求助一个I2C问题

逗比爱吃比豆提问时间：2014-9-5 16:35 /

我写了一个I2C读取的函数，用最简单的查询，首先我已经证明该函数是可以正常运行，然后给他改了一下，添加了一个变量I2C_TypeDef* I2Cx，想让他可以被任何I2C口读取。然后我把I2Cx赋值为I2C1（PS:此函数在I2C1下已经可以可以使用），就无法运行，好像I2Cx根本没有被替换成I2C1，求大神指教，代码如下
void I2C_Query_Read(I2C_TypeDef* I2Cx,u8 IMU_Address,u8 Address,u8 *IMU_Data,u8 NumByteToRead)
{
/*I2C_TypeDef* I2Cx;
#if USED_I2C1
I2Cx = I2C1;
#endif */
/********if I2C BUS busy,wait*********/
Time_Out = Time_limit;
while(I2C_GetFlagStatus(I2Cx, I2C_FLAG_BUSY))
  (Time_Out--)?delay_ms(1):I2C_TimeOut(I2Cx);
/**********start I2C*********/
I2C_GenerateSTART(I2Cx, ENABLE);
/***********check the EV5********/
Time_Out = Time_limit;
while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_MODE_SELECT ))
  (Time_Out--)?delay_ms(1):I2C_TimeOut(I2Cx);
/************send Address to I2C*******/
I2C_Send7bitAddress(I2Cx,IMU_Address, I2C_Direction_Transmitter);
/***********check EV6***********/
Time_Out = Time_limit;
while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
  (Time_Out--)?delay_ms(1):I2C_TimeOut(I2Cx);

I2C_Cmd(I2Cx, ENABLE);
/**********send IMU's register Address************/
I2C_SendData(I2Cx, Address);
/************clean EV8*****************************/
Time_Out = Time_limit;
while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_BYTE_TRANSMITTED ))
  (Time_Out--)?delay_ms(1):I2C_TimeOut(I2Cx);
/***********Start I2C again*********/
I2C_GenerateSTART(I2Cx, ENABLE);
Time_Out = Time_limit;
while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_MODE_SELECT ))
  (Time_Out--)?delay_ms(1):I2C_TimeOut(I2Cx);

I2C_Send7bitAddress(I2Cx,IMU_Address, I2C_Direction_Receiver);
Time_Out = Time_limit;
while(!I2C_CheckEvent(I2Cx,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))
  (Time_Out--)?delay_ms(1):I2C_TimeOut(I2Cx);
/* While there is data to be read */
   while(NumByteToRead)
{
    if(NumByteToRead == 1)
    {
     /* Disable Acknowledgement */
      I2C_AcknowledgeConfig(I2Cx, DISABLE);
      /* Send STOP Condition */
      I2C_GenerateSTOP(I2Cx, ENABLE);
  }
    /* Test on EV7 and clear it */
    if(I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_RECEIVED))
    {
      /* Read a byte from the MPU */
      *IMU_Data = I2C_ReceiveData(I2Cx);
      /* Point to the next location where the byte read will be saved */
      IMU_Data++;
     /* Decrement the read bytes counter */
      NumByteToRead--;
    }
}

/* Enable Acknowledgement to be ready for another reception */
I2C_AcknowledgeConfig(I2Cx, ENABLE);

}