STM32F0 I2C Error

void I2CInit(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  I2C_InitTypeDef I2C_InitStructure;

  NVIC_InitTypeDef NVIC_InitStructure;

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOF, ENABLE);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);

  //RCC_APB1Periph_I2C2

  //RCC_I2CCLKConfig(RCC_I2C1CLK_SYSCLK);

  GPIO_PinAFConfig(GPIOF, GPIO_PinSource6, GPIO_AF_1);

  GPIO_PinAFConfig(GPIOF, GPIO_PinSource7, GPIO_AF_1);

  //Configure 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;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;

  GPIO_Init(GPIOF, &GPIO_InitStructure);

  I2C_DeInit(I2C2);

  I2C_Cmd(I2C2, DISABLE);

  I2C_InitStructure.I2C_AnalogFilter = I2C_AnalogFilter_Enable;

  I2C_InitStructure.I2C_DigitalFilter = 0x05;

  I2C_InitStructure.I2C_OwnAddress1 = 0x30;//0x40;

  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;

  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;

  I2C_InitStructure.I2C_Timing =0x00805C87; //100KHz (see page 529 - table 73 in the manual reference)

  I2C_InitStructure.I2C_AcknowledgedAddress = 0x30;//I2C_AcknowledgedAddress_7bit;

  I2C_Init(I2C2, &I2C_InitStructure);

  I2C_AcknowledgeConfig(I2C2, ENABLE);

  I2C_Cmd(I2C2, ENABLE);

  I2C_ITConfig(I2C2, I2C_IT_RXI, ENABLE);

  I2C_ITConfig(I2C2, I2C_IT_TXI, ENABLE);

  I2C_ITConfig(I2C2, I2C_IT_TCI, ENABLE);

  NVIC_InitStructure.NVIC_IRQChannel = I2C2_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_InitStructure.NVIC_IRQChannelPriority = 0;

  NVIC_Init(&NVIC_InitStructure);

}

void I2CSend(void)

{

    I2C_SlaveAddressConfig(I2C2, 0x30);

    I2C_GenerateSTART(I2C2, ENABLE);

    //I2C_MasterRequestConfig(I2C2, I2C_Direction_Transmitter);

    I2C_NumberOfBytesConfig(I2C2, 8);

    I2C_SendData(I2C2, 0x55);

    I2C_GenerateSTOP(I2C2, ENABLE);

}