STM32L0系列串口重定义的方法

STM32L0系列串口重定义的方法

 

芯片型号：STM32L071RBT6

本篇重点：将printf( ) 函数重定义到USART1

集成开发工具（IDE）：IAR

 

#ifdef __GNUC__
/* With GCC/RAISONANCE, small uartPrintf (option LD Linker->Libraries->Small uartPrintf
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 uartPrintf 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;

}