's semi-host working mode

//#pragma import(__use_no_semihosting) // Make sure no functions using semihosting are linked from the C library

//struct __FILE // Support functions required by the standard library

//{

// int handle;

//};

//FILE __stdout; // FILE is typedef'd in stdio.h

//void _sys_exit(int x) // Define _sys_exit() to avoid using semihost mode

//{

// x = x;

//}

/****************************************************** *********************/

int fputc(int ch, FILE *f)

{

HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1,GPIO_PIN_SET);

HAL_UART_Transmit(&huart2,(uint8_t*) &ch, 1, 1);

HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1,GPIO_PIN_RESET);

return ch;

}

#endif

Keywords：stm32 Reference address：stm32 serial port printf function redirection

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