HAL_SPI_TransmitReceive(&SpiHandle, &spi_SendData, &spi_ReceiveData, 1, 5000);

这是一个使用HAL库中的SPI传输函数`HAL_SPI_TransmitReceive`的示例。该函数用于在SPI总线上进行数据的发送和接收。

在这个例子中，`SpiHandle`是SPI总线的句柄，`spi_SendData`是要发送的数据，`spi_ReceiveData`是接收数据的缓冲区，`1`表示要传输的数据长度为1个字节，`5000`是超时时间（单位为毫秒）。

该函数会通过SPI总线将发送数据发送出去，并等待接收到的数据存储到接收缓冲区中。超时时间用于设置在等待接收数据时的最大等待时间，如果超过该时间仍未接收到数据，则函数会返回超时错误。

请注意，这只是一个示例代码，具体的实现取决于你所使用的硬件平台和HAL库的版本。在实际使用时，请根据你的需求进行相应的配置和调整。

相关问题

HAL_SPI_TransmitReceive(&hspi, txData, rxData, 5, HAL_MAX_DELAY);这其中的hspi需要传入值吗

HAL_SPI_TransmitReceive is a function in the STM32 HAL library that allows the user to transmit and receive data over an SPI (Serial Peripheral Interface) bus. It takes in the following parameters:

- SPI_HandleTypeDef *hspi: A handle to the SPI bus that the user wants to use for transmission and reception.
- uint8_t *pTxData: A pointer to the data buffer that contains the data to be transmitted.
- uint8_t *pRxData: A pointer to the buffer that will hold the received data.
- uint16_t Size: The number of bytes to be transmitted and received.

The function sends the data in the pTxData buffer over the SPI bus and simultaneously receives data into the pRxData buffer. The function blocks until all the data has been transmitted and received.

Here is an example of how to use HAL_SPI_TransmitReceive to send and receive data over an SPI bus:

uint8_t txData[2] = {0xAB, 0xCD};
uint8_t rxData[2] = {0};
HAL_SPI_TransmitReceive(&hspi1, txData, rxData, 2);

In this example, the function transmits the data in txData (0xAB and 0xCD) over the SPI bus and receives data into rxData. The function will block until both the transmission and reception are complete.

hal库spi传输函数的内部代码

由于HAL库的代码是开源的，因此可以在库的源文件中找到SPI传输函数的内部代码。以下是一些常用的SPI传输函数的内部代码示例：

1. HAL_SPI_Transmit()

该函数用于向SPI总线发送数据。其内部代码如下：

HAL_StatusTypeDef HAL_SPI_Transmit(SPI_HandleTypeDef *hspi, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  HAL_StatusTypeDef status = HAL_OK;
  uint32_t tickstart = 0;

  /* Check the parameters */
  assert_param(IS_SPI_DIRECTION_2LINES_OR_1LINE(hspi->Init.Direction));

  /* Process Locked */
  __HAL_LOCK(hspi);

  /* Init tickstart for timeout management*/
  tickstart = HAL_GetTick();

  /* Transmit data in 8 Bit mode */
  if(hspi->Init.DataSize == SPI_DATASIZE_8BIT)
  {
    while (Size--)
    {
      /* Wait until TXE flag is set to send data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Write data to TX buffer */
      hspi->Instance->DR = (*pData++);

      /* Wait until RXNE flag is set to receive data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Read received data */
      __HAL_SPI_CLEAR_RXNE_FLAG(hspi);
    }
  }
  else
  {
    /* Transmit data in 16 Bit mode */
    while (Size--)
    {
      /* Wait until TXE flag is set to send data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Write data to TX buffer */
      hspi->Instance->DR = *((uint16_t*)pData);
      pData += sizeof(uint16_t);

      /* Wait until RXNE flag is set to receive data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Read received data */
      __HAL_SPI_CLEAR_RXNE_FLAG(hspi);
    }
  }

  /* Process Unlocked */
  __HAL_UNLOCK(hspi);

  return status;
}

2. HAL_SPI_Receive()

该函数用于从SPI总线接收数据。其内部代码如下：

HAL_StatusTypeDef HAL_SPI_Receive(SPI_HandleTypeDef *hspi, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  HAL_StatusTypeDef status = HAL_OK;
  uint32_t tickstart = 0;

  /* Check the parameters */
  assert_param(IS_SPI_DIRECTION_2LINES_OR_1LINE(hspi->Init.Direction));

  /* Process Locked */
  __HAL_LOCK(hspi);

  /* Init tickstart for timeout management*/
  tickstart = HAL_GetTick();

  /* Receive data in 8 Bit mode */
  if(hspi->Init.DataSize == SPI_DATASIZE_8BIT)
  {
    while (Size--)
    {
      /* Wait until TXE flag is set to send dummy byte */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Write dummy byte */
      hspi->Instance->DR = 0xFF;

      /* Wait until RXNE flag is set to receive data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Read received data */
      *pData++ = hspi->Instance->DR;
    }
  }
  else
  {
    /* Receive data in 16 Bit mode */
    while (Size--)
    {
      /* Wait until TXE flag is set to send dummy byte */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Write dummy byte */
      hspi->Instance->DR = 0xFFFF;

      /* Wait until RXNE flag is set to receive data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Read received data */
      *((uint16_t*)pData) = hspi->Instance->DR;
      pData += sizeof(uint16_t);
    }
  }

  /* Process Unlocked */
  __HAL_UNLOCK(hspi);

  return status;
}

3. HAL_SPI_TransmitReceive()

该函数用于在SPI总线上进行双向数据传输。其内部代码如下：

HAL_StatusTypeDef HAL_SPI_TransmitReceive(SPI_HandleTypeDef *hspi, uint8_t *pTxData, uint8_t *pRxData, uint16_t Size, uint32_t Timeout)
{
  HAL_StatusTypeDef status = HAL_OK;
  uint32_t tickstart = 0;

  /* Check the parameters */
  assert_param(IS_SPI_DIRECTION_2LINES(hspi->Init.Direction));

  /* Process Locked */
  __HAL_LOCK(hspi);

  /* Init tickstart for timeout management*/
  tickstart = HAL_GetTick();

  /* Transmit and Receive data in 8 Bit mode */
  if(hspi->Init.DataSize == SPI_DATASIZE_8BIT)
  {
    while (Size--)
    {
      /* Wait until TXE flag is set to send data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Write data to TX buffer */
      hspi->Instance->DR = (*pTxData++);

      /* Wait until RXNE flag is set to receive data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Read received data */
      (*pRxData++) = hspi->Instance->DR;
    }
  }
  else
  {
    /* Transmit and Receive data in 16 Bit mode */
    while (Size--)
    {
      /* Wait until TXE flag is set to send data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Write data to TX buffer */
      hspi->Instance->DR = *((uint16_t*)pTxData);
      pTxData += sizeof(uint16_t);

      /* Wait until RXNE flag is set to receive data */
      if(SPI_WaitFlagStateUntilTimeout(hspi, SPI_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Read received data */
      *((uint16_t*)pRxData) = hspi->Instance->DR;
      pRxData += sizeof(uint16_t);
    }
  }

  /* Process Unlocked */
  __HAL_UNLOCK(hspi);

  return status;
}