求救新建工程串口log都打不出来

As you like 提问时间：2020-9-22 20:03 /

STM32F429新建一个工程。但是串口log都没有打出来，不知道开没有开机呢！
main.h

#define USART_LOG                      USART3
#define USART_LOG_CLK_ENABLE()             __HAL_RCC_USART3_CLK_ENABLE()
#define USART_LOG_RX_GPIO_CLK_ENABLE()    __HAL_RCC_GPIOB_CLK_ENABLE()
#define USART_LOG_TX_GPIO_CLK_ENABLE()    __HAL_RCC_GPIOB_CLK_ENABLE()

#define USART_LOG_FORCE_RESET()          __HAL_RCC_USART3_FORCE_RESET()
#define USART_LOG_RELEASE_RESET()          __HAL_RCC_USART3_RELEASE_RESET()

/* Definition for USART_LOG Pins */
#define USART_LOG_TX_PIN                   GPIO_PIN_10
#define USART_LOG_TX_GPIO_PORT             GPIOB
#define USART_LOG_TX_AF                   GPIO_AF7_USART3
#define USART_LOG_RX_PIN                   GPIO_PIN_11
#define USART_LOG_RX_GPIO_PORT             GPIOB
#define USART_LOG_RX_AF                   GPIO_AF7_USART3

/* Definition for USART_LOG's NVIC */
#define USART_LOG_IRQn                   USART3_IRQn
#define USART_LOG_IRQHandler             USART3_IRQHandler

main.c

static void Init_USART_Log_GPIO(void)
{
Uart_Log.Instance = USART3;
Uart_Log.Init.BaudRate = 115200;
Uart_Log.Init.WordLength = UART_WORDLENGTH_8B;
Uart_Log.Init.StopBits = UART_STOPBITS_1;
Uart_Log.Init.Parity = UART_PARITY_NONE;
Uart_Log.Init.Mode = UART_MODE_TX_RX;
Uart_Log.Init.HwFlowCtl = UART_HWCONTROL_NONE;
Uart_Log.Init.OverSampling = UART_OVERSAMPLING_16;

if(HAL_UART_Init(&Uart_Log) != HAL_OK)
{
      _Error_Handler(__FILE__, __LINE__);
}

/* USART3_IRQn interrupt configuration */
//HAL_NVIC_SetPriority(USART_LOG_IRQn, 5, 0);
//HAL_NVIC_EnableIRQ(USART_LOG_IRQn);
}

#ifdef __GNUC__
/* With GCC, 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__ */

PUTCHAR_PROTOTYPE
{
  /* Place your implementation of fputc here */
  /* e.g. write a character to the USART3 and Loop until the end of transmission */
  HAL_UART_Transmit(&Uart_Log, (uint8_t *)&ch, 1, 0xFFFF);

  return ch;
}

stm32f4xx_hal_msp.c

void HAL_UART_MspInit(UART_HandleTypeDef *huart)
{
  GPIO_InitTypeDef  GPIO_InitStruct;

  /*##-1- Enable peripherals and GPIO Clocks #################################*/
  /* Enable GPIO TX/RX clock */
  USART_LOG_TX_GPIO_CLK_ENABLE();
  USART_LOG_RX_GPIO_CLK_ENABLE();
  /* Enable USART1 clock */
  USART_LOG_CLK_ENABLE();

  /*##-2- Configure peripheral GPIO ##########################################*/
  /* UART TX GPIO pin configuration  */
  GPIO_InitStruct.Pin    = USART_LOG_TX_PIN;
  GPIO_InitStruct.Mode    = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull    = GPIO_NOPULL;
  GPIO_InitStruct.Speed    = GPIO_SPEED_FAST;
  GPIO_InitStruct.Alternate = USART_LOG_TX_AF;

  HAL_GPIO_Init(USART_LOG_TX_GPIO_PORT, &GPIO_InitStruct);

  /* UART RX GPIO pin configuration  */
  GPIO_InitStruct.Pin = USART_LOG_RX_PIN;
  GPIO_InitStruct.Alternate = USART_LOG_RX_AF;

  HAL_GPIO_Init(USART_LOG_RX_GPIO_PORT, &GPIO_InitStruct);

  /*##-3- Configure the NVIC for UART ########################################*/
  /* NVIC for USART1 */
  HAL_NVIC_SetPriority(USART_LOG_IRQn, 0, 1);
  HAL_NVIC_EnableIRQ(USART_LOG_IRQn);
}

请大神指点一二，有与新人没有币，有酬必报。