TTL串口U盘模块,自适应波特率

只看该作者 · 2025-3-1 20:30

TTL串口U盘模块,自适应波特率：

一、模块功能介绍:

二、程序源代码片段:

/**
  * @brief USART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART1_UART_Init(uint8_t mode)
{
  huart1.Instance = USARTx;
  huart1.Init.BaudRate = 460800;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;

/*##Configure the AutoBaudRate method */
  huart1.AdvancedInit.AdvFeatureInit =UART_ADVFEATURE_AUTOBAUDRATE_INIT;
  huart1.AdvancedInit.AutoBaudRateEnable = UART_ADVFEATURE_AUTOBAUDRATE_ENABLE;

  switch(mode){
  case 0:
huart1.AdvancedInit.AutoBaudRateMode =
      UART_ADVFEATURE_AUTOBAUDRATE_ONSTARTBIT;
break;
  case 1:
huart1.AdvancedInit.AutoBaudRateMode =
      UART_ADVFEATURE_AUTOBAUDRATE_ONFALLINGEDGE;
break;
  case 2:
huart1.AdvancedInit.AutoBaudRateMode =
      UART_ADVFEATURE_AUTOBAUDRATE_ON0X7FFRAME;
break;

  case 3:
huart1.AdvancedInit.AutoBaudRateMode =
      UART_ADVFEATURE_AUTOBAUDRATE_ON0X55FRAME;
break;
  default:
break;
  }

  if (HAL_UART_Init(&huart1) != HAL_OK){
Error_Handler();
  }
}

/****************************************************************************
* 功能：  USART1---自动波特率检测启动函数
*---------------------------------------------------------------------------*
* 入口参数：ni.
* 出口参数：nil
****************************************************************************/
void AutoBaudRate_DetectStart(void)
{
  char temp_buf[64];
  uint32_t baudrateval;

  /* Wait until Receive enable acknowledge flag is set */
  while(__HAL_UART_GET_FLAG(&huart1,UART_FLAG_REACK) == RESET)
  {vTaskDelay(1);}

  /* Wait until Transmit enable acknowledge flag is set */
  while(__HAL_UART_GET_FLAG(&huart1,UART_FLAG_TEACK) == RESET)
  {vTaskDelay(1);}

  /* Loop until the end of USART1_AutoBaudrate phase */
  while(__HAL_UART_GET_FLAG(&huart1,UART_FLAG_ABRF) == RESET)
  {vTaskDelay(1);}

/* If AutoBaudBate error occurred */
  if (__HAL_UART_GET_FLAG(&huart1, UART_FLAG_ABRE)!= RESET){
Error_Handler();
  }else{
/* Wait until RXNE flag is set */
while(__HAL_UART_GET_FLAG(&huart1,UART_FLAG_RXNE) == RESET)
{vTaskDelay(1);}

HAL_UART_Receive(&huart1, (uint8_t *)aTxBuffer, TXBUFFERSIZE,100);

/* Send acknowledgement message*/
if (HAL_UART_Transmit(&huart1, (uint8_t *)aTxBuffer, strlen((char *)aTxBuffer),100)!= HAL_OK){
   Error_Handler();
}

while(__HAL_UART_GET_FLAG(&huart1,USART_FLAG_TC) == RESET)
{vTaskDelay(1);}

//计算波特率
baudrateval = HAL_RCC_GetSysClockFreq() / USART1->BRR;

sprintf(temp_buf,"\r\n检测到波特率为:%d \r\n",baudrateval);

HAL_UART_Transmit(&huart1, (uint8_t *)temp_buf, strlen(temp_buf),100);

while(__HAL_UART_GET_FLAG(&huart1,USART_FLAG_TC) == RESET)
{vTaskDelay(1);}
  }
}

/*
***************************************************************************************
*       函数名: vTask_GetFiles_Data
*       功能说明: 获取文件命令数据任务
*-------------------------------------------------------------------------------------*
*       形参: pvParameters 是在创建该任务时传递的形参
*       返回值: 无
****************************************************************************************
*/
static void vTask_GetFiles_Data(void *pvParameters)
{
#if AUTOBAUDRATE_All_TEST_EN>0
  AutoBaudrate_AllParams_Test();
#else
MX_USART1_UART_Init(3); //初始化串口
AutoBaudRate_DetectStart(); //自动波特率检测
  //使能串口1接收中断: 每接收1个字节,中断一次
HAL_UART_Receive_IT(&huart1,&sRcv_data,1);
vTaskDelay(200);
#endif

  while(1)
  {
if(UART1_received==1){ //set----接收数据包完成
   taskENTER_CRITICAL();
   UART1_received=0; //clear
   taskEXIT_CRITICAL();

   if(flag_UDisk_Ok==1){
      Real_UDisk_WriteFiles();  //U盘文件操作
   }
   HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_11);
}
vTaskDelay(10);
  }
}