TMP102 issue

Dear Aaron:

     Sorry! Forgot to put main block of the code. Below is the complete code:

void I2c_Config(void)

{

         GPIO_InitTypeDef GPIO_InitStructure;

         I2C_InitTypeDef I2C_InitStructure;

         /* I2C1 GPIO Config

         PB6       -------> I2C1 SCL

         PB7         -------> I2C1 SDA

         */

         RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOB , ENABLE);

         GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;

         GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

         GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

         GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;

         GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

         GPIO_Init(GPIOB, &GPIO_InitStructure);

         GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_4);

         GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_4);

         RCC_I2CCLKConfig(RCC_I2C2CLK_SYSCLK);

         RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C1 | RCC_APB1Periph_I2C2, ENABLE);

         I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;

         I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

         I2C_InitStructure.I2C_AnalogFilter = I2C_AnalogFilter_Enable;

         I2C_InitStructure.I2C_DigitalFilter = 0x00;

         I2C_InitStructure.I2C_OwnAddress1 = 0x00;

         I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;

         I2C_InitStructure.I2C_Timing = 0x00201D2B;

         I2C_Init(I2C1, &I2C_InitStructure);

         I2C_Cmd(I2C1, ENABLE);

}

void Ic_Tmp102_I2c_Rd (I2C_TypeDef* I2Cx,unsigned char Slave_Addr, unsigned char Command_Addr, unsigned char *data0,unsigned char *data1)

{

         /* Test on BUSY Flag */

       gI2C_Timeout = dI2C_TIMEOUT;

       while(I2C_GetFlagStatus(I2Cx, I2C_ISR_BUSY) != RESET)

       {

                      if((gI2C_Timeout--) == 0)                                                               

                                              return  dI2C_CHECK_FAIL;

       }

         I2C_TransferHandling(I2Cx, Slave_Addr, 1, I2C_SoftEnd_Mode, I2C_Generate_Start_Write);

       gI2C_Timeout = dI2C_TIMEOUT;

       while(I2C_GetFlagStatus(I2Cx, I2C_ISR_TXIS) == RESET)

       {

                      if((gI2C_Timeout--) == 0)                                   

                                              return  dI2C_CHECK_FAIL;

       }

       I2C_SendData(I2Cx, (uint8_t)Command_Addr);

         gI2C_Timeout = dI2C_TIMEOUT;

       while(I2C_GetFlagStatus(I2Cx, I2C_ISR_TC) == RESET)

       {

                      if((gI2C_Timeout--) == 0)                          

                                              return  dI2C_CHECK_FAIL;

  } 

         I2C_TransferHandling(I2Cx, Slave_Addr, 2, I2C_AutoEnd_Mode, I2C_Generate_Start_Read);

    gI2C_Timeout = dI2C_TIMEOUT;

    while(I2C_GetFlagStatus(I2Cx, I2C_ISR_RXNE) == RESET)   

    {

                    if((gI2C_Timeout--) == 0)

                                              return  dI2C_CHECK_FAIL;

    }

    *data0= I2C_ReceiveData(I2Cx);

    gI2C_Timeout = dI2C_TIMEOUT;

    while(I2C_GetFlagStatus(I2Cx, I2C_ISR_RXNE) == RESET)   

    {

                    if((gI2C_Timeout--) == 0)

                                             return  dI2C_CHECK_FAIL;

    }

    *data1= I2C_ReceiveData(I2Cx);

       gI2C_Timeout = dI2C_TIMEOUT;

       while(I2C_GetFlagStatus(I2Cx, I2C_ISR_STOPF) == RESET)  

       {

                      if((gI2C_Timeout--) == 0)

                                              return  dI2C_CHECK_FAIL;

       }

       I2C_ClearFlag(I2Cx, I2C_ICR_STOPCF);

       return  dI2C_CHECK_OK;

}

int main(void)

{

         unsigned char         Data_Msb =0, Data_Lsb =0;

         unsigned int            Data_Msb_i =0, Data_Lsb_i =0;

         unsigned int              Data=0;

         unsigned int            Data_Port_Temp=0;

         int                              check=0;

         float                           temp=0;

         I2c_Config();

         while(1)

         {

                  Ic_Tmp102_I2c_Rd (I2C1,0x90, 0x00, &Data_Msb , &Data_Lsb );

                  Data_Msb_i    =       Data_Msb;

                  Data_Lsb_i      =       Data_Lsb;

                  Data =((( Data_Msb_i <<8) | (Data_Lsb_i)) >>4);

                  check=( Data &0x800)>>11;

                  if(check==1)

                  {

                                              Data_Port_Temp=(~ Data)&0x07ff;

                                            temp=(float)Data_Port_Temp*(float)0.0625*(float)-1;

                                              Print_Float(temp);

                  }

                  else

                  {

                                              Data_Port_Temp=( Data &0x07ff);

                                              temp=(float)Data_Port_Temp*(float)0.0625;

                                              Print_Float(temp);

                  }

         }

}

Thank you!

Brian

Dear sir:

Any idea of that? I am urge to find the solution.

Appreciate!

Dear Aaron:

     Sorry! I found that there's another TMP102 on I2C bus with the same slave ID. That's why the readout is abnormal. After changing to

another address. The readout is OK now.

Thank you!

Brian