HAL 笔记1----printf 串口重定向

idodoyo · 2015-07-18T09:04:47+00:00

HAL 笔记1----printf 串口重定向2 \7 N# I4 L) u' P5 S: j . D1 Y* r5 ~+ M/ B4 w* C: g6 P " G; z5 b& V7 k% N5 i! f+ W- C#ifdef __GNUC__: M' C9 q( u% [/ O9 c2 n c/ S* \: s9 { /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf ) ~$ e* y- z1 f6 p [3 w6 \7 M set to 'Yes') calls __io_putchar() */1 }2 j$ s3 A1 a9 t3 n; F #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)9 R% u/ \% z7 L) T7 Q #else % k5 K* M3 Q4 I# a4 d0 f8 `5 p #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)6 I2 A* G# ~! x- H #endif /* __GNUC__ */- ~& M6 d9 Y8 w- g) R/ A /** + Q% p4 x) V* a( l# Z$ ] * @brief Retargets the C library printf function to the USART.& N; E( k3 _ i * @param None- ?- ]4 ~. {# ? * @retval None 6 d9 T: T) F& n* }! Y& b M */, C: H0 H5 X' a7 @+ W1 Q PUTCHAR_PROTOTYPE8 J0 @" y: l7 |7 T, Z { ( s1 F* ?$ f! l; G& Z /* Place your implementation of fputc here */ 1 ]6 B3 @, t5 c ? /* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */ 0 Y) S$ H6 m1 C2 G" K HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xFFFF); 2 g0 r g# v0 F( ] 9 B# R, j$ p* u3 j& G7 w2 d7 h7 b9 i* p return ch; ) c4 |/ i0 Y- ?* }9 V/ U}% p5 J3 I: X6 o* c1 r0 E ; g" q9 a0 |, `' P/ b* \ 这里面是putchar, getchar 类似., HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xFFFF); 参数huart1 替换为所需要的串口号即可/ V* v$ b; K' l 2 [, _$ r: b/ N) x) F* V

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idodoyo 发布时间：2015-7-18 17:04

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HAL 笔记1----printf 串口重定向

#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;
}

这里面是putchar,  getchar  类似., HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xFFFF); 参数huart1 替换为所需要的串口号即可