[stm32F746] printf 사용 시 추가해야할 코드
#include <stdio.h>
-------------------------------------
/* USER CODE BEGIN 0 */
#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 */
if(ch == '\n')
{
HAL_UART_Transmit(&huart1, (uint8_t *) "\r", 1, 0xFFFF);
}
HAL_UART_Transmit(&huart1, (uint8_t *) &ch, 1, 0xFFFF);
return ch;
}
/* USER CODE END 0 */
-> 빨간 글씨 부분은 사용하는 UART에 맞게 변경