求助STM32 I2C主机与一个从机通讯成功 与多个从机通讯失败

因为注释在这里显示乱了，所以以下代码都没有备注

//主机发送字节

void I2C_WriteBytes(unsigned char SlaveAddress)

{        

   I2C_GenerateSTART(I2C2,ENABLE);

   while(!((uint16_t)(I2C2->SR1)&(uint16_t)(0x0001)));//SB=1

   while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0003))!=0x0003);//BUSY=1+MSL=1

   I2C_Send7bitAddres(I2C2,SlaveAddress,I2C_Direction_Transmitter);          

  while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0002))!=0x0002);//ADDR=1

  while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0007))!=0x0007);

  while(g_I2Tx_Counter!=BUFFER_SIZE)

       {

          I2C_SendData(I2C2, g_I2TxBuffer[g_I2Tx_Counter++]);

          while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0080))!=0x0080);//TXE

          while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0007))!=0x0007);//MSL+BUSY+TRA

       }

  g_I2Tx_Counter=0;

I2C_GenerateSTOP(I2C2, ENABLE);

}

//主机接收字节

void I2C_ReadBytes(unsigned char  SlaveAddress)

{  

  I2C_GenerateSTART(I2C2, ENABLE);

  while(!((uint16_t)(I2C2->SR1)&(uint16_t)(0x0001)));//SB=1

  while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0003))!=0x0003);//BUSY=1                

  I2C_Send7bitAddress(I2C2, SlaveAddress, I2C_Direction_Receiver);        

//操作从机2时卡在这里，发送从机2地址之后程序就停在了这里        

  while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0002))!=0x0002);//确认地址是否发送完成

  while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0003))!=0x0003);

  while(g_I2Rx_Counter!=BUFFER_SIZE)

  { 

   if(g_I2Rx_Counter==(BUFFER_SIZE-1))

   {

      if(I2C_GetFlagStatus(I2C2, I2C_FLAG_RXNE)==1)

     {

         I2C_AcknowledgeConfig(I2C2, DISABLE);

         I2C_GenerateSTOP(I2C2, ENABLE);

     }

  }

while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0040))!=0x0040);

while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0003))!=0x0003);

g_I2RxBuffer[g_I2Rx_Counter++] = I2C_ReceiveData(I2C2);        

} 

I2C_GenerateSTOP(I2C2, ENABLE);

I2C_AcknowledgeConfig(I2C2, ENABLE);

g_I2Rx_Counter=0;

}

//主函数

int main(void)

{  

    unsigned char i;

    RCC_Configuration();

//    LED_Configuration();

    NVIC_Configuration();

    I2C_Configuration();

   USART_Configuration();

//    LEDG_ALL_ON;

//    while(g_USART1Received!=0xD1);

//从机1地址0x54，操作从机1

  I2C_WriteBytes(0x54);

  Sleep(100);

  I2C_ReadBytes(0x54);

for(i=0;i<BUFFER_SIZE;i++)

{

   g_I2RxBuffer[i]=0; 

}

    Sleep(100);

//操作从机2，从机2地址0x53

I2C_WriteBytes(0x53);                

Sleep(100);

I2C_ReadBytes(0x53);                

for(i=0;i<BUFFER_SIZE;i++)//清除接收缓存器

{

  g_I2RxBuffer[i]=0; 

}

    while(1)

   {

    }

}                

从机代码：[code]从机1和从机2代码一样只是初始化是定义的从机地址不一样

void I2C_Configuration(void)

{

        I2C_InitTypeDef I2C_InitStructure;

        GPIO_InitTypeDef GPIO_InitStructure;



        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2,ENABLE);

        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);



        /*PB10=SCL,PB11=SDA*/

        GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10|GPIO_Pin_11;                  

        GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; 

        GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_OD;     

        GPIO_Init(GPIOB,&GPIO_InitStructure);



        I2C_DeInit(I2C2);

        I2C_InitStructure.I2C_Mode = I2C_Mode_I2C ; 

        I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; 

        I2C_InitStructure.I2C_OwnAddress1 = 0x53;  

        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; 

        I2C_InitStructure.I2C_AcknowledgedAddress =I2C_AcknowledgedAddress_7bit; 

        I2C_InitStructure.I2C_ClockSpeed = 40000; 

        I2C_Init(I2C2, &I2C_InitStructure); 



        I2C_ITConfig(I2C2,I2C_IT_ERR,ENABLE);

        I2C_Cmd(I2C2,ENABLE);

        I2C_AcknowledgeConfig(I2C2,ENABLE);

}

//主机发送从机接收

void SlaveRxBytes()

{

    while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0002))!=0x0002);

    while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0002))!=0x0002);

     while(g_I2Rx_Counter!=BUFFER_SIZE)

      {     

        while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0040))!=0x0040);//RxNE=1

        g_I2RxBuffer[g_I2Rx_Counter++]=I2C_ReceiveData(I2C2); 

      }

  while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0010))!=0x0010);

  g_I2Rx_Counter=0;

}

//主机接收从机发送

void SlaveTxBytes()

{

    while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0002))!=0x0002);//ADDR=1 receive address matched

    while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0006))!=0x0006);//BUSY=1+MSL=0+TRA=1 

    I2C_SendData(I2C2,g_I2TxBuffer[g_I2Tx_Counter++]); 

    while(g_I2Tx_Counter!=BUFFER_SIZE)

     {

        while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0080))!=0x0080);

        I2C_SendData(I2C2,g_I2TxBuffer[g_I2Tx_Counter++]); 

      }

        while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0010))!=0x0010);

        g_I2Tx_Counter=0;

}