I2C_GenerateSTART(I2C1, ENABLE);
  /* Test on I2C1 EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
 
 大多数时候死在循环那里啦,

附件里面是什么？

void I2C_RTC_ByteWrite(u8 pBuffer, u16 WriteAddr)
{
  u8 aH,bL;

  /* Send START condition */
  I2C_GenerateSTART(I2C1, ENABLE);
   
  /* Test on EV5 and clear it */
   while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
  
  /* Send RTC address for write */
  I2C_Send7bitAddress(I2C1, RTC_ADDRESS, I2C_Direction_Transmitter);
   
  /* Test on EV6 and clear it */
   while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));  
  bL = WriteAddr & 0x00ff;   //高8位地址
  aH = WriteAddr >> 8;                 //低8位地址
  /* Send the RTC's 高8位地址 */   
  I2C_SendData(I2C1, aH);
   
  /* Test on EV8 and clear it */
  while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  /* Send the RTC's 低8位地址 */   
  I2C_SendData(I2C1, bL);
   
  /* Test on EV8 and clear it */
  while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  /* Send the current byte */
  I2C_SendData(I2C1, pBuffer);
         
  /* Test on EV8 and clear it */
  while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  /* Send STOP condition */
  I2C_GenerateSTOP(I2C1, ENABLE);
}
牛人说这样是好的。说你是否从机没有返回。
我代为转述下。

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define I2C_PageSize           16
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

/* Private function prototypes -----------------------------------------------*/
static void I2C_EE_WaitEepromStandbyState(CPU_INT08U ucAddr);
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name  : I2C_EE_WaitEepromStandbyState
* Description    : Wait for EEPROM Standby state
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_EE_WaitEepromStandbyState(CPU_INT08U ucAddr)      
{
  vu16 SR1_Tmp = 0;
  do
  {
    /* Send START condition */
    I2C_GenerateSTART(I2C1, ENABLE);
    /* Read I2C1 SR1 register */
    SR1_Tmp = I2C_ReadRegister(I2C1, I2C_Register_SR1);
    /* Send EEPROM address for write */
    I2C_Send7bitAddress(I2C1, ucAddr, I2C_Direction_Transmitter);
  }while(!(I2C_ReadRegister(I2C1, I2C_Register_SR1) & I2C_FLAG_ADDR));
  
  /* Clear AF flag */
  I2C_ClearFlag(I2C1, I2C_FLAG_AF);
}
/*******************************************************************************
* Function Name  : I2C_EE_BufferWrite
* Description    : Writes buffer of data to the I2C EEPROM.
* Input          : - pBuffer : pointer to the buffer  containing the data to be
*                    written to the EEPROM.
*                  - WriteAddr : EEPROM's internal address to write to.
*                  - NumByteToWrite : number of bytes to write to the EEPROM.
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_EE_BufferWrite(CPU_INT08U ucDeviceAddr,CPU_INT16U WriteAddr, CPU_INT08U* pBuffer, u16 NumByteToWrite)
{
  CPU_INT08U NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;
  Addr = WriteAddr % I2C_PageSize;
  count = I2C_PageSize - Addr;
  NumOfPage =  NumByteToWrite / I2C_PageSize;
  NumOfSingle = NumByteToWrite % I2C_PageSize;
  /* If WriteAddr is I2C_PageSize aligned  */
  if(Addr == 0)
  {
    /* If NumByteToWrite < I2C_PageSize */
    if(NumOfPage == 0)
    {
      I2C_EE_PageWrite(ucDeviceAddr,WriteAddr,pBuffer,  NumOfSingle);
    }
    /* If NumByteToWrite > I2C_PageSize */
    else  
    {
      while(NumOfPage--)
      {
        I2C_EE_PageWrite(ucDeviceAddr,WriteAddr, pBuffer, I2C_PageSize);
        I2C_EE_WaitEepromStandbyState(ucDeviceAddr);
        WriteAddr +=  I2C_PageSize;
        pBuffer += I2C_PageSize;
      }
      if(NumOfSingle!=0)
      {
        I2C_EE_PageWrite(ucDeviceAddr,WriteAddr,pBuffer,  NumOfSingle);
      }
    }
  }
  /* If WriteAddr is not I2C_PageSize aligned  */
  else
  {
    /* If NumByteToWrite < I2C_PageSize */
    if(NumOfPage== 0)
    {
      I2C_EE_PageWrite(ucDeviceAddr,WriteAddr, pBuffer, NumOfSingle);
    }
    /* If NumByteToWrite > I2C_PageSize */
    else
    {
      NumByteToWrite -= count;
      NumOfPage =  NumByteToWrite / I2C_PageSize;
      NumOfSingle = NumByteToWrite % I2C_PageSize;   
      
      if(count != 0)
      {  
        I2C_EE_PageWrite(ucDeviceAddr, WriteAddr,pBuffer, count);
        WriteAddr += count;
        pBuffer += count;
      }
      
      while(NumOfPage--)
      {
        I2C_EE_PageWrite(ucDeviceAddr, WriteAddr, pBuffer,I2C_PageSize);
        WriteAddr +=  I2C_PageSize;
        pBuffer += I2C_PageSize;  
      }
      if(NumOfSingle != 0)
      {
        I2C_EE_PageWrite(ucDeviceAddr,WriteAddr,pBuffer,  NumOfSingle);
      }
    }
  }  
}
/*******************************************************************************
* Function Name  : I2C_EE_ByteWrite
* Description    : Writes one byte to the I2C EEPROM.
* Input          : - pBuffer : pointer to the buffer  containing the data to be
*                    written to the EEPROM.
*                  - WriteAddr : EEPROM's internal address to write to.
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_EE_ByteWrite(CPU_INT08U ucDeviceAddr,CPU_INT16U WriteAddr,CPU_INT08U* pBuffer)
{
  I2C_EE_WaitEepromStandbyState(ucDeviceAddr);
  
  /* Send STRAT condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));  
  /* Send EEPROM address for write */
  I2C_Send7bitAddress(I2C1, ucDeviceAddr, I2C_Direction_Transmitter);
  
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
      
  /* Send the EEPROM's internal address to write to */   
  I2C_SendData(I2C1, (WriteAddr&0xff00)>>8);  
  /* Test on EV8 and clear it */
  while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  /* Send the EEPROM's internal address to write to */   
  I2C_SendData(I2C1, WriteAddr&0xff );  
  /* Test on EV8 and clear it */
  while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  /* Send the byte to be written */
  I2C_SendData(I2C1, *pBuffer);
   
  /* Test on EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  
  /* Send STOP condition */
  I2C_GenerateSTOP(I2C1, ENABLE);
}
/*******************************************************************************
* Function Name  : I2C_EE_PageWrite
* Description    : Writes more than one byte to the EEPROM with a single WRITE
*                  cycle. The number of byte can't exceed the EEPROM page size.
* Input          : - pBuffer : pointer to the buffer containing the data to be
*                    written to the EEPROM.
*                  - WriteAddr : EEPROM's internal address to write to.
*                  - NumByteToWrite : number of bytes to write to the EEPROM.
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_EE_PageWrite(CPU_INT08U ucDeviceAddr,CPU_INT16U WriteAddr, CPU_INT08U* pBuffer, CPU_INT08U NumByteToWrite)
{
  I2C_EE_WaitEepromStandbyState(ucDeviceAddr);
  
  /* Send START condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  
  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
  
  /* Send EEPROM address for write */
  I2C_Send7bitAddress(I2C1, ucDeviceAddr, I2C_Direction_Transmitter);
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));  
  /* Send the EEPROM's internal address to write to */   
  I2C_SendData(I2C1, (WriteAddr&0xff00)>>8);  
  /* Test on EV8 and clear it */
  while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  /* Send the EEPROM's internal address to write to */   
  I2C_SendData(I2C1, WriteAddr&0xff );  
  /* Test on EV8 and clear it */
  while(! I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  /* While there is data to be written */
  while(NumByteToWrite--)  
  {
    /* Send the current byte */
    I2C_SendData(I2C1, *pBuffer);
    /* Point to the next byte to be written */
    pBuffer++;
  
    /* Test on EV8 and clear it */
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  }
  /* Send STOP condition */
  I2C_GenerateSTOP(I2C1, ENABLE);
}
/*******************************************************************************
* Function Name  : I2C_EE_BufferRead
* Description    : Reads a block of data from the EEPROM.
* Input          : - pBuffer : pointer to the buffer that receives the data read
*                    from the EEPROM.
*                  - ReadAddr : EEPROM's internal address to read from.
*                  - NumByteToRead : number of bytes to read from the EEPROM.
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_EE_BufferRead(CPU_INT08U ucDeviceAddr,CPU_INT16U ReadAddr,CPU_INT08U* pBuffer,  u16 NumByteToRead)
{  
  
  I2C_EE_WaitEepromStandbyState(ucDeviceAddr);
  /* Send START condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  
  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
  
  /* In the case of a single data transfer disable ACK before reading the data */
  if(NumByteToRead==1)
  {
    I2C_AcknowledgeConfig(I2C1, DISABLE);
  }
  
  /* Send EEPROM address for write */
  I2C_Send7bitAddress(I2C1, ucDeviceAddr, I2C_Direction_Transmitter);
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
  
  /* Clear EV6 by setting again the PE bit */
  I2C_Cmd(I2C1, ENABLE);
  /* Send the EEPROM's internal address to write to */
  I2C_SendData(I2C1, (ReadAddr&0xff00)>>8);  
  /* Test on EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  /* Send the EEPROM's internal address to write to */
  I2C_SendData(I2C1, (ReadAddr&0xff));  
  /* Test on EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  
  /* Send STRAT condition a second time */  
  I2C_GenerateSTART(I2C1, ENABLE);
  
  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
  
  /* Send EEPROM address for read */
  I2C_Send7bitAddress(I2C1, ucDeviceAddr, I2C_Direction_Receiver);
  
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
  
  /* While there is data to be read */
  while(NumByteToRead)  
  {
    /* Test on EV7 and clear it */
    if(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED))  
    {
      if(NumByteToRead == 2)
      {
        /* Disable Acknowledgement */
        I2C_AcknowledgeConfig(I2C1, DISABLE);
      }
      if(NumByteToRead == 1)
      {
        /* Send STOP Condition */
        I2C_GenerateSTOP(I2C1, ENABLE);
      }
      
      /* Read a byte from the EEPROM */
      *pBuffer = I2C_ReceiveData(I2C1);
      /* 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(I2C1, ENABLE);
}

硬件的I2C好像是有点问题的，最好用软件模拟I2C