STM32F1, STMCubeMX, printf

STM32F1, STMCubeMX, printf

USART1을 통해 printf문으로 디버깅 로그를 보는 방법을 소개합니다.

0. 참고 사이트

• https://www.waveshare.com/wiki/Open103V

1. HW 연결

GND, TX, RX 만 연결하였습니다.

TX, RX는 당연히 Cross 해야 합니다.

2. USART1 > Asynchronous

3. Keil > usart.c

아래 텍스트를 USER CODE BEGIN ~ END 사이에 복붙하세요

/* USER CODE BEGIN 1 */ #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_PROTOTYPE int fputc(int ch, FILE *f) #endif /* __GNUC__ */ /**   * @brief  Retargets 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 EVAL_COM1 and Loop until the end of transmission */   HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xFFFF);   return ch; } /* USER CODE END 1 */

4. Keil > main.c

printf("printf %s %d\r\n", "Good", 7);
HAL_Delay(1000);

5. 소스

https://github.com/sglee0223/stm32f103ve/tree/master/printf

6. 결과