STM32 und CMPS03

// I2C1 configuration-----------------------------------------------------

        I2C_DeInit(I2C1);

   I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;

    I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;

    I2C_InitStructure.I2C_OwnAddress1 = I2C1_SLAVE_ADDRESS7;

    I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;

    I2C_InitStructure.I2C_AcknowledgedAddress =  I2C_AcknowledgedAddress_7bit;

    I2C_InitStructure.I2C_ClockSpeed = 100000; //ClockSpeed;

    I2C_Init(I2C1, &I2C_InitStructure);

  //Remap I2C1

//  GPIO_PinRemapConfig(GPIO_Remap_I2C1, ENABLE);

  // Configure I2C1 pins: SCL and SDA 

    GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7;

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

    GPIO_Init(GPIOB, &GPIO_InitStructure);

  I2C_Cmd(I2C1, ENABLE);

  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));

//  I2C_AcknowledgeConfig(I2C1, ENABLE);

// Kompassmodul auslesen

while(1)

{

I2C_GenerateSTART(I2C1, ENABLE);

    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

    I2C_Send7bitAddress(I2C1, 0xC0, I2C_Direction_Transmitter);

    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

    I2C_SendData(I2C1, 0x02); //Register 2 ; Auflösung 0-3599

    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); 

    I2C_GenerateSTART(I2C1, ENABLE);

    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

    I2C_Send7bitAddress(I2C1, 0xC1, I2C_Direction_Receiver);

    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));    //keine Rückgabe von ADDR von Kompassmodul???

    posHB = I2C_ReceiveData(I2C1);  

    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));

    posLB = I2C_ReceiveData(I2C1);

    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));

    I2C_GenerateSTOP(I2C1, ENABLE);

    pos_ist = (((uint16)posHB) << 8 | posLB);

}