STM32L151系列的串口接收丢数据

hd8zsj · 发表于 2017-9-28 10:06:39

问题描述：STM32L151，串口3，配置如下//串口配置

void MX_USART3_UART_Init(void)
{

  huart3.Instance = USART3;
  huart3.Init.BaudRate = 115200;
  huart3.Init.WordLength = UART_WORDLENGTH_8B;
  huart3.Init.StopBits = UART_STOPBITS_1;
  huart3.Init.Parity = UART_PARITY_NONE;
  huart3.Init.Mode = UART_MODE_TX_RX;
  huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;//ó2¼tá÷¿ØÖÆ
  huart3.Init.OverSampling = UART_OVERSAMPLING_16;//1y2éÑùéèÖÃ
  if (HAL_UART_Init(&huart3) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

}

//IO配置
if(huart->Instance==USART3)
  {
GPIO_InitStruct.Pin = LOG_TX3_Pin|LOG_RX3_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;//íÆíêêä3ö
GPIO_InitStruct.Pull = GPIO_PULLUP;//éÏà-
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;//Ëù¶è
GPIO_InitStruct.Alternate = GPIO_AF7_USART3;//¸′óÃ
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
  }

//串口中断

void USART3_IRQHandler(void)
{
unsigned int timeout=0;
  HAL_UART_IRQHandler(&huart3);

timeout=0;
  while (HAL_UART_GetState(&huart3) != HAL_UART_STATE_READY)//原子方式
{
   timeout++;
   if(timeout>2000) break;
}

timeout=0;
while(HAL_UART_Receive_IT(&huart3, &Usart3.MidBuffer, 1) != HAL_OK)//原子方式
{
   timeout++;
   if(timeout>2000) break;
}
}

//中断配置
void MX_NVIC_Init(void)
{
  /* TIM2_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(TIM2_IRQn, 3, 0);
  HAL_NVIC_EnableIRQ(TIM2_IRQn);
  /* EXTI1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(EXTI1_IRQn, 2, 0);
  HAL_NVIC_EnableIRQ(EXTI1_IRQn);
  /* USART1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(USART1_IRQn, 2, 0);
  HAL_NVIC_EnableIRQ(USART1_IRQn);
  /* USART2_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(USART2_IRQn, 2, 1);
  HAL_NVIC_EnableIRQ(USART2_IRQn);
  /* USART3_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(USART3_IRQn, 2, 2);
  HAL_NVIC_EnableIRQ(USART3_IRQn);
}

//串口回调：把接受的数据放在数组中，一直接收，一直放入
if(huart->Instance==USART3)
{
Timer1ms.Uart3Count = 0;
Usart3.Data[Usart3.Count] = Usart3.MidBuffer;
Usart3.Count++;
if(Usart3.Count>=USART_BUFFER_LENGTH) Usart3.Count = 0;

}

出现丢数据现象：我发1234567890，可能程序只收到了其中的几个（3-5个），hal新手不知道问题所在，基本配置和标准库方式差不多，希望原子哥看看,谢谢。