STM32 I2C初始化与ADXL345通信

#include "ADXL345.h"
#include "stm32f10x_lib.h"
#include "math.h"
/**********************************************************************/
/*IIC配置                                         */
/*   */
/**********************************************************************/
void Iic_Init()
{
GPIO_InitTypeDef GPIO_InitStructure;

 I2C_InitTypeDef I2C_InitStructure;
 
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
/* Configure IO connected to IIC*********************/
 GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_10 | GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
   GPIO_Init(GPIOB, &GPIO_InitStructure);

 I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
   I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
   I2C_InitStructure.I2C_OwnAddress1 = I2C2_SLAVE_ADDRESS7;
   I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
   I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
   I2C_InitStructure.I2C_ClockSpeed = 200000;
 
 I2C_Cmd(I2C2, ENABLE);   

 I2C_Init(I2C2, &I2C_InitStructure);
}
/**********************************************************************/
/*IIC写一个字节                                         */
/*   */
/**********************************************************************/
void I2C_WriteByte(unsigned char id,unsigned char write_address,unsigned char byte)
{
I2C_GenerateSTART(I2C2,ENABLE);
//产生起始条件
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
//等待ACK
I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter);
//向设备发送设备地址
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
//等待ACK
I2C_SendData(I2C2, write_address);
//寄存器地址
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
//等待ACK
I2C_SendData(I2C2, byte);
//发送数据
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
//发送完成
I2C_GenerateSTOP(I2C2, ENABLE);
//产生结束信号
}
/**********************************************************************/
/*IIC读数据                                            */
/*   */