stm 32 读取485信号的传感器数据问题，读不到数据

忠犬八公 · 发表于 2017-12-1 17:40:26

#define MAX_SENSOR_BUF_LEN    64
#define SENSOR_RXBUF_LEN    7
#define SENSOR_TXBUF_LEN    8
static uint8_t sensorUartBuffer[MAX_SENSOR_BUF_LEN];
static uint8_t sensorUartBufferIndex = 0;
static uint8_t sensorReportEnabled = 0;
static uint8_t prxbuff = 0;
//static uint8_t ptxbuff = 0;
static uint8_t rxbuff[SENSOR_RXBUF_LEN];
static uint8_t txbuff[SENSOR_TXBUF_LEN] = {0x30,0x03,0x00,0x06,0x00,0x01,0x60,0x2A};    //PM2.5

      uint16_t i=0;
      uint8_t *pSend;
      pSend = txbuff;
      HAL_Delay(5000);
      while(i++ < SENSOR_TXBUF_LEN)
      {
         if(HAL_UART_Transmit(&MyDebugUart,(uint8_t *)(pSend++),1,5000) != HAL_OK)
      {
         debug_print("HAL_UART_Transmit fail!");
      }
      }

      if( HAL_UART_Receive_IT(&MyDebugUart,(uint8_t *)sensorUartBuffer,1) != HAL_OK )
      {
      debug_print("HAL_UART_Receive fail!");
      }
      for(size_t i=0;i<=sizeof(rxbuff)-1;i++)
      {
      debug_print("@%d %x@",rxbuff[i],rxbuff[i]);
      }

中断处理函数：
void sensorIRQHandler(void)
{
  uint8_t data;
  if((MyDebugUart.Instance->SR) & UART_FLAG_RXNE)
  {
   CLEAR_BIT(MyDebugUart.Instance->SR,UART_FLAG_RXNE|UART_FLAG_ORE);
   data = MyDebugUart.Instance->DR;
   /*
   sensorUartBuffer[sensorUartBufferIndex++] = data;
   if(sensorUartBufferIndex >= MAX_SENSOR_BUF_LEN)
   {
      sensorUartBufferIndex = 0;
   }
   *///
   rxbuff[prxbuff++] = data;
   HAL_UART_Receive_IT(&MyDebugUart,(uint8_t *)sensorUartBuffer,1);
   if(prxbuff >= MAX_SENSOR_BUF_LEN)
   {
      prxbuff = 0;
   }

  }
}

打印的：0`*HAL_UART_Receive fail!@0 0@@0 0@@0 0@@0 0@@0 0@@0 0@@0 0@
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