利用STM32F103硬件I2C驱动MPU6050，求救火哥！

suifeng830

程序很简单，就是先初始化GPIO，然后模式设置，结果程序就卡在while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));一直不出来。麻烦大家帮我分析一下！

#define MPU6050_I2C I2C1

void MPU6050_I2C_BufferRead(u8 slaveAddr, u8* pBuffer, u8 readAddr, u16 NumByteToRead)
{
// ENTR_CRT_SECTION();

  /* While the bus is busy */
  while(I2C_GetFlagStatus(MPU6050_I2C, I2C_FLAG_BUSY));

  /* Send START condition */
  I2C_GenerateSTART(MPU6050_I2C, ENABLE);

  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_MODE_SELECT));

  /* Send MPU6050 address for write */
  I2C_Send7bitAddress(MPU6050_I2C, slaveAddr, I2C_Direction_Transmitter);

  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

  /* Clear EV6 by setting again the PE bit */
  I2C_Cmd(MPU6050_I2C, ENABLE);

  /* Send the MPU6050's internal address to write to */
  I2C_SendData(MPU6050_I2C, readAddr);

  /* Test on EARM and clear it */
  while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  /* Send STRAT condition a second time */
  I2C_GenerateSTART(MPU6050_I2C, ENABLE);

  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_MODE_SELECT));

  /* Send MPU6050 address for read */
  I2C_Send7bitAddress(MPU6050_I2C, slaveAddr, I2C_Direction_Receiver);

  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

  /* While there is data to be read */
  while(NumByteToRead)
  {
    if(NumByteToRead == 1)
    {
      /* Disable Acknowledgement */
      I2C_AcknowledgeConfig(MPU6050_I2C, DISABLE);

      /* Send STOP Condition */
      I2C_GenerateSTOP(MPU6050_I2C, ENABLE);
    }

    /* Test on EV7 and clear it */
    if(I2C_CheckEvent(MPU6050_I2C, I2C_EVENT_MASTER_BYTE_RECEIVED))
    {
      /* Read a byte from the MPU6050 */
      *pBuffer = I2C_ReceiveData(MPU6050_I2C);

      /* Point to the next location where the byte read will be saved */
      pBuffer++;

      /* Decrement the read bytes counter */
      NumByteToRead--;
    }
  }

  /* Enable Acknowledgement to be ready for another reception */
  I2C_AcknowledgeConfig(MPU6050_I2C, ENABLE);
//  EXT_CRT_SECTION();

}

flyleaf

检查硬件接线，看看有没有接上拉电阻

suifeng830

接了1K的上拉电阻。

你太人才了

我也遇到了同样的问题

北海被害

驱动ds1307时钟模块时，我用硬件iic也得不到应答，不知道为什么，网上说f1的硬件iic有点问题，不知道是不是这样。

米珠薪桂

我也遇到了同样的问题，请问楼主解决了吗