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;

}